Merge pull request #145 from haberman/arrayapi

Generated code API changes for array and hazzers.

32 files changed, 1797 insertions, 716 deletions

diff --git a/BUILD b/BUILD
index 594665b..1cef4b8 100644
--- a/BUILD
+++ b/BUILD
@@ -1,15 +1,32 @@
 load(
     ":build_defs.bzl",
+    "licenses",  # copybara:strip_for_google3
     "lua_cclibrary",
     "lua_library",
     "lua_binary",
     "lua_test",
     "generated_file_staleness_test",
     "make_shell_script",
+    "map_dep",
     "upb_amalgamation",
     "upb_proto_library",
 )
 
+licenses(["notice"])  # BSD (Google-authored w/ possible external contributions)
+
+exports_files([
+    "LICENSE",
+    "build_defs",
+])
+
+COPTS = [
+    # copybara:strip_for_google3_begin
+    "-std=c89",
+    "-pedantic",
+    "-Wno-long-long",
+    # copybara:strip_end
+]
+
 # C/C++ rules ##################################################################
 
 cc_library(
@@ -27,7 +44,6 @@ cc_library(
         "upb/port_undef.inc",
         "upb/refcounted.c",
         "upb/sink.c",
-        "upb/structdefs.int.h",
         "upb/structs.int.h",
         "upb/table.c",
         "upb/table.int.h",
@@ -38,6 +54,7 @@ cc_library(
         "upb/decode.h",
         "upb/def.h",
         "upb/encode.h",
+        "upb/generated_util.h",
         "upb/handlers.h",
         "upb/msg.h",
         "upb/msgfactory.h",
@@ -45,11 +62,7 @@ cc_library(
         "upb/sink.h",
         "upb/upb.h",
     ],
-    copts = [
-        "-std=c89",
-        "-pedantic",
-        "-Wno-long-long",
-    ],
+    copts = COPTS,
     visibility = ["//visibility:public"],
 )
 
@@ -63,11 +76,7 @@ cc_library(
         "upb/descriptor/descriptor.upbdefs.h",
         "upb/descriptor/reader.h",
     ],
-    copts = [
-        "-std=c89",
-        "-pedantic",
-        "-Wno-long-long",
-    ],
+    copts = COPTS,
     deps = [":upb"],
 )
 
@@ -82,6 +91,7 @@ cc_library(
         "upb/pb/textprinter.c",
         "upb/pb/varint.c",
         "upb/pb/varint.int.h",
+        "upb/table.int.h",
     ],
     hdrs = [
         "upb/pb/decoder.h",
@@ -89,11 +99,7 @@ cc_library(
         "upb/pb/glue.h",
         "upb/pb/textprinter.h",
     ],
-    copts = [
-        "-std=c89",
-        "-pedantic",
-        "-Wno-long-long",
-    ],
+    copts = COPTS,
     deps = [
         ":upb",
         ":upb_descriptor",
@@ -110,11 +116,7 @@ cc_library(
         "upb/json/parser.h",
         "upb/json/printer.h",
     ],
-    copts = [
-        "-std=c89",
-        "-pedantic",
-        "-Wno-long-long",
-    ],
+    copts = COPTS,
     deps = [
         ":upb",
         ":upb_pb",
@@ -129,32 +131,44 @@ cc_library(
     deps = [":upb"],
 )
 
-# Amalgamation #################################################################
+# upb compiler #################################################################
 
-py_binary(
-    name = "amalgamate",
-    srcs = ["tools/amalgamate.py"],
+cc_library(
+    name = "upbc_generator",
+    srcs = [
+        "upbc/generator.cc",
+        "upbc/message_layout.cc",
+        "upbc/message_layout.h",
+    ],
+    hdrs = ["upbc/generator.h"],
+    deps = [
+        map_dep("@absl//absl/base:core_headers"),
+        map_dep("@absl//absl/strings"),
+        map_dep("@com_google_protobuf//:protobuf"),
+        map_dep("@com_google_protobuf//:protoc_lib"),
+    ],
 )
 
-upb_amalgamation(
-    name = "gen_amalgamation",
-    outs = [
-        "upb.c",
-        "upb.h",
-    ],
-    amalgamator = ":amalgamate",
-    libs = [
-        ":upb",
-        ":upb_descriptor",
-        ":upb_pb",
-        ":upb_json",
+cc_binary(
+    name = "protoc-gen-upb",
+    srcs = ["upbc/main.cc"],
+    deps = [
+        ":upbc_generator",
+        map_dep("@com_google_protobuf//:protoc_lib"),
     ],
 )
 
-cc_library(
-    name = "amalgamation",
-    srcs = ["upb.c"],
-    hdrs = ["upb.h"],
+# We strip the tests and remaining rules from google3 until the upb_proto_library()
+# and upb_proto_reflection_library() rules are fixed.
+
+# copybara:strip_for_google3_begin
+
+lua_binary(
+    name = "lua_upbc",
+    luadeps = [
+        "lua/upbc_lib",
+    ],
+    luamain = "tools/upbc.lua",
 )
 
 # C/C++ tests ##################################################################
@@ -265,11 +279,11 @@ cc_binary(
     srcs = [
         "tests/conformance_upb.c",
     ],
+    copts = ["-Ibazel-out/k8-fastbuild/bin"],
     deps = [
         ":conformance_proto_upb",
         ":upb",
     ],
-    copts = ["-Ibazel-out/k8-fastbuild/bin"],
 )
 
 make_shell_script(
@@ -289,6 +303,35 @@ sh_test(
     ],
 )
 
+# Amalgamation #################################################################
+
+py_binary(
+    name = "amalgamate",
+    srcs = ["tools/amalgamate.py"],
+)
+
+upb_amalgamation(
+    name = "gen_amalgamation",
+    outs = [
+        "upb.c",
+        "upb.h",
+    ],
+    amalgamator = ":amalgamate",
+    libs = [
+        ":upb",
+        ":upb_descriptor",
+        ":upb_pb",
+        ":upb_json",
+    ],
+)
+
+cc_library(
+    name = "amalgamation",
+    srcs = ["upb.c"],
+    hdrs = ["upb.h"],
+    copts = COPTS,
+)
+
 # Lua libraries. ###############################################################
 
 lua_cclibrary(
@@ -374,42 +417,12 @@ lua_test(
     luamain = "tests/bindings/lua/test_upb.pb.lua",
 )
 
-# upb compiler #################################################################
-
-lua_binary(
-    name = "lua_upbc",
-    luadeps = [
-        "lua/upbc_lib",
-    ],
-    luamain = "tools/upbc.lua",
-)
-
-cc_library(
-    name = "upbc_generator",
-    hdrs = ["upbc/generator.h"],
-    srcs = ["upbc/generator.cc", "upbc/message_layout.h", "upbc/message_layout.cc"],
-    deps = [
-        "@com_google_protobuf//:protobuf",
-        "@com_google_protobuf//:protoc_lib",
-        "@absl//absl/strings",
-    ],
-)
-
-cc_binary(
-    name = "protoc-gen-upb",
-    srcs = ["upbc/main.cc"],
-    deps = [
-        ":upbc_generator",
-        "@com_google_protobuf//:protoc_lib",
-    ],
-)
-
 # Test the CMake build #########################################################
 
 make_shell_script(
     name = "gen_run_cmake_build",
     out = "run_cmake_build.sh",
-    contents = "mkdir build && cd build && cmake .. && make -j8 && make test"
+    contents = "mkdir build && cd build && cmake .. && make -j8 && make test",
 )
 
 sh_test(
@@ -463,10 +476,13 @@ py_binary(
 
 genrule(
     name = "gen_cmakelists",
+    srcs = [
+        "BUILD",
+        "WORKSPACE",
+    ],
     outs = ["generated/CMakeLists.txt"],
-    srcs = ["BUILD", "WORKSPACE"],
+    cmd = "$(location :make_cmakelists) $@",
     tools = [":make_cmakelists"],
-    cmd = "$(location :make_cmakelists) $@"
 )
 
 genrule(
@@ -510,8 +526,8 @@ genrule(
     ],
     cmd = "$(location @com_google_protobuf//:protoc) $< --upb_out=$(GENDIR)/generated --plugin=protoc-gen-upb=$(location :protoc-gen-upb)",
     tools = [
+        ":protoc-gen-upb",
         "@com_google_protobuf//:protoc",
-        ":protoc-gen-upb"
     ],
 )
 
@@ -563,3 +579,5 @@ generated_file_staleness_test(
     ],
     generated_pattern = "generated/%s",
 )
+
+# copybara:strip_end
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 30822ce..49a8385 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -72,7 +72,6 @@ add_library(upb
   upb/port_undef.inc
   upb/refcounted.c
   upb/sink.c
-  upb/structdefs.int.h
   upb/structs.int.h
   upb/table.c
   upb/table.int.h
@@ -81,6 +80,7 @@ add_library(upb
   upb/decode.h
   upb/def.h
   upb/encode.h
+  upb/generated_util.h
   upb/handlers.h
   upb/msg.h
   upb/msgfactory.h
@@ -103,6 +103,7 @@ add_library(upb_pb
   upb/pb/textprinter.c
   upb/pb/varint.c
   upb/pb/varint.int.h
+  upb/table.int.h
   upb/pb/decoder.h
   upb/pb/encoder.h
   upb/pb/glue.h
diff --git a/build_defs.bzl b/build_defs.bzl
index 7445fce..6cf387e 100644
--- a/build_defs.bzl
+++ b/build_defs.bzl
@@ -1,4 +1,3 @@
-
 _shell_find_runfiles = """
   # --- begin runfiles.bash initialization ---
   # Copy-pasted from Bazel's Bash runfiles library (tools/bash/runfiles/runfiles.bash).
@@ -100,7 +99,7 @@ BASE=$(dirname $(rlocation upb/upb_c.so))
 export LUA_CPATH="$BASE/?.so"
 export LUA_PATH="$BASE/?.lua"
 $(rlocation lua/lua) $(rlocation upb/tools/upbc.lua) "$@"
-"""
+""",
     )
 
     rule(
@@ -109,10 +108,10 @@ $(rlocation lua/lua) $(rlocation upb/tools/upbc.lua) "$@"
         data = ["@lua//:lua", "@bazel_tools//tools/bash/runfiles", luamain] + luadeps,
     )
 
-def lua_binary(name, luamain, luadeps=[]):
+def lua_binary(name, luamain, luadeps = []):
     _lua_binary_or_test(name, luamain, luadeps, native.sh_binary)
 
-def lua_test(name, luamain, luadeps=[]):
+def lua_test(name, luamain, luadeps = []):
     _lua_binary_or_test(name, luamain, luadeps, native.sh_test)
 
 def generated_file_staleness_test(name, outs, generated_pattern):
@@ -163,9 +162,9 @@ def generated_file_staleness_test(name, outs, generated_pattern):
 
 SrcList = provider(
     fields = {
-        'srcs' : 'list of srcs',
-        'hdrs' : 'list of hdrs',
-    }
+        "srcs": "list of srcs",
+        "hdrs": "list of hdrs",
+    },
 )
 
 def _file_list_aspect_impl(target, ctx):
@@ -205,9 +204,25 @@ upb_amalgamation = rule(
         ),
         "libs": attr.label_list(aspects = [_file_list_aspect]),
         "outs": attr.output_list(),
-    }
+    },
 )
 
+is_bazel = not hasattr(native, "genmpm")
+
+google3_dep_map = {
+    "@absl//absl/base:core_headers": "//third_party/absl/base:core_headers",
+    "@absl//absl/strings": "//third_party/absl/strings",
+    "@com_google_protobuf//:protoc": "//third_party/protobuf:protoc",
+    "@com_google_protobuf//:protobuf": "//third_party/protobuf:protobuf",
+    "@com_google_protobuf//:protoc_lib": "//third_party/protobuf:libprotoc",
+}
+
+def map_dep(dep):
+    if is_bazel:
+        return dep
+    else:
+        return google3_dep_map[dep]
+
 # upb_proto_library() rule
 
 def _remove_up(string):
@@ -223,7 +238,7 @@ def _upb_proto_library_srcs_impl(ctx):
     outs = []
     include_dirs = {}
     for dep in ctx.attr.deps:
-        if hasattr(dep, 'proto'):
+        if hasattr(dep, "proto"):
             for src in dep.proto.transitive_sources:
                 sources.append(src)
                 include_dirs[_remove_suffix(src.path, _remove_up(src.short_path) + "." + src.extension)] = True
@@ -273,3 +288,7 @@ def upb_proto_library(name, deps, upbc):
         deps = [":upb"],
         copts = ["-Ibazel-out/k8-fastbuild/bin"],
     )
+
+def licenses(*args):
+    # No-op (for Google-internal usage).
+    pass
diff --git a/google/protobuf/descriptor.upb.c b/google/protobuf/descriptor.upb.c
index 45664de..25fd1e1 100644
--- a/google/protobuf/descriptor.upb.c
+++ b/google/protobuf/descriptor.upb.c
@@ -36,24 +36,24 @@ static const upb_msglayout *const google_protobuf_FileDescriptorProto_submsgs[6]
 };
 
 static const upb_msglayout_field google_protobuf_FileDescriptorProto__fields[12] = {
-  {1, UPB_SIZE(8, 16), 1, 0, 9, 1},
-  {2, UPB_SIZE(16, 32), 2, 0, 9, 1},
-  {3, UPB_SIZE(40, 80), 0, 0, 9, 3},
-  {4, UPB_SIZE(44, 88), 0, 0, 11, 3},
-  {5, UPB_SIZE(48, 96), 0, 1, 11, 3},
-  {6, UPB_SIZE(52, 104), 0, 4, 11, 3},
-  {7, UPB_SIZE(56, 112), 0, 2, 11, 3},
-  {8, UPB_SIZE(32, 64), 4, 3, 11, 1},
-  {9, UPB_SIZE(36, 72), 5, 5, 11, 1},
-  {10, UPB_SIZE(60, 120), 0, 0, 5, 3},
-  {11, UPB_SIZE(64, 128), 0, 0, 5, 3},
-  {12, UPB_SIZE(24, 48), 3, 0, 9, 1},
+  {1, UPB_SIZE(4, 8), 1, 0, 9, 1},
+  {2, UPB_SIZE(12, 24), 2, 0, 9, 1},
+  {3, UPB_SIZE(36, 72), 0, 0, 9, 3},
+  {4, UPB_SIZE(40, 80), 0, 0, 11, 3},
+  {5, UPB_SIZE(44, 88), 0, 1, 11, 3},
+  {6, UPB_SIZE(48, 96), 0, 4, 11, 3},
+  {7, UPB_SIZE(52, 104), 0, 2, 11, 3},
+  {8, UPB_SIZE(28, 56), 4, 3, 11, 1},
+  {9, UPB_SIZE(32, 64), 5, 5, 11, 1},
+  {10, UPB_SIZE(56, 112), 0, 0, 5, 3},
+  {11, UPB_SIZE(60, 120), 0, 0, 5, 3},
+  {12, UPB_SIZE(20, 40), 3, 0, 9, 1},
 };
 
 const upb_msglayout google_protobuf_FileDescriptorProto_msginit = {
   &google_protobuf_FileDescriptorProto_submsgs[0],
   &google_protobuf_FileDescriptorProto__fields[0],
-  UPB_SIZE(72, 144), 12, false,
+  UPB_SIZE(64, 128), 12, false,
 };
 
 static const upb_msglayout *const google_protobuf_DescriptorProto_submsgs[8] = {
@@ -67,22 +67,22 @@ static const upb_msglayout *const google_protobuf_DescriptorProto_submsgs[8] = {
 };
 
 static const upb_msglayout_field google_protobuf_DescriptorProto__fields[10] = {
-  {1, UPB_SIZE(8, 16), 1, 0, 9, 1},
-  {2, UPB_SIZE(20, 40), 0, 4, 11, 3},
-  {3, UPB_SIZE(24, 48), 0, 0, 11, 3},
-  {4, UPB_SIZE(28, 56), 0, 3, 11, 3},
-  {5, UPB_SIZE(32, 64), 0, 1, 11, 3},
-  {6, UPB_SIZE(36, 72), 0, 4, 11, 3},
-  {7, UPB_SIZE(16, 32), 2, 5, 11, 1},
-  {8, UPB_SIZE(40, 80), 0, 6, 11, 3},
-  {9, UPB_SIZE(44, 88), 0, 2, 11, 3},
-  {10, UPB_SIZE(48, 96), 0, 0, 9, 3},
+  {1, UPB_SIZE(4, 8), 1, 0, 9, 1},
+  {2, UPB_SIZE(16, 32), 0, 4, 11, 3},
+  {3, UPB_SIZE(20, 40), 0, 0, 11, 3},
+  {4, UPB_SIZE(24, 48), 0, 3, 11, 3},
+  {5, UPB_SIZE(28, 56), 0, 1, 11, 3},
+  {6, UPB_SIZE(32, 64), 0, 4, 11, 3},
+  {7, UPB_SIZE(12, 24), 2, 5, 11, 1},
+  {8, UPB_SIZE(36, 72), 0, 6, 11, 3},
+  {9, UPB_SIZE(40, 80), 0, 2, 11, 3},
+  {10, UPB_SIZE(44, 88), 0, 0, 9, 3},
 };
 
 const upb_msglayout google_protobuf_DescriptorProto_msginit = {
   &google_protobuf_DescriptorProto_submsgs[0],
   &google_protobuf_DescriptorProto__fields[0],
-  UPB_SIZE(56, 112), 10, false,
+  UPB_SIZE(48, 96), 10, false,
 };
 
 static const upb_msglayout *const google_protobuf_DescriptorProto_ExtensionRange_submsgs[1] = {
@@ -154,14 +154,14 @@ static const upb_msglayout *const google_protobuf_OneofDescriptorProto_submsgs[1
 };
 
 static const upb_msglayout_field google_protobuf_OneofDescriptorProto__fields[2] = {
-  {1, UPB_SIZE(8, 16), 1, 0, 9, 1},
-  {2, UPB_SIZE(16, 32), 2, 0, 11, 1},
+  {1, UPB_SIZE(4, 8), 1, 0, 9, 1},
+  {2, UPB_SIZE(12, 24), 2, 0, 11, 1},
 };
 
 const upb_msglayout google_protobuf_OneofDescriptorProto_msginit = {
   &google_protobuf_OneofDescriptorProto_submsgs[0],
   &google_protobuf_OneofDescriptorProto__fields[0],
-  UPB_SIZE(24, 48), 2, false,
+  UPB_SIZE(16, 32), 2, false,
 };
 
 static const upb_msglayout *const google_protobuf_EnumDescriptorProto_submsgs[3] = {
@@ -171,11 +171,11 @@ static const upb_msglayout *const google_protobuf_EnumDescriptorProto_submsgs[3]
 };
 
 static const upb_msglayout_field google_protobuf_EnumDescriptorProto__fields[5] = {
-  {1, UPB_SIZE(8, 16), 1, 0, 9, 1},
-  {2, UPB_SIZE(20, 40), 0, 2, 11, 3},
-  {3, UPB_SIZE(16, 32), 2, 1, 11, 1},
-  {4, UPB_SIZE(24, 48), 0, 0, 11, 3},
-  {5, UPB_SIZE(28, 56), 0, 0, 9, 3},
+  {1, UPB_SIZE(4, 8), 1, 0, 9, 1},
+  {2, UPB_SIZE(16, 32), 0, 2, 11, 3},
+  {3, UPB_SIZE(12, 24), 2, 1, 11, 1},
+  {4, UPB_SIZE(20, 40), 0, 0, 11, 3},
+  {5, UPB_SIZE(24, 48), 0, 0, 9, 3},
 };
 
 const upb_msglayout google_protobuf_EnumDescriptorProto_msginit = {
@@ -200,15 +200,15 @@ static const upb_msglayout *const google_protobuf_EnumValueDescriptorProto_subms
 };
 
 static const upb_msglayout_field google_protobuf_EnumValueDescriptorProto__fields[3] = {
-  {1, UPB_SIZE(8, 16), 2, 0, 9, 1},
+  {1, UPB_SIZE(8, 8), 2, 0, 9, 1},
   {2, UPB_SIZE(4, 4), 1, 0, 5, 1},
-  {3, UPB_SIZE(16, 32), 3, 0, 11, 1},
+  {3, UPB_SIZE(16, 24), 3, 0, 11, 1},
 };
 
 const upb_msglayout google_protobuf_EnumValueDescriptorProto_msginit = {
   &google_protobuf_EnumValueDescriptorProto_submsgs[0],
   &google_protobuf_EnumValueDescriptorProto__fields[0],
-  UPB_SIZE(24, 48), 3, false,
+  UPB_SIZE(24, 32), 3, false,
 };
 
 static const upb_msglayout *const google_protobuf_ServiceDescriptorProto_submsgs[2] = {
@@ -217,9 +217,9 @@ static const upb_msglayout *const google_protobuf_ServiceDescriptorProto_submsgs
 };
 
 static const upb_msglayout_field google_protobuf_ServiceDescriptorProto__fields[3] = {
-  {1, UPB_SIZE(8, 16), 1, 0, 9, 1},
-  {2, UPB_SIZE(20, 40), 0, 0, 11, 3},
-  {3, UPB_SIZE(16, 32), 2, 1, 11, 1},
+  {1, UPB_SIZE(4, 8), 1, 0, 9, 1},
+  {2, UPB_SIZE(16, 32), 0, 0, 11, 3},
+  {3, UPB_SIZE(12, 24), 2, 1, 11, 1},
 };
 
 const upb_msglayout google_protobuf_ServiceDescriptorProto_msginit = {
@@ -233,10 +233,10 @@ static const upb_msglayout *const google_protobuf_MethodDescriptorProto_submsgs[
 };
 
 static const upb_msglayout_field google_protobuf_MethodDescriptorProto__fields[6] = {
-  {1, UPB_SIZE(8, 16), 3, 0, 9, 1},
-  {2, UPB_SIZE(16, 32), 4, 0, 9, 1},
-  {3, UPB_SIZE(24, 48), 5, 0, 9, 1},
-  {4, UPB_SIZE(32, 64), 6, 0, 11, 1},
+  {1, UPB_SIZE(4, 8), 3, 0, 9, 1},
+  {2, UPB_SIZE(12, 24), 4, 0, 9, 1},
+  {3, UPB_SIZE(20, 40), 5, 0, 9, 1},
+  {4, UPB_SIZE(28, 56), 6, 0, 11, 1},
   {5, UPB_SIZE(1, 1), 1, 0, 8, 1},
   {6, UPB_SIZE(2, 2), 2, 0, 8, 1},
 };
@@ -244,7 +244,7 @@ static const upb_msglayout_field google_protobuf_MethodDescriptorProto__fields[6
 const upb_msglayout google_protobuf_MethodDescriptorProto_msginit = {
   &google_protobuf_MethodDescriptorProto_submsgs[0],
   &google_protobuf_MethodDescriptorProto__fields[0],
-  UPB_SIZE(40, 80), 6, false,
+  UPB_SIZE(32, 64), 6, false,
 };
 
 static const upb_msglayout *const google_protobuf_FileOptions_submsgs[1] = {
@@ -252,11 +252,11 @@ static const upb_msglayout *const google_protobuf_FileOptions_submsgs[1] = {
 };
 
 static const upb_msglayout_field google_protobuf_FileOptions__fields[19] = {
-  {1, UPB_SIZE(32, 32), 11, 0, 9, 1},
-  {8, UPB_SIZE(40, 48), 12, 0, 9, 1},
+  {1, UPB_SIZE(28, 32), 11, 0, 9, 1},
+  {8, UPB_SIZE(36, 48), 12, 0, 9, 1},
   {9, UPB_SIZE(8, 8), 1, 0, 14, 1},
   {10, UPB_SIZE(16, 16), 2, 0, 8, 1},
-  {11, UPB_SIZE(48, 64), 13, 0, 9, 1},
+  {11, UPB_SIZE(44, 64), 13, 0, 9, 1},
   {16, UPB_SIZE(17, 17), 3, 0, 8, 1},
   {17, UPB_SIZE(18, 18), 4, 0, 8, 1},
   {18, UPB_SIZE(19, 19), 5, 0, 8, 1},
@@ -264,19 +264,19 @@ static const upb_msglayout_field google_protobuf_FileOptions__fields[19] = {
   {23, UPB_SIZE(21, 21), 7, 0, 8, 1},
   {27, UPB_SIZE(22, 22), 8, 0, 8, 1},
   {31, UPB_SIZE(23, 23), 9, 0, 8, 1},
-  {36, UPB_SIZE(56, 80), 14, 0, 9, 1},
-  {37, UPB_SIZE(64, 96), 15, 0, 9, 1},
-  {39, UPB_SIZE(72, 112), 16, 0, 9, 1},
-  {40, UPB_SIZE(80, 128), 17, 0, 9, 1},
-  {41, UPB_SIZE(88, 144), 18, 0, 9, 1},
+  {36, UPB_SIZE(52, 80), 14, 0, 9, 1},
+  {37, UPB_SIZE(60, 96), 15, 0, 9, 1},
+  {39, UPB_SIZE(68, 112), 16, 0, 9, 1},
+  {40, UPB_SIZE(76, 128), 17, 0, 9, 1},
+  {41, UPB_SIZE(84, 144), 18, 0, 9, 1},
   {42, UPB_SIZE(24, 24), 10, 0, 8, 1},
-  {999, UPB_SIZE(96, 160), 0, 0, 11, 3},
+  {999, UPB_SIZE(92, 160), 0, 0, 11, 3},
 };
 
 const upb_msglayout google_protobuf_FileOptions_msginit = {
   &google_protobuf_FileOptions_submsgs[0],
   &google_protobuf_FileOptions__fields[0],
-  UPB_SIZE(104, 176), 19, false,
+  UPB_SIZE(96, 176), 19, false,
 };
 
 static const upb_msglayout *const google_protobuf_MessageOptions_submsgs[1] = {
@@ -414,7 +414,7 @@ const upb_msglayout google_protobuf_UninterpretedOption_msginit = {
 };
 
 static const upb_msglayout_field google_protobuf_UninterpretedOption_NamePart__fields[2] = {
-  {1, UPB_SIZE(8, 16), 2, 0, 9, 2},
+  {1, UPB_SIZE(4, 8), 2, 0, 9, 2},
   {2, UPB_SIZE(1, 1), 1, 0, 8, 2},
 };
 
@@ -439,17 +439,17 @@ const upb_msglayout google_protobuf_SourceCodeInfo_msginit = {
 };
 
 static const upb_msglayout_field google_protobuf_SourceCodeInfo_Location__fields[5] = {
-  {1, UPB_SIZE(24, 48), 0, 0, 5, 3},
-  {2, UPB_SIZE(28, 56), 0, 0, 5, 3},
-  {3, UPB_SIZE(8, 16), 1, 0, 9, 1},
-  {4, UPB_SIZE(16, 32), 2, 0, 9, 1},
-  {6, UPB_SIZE(32, 64), 0, 0, 9, 3},
+  {1, UPB_SIZE(20, 40), 0, 0, 5, 3},
+  {2, UPB_SIZE(24, 48), 0, 0, 5, 3},
+  {3, UPB_SIZE(4, 8), 1, 0, 9, 1},
+  {4, UPB_SIZE(12, 24), 2, 0, 9, 1},
+  {6, UPB_SIZE(28, 56), 0, 0, 9, 3},
 };
 
 const upb_msglayout google_protobuf_SourceCodeInfo_Location_msginit = {
   NULL,
   &google_protobuf_SourceCodeInfo_Location__fields[0],
-  UPB_SIZE(40, 80), 5, false,
+  UPB_SIZE(32, 64), 5, false,
 };
 
 static const upb_msglayout *const google_protobuf_GeneratedCodeInfo_submsgs[1] = {
@@ -467,8 +467,8 @@ const upb_msglayout google_protobuf_GeneratedCodeInfo_msginit = {
 };
 
 static const upb_msglayout_field google_protobuf_GeneratedCodeInfo_Annotation__fields[4] = {
-  {1, UPB_SIZE(24, 32), 0, 0, 5, 3},
-  {2, UPB_SIZE(16, 16), 3, 0, 9, 1},
+  {1, UPB_SIZE(20, 32), 0, 0, 5, 3},
+  {2, UPB_SIZE(12, 16), 3, 0, 9, 1},
   {3, UPB_SIZE(4, 4), 1, 0, 5, 1},
   {4, UPB_SIZE(8, 8), 2, 0, 5, 1},
 };
@@ -476,7 +476,7 @@ static const upb_msglayout_field google_protobuf_GeneratedCodeInfo_Annotation__f
 const upb_msglayout google_protobuf_GeneratedCodeInfo_Annotation_msginit = {
   NULL,
   &google_protobuf_GeneratedCodeInfo_Annotation__fields[0],
-  UPB_SIZE(32, 48), 4, false,
+  UPB_SIZE(24, 48), 4, false,
 };
 
 #include "upb/port_undef.inc"
diff --git a/google/protobuf/descriptor.upb.h b/google/protobuf/descriptor.upb.h
index 6289095..5fcc62a 100644
--- a/google/protobuf/descriptor.upb.h
+++ b/google/protobuf/descriptor.upb.h
@@ -9,6 +9,8 @@
 #ifndef GOOGLE_PROTOBUF_DESCRIPTOR_PROTO_UPB_H_
 #define GOOGLE_PROTOBUF_DESCRIPTOR_PROTO_UPB_H_
 
+#include "upb/generated_util.h"
+
 #include "upb/msg.h"
 
 #include "upb/decode.h"
@@ -70,6 +72,33 @@ typedef struct google_protobuf_SourceCodeInfo google_protobuf_SourceCodeInfo;
 typedef struct google_protobuf_SourceCodeInfo_Location google_protobuf_SourceCodeInfo_Location;
 typedef struct google_protobuf_GeneratedCodeInfo google_protobuf_GeneratedCodeInfo;
 typedef struct google_protobuf_GeneratedCodeInfo_Annotation google_protobuf_GeneratedCodeInfo_Annotation;
+extern const upb_msglayout google_protobuf_FileDescriptorSet_msginit;
+extern const upb_msglayout google_protobuf_FileDescriptorProto_msginit;
+extern const upb_msglayout google_protobuf_DescriptorProto_msginit;
+extern const upb_msglayout google_protobuf_DescriptorProto_ExtensionRange_msginit;
+extern const upb_msglayout google_protobuf_DescriptorProto_ReservedRange_msginit;
+extern const upb_msglayout google_protobuf_ExtensionRangeOptions_msginit;
+extern const upb_msglayout google_protobuf_FieldDescriptorProto_msginit;
+extern const upb_msglayout google_protobuf_OneofDescriptorProto_msginit;
+extern const upb_msglayout google_protobuf_EnumDescriptorProto_msginit;
+extern const upb_msglayout google_protobuf_EnumDescriptorProto_EnumReservedRange_msginit;
+extern const upb_msglayout google_protobuf_EnumValueDescriptorProto_msginit;
+extern const upb_msglayout google_protobuf_ServiceDescriptorProto_msginit;
+extern const upb_msglayout google_protobuf_MethodDescriptorProto_msginit;
+extern const upb_msglayout google_protobuf_FileOptions_msginit;
+extern const upb_msglayout google_protobuf_MessageOptions_msginit;
+extern const upb_msglayout google_protobuf_FieldOptions_msginit;
+extern const upb_msglayout google_protobuf_OneofOptions_msginit;
+extern const upb_msglayout google_protobuf_EnumOptions_msginit;
+extern const upb_msglayout google_protobuf_EnumValueOptions_msginit;
+extern const upb_msglayout google_protobuf_ServiceOptions_msginit;
+extern const upb_msglayout google_protobuf_MethodOptions_msginit;
+extern const upb_msglayout google_protobuf_UninterpretedOption_msginit;
+extern const upb_msglayout google_protobuf_UninterpretedOption_NamePart_msginit;
+extern const upb_msglayout google_protobuf_SourceCodeInfo_msginit;
+extern const upb_msglayout google_protobuf_SourceCodeInfo_Location_msginit;
+extern const upb_msglayout google_protobuf_GeneratedCodeInfo_msginit;
+extern const upb_msglayout google_protobuf_GeneratedCodeInfo_Annotation_msginit;
 
 /* Enums */
 
@@ -126,11 +155,10 @@ typedef enum {
 
 /* google.protobuf.FileDescriptorSet */
 
-extern const upb_msglayout google_protobuf_FileDescriptorSet_msginit;
 UPB_INLINE google_protobuf_FileDescriptorSet *google_protobuf_FileDescriptorSet_new(upb_arena *arena) {
   return (google_protobuf_FileDescriptorSet *)upb_msg_new(&google_protobuf_FileDescriptorSet_msginit, arena);
 }
-UPB_INLINE google_protobuf_FileDescriptorSet *google_protobuf_FileDescriptorSet_parsenew(upb_stringview buf, upb_arena *arena) {
+UPB_INLINE google_protobuf_FileDescriptorSet *google_protobuf_FileDescriptorSet_parsenew(upb_strview buf, upb_arena *arena) {
   google_protobuf_FileDescriptorSet *ret = google_protobuf_FileDescriptorSet_new(arena);
   return (ret && upb_decode(buf, ret, &google_protobuf_FileDescriptorSet_msginit)) ? ret : NULL;
 }
@@ -138,18 +166,29 @@ UPB_INLINE char *google_protobuf_FileDescriptorSet_serialize(const google_protob
   return upb_encode(msg, &google_protobuf_FileDescriptorSet_msginit, arena, len);
 }
 
-UPB_INLINE const upb_array* google_protobuf_FileDescriptorSet_file(const google_protobuf_FileDescriptorSet *msg) { return UPB_FIELD_AT(msg, const upb_array*, UPB_SIZE(0, 0)); }
+UPB_INLINE const google_protobuf_FileDescriptorProto* const* google_protobuf_FileDescriptorSet_file(const google_protobuf_FileDescriptorSet *msg, size_t *len) { return (const google_protobuf_FileDescriptorProto* const*)_upb_array_accessor(msg, UPB_SIZE(0, 0), len); }
 
-UPB_INLINE void google_protobuf_FileDescriptorSet_set_file(google_protobuf_FileDescriptorSet *msg, upb_array* value) { UPB_FIELD_AT(msg, upb_array*, UPB_SIZE(0, 0)) = value; }
+UPB_INLINE google_protobuf_FileDescriptorProto** google_protobuf_FileDescriptorSet_mutable_file(google_protobuf_FileDescriptorSet *msg, size_t *len) {
+  return (google_protobuf_FileDescriptorProto**)_upb_array_mutable_accessor(msg, UPB_SIZE(0, 0), len);
+}
+UPB_INLINE google_protobuf_FileDescriptorProto** google_protobuf_FileDescriptorSet_resize_file(google_protobuf_FileDescriptorSet *msg, size_t len, upb_arena *arena) {
+  return (google_protobuf_FileDescriptorProto**)_upb_array_resize_accessor(msg, UPB_SIZE(0, 0), len, UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, arena);
+}
+UPB_INLINE struct google_protobuf_FileDescriptorProto* google_protobuf_FileDescriptorSet_add_file(google_protobuf_FileDescriptorSet *msg, upb_arena *arena) {
+  struct google_protobuf_FileDescriptorProto* sub = (struct google_protobuf_FileDescriptorProto*)upb_msg_new(&google_protobuf_FileDescriptorProto_msginit, arena);
+  bool ok = _upb_array_append_accessor(
+      msg, UPB_SIZE(0, 0), UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, &sub, arena);
+  if (!ok) return NULL;
+  return sub;
+}
 
 
 /* google.protobuf.FileDescriptorProto */
 
-extern const upb_msglayout google_protobuf_FileDescriptorProto_msginit;
 UPB_INLINE google_protobuf_FileDescriptorProto *google_protobuf_FileDescriptorProto_new(upb_arena *arena) {
   return (google_protobuf_FileDescriptorProto *)upb_msg_new(&google_protobuf_FileDescriptorProto_msginit, arena);
 }
-UPB_INLINE google_protobuf_FileDescriptorProto *google_protobuf_FileDescriptorProto_parsenew(upb_stringview buf, upb_arena *arena) {
+UPB_INLINE google_protobuf_FileDescriptorProto *google_protobuf_FileDescriptorProto_parsenew(upb_strview buf, upb_arena *arena) {
   google_protobuf_FileDescriptorProto *ret = google_protobuf_FileDescriptorProto_new(arena);
   return (ret && upb_decode(buf, ret, &google_protobuf_FileDescriptorProto_msginit)) ? ret : NULL;
 }
@@ -157,40 +196,152 @@ UPB_INLINE char *google_protobuf_FileDescriptorProto_serialize(const google_prot
   return upb_encode(msg, &google_protobuf_FileDescriptorProto_msginit, arena, len);
 }
 
-UPB_INLINE upb_stringview google_protobuf_FileDescriptorProto_name(const google_protobuf_FileDescriptorProto *msg) { return UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(8, 16)); }
-UPB_INLINE upb_stringview google_protobuf_FileDescriptorProto_package(const google_protobuf_FileDescriptorProto *msg) { return UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(16, 32)); }
-UPB_INLINE const upb_array* google_protobuf_FileDescriptorProto_dependency(const google_protobuf_FileDescriptorProto *msg) { return UPB_FIELD_AT(msg, const upb_array*, UPB_SIZE(40, 80)); }
-UPB_INLINE const upb_array* google_protobuf_FileDescriptorProto_message_type(const google_protobuf_FileDescriptorProto *msg) { return UPB_FIELD_AT(msg, const upb_array*, UPB_SIZE(44, 88)); }
-UPB_INLINE const upb_array* google_protobuf_FileDescriptorProto_enum_type(const google_protobuf_FileDescriptorProto *msg) { return UPB_FIELD_AT(msg, const upb_array*, UPB_SIZE(48, 96)); }
-UPB_INLINE const upb_array* google_protobuf_FileDescriptorProto_service(const google_protobuf_FileDescriptorProto *msg) { return UPB_FIELD_AT(msg, const upb_array*, UPB_SIZE(52, 104)); }
-UPB_INLINE const upb_array* google_protobuf_FileDescriptorProto_extension(const google_protobuf_FileDescriptorProto *msg) { return UPB_FIELD_AT(msg, const upb_array*, UPB_SIZE(56, 112)); }
-UPB_INLINE const google_protobuf_FileOptions* google_protobuf_FileDescriptorProto_options(const google_protobuf_FileDescriptorProto *msg) { return UPB_FIELD_AT(msg, const google_protobuf_FileOptions*, UPB_SIZE(32, 64)); }
-UPB_INLINE const google_protobuf_SourceCodeInfo* google_protobuf_FileDescriptorProto_source_code_info(const google_protobuf_FileDescriptorProto *msg) { return UPB_FIELD_AT(msg, const google_protobuf_SourceCodeInfo*, UPB_SIZE(36, 72)); }
-UPB_INLINE const upb_array* google_protobuf_FileDescriptorProto_public_dependency(const google_protobuf_FileDescriptorProto *msg) { return UPB_FIELD_AT(msg, const upb_array*, UPB_SIZE(60, 120)); }
-UPB_INLINE const upb_array* google_protobuf_FileDescriptorProto_weak_dependency(const google_protobuf_FileDescriptorProto *msg) { return UPB_FIELD_AT(msg, const upb_array*, UPB_SIZE(64, 128)); }
-UPB_INLINE upb_stringview google_protobuf_FileDescriptorProto_syntax(const google_protobuf_FileDescriptorProto *msg) { return UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(24, 48)); }
-
-UPB_INLINE void google_protobuf_FileDescriptorProto_set_name(google_protobuf_FileDescriptorProto *msg, upb_stringview value) { UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(8, 16)) = value; }
-UPB_INLINE void google_protobuf_FileDescriptorProto_set_package(google_protobuf_FileDescriptorProto *msg, upb_stringview value) { UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(16, 32)) = value; }
-UPB_INLINE void google_protobuf_FileDescriptorProto_set_dependency(google_protobuf_FileDescriptorProto *msg, upb_array* value) { UPB_FIELD_AT(msg, upb_array*, UPB_SIZE(40, 80)) = value; }
-UPB_INLINE void google_protobuf_FileDescriptorProto_set_message_type(google_protobuf_FileDescriptorProto *msg, upb_array* value) { UPB_FIELD_AT(msg, upb_array*, UPB_SIZE(44, 88)) = value; }
-UPB_INLINE void google_protobuf_FileDescriptorProto_set_enum_type(google_protobuf_FileDescriptorProto *msg, upb_array* value) { UPB_FIELD_AT(msg, upb_array*, UPB_SIZE(48, 96)) = value; }
-UPB_INLINE void google_protobuf_FileDescriptorProto_set_service(google_protobuf_FileDescriptorProto *msg, upb_array* value) { UPB_FIELD_AT(msg, upb_array*, UPB_SIZE(52, 104)) = value; }
-UPB_INLINE void google_protobuf_FileDescriptorProto_set_extension(google_protobuf_FileDescriptorProto *msg, upb_array* value) { UPB_FIELD_AT(msg, upb_array*, UPB_SIZE(56, 112)) = value; }
-UPB_INLINE void google_protobuf_FileDescriptorProto_set_options(google_protobuf_FileDescriptorProto *msg, google_protobuf_FileOptions* value) { UPB_FIELD_AT(msg, google_protobuf_FileOptions*, UPB_SIZE(32, 64)) = value; }
-UPB_INLINE void google_protobuf_FileDescriptorProto_set_source_code_info(google_protobuf_FileDescriptorProto *msg, google_protobuf_SourceCodeInfo* value) { UPB_FIELD_AT(msg, google_protobuf_SourceCodeInfo*, UPB_SIZE(36, 72)) = value; }
-UPB_INLINE void google_protobuf_FileDescriptorProto_set_public_dependency(google_protobuf_FileDescriptorProto *msg, upb_array* value) { UPB_FIELD_AT(msg, upb_array*, UPB_SIZE(60, 120)) = value; }
-UPB_INLINE void google_protobuf_FileDescriptorProto_set_weak_dependency(google_protobuf_FileDescriptorProto *msg, upb_array* value) { UPB_FIELD_AT(msg, upb_array*, UPB_SIZE(64, 128)) = value; }
-UPB_INLINE void google_protobuf_FileDescriptorProto_set_syntax(google_protobuf_FileDescriptorProto *msg, upb_stringview value) { UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(24, 48)) = value; }
+UPB_INLINE bool google_protobuf_FileDescriptorProto_has_name(const google_protobuf_FileDescriptorProto *msg) { return _upb_has_field(msg, 0); }
+UPB_INLINE upb_strview google_protobuf_FileDescriptorProto_name(const google_protobuf_FileDescriptorProto *msg) { return UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(4, 8)); }
+UPB_INLINE bool google_protobuf_FileDescriptorProto_has_package(const google_protobuf_FileDescriptorProto *msg) { return _upb_has_field(msg, 1); }
+UPB_INLINE upb_strview google_protobuf_FileDescriptorProto_package(const google_protobuf_FileDescriptorProto *msg) { return UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(12, 24)); }
+UPB_INLINE upb_strview const* google_protobuf_FileDescriptorProto_dependency(const google_protobuf_FileDescriptorProto *msg, size_t *len) { return (upb_strview const*)_upb_array_accessor(msg, UPB_SIZE(36, 72), len); }
+UPB_INLINE const google_protobuf_DescriptorProto* const* google_protobuf_FileDescriptorProto_message_type(const google_protobuf_FileDescriptorProto *msg, size_t *len) { return (const google_protobuf_DescriptorProto* const*)_upb_array_accessor(msg, UPB_SIZE(40, 80), len); }
+UPB_INLINE const google_protobuf_EnumDescriptorProto* const* google_protobuf_FileDescriptorProto_enum_type(const google_protobuf_FileDescriptorProto *msg, size_t *len) { return (const google_protobuf_EnumDescriptorProto* const*)_upb_array_accessor(msg, UPB_SIZE(44, 88), len); }
+UPB_INLINE const google_protobuf_ServiceDescriptorProto* const* google_protobuf_FileDescriptorProto_service(const google_protobuf_FileDescriptorProto *msg, size_t *len) { return (const google_protobuf_ServiceDescriptorProto* const*)_upb_array_accessor(msg, UPB_SIZE(48, 96), len); }
+UPB_INLINE const google_protobuf_FieldDescriptorProto* const* google_protobuf_FileDescriptorProto_extension(const google_protobuf_FileDescriptorProto *msg, size_t *len) { return (const google_protobuf_FieldDescriptorProto* const*)_upb_array_accessor(msg, UPB_SIZE(52, 104), len); }
+UPB_INLINE bool google_protobuf_FileDescriptorProto_has_options(const google_protobuf_FileDescriptorProto *msg) { return _upb_has_field(msg, 3); }
+UPB_INLINE const google_protobuf_FileOptions* google_protobuf_FileDescriptorProto_options(const google_protobuf_FileDescriptorProto *msg) { return UPB_FIELD_AT(msg, const google_protobuf_FileOptions*, UPB_SIZE(28, 56)); }
+UPB_INLINE bool google_protobuf_FileDescriptorProto_has_source_code_info(const google_protobuf_FileDescriptorProto *msg) { return _upb_has_field(msg, 4); }
+UPB_INLINE const google_protobuf_SourceCodeInfo* google_protobuf_FileDescriptorProto_source_code_info(const google_protobuf_FileDescriptorProto *msg) { return UPB_FIELD_AT(msg, const google_protobuf_SourceCodeInfo*, UPB_SIZE(32, 64)); }
+UPB_INLINE int32_t const* google_protobuf_FileDescriptorProto_public_dependency(const google_protobuf_FileDescriptorProto *msg, size_t *len) { return (int32_t const*)_upb_array_accessor(msg, UPB_SIZE(56, 112), len); }
+UPB_INLINE int32_t const* google_protobuf_FileDescriptorProto_weak_dependency(const google_protobuf_FileDescriptorProto *msg, size_t *len) { return (int32_t const*)_upb_array_accessor(msg, UPB_SIZE(60, 120), len); }
+UPB_INLINE bool google_protobuf_FileDescriptorProto_has_syntax(const google_protobuf_FileDescriptorProto *msg) { return _upb_has_field(msg, 2); }
+UPB_INLINE upb_strview google_protobuf_FileDescriptorProto_syntax(const google_protobuf_FileDescriptorProto *msg) { return UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(20, 40)); }
+
+UPB_INLINE void google_protobuf_FileDescriptorProto_set_name(google_protobuf_FileDescriptorProto *msg, upb_strview value) {
+  _upb_sethas(msg, 0);
+  UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(4, 8)) = value;
+}
+UPB_INLINE void google_protobuf_FileDescriptorProto_set_package(google_protobuf_FileDescriptorProto *msg, upb_strview value) {
+  _upb_sethas(msg, 1);
+  UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(12, 24)) = value;
+}
+UPB_INLINE upb_strview* google_protobuf_FileDescriptorProto_mutable_dependency(google_protobuf_FileDescriptorProto *msg, size_t *len) {
+  return (upb_strview*)_upb_array_mutable_accessor(msg, UPB_SIZE(36, 72), len);
+}
+UPB_INLINE upb_strview* google_protobuf_FileDescriptorProto_resize_dependency(google_protobuf_FileDescriptorProto *msg, size_t len, upb_arena *arena) {
+  return (upb_strview*)_upb_array_resize_accessor(msg, UPB_SIZE(36, 72), len, UPB_SIZE(8, 16), UPB_TYPE_STRING, arena);
+}
+UPB_INLINE bool google_protobuf_FileDescriptorProto_add_dependency(google_protobuf_FileDescriptorProto *msg, upb_strview val, upb_arena *arena) {
+  return _upb_array_append_accessor(
+      msg, UPB_SIZE(36, 72), UPB_SIZE(8, 16), UPB_TYPE_STRING, &val, arena);
+}
+UPB_INLINE google_protobuf_DescriptorProto** google_protobuf_FileDescriptorProto_mutable_message_type(google_protobuf_FileDescriptorProto *msg, size_t *len) {
+  return (google_protobuf_DescriptorProto**)_upb_array_mutable_accessor(msg, UPB_SIZE(40, 80), len);
+}
+UPB_INLINE google_protobuf_DescriptorProto** google_protobuf_FileDescriptorProto_resize_message_type(google_protobuf_FileDescriptorProto *msg, size_t len, upb_arena *arena) {
+  return (google_protobuf_DescriptorProto**)_upb_array_resize_accessor(msg, UPB_SIZE(40, 80), len, UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, arena);
+}
+UPB_INLINE struct google_protobuf_DescriptorProto* google_protobuf_FileDescriptorProto_add_message_type(google_protobuf_FileDescriptorProto *msg, upb_arena *arena) {
+  struct google_protobuf_DescriptorProto* sub = (struct google_protobuf_DescriptorProto*)upb_msg_new(&google_protobuf_DescriptorProto_msginit, arena);
+  bool ok = _upb_array_append_accessor(
+      msg, UPB_SIZE(40, 80), UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, &sub, arena);
+  if (!ok) return NULL;
+  return sub;
+}
+UPB_INLINE google_protobuf_EnumDescriptorProto** google_protobuf_FileDescriptorProto_mutable_enum_type(google_protobuf_FileDescriptorProto *msg, size_t *len) {
+  return (google_protobuf_EnumDescriptorProto**)_upb_array_mutable_accessor(msg, UPB_SIZE(44, 88), len);
+}
+UPB_INLINE google_protobuf_EnumDescriptorProto** google_protobuf_FileDescriptorProto_resize_enum_type(google_protobuf_FileDescriptorProto *msg, size_t len, upb_arena *arena) {
+  return (google_protobuf_EnumDescriptorProto**)_upb_array_resize_accessor(msg, UPB_SIZE(44, 88), len, UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, arena);
+}
+UPB_INLINE struct google_protobuf_EnumDescriptorProto* google_protobuf_FileDescriptorProto_add_enum_type(google_protobuf_FileDescriptorProto *msg, upb_arena *arena) {
+  struct google_protobuf_EnumDescriptorProto* sub = (struct google_protobuf_EnumDescriptorProto*)upb_msg_new(&google_protobuf_EnumDescriptorProto_msginit, arena);
+  bool ok = _upb_array_append_accessor(
+      msg, UPB_SIZE(44, 88), UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, &sub, arena);
+  if (!ok) return NULL;
+  return sub;
+}
+UPB_INLINE google_protobuf_ServiceDescriptorProto** google_protobuf_FileDescriptorProto_mutable_service(google_protobuf_FileDescriptorProto *msg, size_t *len) {
+  return (google_protobuf_ServiceDescriptorProto**)_upb_array_mutable_accessor(msg, UPB_SIZE(48, 96), len);
+}
+UPB_INLINE google_protobuf_ServiceDescriptorProto** google_protobuf_FileDescriptorProto_resize_service(google_protobuf_FileDescriptorProto *msg, size_t len, upb_arena *arena) {
+  return (google_protobuf_ServiceDescriptorProto**)_upb_array_resize_accessor(msg, UPB_SIZE(48, 96), len, UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, arena);
+}
+UPB_INLINE struct google_protobuf_ServiceDescriptorProto* google_protobuf_FileDescriptorProto_add_service(google_protobuf_FileDescriptorProto *msg, upb_arena *arena) {
+  struct google_protobuf_ServiceDescriptorProto* sub = (struct google_protobuf_ServiceDescriptorProto*)upb_msg_new(&google_protobuf_ServiceDescriptorProto_msginit, arena);
+  bool ok = _upb_array_append_accessor(
+      msg, UPB_SIZE(48, 96), UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, &sub, arena);
+  if (!ok) return NULL;
+  return sub;
+}
+UPB_INLINE google_protobuf_FieldDescriptorProto** google_protobuf_FileDescriptorProto_mutable_extension(google_protobuf_FileDescriptorProto *msg, size_t *len) {
+  return (google_protobuf_FieldDescriptorProto**)_upb_array_mutable_accessor(msg, UPB_SIZE(52, 104), len);
+}
+UPB_INLINE google_protobuf_FieldDescriptorProto** google_protobuf_FileDescriptorProto_resize_extension(google_protobuf_FileDescriptorProto *msg, size_t len, upb_arena *arena) {
+  return (google_protobuf_FieldDescriptorProto**)_upb_array_resize_accessor(msg, UPB_SIZE(52, 104), len, UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, arena);
+}
+UPB_INLINE struct google_protobuf_FieldDescriptorProto* google_protobuf_FileDescriptorProto_add_extension(google_protobuf_FileDescriptorProto *msg, upb_arena *arena) {
+  struct google_protobuf_FieldDescriptorProto* sub = (struct google_protobuf_FieldDescriptorProto*)upb_msg_new(&google_protobuf_FieldDescriptorProto_msginit, arena);
+  bool ok = _upb_array_append_accessor(
+      msg, UPB_SIZE(52, 104), UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, &sub, arena);
+  if (!ok) return NULL;
+  return sub;
+}
+UPB_INLINE void google_protobuf_FileDescriptorProto_set_options(google_protobuf_FileDescriptorProto *msg, google_protobuf_FileOptions* value) {
+  _upb_sethas(msg, 3);
+  UPB_FIELD_AT(msg, google_protobuf_FileOptions*, UPB_SIZE(28, 56)) = value;
+}
+UPB_INLINE struct google_protobuf_FileOptions* google_protobuf_FileDescriptorProto_mutable_options(google_protobuf_FileDescriptorProto *msg, upb_arena *arena) {
+  struct google_protobuf_FileOptions* sub = (struct google_protobuf_FileOptions*)google_protobuf_FileDescriptorProto_options(msg);
+  if (sub == NULL) {
+    sub = (struct google_protobuf_FileOptions*)upb_msg_new(&google_protobuf_FileOptions_msginit, arena);
+    if (!sub) return NULL;
+    google_protobuf_FileDescriptorProto_set_options(msg, sub);
+  }
+  return sub;
+}
+UPB_INLINE void google_protobuf_FileDescriptorProto_set_source_code_info(google_protobuf_FileDescriptorProto *msg, google_protobuf_SourceCodeInfo* value) {
+  _upb_sethas(msg, 4);
+  UPB_FIELD_AT(msg, google_protobuf_SourceCodeInfo*, UPB_SIZE(32, 64)) = value;
+}
+UPB_INLINE struct google_protobuf_SourceCodeInfo* google_protobuf_FileDescriptorProto_mutable_source_code_info(google_protobuf_FileDescriptorProto *msg, upb_arena *arena) {
+  struct google_protobuf_SourceCodeInfo* sub = (struct google_protobuf_SourceCodeInfo*)google_protobuf_FileDescriptorProto_source_code_info(msg);
+  if (sub == NULL) {
+    sub = (struct google_protobuf_SourceCodeInfo*)upb_msg_new(&google_protobuf_SourceCodeInfo_msginit, arena);
+    if (!sub) return NULL;
+    google_protobuf_FileDescriptorProto_set_source_code_info(msg, sub);
+  }
+  return sub;
+}
+UPB_INLINE int32_t* google_protobuf_FileDescriptorProto_mutable_public_dependency(google_protobuf_FileDescriptorProto *msg, size_t *len) {
+  return (int32_t*)_upb_array_mutable_accessor(msg, UPB_SIZE(56, 112), len);
+}
+UPB_INLINE int32_t* google_protobuf_FileDescriptorProto_resize_public_dependency(google_protobuf_FileDescriptorProto *msg, size_t len, upb_arena *arena) {
+  return (int32_t*)_upb_array_resize_accessor(msg, UPB_SIZE(56, 112), len, UPB_SIZE(4, 4), UPB_TYPE_INT32, arena);
+}
+UPB_INLINE bool google_protobuf_FileDescriptorProto_add_public_dependency(google_protobuf_FileDescriptorProto *msg, int32_t val, upb_arena *arena) {
+  return _upb_array_append_accessor(
+      msg, UPB_SIZE(56, 112), UPB_SIZE(4, 4), UPB_TYPE_INT32, &val, arena);
+}
+UPB_INLINE int32_t* google_protobuf_FileDescriptorProto_mutable_weak_dependency(google_protobuf_FileDescriptorProto *msg, size_t *len) {
+  return (int32_t*)_upb_array_mutable_accessor(msg, UPB_SIZE(60, 120), len);
+}
+UPB_INLINE int32_t* google_protobuf_FileDescriptorProto_resize_weak_dependency(google_protobuf_FileDescriptorProto *msg, size_t len, upb_arena *arena) {
+  return (int32_t*)_upb_array_resize_accessor(msg, UPB_SIZE(60, 120), len, UPB_SIZE(4, 4), UPB_TYPE_INT32, arena);
+}
+UPB_INLINE bool google_protobuf_FileDescriptorProto_add_weak_dependency(google_protobuf_FileDescriptorProto *msg, int32_t val, upb_arena *arena) {
+  return _upb_array_append_accessor(
+      msg, UPB_SIZE(60, 120), UPB_SIZE(4, 4), UPB_TYPE_INT32, &val, arena);
+}
+UPB_INLINE void google_protobuf_FileDescriptorProto_set_syntax(google_protobuf_FileDescriptorProto *msg, upb_strview value) {
+  _upb_sethas(msg, 2);
+  UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(20, 40)) = value;
+}
 
 
 /* google.protobuf.DescriptorProto */
 
-extern const upb_msglayout google_protobuf_DescriptorProto_msginit;
 UPB_INLINE google_protobuf_DescriptorProto *google_protobuf_DescriptorProto_new(upb_arena *arena) {
   return (google_protobuf_DescriptorProto *)upb_msg_new(&google_protobuf_DescriptorProto_msginit, arena);
 }
-UPB_INLINE google_protobuf_DescriptorProto *google_protobuf_DescriptorProto_parsenew(upb_stringview buf, upb_arena *arena) {
+UPB_INLINE google_protobuf_DescriptorProto *google_protobuf_DescriptorProto_parsenew(upb_strview buf, upb_arena *arena) {
   google_protobuf_DescriptorProto *ret = google_protobuf_DescriptorProto_new(arena);
   return (ret && upb_decode(buf, ret, &google_protobuf_DescriptorProto_msginit)) ? ret : NULL;
 }
@@ -198,36 +349,145 @@ UPB_INLINE char *google_protobuf_DescriptorProto_serialize(const google_protobuf
   return upb_encode(msg, &google_protobuf_DescriptorProto_msginit, arena, len);
 }
 
-UPB_INLINE upb_stringview google_protobuf_DescriptorProto_name(const google_protobuf_DescriptorProto *msg) { return UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(8, 16)); }
-UPB_INLINE const upb_array* google_protobuf_DescriptorProto_field(const google_protobuf_DescriptorProto *msg) { return UPB_FIELD_AT(msg, const upb_array*, UPB_SIZE(20, 40)); }
-UPB_INLINE const upb_array* google_protobuf_DescriptorProto_nested_type(const google_protobuf_DescriptorProto *msg) { return UPB_FIELD_AT(msg, const upb_array*, UPB_SIZE(24, 48)); }
-UPB_INLINE const upb_array* google_protobuf_DescriptorProto_enum_type(const google_protobuf_DescriptorProto *msg) { return UPB_FIELD_AT(msg, const upb_array*, UPB_SIZE(28, 56)); }
-UPB_INLINE const upb_array* google_protobuf_DescriptorProto_extension_range(const google_protobuf_DescriptorProto *msg) { return UPB_FIELD_AT(msg, const upb_array*, UPB_SIZE(32, 64)); }
-UPB_INLINE const upb_array* google_protobuf_DescriptorProto_extension(const google_protobuf_DescriptorProto *msg) { return UPB_FIELD_AT(msg, const upb_array*, UPB_SIZE(36, 72)); }
-UPB_INLINE const google_protobuf_MessageOptions* google_protobuf_DescriptorProto_options(const google_protobuf_DescriptorProto *msg) { return UPB_FIELD_AT(msg, const google_protobuf_MessageOptions*, UPB_SIZE(16, 32)); }
-UPB_INLINE const upb_array* google_protobuf_DescriptorProto_oneof_decl(const google_protobuf_DescriptorProto *msg) { return UPB_FIELD_AT(msg, const upb_array*, UPB_SIZE(40, 80)); }
-UPB_INLINE const upb_array* google_protobuf_DescriptorProto_reserved_range(const google_protobuf_DescriptorProto *msg) { return UPB_FIELD_AT(msg, const upb_array*, UPB_SIZE(44, 88)); }
-UPB_INLINE const upb_array* google_protobuf_DescriptorProto_reserved_name(const google_protobuf_DescriptorProto *msg) { return UPB_FIELD_AT(msg, const upb_array*, UPB_SIZE(48, 96)); }
-
-UPB_INLINE void google_protobuf_DescriptorProto_set_name(google_protobuf_DescriptorProto *msg, upb_stringview value) { UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(8, 16)) = value; }
-UPB_INLINE void google_protobuf_DescriptorProto_set_field(google_protobuf_DescriptorProto *msg, upb_array* value) { UPB_FIELD_AT(msg, upb_array*, UPB_SIZE(20, 40)) = value; }
-UPB_INLINE void google_protobuf_DescriptorProto_set_nested_type(google_protobuf_DescriptorProto *msg, upb_array* value) { UPB_FIELD_AT(msg, upb_array*, UPB_SIZE(24, 48)) = value; }
-UPB_INLINE void google_protobuf_DescriptorProto_set_enum_type(google_protobuf_DescriptorProto *msg, upb_array* value) { UPB_FIELD_AT(msg, upb_array*, UPB_SIZE(28, 56)) = value; }
-UPB_INLINE void google_protobuf_DescriptorProto_set_extension_range(google_protobuf_DescriptorProto *msg, upb_array* value) { UPB_FIELD_AT(msg, upb_array*, UPB_SIZE(32, 64)) = value; }
-UPB_INLINE void google_protobuf_DescriptorProto_set_extension(google_protobuf_DescriptorProto *msg, upb_array* value) { UPB_FIELD_AT(msg, upb_array*, UPB_SIZE(36, 72)) = value; }
-UPB_INLINE void google_protobuf_DescriptorProto_set_options(google_protobuf_DescriptorProto *msg, google_protobuf_MessageOptions* value) { UPB_FIELD_AT(msg, google_protobuf_MessageOptions*, UPB_SIZE(16, 32)) = value; }
-UPB_INLINE void google_protobuf_DescriptorProto_set_oneof_decl(google_protobuf_DescriptorProto *msg, upb_array* value) { UPB_FIELD_AT(msg, upb_array*, UPB_SIZE(40, 80)) = value; }
-UPB_INLINE void google_protobuf_DescriptorProto_set_reserved_range(google_protobuf_DescriptorProto *msg, upb_array* value) { UPB_FIELD_AT(msg, upb_array*, UPB_SIZE(44, 88)) = value; }
-UPB_INLINE void google_protobuf_DescriptorProto_set_reserved_name(google_protobuf_DescriptorProto *msg, upb_array* value) { UPB_FIELD_AT(msg, upb_array*, UPB_SIZE(48, 96)) = value; }
+UPB_INLINE bool google_protobuf_DescriptorProto_has_name(const google_protobuf_DescriptorProto *msg) { return _upb_has_field(msg, 0); }
+UPB_INLINE upb_strview google_protobuf_DescriptorProto_name(const google_protobuf_DescriptorProto *msg) { return UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(4, 8)); }
+UPB_INLINE const google_protobuf_FieldDescriptorProto* const* google_protobuf_DescriptorProto_field(const google_protobuf_DescriptorProto *msg, size_t *len) { return (const google_protobuf_FieldDescriptorProto* const*)_upb_array_accessor(msg, UPB_SIZE(16, 32), len); }
+UPB_INLINE const google_protobuf_DescriptorProto* const* google_protobuf_DescriptorProto_nested_type(const google_protobuf_DescriptorProto *msg, size_t *len) { return (const google_protobuf_DescriptorProto* const*)_upb_array_accessor(msg, UPB_SIZE(20, 40), len); }
+UPB_INLINE const google_protobuf_EnumDescriptorProto* const* google_protobuf_DescriptorProto_enum_type(const google_protobuf_DescriptorProto *msg, size_t *len) { return (const google_protobuf_EnumDescriptorProto* const*)_upb_array_accessor(msg, UPB_SIZE(24, 48), len); }
+UPB_INLINE const google_protobuf_DescriptorProto_ExtensionRange* const* google_protobuf_DescriptorProto_extension_range(const google_protobuf_DescriptorProto *msg, size_t *len) { return (const google_protobuf_DescriptorProto_ExtensionRange* const*)_upb_array_accessor(msg, UPB_SIZE(28, 56), len); }
+UPB_INLINE const google_protobuf_FieldDescriptorProto* const* google_protobuf_DescriptorProto_extension(const google_protobuf_DescriptorProto *msg, size_t *len) { return (const google_protobuf_FieldDescriptorProto* const*)_upb_array_accessor(msg, UPB_SIZE(32, 64), len); }
+UPB_INLINE bool google_protobuf_DescriptorProto_has_options(const google_protobuf_DescriptorProto *msg) { return _upb_has_field(msg, 1); }
+UPB_INLINE const google_protobuf_MessageOptions* google_protobuf_DescriptorProto_options(const google_protobuf_DescriptorProto *msg) { return UPB_FIELD_AT(msg, const google_protobuf_MessageOptions*, UPB_SIZE(12, 24)); }
+UPB_INLINE const google_protobuf_OneofDescriptorProto* const* google_protobuf_DescriptorProto_oneof_decl(const google_protobuf_DescriptorProto *msg, size_t *len) { return (const google_protobuf_OneofDescriptorProto* const*)_upb_array_accessor(msg, UPB_SIZE(36, 72), len); }
+UPB_INLINE const google_protobuf_DescriptorProto_ReservedRange* const* google_protobuf_DescriptorProto_reserved_range(const google_protobuf_DescriptorProto *msg, size_t *len) { return (const google_protobuf_DescriptorProto_ReservedRange* const*)_upb_array_accessor(msg, UPB_SIZE(40, 80), len); }
+UPB_INLINE upb_strview const* google_protobuf_DescriptorProto_reserved_name(const google_protobuf_DescriptorProto *msg, size_t *len) { return (upb_strview const*)_upb_array_accessor(msg, UPB_SIZE(44, 88), len); }
+
+UPB_INLINE void google_protobuf_DescriptorProto_set_name(google_protobuf_DescriptorProto *msg, upb_strview value) {
+  _upb_sethas(msg, 0);
+  UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(4, 8)) = value;
+}
+UPB_INLINE google_protobuf_FieldDescriptorProto** google_protobuf_DescriptorProto_mutable_field(google_protobuf_DescriptorProto *msg, size_t *len) {
+  return (google_protobuf_FieldDescriptorProto**)_upb_array_mutable_accessor(msg, UPB_SIZE(16, 32), len);
+}
+UPB_INLINE google_protobuf_FieldDescriptorProto** google_protobuf_DescriptorProto_resize_field(google_protobuf_DescriptorProto *msg, size_t len, upb_arena *arena) {
+  return (google_protobuf_FieldDescriptorProto**)_upb_array_resize_accessor(msg, UPB_SIZE(16, 32), len, UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, arena);
+}
+UPB_INLINE struct google_protobuf_FieldDescriptorProto* google_protobuf_DescriptorProto_add_field(google_protobuf_DescriptorProto *msg, upb_arena *arena) {
+  struct google_protobuf_FieldDescriptorProto* sub = (struct google_protobuf_FieldDescriptorProto*)upb_msg_new(&google_protobuf_FieldDescriptorProto_msginit, arena);
+  bool ok = _upb_array_append_accessor(
+      msg, UPB_SIZE(16, 32), UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, &sub, arena);
+  if (!ok) return NULL;
+  return sub;
+}
+UPB_INLINE google_protobuf_DescriptorProto** google_protobuf_DescriptorProto_mutable_nested_type(google_protobuf_DescriptorProto *msg, size_t *len) {
+  return (google_protobuf_DescriptorProto**)_upb_array_mutable_accessor(msg, UPB_SIZE(20, 40), len);
+}
+UPB_INLINE google_protobuf_DescriptorProto** google_protobuf_DescriptorProto_resize_nested_type(google_protobuf_DescriptorProto *msg, size_t len, upb_arena *arena) {
+  return (google_protobuf_DescriptorProto**)_upb_array_resize_accessor(msg, UPB_SIZE(20, 40), len, UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, arena);
+}
+UPB_INLINE struct google_protobuf_DescriptorProto* google_protobuf_DescriptorProto_add_nested_type(google_protobuf_DescriptorProto *msg, upb_arena *arena) {
+  struct google_protobuf_DescriptorProto* sub = (struct google_protobuf_DescriptorProto*)upb_msg_new(&google_protobuf_DescriptorProto_msginit, arena);
+  bool ok = _upb_array_append_accessor(
+      msg, UPB_SIZE(20, 40), UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, &sub, arena);
+  if (!ok) return NULL;
+  return sub;
+}
+UPB_INLINE google_protobuf_EnumDescriptorProto** google_protobuf_DescriptorProto_mutable_enum_type(google_protobuf_DescriptorProto *msg, size_t *len) {
+  return (google_protobuf_EnumDescriptorProto**)_upb_array_mutable_accessor(msg, UPB_SIZE(24, 48), len);
+}
+UPB_INLINE google_protobuf_EnumDescriptorProto** google_protobuf_DescriptorProto_resize_enum_type(google_protobuf_DescriptorProto *msg, size_t len, upb_arena *arena) {
+  return (google_protobuf_EnumDescriptorProto**)_upb_array_resize_accessor(msg, UPB_SIZE(24, 48), len, UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, arena);
+}
+UPB_INLINE struct google_protobuf_EnumDescriptorProto* google_protobuf_DescriptorProto_add_enum_type(google_protobuf_DescriptorProto *msg, upb_arena *arena) {
+  struct google_protobuf_EnumDescriptorProto* sub = (struct google_protobuf_EnumDescriptorProto*)upb_msg_new(&google_protobuf_EnumDescriptorProto_msginit, arena);
+  bool ok = _upb_array_append_accessor(
+      msg, UPB_SIZE(24, 48), UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, &sub, arena);
+  if (!ok) return NULL;
+  return sub;
+}
+UPB_INLINE google_protobuf_DescriptorProto_ExtensionRange** google_protobuf_DescriptorProto_mutable_extension_range(google_protobuf_DescriptorProto *msg, size_t *len) {
+  return (google_protobuf_DescriptorProto_ExtensionRange**)_upb_array_mutable_accessor(msg, UPB_SIZE(28, 56), len);
+}
+UPB_INLINE google_protobuf_DescriptorProto_ExtensionRange** google_protobuf_DescriptorProto_resize_extension_range(google_protobuf_DescriptorProto *msg, size_t len, upb_arena *arena) {
+  return (google_protobuf_DescriptorProto_ExtensionRange**)_upb_array_resize_accessor(msg, UPB_SIZE(28, 56), len, UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, arena);
+}
+UPB_INLINE struct google_protobuf_DescriptorProto_ExtensionRange* google_protobuf_DescriptorProto_add_extension_range(google_protobuf_DescriptorProto *msg, upb_arena *arena) {
+  struct google_protobuf_DescriptorProto_ExtensionRange* sub = (struct google_protobuf_DescriptorProto_ExtensionRange*)upb_msg_new(&google_protobuf_DescriptorProto_ExtensionRange_msginit, arena);
+  bool ok = _upb_array_append_accessor(
+      msg, UPB_SIZE(28, 56), UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, &sub, arena);
+  if (!ok) return NULL;
+  return sub;
+}
+UPB_INLINE google_protobuf_FieldDescriptorProto** google_protobuf_DescriptorProto_mutable_extension(google_protobuf_DescriptorProto *msg, size_t *len) {
+  return (google_protobuf_FieldDescriptorProto**)_upb_array_mutable_accessor(msg, UPB_SIZE(32, 64), len);
+}
+UPB_INLINE google_protobuf_FieldDescriptorProto** google_protobuf_DescriptorProto_resize_extension(google_protobuf_DescriptorProto *msg, size_t len, upb_arena *arena) {
+  return (google_protobuf_FieldDescriptorProto**)_upb_array_resize_accessor(msg, UPB_SIZE(32, 64), len, UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, arena);
+}
+UPB_INLINE struct google_protobuf_FieldDescriptorProto* google_protobuf_DescriptorProto_add_extension(google_protobuf_DescriptorProto *msg, upb_arena *arena) {
+  struct google_protobuf_FieldDescriptorProto* sub = (struct google_protobuf_FieldDescriptorProto*)upb_msg_new(&google_protobuf_FieldDescriptorProto_msginit, arena);
+  bool ok = _upb_array_append_accessor(
+      msg, UPB_SIZE(32, 64), UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, &sub, arena);
+  if (!ok) return NULL;
+  return sub;
+}
+UPB_INLINE void google_protobuf_DescriptorProto_set_options(google_protobuf_DescriptorProto *msg, google_protobuf_MessageOptions* value) {
+  _upb_sethas(msg, 1);
+  UPB_FIELD_AT(msg, google_protobuf_MessageOptions*, UPB_SIZE(12, 24)) = value;
+}
+UPB_INLINE struct google_protobuf_MessageOptions* google_protobuf_DescriptorProto_mutable_options(google_protobuf_DescriptorProto *msg, upb_arena *arena) {
+  struct google_protobuf_MessageOptions* sub = (struct google_protobuf_MessageOptions*)google_protobuf_DescriptorProto_options(msg);
+  if (sub == NULL) {
+    sub = (struct google_protobuf_MessageOptions*)upb_msg_new(&google_protobuf_MessageOptions_msginit, arena);
+    if (!sub) return NULL;
+    google_protobuf_DescriptorProto_set_options(msg, sub);
+  }
+  return sub;
+}
+UPB_INLINE google_protobuf_OneofDescriptorProto** google_protobuf_DescriptorProto_mutable_oneof_decl(google_protobuf_DescriptorProto *msg, size_t *len) {
+  return (google_protobuf_OneofDescriptorProto**)_upb_array_mutable_accessor(msg, UPB_SIZE(36, 72), len);
+}
+UPB_INLINE google_protobuf_OneofDescriptorProto** google_protobuf_DescriptorProto_resize_oneof_decl(google_protobuf_DescriptorProto *msg, size_t len, upb_arena *arena) {
+  return (google_protobuf_OneofDescriptorProto**)_upb_array_resize_accessor(msg, UPB_SIZE(36, 72), len, UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, arena);
+}
+UPB_INLINE struct google_protobuf_OneofDescriptorProto* google_protobuf_DescriptorProto_add_oneof_decl(google_protobuf_DescriptorProto *msg, upb_arena *arena) {
+  struct google_protobuf_OneofDescriptorProto* sub = (struct google_protobuf_OneofDescriptorProto*)upb_msg_new(&google_protobuf_OneofDescriptorProto_msginit, arena);
+  bool ok = _upb_array_append_accessor(
+      msg, UPB_SIZE(36, 72), UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, &sub, arena);
+  if (!ok) return NULL;
+  return sub;
+}
+UPB_INLINE google_protobuf_DescriptorProto_ReservedRange** google_protobuf_DescriptorProto_mutable_reserved_range(google_protobuf_DescriptorProto *msg, size_t *len) {
+  return (google_protobuf_DescriptorProto_ReservedRange**)_upb_array_mutable_accessor(msg, UPB_SIZE(40, 80), len);
+}
+UPB_INLINE google_protobuf_DescriptorProto_ReservedRange** google_protobuf_DescriptorProto_resize_reserved_range(google_protobuf_DescriptorProto *msg, size_t len, upb_arena *arena) {
+  return (google_protobuf_DescriptorProto_ReservedRange**)_upb_array_resize_accessor(msg, UPB_SIZE(40, 80), len, UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, arena);
+}
+UPB_INLINE struct google_protobuf_DescriptorProto_ReservedRange* google_protobuf_DescriptorProto_add_reserved_range(google_protobuf_DescriptorProto *msg, upb_arena *arena) {
+  struct google_protobuf_DescriptorProto_ReservedRange* sub = (struct google_protobuf_DescriptorProto_ReservedRange*)upb_msg_new(&google_protobuf_DescriptorProto_ReservedRange_msginit, arena);
+  bool ok = _upb_array_append_accessor(
+      msg, UPB_SIZE(40, 80), UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, &sub, arena);
+  if (!ok) return NULL;
+  return sub;
+}
+UPB_INLINE upb_strview* google_protobuf_DescriptorProto_mutable_reserved_name(google_protobuf_DescriptorProto *msg, size_t *len) {
+  return (upb_strview*)_upb_array_mutable_accessor(msg, UPB_SIZE(44, 88), len);
+}
+UPB_INLINE upb_strview* google_protobuf_DescriptorProto_resize_reserved_name(google_protobuf_DescriptorProto *msg, size_t len, upb_arena *arena) {
+  return (upb_strview*)_upb_array_resize_accessor(msg, UPB_SIZE(44, 88), len, UPB_SIZE(8, 16), UPB_TYPE_STRING, arena);
+}
+UPB_INLINE bool google_protobuf_DescriptorProto_add_reserved_name(google_protobuf_DescriptorProto *msg, upb_strview val, upb_arena *arena) {
+  return _upb_array_append_accessor(
+      msg, UPB_SIZE(44, 88), UPB_SIZE(8, 16), UPB_TYPE_STRING, &val, arena);
+}
 
 
 /* google.protobuf.DescriptorProto.ExtensionRange */
 
-extern const upb_msglayout google_protobuf_DescriptorProto_ExtensionRange_msginit;
 UPB_INLINE google_protobuf_DescriptorProto_ExtensionRange *google_protobuf_DescriptorProto_ExtensionRange_new(upb_arena *arena) {
   return (google_protobuf_DescriptorProto_ExtensionRange *)upb_msg_new(&google_protobuf_DescriptorProto_ExtensionRange_msginit, arena);
 }
-UPB_INLINE google_protobuf_DescriptorProto_ExtensionRange *google_protobuf_DescriptorProto_ExtensionRange_parsenew(upb_stringview buf, upb_arena *arena) {
+UPB_INLINE google_protobuf_DescriptorProto_ExtensionRange *google_protobuf_DescriptorProto_ExtensionRange_parsenew(upb_strview buf, upb_arena *arena) {
   google_protobuf_DescriptorProto_ExtensionRange *ret = google_protobuf_DescriptorProto_ExtensionRange_new(arena);
   return (ret && upb_decode(buf, ret, &google_protobuf_DescriptorProto_ExtensionRange_msginit)) ? ret : NULL;
 }
@@ -235,22 +495,42 @@ UPB_INLINE char *google_protobuf_DescriptorProto_ExtensionRange_serialize(const
   return upb_encode(msg, &google_protobuf_DescriptorProto_ExtensionRange_msginit, arena, len);
 }
 
+UPB_INLINE bool google_protobuf_DescriptorProto_ExtensionRange_has_start(const google_protobuf_DescriptorProto_ExtensionRange *msg) { return _upb_has_field(msg, 0); }
 UPB_INLINE int32_t google_protobuf_DescriptorProto_ExtensionRange_start(const google_protobuf_DescriptorProto_ExtensionRange *msg) { return UPB_FIELD_AT(msg, int32_t, UPB_SIZE(4, 4)); }
+UPB_INLINE bool google_protobuf_DescriptorProto_ExtensionRange_has_end(const google_protobuf_DescriptorProto_ExtensionRange *msg) { return _upb_has_field(msg, 1); }
 UPB_INLINE int32_t google_protobuf_DescriptorProto_ExtensionRange_end(const google_protobuf_DescriptorProto_ExtensionRange *msg) { return UPB_FIELD_AT(msg, int32_t, UPB_SIZE(8, 8)); }
+UPB_INLINE bool google_protobuf_DescriptorProto_ExtensionRange_has_options(const google_protobuf_DescriptorProto_ExtensionRange *msg) { return _upb_has_field(msg, 2); }
 UPB_INLINE const google_protobuf_ExtensionRangeOptions* google_protobuf_DescriptorProto_ExtensionRange_options(const google_protobuf_DescriptorProto_ExtensionRange *msg) { return UPB_FIELD_AT(msg, const google_protobuf_ExtensionRangeOptions*, UPB_SIZE(12, 16)); }
 
-UPB_INLINE void google_protobuf_DescriptorProto_ExtensionRange_set_start(google_protobuf_DescriptorProto_ExtensionRange *msg, int32_t value) { UPB_FIELD_AT(msg, int32_t, UPB_SIZE(4, 4)) = value; }
-UPB_INLINE void google_protobuf_DescriptorProto_ExtensionRange_set_end(google_protobuf_DescriptorProto_ExtensionRange *msg, int32_t value) { UPB_FIELD_AT(msg, int32_t, UPB_SIZE(8, 8)) = value; }
-UPB_INLINE void google_protobuf_DescriptorProto_ExtensionRange_set_options(google_protobuf_DescriptorProto_ExtensionRange *msg, google_protobuf_ExtensionRangeOptions* value) { UPB_FIELD_AT(msg, google_protobuf_ExtensionRangeOptions*, UPB_SIZE(12, 16)) = value; }
+UPB_INLINE void google_protobuf_DescriptorProto_ExtensionRange_set_start(google_protobuf_DescriptorProto_ExtensionRange *msg, int32_t value) {
+  _upb_sethas(msg, 0);
+  UPB_FIELD_AT(msg, int32_t, UPB_SIZE(4, 4)) = value;
+}
+UPB_INLINE void google_protobuf_DescriptorProto_ExtensionRange_set_end(google_protobuf_DescriptorProto_ExtensionRange *msg, int32_t value) {
+  _upb_sethas(msg, 1);
+  UPB_FIELD_AT(msg, int32_t, UPB_SIZE(8, 8)) = value;
+}
+UPB_INLINE void google_protobuf_DescriptorProto_ExtensionRange_set_options(google_protobuf_DescriptorProto_ExtensionRange *msg, google_protobuf_ExtensionRangeOptions* value) {
+  _upb_sethas(msg, 2);
+  UPB_FIELD_AT(msg, google_protobuf_ExtensionRangeOptions*, UPB_SIZE(12, 16)) = value;
+}
+UPB_INLINE struct google_protobuf_ExtensionRangeOptions* google_protobuf_DescriptorProto_ExtensionRange_mutable_options(google_protobuf_DescriptorProto_ExtensionRange *msg, upb_arena *arena) {
+  struct google_protobuf_ExtensionRangeOptions* sub = (struct google_protobuf_ExtensionRangeOptions*)google_protobuf_DescriptorProto_ExtensionRange_options(msg);
+  if (sub == NULL) {
+    sub = (struct google_protobuf_ExtensionRangeOptions*)upb_msg_new(&google_protobuf_ExtensionRangeOptions_msginit, arena);
+    if (!sub) return NULL;
+    google_protobuf_DescriptorProto_ExtensionRange_set_options(msg, sub);
+  }
+  return sub;
+}
 
 
 /* google.protobuf.DescriptorProto.ReservedRange */
 
-extern const upb_msglayout google_protobuf_DescriptorProto_ReservedRange_msginit;
 UPB_INLINE google_protobuf_DescriptorProto_ReservedRange *google_protobuf_DescriptorProto_ReservedRange_new(upb_arena *arena) {
   return (google_protobuf_DescriptorProto_ReservedRange *)upb_msg_new(&google_protobuf_DescriptorProto_ReservedRange_msginit, arena);
 }
-UPB_INLINE google_protobuf_DescriptorProto_ReservedRange *google_protobuf_DescriptorProto_ReservedRange_parsenew(upb_stringview buf, upb_arena *arena) {
+UPB_INLINE google_protobuf_DescriptorProto_ReservedRange *google_protobuf_DescriptorProto_ReservedRange_parsenew(upb_strview buf, upb_arena *arena) {
   google_protobuf_DescriptorProto_ReservedRange *ret = google_protobuf_DescriptorProto_ReservedRange_new(arena);
   return (ret && upb_decode(buf, ret, &google_protobuf_DescriptorProto_ReservedRange_msginit)) ? ret : NULL;
 }
@@ -258,20 +538,27 @@ UPB_INLINE char *google_protobuf_DescriptorProto_ReservedRange_serialize(const g
   return upb_encode(msg, &google_protobuf_DescriptorProto_ReservedRange_msginit, arena, len);
 }
 
+UPB_INLINE bool google_protobuf_DescriptorProto_ReservedRange_has_start(const google_protobuf_DescriptorProto_ReservedRange *msg) { return _upb_has_field(msg, 0); }
 UPB_INLINE int32_t google_protobuf_DescriptorProto_ReservedRange_start(const google_protobuf_DescriptorProto_ReservedRange *msg) { return UPB_FIELD_AT(msg, int32_t, UPB_SIZE(4, 4)); }
+UPB_INLINE bool google_protobuf_DescriptorProto_ReservedRange_has_end(const google_protobuf_DescriptorProto_ReservedRange *msg) { return _upb_has_field(msg, 1); }
 UPB_INLINE int32_t google_protobuf_DescriptorProto_ReservedRange_end(const google_protobuf_DescriptorProto_ReservedRange *msg) { return UPB_FIELD_AT(msg, int32_t, UPB_SIZE(8, 8)); }
 
-UPB_INLINE void google_protobuf_DescriptorProto_ReservedRange_set_start(google_protobuf_DescriptorProto_ReservedRange *msg, int32_t value) { UPB_FIELD_AT(msg, int32_t, UPB_SIZE(4, 4)) = value; }
-UPB_INLINE void google_protobuf_DescriptorProto_ReservedRange_set_end(google_protobuf_DescriptorProto_ReservedRange *msg, int32_t value) { UPB_FIELD_AT(msg, int32_t, UPB_SIZE(8, 8)) = value; }
+UPB_INLINE void google_protobuf_DescriptorProto_ReservedRange_set_start(google_protobuf_DescriptorProto_ReservedRange *msg, int32_t value) {
+  _upb_sethas(msg, 0);
+  UPB_FIELD_AT(msg, int32_t, UPB_SIZE(4, 4)) = value;
+}
+UPB_INLINE void google_protobuf_DescriptorProto_ReservedRange_set_end(google_protobuf_DescriptorProto_ReservedRange *msg, int32_t value) {
+  _upb_sethas(msg, 1);
+  UPB_FIELD_AT(msg, int32_t, UPB_SIZE(8, 8)) = value;
+}
 
 
 /* google.protobuf.ExtensionRangeOptions */
 
-extern const upb_msglayout google_protobuf_ExtensionRangeOptions_msginit;
 UPB_INLINE google_protobuf_ExtensionRangeOptions *google_protobuf_ExtensionRangeOptions_new(upb_arena *arena) {
   return (google_protobuf_ExtensionRangeOptions *)upb_msg_new(&google_protobuf_ExtensionRangeOptions_msginit, arena);
 }
-UPB_INLINE google_protobuf_ExtensionRangeOptions *google_protobuf_ExtensionRangeOptions_parsenew(upb_stringview buf, upb_arena *arena) {
+UPB_INLINE google_protobuf_ExtensionRangeOptions *google_protobuf_ExtensionRangeOptions_parsenew(upb_strview buf, upb_arena *arena) {
   google_protobuf_ExtensionRangeOptions *ret = google_protobuf_ExtensionRangeOptions_new(arena);
   return (ret && upb_decode(buf, ret, &google_protobuf_ExtensionRangeOptions_msginit)) ? ret : NULL;
 }
@@ -279,18 +566,29 @@ UPB_INLINE char *google_protobuf_ExtensionRangeOptions_serialize(const google_pr
   return upb_encode(msg, &google_protobuf_ExtensionRangeOptions_msginit, arena, len);
 }
 
-UPB_INLINE const upb_array* google_protobuf_ExtensionRangeOptions_uninterpreted_option(const google_protobuf_ExtensionRangeOptions *msg) { return UPB_FIELD_AT(msg, const upb_array*, UPB_SIZE(0, 0)); }
+UPB_INLINE const google_protobuf_UninterpretedOption* const* google_protobuf_ExtensionRangeOptions_uninterpreted_option(const google_protobuf_ExtensionRangeOptions *msg, size_t *len) { return (const google_protobuf_UninterpretedOption* const*)_upb_array_accessor(msg, UPB_SIZE(0, 0), len); }
 
-UPB_INLINE void google_protobuf_ExtensionRangeOptions_set_uninterpreted_option(google_protobuf_ExtensionRangeOptions *msg, upb_array* value) { UPB_FIELD_AT(msg, upb_array*, UPB_SIZE(0, 0)) = value; }
+UPB_INLINE google_protobuf_UninterpretedOption** google_protobuf_ExtensionRangeOptions_mutable_uninterpreted_option(google_protobuf_ExtensionRangeOptions *msg, size_t *len) {
+  return (google_protobuf_UninterpretedOption**)_upb_array_mutable_accessor(msg, UPB_SIZE(0, 0), len);
+}
+UPB_INLINE google_protobuf_UninterpretedOption** google_protobuf_ExtensionRangeOptions_resize_uninterpreted_option(google_protobuf_ExtensionRangeOptions *msg, size_t len, upb_arena *arena) {
+  return (google_protobuf_UninterpretedOption**)_upb_array_resize_accessor(msg, UPB_SIZE(0, 0), len, UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, arena);
+}
+UPB_INLINE struct google_protobuf_UninterpretedOption* google_protobuf_ExtensionRangeOptions_add_uninterpreted_option(google_protobuf_ExtensionRangeOptions *msg, upb_arena *arena) {
+  struct google_protobuf_UninterpretedOption* sub = (struct google_protobuf_UninterpretedOption*)upb_msg_new(&google_protobuf_UninterpretedOption_msginit, arena);
+  bool ok = _upb_array_append_accessor(
+      msg, UPB_SIZE(0, 0), UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, &sub, arena);
+  if (!ok) return NULL;
+  return sub;
+}
 
 
 /* google.protobuf.FieldDescriptorProto */
 
-extern const upb_msglayout google_protobuf_FieldDescriptorProto_msginit;
 UPB_INLINE google_protobuf_FieldDescriptorProto *google_protobuf_FieldDescriptorProto_new(upb_arena *arena) {
   return (google_protobuf_FieldDescriptorProto *)upb_msg_new(&google_protobuf_FieldDescriptorProto_msginit, arena);
 }
-UPB_INLINE google_protobuf_FieldDescriptorProto *google_protobuf_FieldDescriptorProto_parsenew(upb_stringview buf, upb_arena *arena) {
+UPB_INLINE google_protobuf_FieldDescriptorProto *google_protobuf_FieldDescriptorProto_parsenew(upb_strview buf, upb_arena *arena) {
   google_protobuf_FieldDescriptorProto *ret = google_protobuf_FieldDescriptorProto_new(arena);
   return (ret && upb_decode(buf, ret, &google_protobuf_FieldDescriptorProto_msginit)) ? ret : NULL;
 }
@@ -298,36 +596,84 @@ UPB_INLINE char *google_protobuf_FieldDescriptorProto_serialize(const google_pro
   return upb_encode(msg, &google_protobuf_FieldDescriptorProto_msginit, arena, len);
 }
 
-UPB_INLINE upb_stringview google_protobuf_FieldDescriptorProto_name(const google_protobuf_FieldDescriptorProto *msg) { return UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(32, 32)); }
-UPB_INLINE upb_stringview google_protobuf_FieldDescriptorProto_extendee(const google_protobuf_FieldDescriptorProto *msg) { return UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(40, 48)); }
+UPB_INLINE bool google_protobuf_FieldDescriptorProto_has_name(const google_protobuf_FieldDescriptorProto *msg) { return _upb_has_field(msg, 4); }
+UPB_INLINE upb_strview google_protobuf_FieldDescriptorProto_name(const google_protobuf_FieldDescriptorProto *msg) { return UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(32, 32)); }
+UPB_INLINE bool google_protobuf_FieldDescriptorProto_has_extendee(const google_protobuf_FieldDescriptorProto *msg) { return _upb_has_field(msg, 5); }
+UPB_INLINE upb_strview google_protobuf_FieldDescriptorProto_extendee(const google_protobuf_FieldDescriptorProto *msg) { return UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(40, 48)); }
+UPB_INLINE bool google_protobuf_FieldDescriptorProto_has_number(const google_protobuf_FieldDescriptorProto *msg) { return _upb_has_field(msg, 2); }
 UPB_INLINE int32_t google_protobuf_FieldDescriptorProto_number(const google_protobuf_FieldDescriptorProto *msg) { return UPB_FIELD_AT(msg, int32_t, UPB_SIZE(24, 24)); }
+UPB_INLINE bool google_protobuf_FieldDescriptorProto_has_label(const google_protobuf_FieldDescriptorProto *msg) { return _upb_has_field(msg, 0); }
 UPB_INLINE google_protobuf_FieldDescriptorProto_Label google_protobuf_FieldDescriptorProto_label(const google_protobuf_FieldDescriptorProto *msg) { return UPB_FIELD_AT(msg, google_protobuf_FieldDescriptorProto_Label, UPB_SIZE(8, 8)); }
+UPB_INLINE bool google_protobuf_FieldDescriptorProto_has_type(const google_protobuf_FieldDescriptorProto *msg) { return _upb_has_field(msg, 1); }
 UPB_INLINE google_protobuf_FieldDescriptorProto_Type google_protobuf_FieldDescriptorProto_type(const google_protobuf_FieldDescriptorProto *msg) { return UPB_FIELD_AT(msg, google_protobuf_FieldDescriptorProto_Type, UPB_SIZE(16, 16)); }
-UPB_INLINE upb_stringview google_protobuf_FieldDescriptorProto_type_name(const google_protobuf_FieldDescriptorProto *msg) { return UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(48, 64)); }
-UPB_INLINE upb_stringview google_protobuf_FieldDescriptorProto_default_value(const google_protobuf_FieldDescriptorProto *msg) { return UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(56, 80)); }
+UPB_INLINE bool google_protobuf_FieldDescriptorProto_has_type_name(const google_protobuf_FieldDescriptorProto *msg) { return _upb_has_field(msg, 6); }
+UPB_INLINE upb_strview google_protobuf_FieldDescriptorProto_type_name(const google_protobuf_FieldDescriptorProto *msg) { return UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(48, 64)); }
+UPB_INLINE bool google_protobuf_FieldDescriptorProto_has_default_value(const google_protobuf_FieldDescriptorProto *msg) { return _upb_has_field(msg, 7); }
+UPB_INLINE upb_strview google_protobuf_FieldDescriptorProto_default_value(const google_protobuf_FieldDescriptorProto *msg) { return UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(56, 80)); }
+UPB_INLINE bool google_protobuf_FieldDescriptorProto_has_options(const google_protobuf_FieldDescriptorProto *msg) { return _upb_has_field(msg, 9); }
 UPB_INLINE const google_protobuf_FieldOptions* google_protobuf_FieldDescriptorProto_options(const google_protobuf_FieldDescriptorProto *msg) { return UPB_FIELD_AT(msg, const google_protobuf_FieldOptions*, UPB_SIZE(72, 112)); }
+UPB_INLINE bool google_protobuf_FieldDescriptorProto_has_oneof_index(const google_protobuf_FieldDescriptorProto *msg) { return _upb_has_field(msg, 3); }
 UPB_INLINE int32_t google_protobuf_FieldDescriptorProto_oneof_index(const google_protobuf_FieldDescriptorProto *msg) { return UPB_FIELD_AT(msg, int32_t, UPB_SIZE(28, 28)); }
-UPB_INLINE upb_stringview google_protobuf_FieldDescriptorProto_json_name(const google_protobuf_FieldDescriptorProto *msg) { return UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(64, 96)); }
+UPB_INLINE bool google_protobuf_FieldDescriptorProto_has_json_name(const google_protobuf_FieldDescriptorProto *msg) { return _upb_has_field(msg, 8); }
+UPB_INLINE upb_strview google_protobuf_FieldDescriptorProto_json_name(const google_protobuf_FieldDescriptorProto *msg) { return UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(64, 96)); }
 
-UPB_INLINE void google_protobuf_FieldDescriptorProto_set_name(google_protobuf_FieldDescriptorProto *msg, upb_stringview value) { UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(32, 32)) = value; }
-UPB_INLINE void google_protobuf_FieldDescriptorProto_set_extendee(google_protobuf_FieldDescriptorProto *msg, upb_stringview value) { UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(40, 48)) = value; }
-UPB_INLINE void google_protobuf_FieldDescriptorProto_set_number(google_protobuf_FieldDescriptorProto *msg, int32_t value) { UPB_FIELD_AT(msg, int32_t, UPB_SIZE(24, 24)) = value; }
-UPB_INLINE void google_protobuf_FieldDescriptorProto_set_label(google_protobuf_FieldDescriptorProto *msg, google_protobuf_FieldDescriptorProto_Label value) { UPB_FIELD_AT(msg, google_protobuf_FieldDescriptorProto_Label, UPB_SIZE(8, 8)) = value; }
-UPB_INLINE void google_protobuf_FieldDescriptorProto_set_type(google_protobuf_FieldDescriptorProto *msg, google_protobuf_FieldDescriptorProto_Type value) { UPB_FIELD_AT(msg, google_protobuf_FieldDescriptorProto_Type, UPB_SIZE(16, 16)) = value; }
-UPB_INLINE void google_protobuf_FieldDescriptorProto_set_type_name(google_protobuf_FieldDescriptorProto *msg, upb_stringview value) { UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(48, 64)) = value; }
-UPB_INLINE void google_protobuf_FieldDescriptorProto_set_default_value(google_protobuf_FieldDescriptorProto *msg, upb_stringview value) { UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(56, 80)) = value; }
-UPB_INLINE void google_protobuf_FieldDescriptorProto_set_options(google_protobuf_FieldDescriptorProto *msg, google_protobuf_FieldOptions* value) { UPB_FIELD_AT(msg, google_protobuf_FieldOptions*, UPB_SIZE(72, 112)) = value; }
-UPB_INLINE void google_protobuf_FieldDescriptorProto_set_oneof_index(google_protobuf_FieldDescriptorProto *msg, int32_t value) { UPB_FIELD_AT(msg, int32_t, UPB_SIZE(28, 28)) = value; }
-UPB_INLINE void google_protobuf_FieldDescriptorProto_set_json_name(google_protobuf_FieldDescriptorProto *msg, upb_stringview value) { UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(64, 96)) = value; }
+UPB_INLINE void google_protobuf_FieldDescriptorProto_set_name(google_protobuf_FieldDescriptorProto *msg, upb_strview value) {
+  _upb_sethas(msg, 4);
+  UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(32, 32)) = value;
+}
+UPB_INLINE void google_protobuf_FieldDescriptorProto_set_extendee(google_protobuf_FieldDescriptorProto *msg, upb_strview value) {
+  _upb_sethas(msg, 5);
+  UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(40, 48)) = value;
+}
+UPB_INLINE void google_protobuf_FieldDescriptorProto_set_number(google_protobuf_FieldDescriptorProto *msg, int32_t value) {
+  _upb_sethas(msg, 2);
+  UPB_FIELD_AT(msg, int32_t, UPB_SIZE(24, 24)) = value;
+}
+UPB_INLINE void google_protobuf_FieldDescriptorProto_set_label(google_protobuf_FieldDescriptorProto *msg, google_protobuf_FieldDescriptorProto_Label value) {
+  _upb_sethas(msg, 0);
+  UPB_FIELD_AT(msg, google_protobuf_FieldDescriptorProto_Label, UPB_SIZE(8, 8)) = value;
+}
+UPB_INLINE void google_protobuf_FieldDescriptorProto_set_type(google_protobuf_FieldDescriptorProto *msg, google_protobuf_FieldDescriptorProto_Type value) {
+  _upb_sethas(msg, 1);
+  UPB_FIELD_AT(msg, google_protobuf_FieldDescriptorProto_Type, UPB_SIZE(16, 16)) = value;
+}
+UPB_INLINE void google_protobuf_FieldDescriptorProto_set_type_name(google_protobuf_FieldDescriptorProto *msg, upb_strview value) {
+  _upb_sethas(msg, 6);
+  UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(48, 64)) = value;
+}
+UPB_INLINE void google_protobuf_FieldDescriptorProto_set_default_value(google_protobuf_FieldDescriptorProto *msg, upb_strview value) {
+  _upb_sethas(msg, 7);
+  UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(56, 80)) = value;
+}
+UPB_INLINE void google_protobuf_FieldDescriptorProto_set_options(google_protobuf_FieldDescriptorProto *msg, google_protobuf_FieldOptions* value) {
+  _upb_sethas(msg, 9);
+  UPB_FIELD_AT(msg, google_protobuf_FieldOptions*, UPB_SIZE(72, 112)) = value;
+}
+UPB_INLINE struct google_protobuf_FieldOptions* google_protobuf_FieldDescriptorProto_mutable_options(google_protobuf_FieldDescriptorProto *msg, upb_arena *arena) {
+  struct google_protobuf_FieldOptions* sub = (struct google_protobuf_FieldOptions*)google_protobuf_FieldDescriptorProto_options(msg);
+  if (sub == NULL) {
+    sub = (struct google_protobuf_FieldOptions*)upb_msg_new(&google_protobuf_FieldOptions_msginit, arena);
+    if (!sub) return NULL;
+    google_protobuf_FieldDescriptorProto_set_options(msg, sub);
+  }
+  return sub;
+}
+UPB_INLINE void google_protobuf_FieldDescriptorProto_set_oneof_index(google_protobuf_FieldDescriptorProto *msg, int32_t value) {
+  _upb_sethas(msg, 3);
+  UPB_FIELD_AT(msg, int32_t, UPB_SIZE(28, 28)) = value;
+}
+UPB_INLINE void google_protobuf_FieldDescriptorProto_set_json_name(google_protobuf_FieldDescriptorProto *msg, upb_strview value) {
+  _upb_sethas(msg, 8);
+  UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(64, 96)) = value;
+}
 
 
 /* google.protobuf.OneofDescriptorProto */
 
-extern const upb_msglayout google_protobuf_OneofDescriptorProto_msginit;
 UPB_INLINE google_protobuf_OneofDescriptorProto *google_protobuf_OneofDescriptorProto_new(upb_arena *arena) {
   return (google_protobuf_OneofDescriptorProto *)upb_msg_new(&google_protobuf_OneofDescriptorProto_msginit, arena);
 }
-UPB_INLINE google_protobuf_OneofDescriptorProto *google_protobuf_OneofDescriptorProto_parsenew(upb_stringview buf, upb_arena *arena) {
+UPB_INLINE google_protobuf_OneofDescriptorProto *google_protobuf_OneofDescriptorProto_parsenew(upb_strview buf, upb_arena *arena) {
   google_protobuf_OneofDescriptorProto *ret = google_protobuf_OneofDescriptorProto_new(arena);
   return (ret && upb_decode(buf, ret, &google_protobuf_OneofDescriptorProto_msginit)) ? ret : NULL;
 }
@@ -335,20 +681,36 @@ UPB_INLINE char *google_protobuf_OneofDescriptorProto_serialize(const google_pro
   return upb_encode(msg, &google_protobuf_OneofDescriptorProto_msginit, arena, len);
 }
 
-UPB_INLINE upb_stringview google_protobuf_OneofDescriptorProto_name(const google_protobuf_OneofDescriptorProto *msg) { return UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(8, 16)); }
-UPB_INLINE const google_protobuf_OneofOptions* google_protobuf_OneofDescriptorProto_options(const google_protobuf_OneofDescriptorProto *msg) { return UPB_FIELD_AT(msg, const google_protobuf_OneofOptions*, UPB_SIZE(16, 32)); }
+UPB_INLINE bool google_protobuf_OneofDescriptorProto_has_name(const google_protobuf_OneofDescriptorProto *msg) { return _upb_has_field(msg, 0); }
+UPB_INLINE upb_strview google_protobuf_OneofDescriptorProto_name(const google_protobuf_OneofDescriptorProto *msg) { return UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(4, 8)); }
+UPB_INLINE bool google_protobuf_OneofDescriptorProto_has_options(const google_protobuf_OneofDescriptorProto *msg) { return _upb_has_field(msg, 1); }
+UPB_INLINE const google_protobuf_OneofOptions* google_protobuf_OneofDescriptorProto_options(const google_protobuf_OneofDescriptorProto *msg) { return UPB_FIELD_AT(msg, const google_protobuf_OneofOptions*, UPB_SIZE(12, 24)); }
 
-UPB_INLINE void google_protobuf_OneofDescriptorProto_set_name(google_protobuf_OneofDescriptorProto *msg, upb_stringview value) { UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(8, 16)) = value; }
-UPB_INLINE void google_protobuf_OneofDescriptorProto_set_options(google_protobuf_OneofDescriptorProto *msg, google_protobuf_OneofOptions* value) { UPB_FIELD_AT(msg, google_protobuf_OneofOptions*, UPB_SIZE(16, 32)) = value; }
+UPB_INLINE void google_protobuf_OneofDescriptorProto_set_name(google_protobuf_OneofDescriptorProto *msg, upb_strview value) {
+  _upb_sethas(msg, 0);
+  UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(4, 8)) = value;
+}
+UPB_INLINE void google_protobuf_OneofDescriptorProto_set_options(google_protobuf_OneofDescriptorProto *msg, google_protobuf_OneofOptions* value) {
+  _upb_sethas(msg, 1);
+  UPB_FIELD_AT(msg, google_protobuf_OneofOptions*, UPB_SIZE(12, 24)) = value;
+}
+UPB_INLINE struct google_protobuf_OneofOptions* google_protobuf_OneofDescriptorProto_mutable_options(google_protobuf_OneofDescriptorProto *msg, upb_arena *arena) {
+  struct google_protobuf_OneofOptions* sub = (struct google_protobuf_OneofOptions*)google_protobuf_OneofDescriptorProto_options(msg);
+  if (sub == NULL) {
+    sub = (struct google_protobuf_OneofOptions*)upb_msg_new(&google_protobuf_OneofOptions_msginit, arena);
+    if (!sub) return NULL;
+    google_protobuf_OneofDescriptorProto_set_options(msg, sub);
+  }
+  return sub;
+}
 
 
 /* google.protobuf.EnumDescriptorProto */
 
-extern const upb_msglayout google_protobuf_EnumDescriptorProto_msginit;
 UPB_INLINE google_protobuf_EnumDescriptorProto *google_protobuf_EnumDescriptorProto_new(upb_arena *arena) {
   return (google_protobuf_EnumDescriptorProto *)upb_msg_new(&google_protobuf_EnumDescriptorProto_msginit, arena);
 }
-UPB_INLINE google_protobuf_EnumDescriptorProto *google_protobuf_EnumDescriptorProto_parsenew(upb_stringview buf, upb_arena *arena) {
+UPB_INLINE google_protobuf_EnumDescriptorProto *google_protobuf_EnumDescriptorProto_parsenew(upb_strview buf, upb_arena *arena) {
   google_protobuf_EnumDescriptorProto *ret = google_protobuf_EnumDescriptorProto_new(arena);
   return (ret && upb_decode(buf, ret, &google_protobuf_EnumDescriptorProto_msginit)) ? ret : NULL;
 }
@@ -356,26 +718,75 @@ UPB_INLINE char *google_protobuf_EnumDescriptorProto_serialize(const google_prot
   return upb_encode(msg, &google_protobuf_EnumDescriptorProto_msginit, arena, len);
 }
 
-UPB_INLINE upb_stringview google_protobuf_EnumDescriptorProto_name(const google_protobuf_EnumDescriptorProto *msg) { return UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(8, 16)); }
-UPB_INLINE const upb_array* google_protobuf_EnumDescriptorProto_value(const google_protobuf_EnumDescriptorProto *msg) { return UPB_FIELD_AT(msg, const upb_array*, UPB_SIZE(20, 40)); }
-UPB_INLINE const google_protobuf_EnumOptions* google_protobuf_EnumDescriptorProto_options(const google_protobuf_EnumDescriptorProto *msg) { return UPB_FIELD_AT(msg, const google_protobuf_EnumOptions*, UPB_SIZE(16, 32)); }
-UPB_INLINE const upb_array* google_protobuf_EnumDescriptorProto_reserved_range(const google_protobuf_EnumDescriptorProto *msg) { return UPB_FIELD_AT(msg, const upb_array*, UPB_SIZE(24, 48)); }
-UPB_INLINE const upb_array* google_protobuf_EnumDescriptorProto_reserved_name(const google_protobuf_EnumDescriptorProto *msg) { return UPB_FIELD_AT(msg, const upb_array*, UPB_SIZE(28, 56)); }
+UPB_INLINE bool google_protobuf_EnumDescriptorProto_has_name(const google_protobuf_EnumDescriptorProto *msg) { return _upb_has_field(msg, 0); }
+UPB_INLINE upb_strview google_protobuf_EnumDescriptorProto_name(const google_protobuf_EnumDescriptorProto *msg) { return UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(4, 8)); }
+UPB_INLINE const google_protobuf_EnumValueDescriptorProto* const* google_protobuf_EnumDescriptorProto_value(const google_protobuf_EnumDescriptorProto *msg, size_t *len) { return (const google_protobuf_EnumValueDescriptorProto* const*)_upb_array_accessor(msg, UPB_SIZE(16, 32), len); }
+UPB_INLINE bool google_protobuf_EnumDescriptorProto_has_options(const google_protobuf_EnumDescriptorProto *msg) { return _upb_has_field(msg, 1); }
+UPB_INLINE const google_protobuf_EnumOptions* google_protobuf_EnumDescriptorProto_options(const google_protobuf_EnumDescriptorProto *msg) { return UPB_FIELD_AT(msg, const google_protobuf_EnumOptions*, UPB_SIZE(12, 24)); }
+UPB_INLINE const google_protobuf_EnumDescriptorProto_EnumReservedRange* const* google_protobuf_EnumDescriptorProto_reserved_range(const google_protobuf_EnumDescriptorProto *msg, size_t *len) { return (const google_protobuf_EnumDescriptorProto_EnumReservedRange* const*)_upb_array_accessor(msg, UPB_SIZE(20, 40), len); }
+UPB_INLINE upb_strview const* google_protobuf_EnumDescriptorProto_reserved_name(const google_protobuf_EnumDescriptorProto *msg, size_t *len) { return (upb_strview const*)_upb_array_accessor(msg, UPB_SIZE(24, 48), len); }
 
-UPB_INLINE void google_protobuf_EnumDescriptorProto_set_name(google_protobuf_EnumDescriptorProto *msg, upb_stringview value) { UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(8, 16)) = value; }
-UPB_INLINE void google_protobuf_EnumDescriptorProto_set_value(google_protobuf_EnumDescriptorProto *msg, upb_array* value) { UPB_FIELD_AT(msg, upb_array*, UPB_SIZE(20, 40)) = value; }
-UPB_INLINE void google_protobuf_EnumDescriptorProto_set_options(google_protobuf_EnumDescriptorProto *msg, google_protobuf_EnumOptions* value) { UPB_FIELD_AT(msg, google_protobuf_EnumOptions*, UPB_SIZE(16, 32)) = value; }
-UPB_INLINE void google_protobuf_EnumDescriptorProto_set_reserved_range(google_protobuf_EnumDescriptorProto *msg, upb_array* value) { UPB_FIELD_AT(msg, upb_array*, UPB_SIZE(24, 48)) = value; }
-UPB_INLINE void google_protobuf_EnumDescriptorProto_set_reserved_name(google_protobuf_EnumDescriptorProto *msg, upb_array* value) { UPB_FIELD_AT(msg, upb_array*, UPB_SIZE(28, 56)) = value; }
+UPB_INLINE void google_protobuf_EnumDescriptorProto_set_name(google_protobuf_EnumDescriptorProto *msg, upb_strview value) {
+  _upb_sethas(msg, 0);
+  UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(4, 8)) = value;
+}
+UPB_INLINE google_protobuf_EnumValueDescriptorProto** google_protobuf_EnumDescriptorProto_mutable_value(google_protobuf_EnumDescriptorProto *msg, size_t *len) {
+  return (google_protobuf_EnumValueDescriptorProto**)_upb_array_mutable_accessor(msg, UPB_SIZE(16, 32), len);
+}
+UPB_INLINE google_protobuf_EnumValueDescriptorProto** google_protobuf_EnumDescriptorProto_resize_value(google_protobuf_EnumDescriptorProto *msg, size_t len, upb_arena *arena) {
+  return (google_protobuf_EnumValueDescriptorProto**)_upb_array_resize_accessor(msg, UPB_SIZE(16, 32), len, UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, arena);
+}
+UPB_INLINE struct google_protobuf_EnumValueDescriptorProto* google_protobuf_EnumDescriptorProto_add_value(google_protobuf_EnumDescriptorProto *msg, upb_arena *arena) {
+  struct google_protobuf_EnumValueDescriptorProto* sub = (struct google_protobuf_EnumValueDescriptorProto*)upb_msg_new(&google_protobuf_EnumValueDescriptorProto_msginit, arena);
+  bool ok = _upb_array_append_accessor(
+      msg, UPB_SIZE(16, 32), UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, &sub, arena);
+  if (!ok) return NULL;
+  return sub;
+}
+UPB_INLINE void google_protobuf_EnumDescriptorProto_set_options(google_protobuf_EnumDescriptorProto *msg, google_protobuf_EnumOptions* value) {
+  _upb_sethas(msg, 1);
+  UPB_FIELD_AT(msg, google_protobuf_EnumOptions*, UPB_SIZE(12, 24)) = value;
+}
+UPB_INLINE struct google_protobuf_EnumOptions* google_protobuf_EnumDescriptorProto_mutable_options(google_protobuf_EnumDescriptorProto *msg, upb_arena *arena) {
+  struct google_protobuf_EnumOptions* sub = (struct google_protobuf_EnumOptions*)google_protobuf_EnumDescriptorProto_options(msg);
+  if (sub == NULL) {
+    sub = (struct google_protobuf_EnumOptions*)upb_msg_new(&google_protobuf_EnumOptions_msginit, arena);
+    if (!sub) return NULL;
+    google_protobuf_EnumDescriptorProto_set_options(msg, sub);
+  }
+  return sub;
+}
+UPB_INLINE google_protobuf_EnumDescriptorProto_EnumReservedRange** google_protobuf_EnumDescriptorProto_mutable_reserved_range(google_protobuf_EnumDescriptorProto *msg, size_t *len) {
+  return (google_protobuf_EnumDescriptorProto_EnumReservedRange**)_upb_array_mutable_accessor(msg, UPB_SIZE(20, 40), len);
+}
+UPB_INLINE google_protobuf_EnumDescriptorProto_EnumReservedRange** google_protobuf_EnumDescriptorProto_resize_reserved_range(google_protobuf_EnumDescriptorProto *msg, size_t len, upb_arena *arena) {
+  return (google_protobuf_EnumDescriptorProto_EnumReservedRange**)_upb_array_resize_accessor(msg, UPB_SIZE(20, 40), len, UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, arena);
+}
+UPB_INLINE struct google_protobuf_EnumDescriptorProto_EnumReservedRange* google_protobuf_EnumDescriptorProto_add_reserved_range(google_protobuf_EnumDescriptorProto *msg, upb_arena *arena) {
+  struct google_protobuf_EnumDescriptorProto_EnumReservedRange* sub = (struct google_protobuf_EnumDescriptorProto_EnumReservedRange*)upb_msg_new(&google_protobuf_EnumDescriptorProto_EnumReservedRange_msginit, arena);
+  bool ok = _upb_array_append_accessor(
+      msg, UPB_SIZE(20, 40), UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, &sub, arena);
+  if (!ok) return NULL;
+  return sub;
+}
+UPB_INLINE upb_strview* google_protobuf_EnumDescriptorProto_mutable_reserved_name(google_protobuf_EnumDescriptorProto *msg, size_t *len) {
+  return (upb_strview*)_upb_array_mutable_accessor(msg, UPB_SIZE(24, 48), len);
+}
+UPB_INLINE upb_strview* google_protobuf_EnumDescriptorProto_resize_reserved_name(google_protobuf_EnumDescriptorProto *msg, size_t len, upb_arena *arena) {
+  return (upb_strview*)_upb_array_resize_accessor(msg, UPB_SIZE(24, 48), len, UPB_SIZE(8, 16), UPB_TYPE_STRING, arena);
+}
+UPB_INLINE bool google_protobuf_EnumDescriptorProto_add_reserved_name(google_protobuf_EnumDescriptorProto *msg, upb_strview val, upb_arena *arena) {
+  return _upb_array_append_accessor(
+      msg, UPB_SIZE(24, 48), UPB_SIZE(8, 16), UPB_TYPE_STRING, &val, arena);
+}
 
 
 /* google.protobuf.EnumDescriptorProto.EnumReservedRange */
 
-extern const upb_msglayout google_protobuf_EnumDescriptorProto_EnumReservedRange_msginit;
 UPB_INLINE google_protobuf_EnumDescriptorProto_EnumReservedRange *google_protobuf_EnumDescriptorProto_EnumReservedRange_new(upb_arena *arena) {
   return (google_protobuf_EnumDescriptorProto_EnumReservedRange *)upb_msg_new(&google_protobuf_EnumDescriptorProto_EnumReservedRange_msginit, arena);
 }
-UPB_INLINE google_protobuf_EnumDescriptorProto_EnumReservedRange *google_protobuf_EnumDescriptorProto_EnumReservedRange_parsenew(upb_stringview buf, upb_arena *arena) {
+UPB_INLINE google_protobuf_EnumDescriptorProto_EnumReservedRange *google_protobuf_EnumDescriptorProto_EnumReservedRange_parsenew(upb_strview buf, upb_arena *arena) {
   google_protobuf_EnumDescriptorProto_EnumReservedRange *ret = google_protobuf_EnumDescriptorProto_EnumReservedRange_new(arena);
   return (ret && upb_decode(buf, ret, &google_protobuf_EnumDescriptorProto_EnumReservedRange_msginit)) ? ret : NULL;
 }
@@ -383,20 +794,27 @@ UPB_INLINE char *google_protobuf_EnumDescriptorProto_EnumReservedRange_serialize
   return upb_encode(msg, &google_protobuf_EnumDescriptorProto_EnumReservedRange_msginit, arena, len);
 }
 
+UPB_INLINE bool google_protobuf_EnumDescriptorProto_EnumReservedRange_has_start(const google_protobuf_EnumDescriptorProto_EnumReservedRange *msg) { return _upb_has_field(msg, 0); }
 UPB_INLINE int32_t google_protobuf_EnumDescriptorProto_EnumReservedRange_start(const google_protobuf_EnumDescriptorProto_EnumReservedRange *msg) { return UPB_FIELD_AT(msg, int32_t, UPB_SIZE(4, 4)); }
+UPB_INLINE bool google_protobuf_EnumDescriptorProto_EnumReservedRange_has_end(const google_protobuf_EnumDescriptorProto_EnumReservedRange *msg) { return _upb_has_field(msg, 1); }
 UPB_INLINE int32_t google_protobuf_EnumDescriptorProto_EnumReservedRange_end(const google_protobuf_EnumDescriptorProto_EnumReservedRange *msg) { return UPB_FIELD_AT(msg, int32_t, UPB_SIZE(8, 8)); }
 
-UPB_INLINE void google_protobuf_EnumDescriptorProto_EnumReservedRange_set_start(google_protobuf_EnumDescriptorProto_EnumReservedRange *msg, int32_t value) { UPB_FIELD_AT(msg, int32_t, UPB_SIZE(4, 4)) = value; }
-UPB_INLINE void google_protobuf_EnumDescriptorProto_EnumReservedRange_set_end(google_protobuf_EnumDescriptorProto_EnumReservedRange *msg, int32_t value) { UPB_FIELD_AT(msg, int32_t, UPB_SIZE(8, 8)) = value; }
+UPB_INLINE void google_protobuf_EnumDescriptorProto_EnumReservedRange_set_start(google_protobuf_EnumDescriptorProto_EnumReservedRange *msg, int32_t value) {
+  _upb_sethas(msg, 0);
+  UPB_FIELD_AT(msg, int32_t, UPB_SIZE(4, 4)) = value;
+}
+UPB_INLINE void google_protobuf_EnumDescriptorProto_EnumReservedRange_set_end(google_protobuf_EnumDescriptorProto_EnumReservedRange *msg, int32_t value) {
+  _upb_sethas(msg, 1);
+  UPB_FIELD_AT(msg, int32_t, UPB_SIZE(8, 8)) = value;
+}
 
 
 /* google.protobuf.EnumValueDescriptorProto */
 
-extern const upb_msglayout google_protobuf_EnumValueDescriptorProto_msginit;
 UPB_INLINE google_protobuf_EnumValueDescriptorProto *google_protobuf_EnumValueDescriptorProto_new(upb_arena *arena) {
   return (google_protobuf_EnumValueDescriptorProto *)upb_msg_new(&google_protobuf_EnumValueDescriptorProto_msginit, arena);
 }
-UPB_INLINE google_protobuf_EnumValueDescriptorProto *google_protobuf_EnumValueDescriptorProto_parsenew(upb_stringview buf, upb_arena *arena) {
+UPB_INLINE google_protobuf_EnumValueDescriptorProto *google_protobuf_EnumValueDescriptorProto_parsenew(upb_strview buf, upb_arena *arena) {
   google_protobuf_EnumValueDescriptorProto *ret = google_protobuf_EnumValueDescriptorProto_new(arena);
   return (ret && upb_decode(buf, ret, &google_protobuf_EnumValueDescriptorProto_msginit)) ? ret : NULL;
 }
@@ -404,22 +822,42 @@ UPB_INLINE char *google_protobuf_EnumValueDescriptorProto_serialize(const google
   return upb_encode(msg, &google_protobuf_EnumValueDescriptorProto_msginit, arena, len);
 }
 
-UPB_INLINE upb_stringview google_protobuf_EnumValueDescriptorProto_name(const google_protobuf_EnumValueDescriptorProto *msg) { return UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(8, 16)); }
+UPB_INLINE bool google_protobuf_EnumValueDescriptorProto_has_name(const google_protobuf_EnumValueDescriptorProto *msg) { return _upb_has_field(msg, 1); }
+UPB_INLINE upb_strview google_protobuf_EnumValueDescriptorProto_name(const google_protobuf_EnumValueDescriptorProto *msg) { return UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(8, 8)); }
+UPB_INLINE bool google_protobuf_EnumValueDescriptorProto_has_number(const google_protobuf_EnumValueDescriptorProto *msg) { return _upb_has_field(msg, 0); }
 UPB_INLINE int32_t google_protobuf_EnumValueDescriptorProto_number(const google_protobuf_EnumValueDescriptorProto *msg) { return UPB_FIELD_AT(msg, int32_t, UPB_SIZE(4, 4)); }
-UPB_INLINE const google_protobuf_EnumValueOptions* google_protobuf_EnumValueDescriptorProto_options(const google_protobuf_EnumValueDescriptorProto *msg) { return UPB_FIELD_AT(msg, const google_protobuf_EnumValueOptions*, UPB_SIZE(16, 32)); }
+UPB_INLINE bool google_protobuf_EnumValueDescriptorProto_has_options(const google_protobuf_EnumValueDescriptorProto *msg) { return _upb_has_field(msg, 2); }
+UPB_INLINE const google_protobuf_EnumValueOptions* google_protobuf_EnumValueDescriptorProto_options(const google_protobuf_EnumValueDescriptorProto *msg) { return UPB_FIELD_AT(msg, const google_protobuf_EnumValueOptions*, UPB_SIZE(16, 24)); }
 
-UPB_INLINE void google_protobuf_EnumValueDescriptorProto_set_name(google_protobuf_EnumValueDescriptorProto *msg, upb_stringview value) { UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(8, 16)) = value; }
-UPB_INLINE void google_protobuf_EnumValueDescriptorProto_set_number(google_protobuf_EnumValueDescriptorProto *msg, int32_t value) { UPB_FIELD_AT(msg, int32_t, UPB_SIZE(4, 4)) = value; }
-UPB_INLINE void google_protobuf_EnumValueDescriptorProto_set_options(google_protobuf_EnumValueDescriptorProto *msg, google_protobuf_EnumValueOptions* value) { UPB_FIELD_AT(msg, google_protobuf_EnumValueOptions*, UPB_SIZE(16, 32)) = value; }
+UPB_INLINE void google_protobuf_EnumValueDescriptorProto_set_name(google_protobuf_EnumValueDescriptorProto *msg, upb_strview value) {
+  _upb_sethas(msg, 1);
+  UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(8, 8)) = value;
+}
+UPB_INLINE void google_protobuf_EnumValueDescriptorProto_set_number(google_protobuf_EnumValueDescriptorProto *msg, int32_t value) {
+  _upb_sethas(msg, 0);
+  UPB_FIELD_AT(msg, int32_t, UPB_SIZE(4, 4)) = value;
+}
+UPB_INLINE void google_protobuf_EnumValueDescriptorProto_set_options(google_protobuf_EnumValueDescriptorProto *msg, google_protobuf_EnumValueOptions* value) {
+  _upb_sethas(msg, 2);
+  UPB_FIELD_AT(msg, google_protobuf_EnumValueOptions*, UPB_SIZE(16, 24)) = value;
+}
+UPB_INLINE struct google_protobuf_EnumValueOptions* google_protobuf_EnumValueDescriptorProto_mutable_options(google_protobuf_EnumValueDescriptorProto *msg, upb_arena *arena) {
+  struct google_protobuf_EnumValueOptions* sub = (struct google_protobuf_EnumValueOptions*)google_protobuf_EnumValueDescriptorProto_options(msg);
+  if (sub == NULL) {
+    sub = (struct google_protobuf_EnumValueOptions*)upb_msg_new(&google_protobuf_EnumValueOptions_msginit, arena);
+    if (!sub) return NULL;
+    google_protobuf_EnumValueDescriptorProto_set_options(msg, sub);
+  }
+  return sub;
+}
 
 
 /* google.protobuf.ServiceDescriptorProto */
 
-extern const upb_msglayout google_protobuf_ServiceDescriptorProto_msginit;
 UPB_INLINE google_protobuf_ServiceDescriptorProto *google_protobuf_ServiceDescriptorProto_new(upb_arena *arena) {
   return (google_protobuf_ServiceDescriptorProto *)upb_msg_new(&google_protobuf_ServiceDescriptorProto_msginit, arena);
 }
-UPB_INLINE google_protobuf_ServiceDescriptorProto *google_protobuf_ServiceDescriptorProto_parsenew(upb_stringview buf, upb_arena *arena) {
+UPB_INLINE google_protobuf_ServiceDescriptorProto *google_protobuf_ServiceDescriptorProto_parsenew(upb_strview buf, upb_arena *arena) {
   google_protobuf_ServiceDescriptorProto *ret = google_protobuf_ServiceDescriptorProto_new(arena);
   return (ret && upb_decode(buf, ret, &google_protobuf_ServiceDescriptorProto_msginit)) ? ret : NULL;
 }
@@ -427,22 +865,50 @@ UPB_INLINE char *google_protobuf_ServiceDescriptorProto_serialize(const google_p
   return upb_encode(msg, &google_protobuf_ServiceDescriptorProto_msginit, arena, len);
 }
 
-UPB_INLINE upb_stringview google_protobuf_ServiceDescriptorProto_name(const google_protobuf_ServiceDescriptorProto *msg) { return UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(8, 16)); }
-UPB_INLINE const upb_array* google_protobuf_ServiceDescriptorProto_method(const google_protobuf_ServiceDescriptorProto *msg) { return UPB_FIELD_AT(msg, const upb_array*, UPB_SIZE(20, 40)); }
-UPB_INLINE const google_protobuf_ServiceOptions* google_protobuf_ServiceDescriptorProto_options(const google_protobuf_ServiceDescriptorProto *msg) { return UPB_FIELD_AT(msg, const google_protobuf_ServiceOptions*, UPB_SIZE(16, 32)); }
+UPB_INLINE bool google_protobuf_ServiceDescriptorProto_has_name(const google_protobuf_ServiceDescriptorProto *msg) { return _upb_has_field(msg, 0); }
+UPB_INLINE upb_strview google_protobuf_ServiceDescriptorProto_name(const google_protobuf_ServiceDescriptorProto *msg) { return UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(4, 8)); }
+UPB_INLINE const google_protobuf_MethodDescriptorProto* const* google_protobuf_ServiceDescriptorProto_method(const google_protobuf_ServiceDescriptorProto *msg, size_t *len) { return (const google_protobuf_MethodDescriptorProto* const*)_upb_array_accessor(msg, UPB_SIZE(16, 32), len); }
+UPB_INLINE bool google_protobuf_ServiceDescriptorProto_has_options(const google_protobuf_ServiceDescriptorProto *msg) { return _upb_has_field(msg, 1); }
+UPB_INLINE const google_protobuf_ServiceOptions* google_protobuf_ServiceDescriptorProto_options(const google_protobuf_ServiceDescriptorProto *msg) { return UPB_FIELD_AT(msg, const google_protobuf_ServiceOptions*, UPB_SIZE(12, 24)); }
 
-UPB_INLINE void google_protobuf_ServiceDescriptorProto_set_name(google_protobuf_ServiceDescriptorProto *msg, upb_stringview value) { UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(8, 16)) = value; }
-UPB_INLINE void google_protobuf_ServiceDescriptorProto_set_method(google_protobuf_ServiceDescriptorProto *msg, upb_array* value) { UPB_FIELD_AT(msg, upb_array*, UPB_SIZE(20, 40)) = value; }
-UPB_INLINE void google_protobuf_ServiceDescriptorProto_set_options(google_protobuf_ServiceDescriptorProto *msg, google_protobuf_ServiceOptions* value) { UPB_FIELD_AT(msg, google_protobuf_ServiceOptions*, UPB_SIZE(16, 32)) = value; }
+UPB_INLINE void google_protobuf_ServiceDescriptorProto_set_name(google_protobuf_ServiceDescriptorProto *msg, upb_strview value) {
+  _upb_sethas(msg, 0);
+  UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(4, 8)) = value;
+}
+UPB_INLINE google_protobuf_MethodDescriptorProto** google_protobuf_ServiceDescriptorProto_mutable_method(google_protobuf_ServiceDescriptorProto *msg, size_t *len) {
+  return (google_protobuf_MethodDescriptorProto**)_upb_array_mutable_accessor(msg, UPB_SIZE(16, 32), len);
+}
+UPB_INLINE google_protobuf_MethodDescriptorProto** google_protobuf_ServiceDescriptorProto_resize_method(google_protobuf_ServiceDescriptorProto *msg, size_t len, upb_arena *arena) {
+  return (google_protobuf_MethodDescriptorProto**)_upb_array_resize_accessor(msg, UPB_SIZE(16, 32), len, UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, arena);
+}
+UPB_INLINE struct google_protobuf_MethodDescriptorProto* google_protobuf_ServiceDescriptorProto_add_method(google_protobuf_ServiceDescriptorProto *msg, upb_arena *arena) {
+  struct google_protobuf_MethodDescriptorProto* sub = (struct google_protobuf_MethodDescriptorProto*)upb_msg_new(&google_protobuf_MethodDescriptorProto_msginit, arena);
+  bool ok = _upb_array_append_accessor(
+      msg, UPB_SIZE(16, 32), UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, &sub, arena);
+  if (!ok) return NULL;
+  return sub;
+}
+UPB_INLINE void google_protobuf_ServiceDescriptorProto_set_options(google_protobuf_ServiceDescriptorProto *msg, google_protobuf_ServiceOptions* value) {
+  _upb_sethas(msg, 1);
+  UPB_FIELD_AT(msg, google_protobuf_ServiceOptions*, UPB_SIZE(12, 24)) = value;
+}
+UPB_INLINE struct google_protobuf_ServiceOptions* google_protobuf_ServiceDescriptorProto_mutable_options(google_protobuf_ServiceDescriptorProto *msg, upb_arena *arena) {
+  struct google_protobuf_ServiceOptions* sub = (struct google_protobuf_ServiceOptions*)google_protobuf_ServiceDescriptorProto_options(msg);
+  if (sub == NULL) {
+    sub = (struct google_protobuf_ServiceOptions*)upb_msg_new(&google_protobuf_ServiceOptions_msginit, arena);
+    if (!sub) return NULL;
+    google_protobuf_ServiceDescriptorProto_set_options(msg, sub);
+  }
+  return sub;
+}
 
 
 /* google.protobuf.MethodDescriptorProto */
 
-extern const upb_msglayout google_protobuf_MethodDescriptorProto_msginit;
 UPB_INLINE google_protobuf_MethodDescriptorProto *google_protobuf_MethodDescriptorProto_new(upb_arena *arena) {
   return (google_protobuf_MethodDescriptorProto *)upb_msg_new(&google_protobuf_MethodDescriptorProto_msginit, arena);
 }
-UPB_INLINE google_protobuf_MethodDescriptorProto *google_protobuf_MethodDescriptorProto_parsenew(upb_stringview buf, upb_arena *arena) {
+UPB_INLINE google_protobuf_MethodDescriptorProto *google_protobuf_MethodDescriptorProto_parsenew(upb_strview buf, upb_arena *arena) {
   google_protobuf_MethodDescriptorProto *ret = google_protobuf_MethodDescriptorProto_new(arena);
   return (ret && upb_decode(buf, ret, &google_protobuf_MethodDescriptorProto_msginit)) ? ret : NULL;
 }
@@ -450,28 +916,60 @@ UPB_INLINE char *google_protobuf_MethodDescriptorProto_serialize(const google_pr
   return upb_encode(msg, &google_protobuf_MethodDescriptorProto_msginit, arena, len);
 }
 
-UPB_INLINE upb_stringview google_protobuf_MethodDescriptorProto_name(const google_protobuf_MethodDescriptorProto *msg) { return UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(8, 16)); }
-UPB_INLINE upb_stringview google_protobuf_MethodDescriptorProto_input_type(const google_protobuf_MethodDescriptorProto *msg) { return UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(16, 32)); }
-UPB_INLINE upb_stringview google_protobuf_MethodDescriptorProto_output_type(const google_protobuf_MethodDescriptorProto *msg) { return UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(24, 48)); }
-UPB_INLINE const google_protobuf_MethodOptions* google_protobuf_MethodDescriptorProto_options(const google_protobuf_MethodDescriptorProto *msg) { return UPB_FIELD_AT(msg, const google_protobuf_MethodOptions*, UPB_SIZE(32, 64)); }
+UPB_INLINE bool google_protobuf_MethodDescriptorProto_has_name(const google_protobuf_MethodDescriptorProto *msg) { return _upb_has_field(msg, 2); }
+UPB_INLINE upb_strview google_protobuf_MethodDescriptorProto_name(const google_protobuf_MethodDescriptorProto *msg) { return UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(4, 8)); }
+UPB_INLINE bool google_protobuf_MethodDescriptorProto_has_input_type(const google_protobuf_MethodDescriptorProto *msg) { return _upb_has_field(msg, 3); }
+UPB_INLINE upb_strview google_protobuf_MethodDescriptorProto_input_type(const google_protobuf_MethodDescriptorProto *msg) { return UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(12, 24)); }
+UPB_INLINE bool google_protobuf_MethodDescriptorProto_has_output_type(const google_protobuf_MethodDescriptorProto *msg) { return _upb_has_field(msg, 4); }
+UPB_INLINE upb_strview google_protobuf_MethodDescriptorProto_output_type(const google_protobuf_MethodDescriptorProto *msg) { return UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(20, 40)); }
+UPB_INLINE bool google_protobuf_MethodDescriptorProto_has_options(const google_protobuf_MethodDescriptorProto *msg) { return _upb_has_field(msg, 5); }
+UPB_INLINE const google_protobuf_MethodOptions* google_protobuf_MethodDescriptorProto_options(const google_protobuf_MethodDescriptorProto *msg) { return UPB_FIELD_AT(msg, const google_protobuf_MethodOptions*, UPB_SIZE(28, 56)); }
+UPB_INLINE bool google_protobuf_MethodDescriptorProto_has_client_streaming(const google_protobuf_MethodDescriptorProto *msg) { return _upb_has_field(msg, 0); }
 UPB_INLINE bool google_protobuf_MethodDescriptorProto_client_streaming(const google_protobuf_MethodDescriptorProto *msg) { return UPB_FIELD_AT(msg, bool, UPB_SIZE(1, 1)); }
+UPB_INLINE bool google_protobuf_MethodDescriptorProto_has_server_streaming(const google_protobuf_MethodDescriptorProto *msg) { return _upb_has_field(msg, 1); }
 UPB_INLINE bool google_protobuf_MethodDescriptorProto_server_streaming(const google_protobuf_MethodDescriptorProto *msg) { return UPB_FIELD_AT(msg, bool, UPB_SIZE(2, 2)); }
 
-UPB_INLINE void google_protobuf_MethodDescriptorProto_set_name(google_protobuf_MethodDescriptorProto *msg, upb_stringview value) { UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(8, 16)) = value; }
-UPB_INLINE void google_protobuf_MethodDescriptorProto_set_input_type(google_protobuf_MethodDescriptorProto *msg, upb_stringview value) { UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(16, 32)) = value; }
-UPB_INLINE void google_protobuf_MethodDescriptorProto_set_output_type(google_protobuf_MethodDescriptorProto *msg, upb_stringview value) { UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(24, 48)) = value; }
-UPB_INLINE void google_protobuf_MethodDescriptorProto_set_options(google_protobuf_MethodDescriptorProto *msg, google_protobuf_MethodOptions* value) { UPB_FIELD_AT(msg, google_protobuf_MethodOptions*, UPB_SIZE(32, 64)) = value; }
-UPB_INLINE void google_protobuf_MethodDescriptorProto_set_client_streaming(google_protobuf_MethodDescriptorProto *msg, bool value) { UPB_FIELD_AT(msg, bool, UPB_SIZE(1, 1)) = value; }
-UPB_INLINE void google_protobuf_MethodDescriptorProto_set_server_streaming(google_protobuf_MethodDescriptorProto *msg, bool value) { UPB_FIELD_AT(msg, bool, UPB_SIZE(2, 2)) = value; }
+UPB_INLINE void google_protobuf_MethodDescriptorProto_set_name(google_protobuf_MethodDescriptorProto *msg, upb_strview value) {
+  _upb_sethas(msg, 2);
+  UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(4, 8)) = value;
+}
+UPB_INLINE void google_protobuf_MethodDescriptorProto_set_input_type(google_protobuf_MethodDescriptorProto *msg, upb_strview value) {
+  _upb_sethas(msg, 3);
+  UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(12, 24)) = value;
+}
+UPB_INLINE void google_protobuf_MethodDescriptorProto_set_output_type(google_protobuf_MethodDescriptorProto *msg, upb_strview value) {
+  _upb_sethas(msg, 4);
+  UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(20, 40)) = value;
+}
+UPB_INLINE void google_protobuf_MethodDescriptorProto_set_options(google_protobuf_MethodDescriptorProto *msg, google_protobuf_MethodOptions* value) {
+  _upb_sethas(msg, 5);
+  UPB_FIELD_AT(msg, google_protobuf_MethodOptions*, UPB_SIZE(28, 56)) = value;
+}
+UPB_INLINE struct google_protobuf_MethodOptions* google_protobuf_MethodDescriptorProto_mutable_options(google_protobuf_MethodDescriptorProto *msg, upb_arena *arena) {
+  struct google_protobuf_MethodOptions* sub = (struct google_protobuf_MethodOptions*)google_protobuf_MethodDescriptorProto_options(msg);
+  if (sub == NULL) {
+    sub = (struct google_protobuf_MethodOptions*)upb_msg_new(&google_protobuf_MethodOptions_msginit, arena);
+    if (!sub) return NULL;
+    google_protobuf_MethodDescriptorProto_set_options(msg, sub);
+  }
+  return sub;
+}
+UPB_INLINE void google_protobuf_MethodDescriptorProto_set_client_streaming(google_protobuf_MethodDescriptorProto *msg, bool value) {
+  _upb_sethas(msg, 0);
+  UPB_FIELD_AT(msg, bool, UPB_SIZE(1, 1)) = value;
+}
+UPB_INLINE void google_protobuf_MethodDescriptorProto_set_server_streaming(google_protobuf_MethodDescriptorProto *msg, bool value) {
+  _upb_sethas(msg, 1);
+  UPB_FIELD_AT(msg, bool, UPB_SIZE(2, 2)) = value;
+}
 
 
 /* google.protobuf.FileOptions */
 
-extern const upb_msglayout google_protobuf_FileOptions_msginit;
 UPB_INLINE google_protobuf_FileOptions *google_protobuf_FileOptions_new(upb_arena *arena) {
   return (google_protobuf_FileOptions *)upb_msg_new(&google_protobuf_FileOptions_msginit, arena);
 }
-UPB_INLINE google_protobuf_FileOptions *google_protobuf_FileOptions_parsenew(upb_stringview buf, upb_arena *arena) {
+UPB_INLINE google_protobuf_FileOptions *google_protobuf_FileOptions_parsenew(upb_strview buf, upb_arena *arena) {
   google_protobuf_FileOptions *ret = google_protobuf_FileOptions_new(arena);
   return (ret && upb_decode(buf, ret, &google_protobuf_FileOptions_msginit)) ? ret : NULL;
 }
@@ -479,54 +977,137 @@ UPB_INLINE char *google_protobuf_FileOptions_serialize(const google_protobuf_Fil
   return upb_encode(msg, &google_protobuf_FileOptions_msginit, arena, len);
 }
 
-UPB_INLINE upb_stringview google_protobuf_FileOptions_java_package(const google_protobuf_FileOptions *msg) { return UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(32, 32)); }
-UPB_INLINE upb_stringview google_protobuf_FileOptions_java_outer_classname(const google_protobuf_FileOptions *msg) { return UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(40, 48)); }
+UPB_INLINE bool google_protobuf_FileOptions_has_java_package(const google_protobuf_FileOptions *msg) { return _upb_has_field(msg, 10); }
+UPB_INLINE upb_strview google_protobuf_FileOptions_java_package(const google_protobuf_FileOptions *msg) { return UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(28, 32)); }
+UPB_INLINE bool google_protobuf_FileOptions_has_java_outer_classname(const google_protobuf_FileOptions *msg) { return _upb_has_field(msg, 11); }
+UPB_INLINE upb_strview google_protobuf_FileOptions_java_outer_classname(const google_protobuf_FileOptions *msg) { return UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(36, 48)); }
+UPB_INLINE bool google_protobuf_FileOptions_has_optimize_for(const google_protobuf_FileOptions *msg) { return _upb_has_field(msg, 0); }
 UPB_INLINE google_protobuf_FileOptions_OptimizeMode google_protobuf_FileOptions_optimize_for(const google_protobuf_FileOptions *msg) { return UPB_FIELD_AT(msg, google_protobuf_FileOptions_OptimizeMode, UPB_SIZE(8, 8)); }
+UPB_INLINE bool google_protobuf_FileOptions_has_java_multiple_files(const google_protobuf_FileOptions *msg) { return _upb_has_field(msg, 1); }
 UPB_INLINE bool google_protobuf_FileOptions_java_multiple_files(const google_protobuf_FileOptions *msg) { return UPB_FIELD_AT(msg, bool, UPB_SIZE(16, 16)); }
-UPB_INLINE upb_stringview google_protobuf_FileOptions_go_package(const google_protobuf_FileOptions *msg) { return UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(48, 64)); }
+UPB_INLINE bool google_protobuf_FileOptions_has_go_package(const google_protobuf_FileOptions *msg) { return _upb_has_field(msg, 12); }
+UPB_INLINE upb_strview google_protobuf_FileOptions_go_package(const google_protobuf_FileOptions *msg) { return UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(44, 64)); }
+UPB_INLINE bool google_protobuf_FileOptions_has_cc_generic_services(const google_protobuf_FileOptions *msg) { return _upb_has_field(msg, 2); }
 UPB_INLINE bool google_protobuf_FileOptions_cc_generic_services(const google_protobuf_FileOptions *msg) { return UPB_FIELD_AT(msg, bool, UPB_SIZE(17, 17)); }
+UPB_INLINE bool google_protobuf_FileOptions_has_java_generic_services(const google_protobuf_FileOptions *msg) { return _upb_has_field(msg, 3); }
 UPB_INLINE bool google_protobuf_FileOptions_java_generic_services(const google_protobuf_FileOptions *msg) { return UPB_FIELD_AT(msg, bool, UPB_SIZE(18, 18)); }
+UPB_INLINE bool google_protobuf_FileOptions_has_py_generic_services(const google_protobuf_FileOptions *msg) { return _upb_has_field(msg, 4); }
 UPB_INLINE bool google_protobuf_FileOptions_py_generic_services(const google_protobuf_FileOptions *msg) { return UPB_FIELD_AT(msg, bool, UPB_SIZE(19, 19)); }
+UPB_INLINE bool google_protobuf_FileOptions_has_java_generate_equals_and_hash(const google_protobuf_FileOptions *msg) { return _upb_has_field(msg, 5); }
 UPB_INLINE bool google_protobuf_FileOptions_java_generate_equals_and_hash(const google_protobuf_FileOptions *msg) { return UPB_FIELD_AT(msg, bool, UPB_SIZE(20, 20)); }
+UPB_INLINE bool google_protobuf_FileOptions_has_deprecated(const google_protobuf_FileOptions *msg) { return _upb_has_field(msg, 6); }
 UPB_INLINE bool google_protobuf_FileOptions_deprecated(const google_protobuf_FileOptions *msg) { return UPB_FIELD_AT(msg, bool, UPB_SIZE(21, 21)); }
+UPB_INLINE bool google_protobuf_FileOptions_has_java_string_check_utf8(const google_protobuf_FileOptions *msg) { return _upb_has_field(msg, 7); }
 UPB_INLINE bool google_protobuf_FileOptions_java_string_check_utf8(const google_protobuf_FileOptions *msg) { return UPB_FIELD_AT(msg, bool, UPB_SIZE(22, 22)); }
+UPB_INLINE bool google_protobuf_FileOptions_has_cc_enable_arenas(const google_protobuf_FileOptions *msg) { return _upb_has_field(msg, 8); }
 UPB_INLINE bool google_protobuf_FileOptions_cc_enable_arenas(const google_protobuf_FileOptions *msg) { return UPB_FIELD_AT(msg, bool, UPB_SIZE(23, 23)); }
-UPB_INLINE upb_stringview google_protobuf_FileOptions_objc_class_prefix(const google_protobuf_FileOptions *msg) { return UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(56, 80)); }
-UPB_INLINE upb_stringview google_protobuf_FileOptions_csharp_namespace(const google_protobuf_FileOptions *msg) { return UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(64, 96)); }
-UPB_INLINE upb_stringview google_protobuf_FileOptions_swift_prefix(const google_protobuf_FileOptions *msg) { return UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(72, 112)); }
-UPB_INLINE upb_stringview google_protobuf_FileOptions_php_class_prefix(const google_protobuf_FileOptions *msg) { return UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(80, 128)); }
-UPB_INLINE upb_stringview google_protobuf_FileOptions_php_namespace(const google_protobuf_FileOptions *msg) { return UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(88, 144)); }
+UPB_INLINE bool google_protobuf_FileOptions_has_objc_class_prefix(const google_protobuf_FileOptions *msg) { return _upb_has_field(msg, 13); }
+UPB_INLINE upb_strview google_protobuf_FileOptions_objc_class_prefix(const google_protobuf_FileOptions *msg) { return UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(52, 80)); }
+UPB_INLINE bool google_protobuf_FileOptions_has_csharp_namespace(const google_protobuf_FileOptions *msg) { return _upb_has_field(msg, 14); }
+UPB_INLINE upb_strview google_protobuf_FileOptions_csharp_namespace(const google_protobuf_FileOptions *msg) { return UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(60, 96)); }
+UPB_INLINE bool google_protobuf_FileOptions_has_swift_prefix(const google_protobuf_FileOptions *msg) { return _upb_has_field(msg, 15); }
+UPB_INLINE upb_strview google_protobuf_FileOptions_swift_prefix(const google_protobuf_FileOptions *msg) { return UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(68, 112)); }
+UPB_INLINE bool google_protobuf_FileOptions_has_php_class_prefix(const google_protobuf_FileOptions *msg) { return _upb_has_field(msg, 16); }
+UPB_INLINE upb_strview google_protobuf_FileOptions_php_class_prefix(const google_protobuf_FileOptions *msg) { return UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(76, 128)); }
+UPB_INLINE bool google_protobuf_FileOptions_has_php_namespace(const google_protobuf_FileOptions *msg) { return _upb_has_field(msg, 17); }
+UPB_INLINE upb_strview google_protobuf_FileOptions_php_namespace(const google_protobuf_FileOptions *msg) { return UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(84, 144)); }
+UPB_INLINE bool google_protobuf_FileOptions_has_php_generic_services(const google_protobuf_FileOptions *msg) { return _upb_has_field(msg, 9); }
 UPB_INLINE bool google_protobuf_FileOptions_php_generic_services(const google_protobuf_FileOptions *msg) { return UPB_FIELD_AT(msg, bool, UPB_SIZE(24, 24)); }
-UPB_INLINE const upb_array* google_protobuf_FileOptions_uninterpreted_option(const google_protobuf_FileOptions *msg) { return UPB_FIELD_AT(msg, const upb_array*, UPB_SIZE(96, 160)); }
-
-UPB_INLINE void google_protobuf_FileOptions_set_java_package(google_protobuf_FileOptions *msg, upb_stringview value) { UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(32, 32)) = value; }
-UPB_INLINE void google_protobuf_FileOptions_set_java_outer_classname(google_protobuf_FileOptions *msg, upb_stringview value) { UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(40, 48)) = value; }
-UPB_INLINE void google_protobuf_FileOptions_set_optimize_for(google_protobuf_FileOptions *msg, google_protobuf_FileOptions_OptimizeMode value) { UPB_FIELD_AT(msg, google_protobuf_FileOptions_OptimizeMode, UPB_SIZE(8, 8)) = value; }
-UPB_INLINE void google_protobuf_FileOptions_set_java_multiple_files(google_protobuf_FileOptions *msg, bool value) { UPB_FIELD_AT(msg, bool, UPB_SIZE(16, 16)) = value; }
-UPB_INLINE void google_protobuf_FileOptions_set_go_package(google_protobuf_FileOptions *msg, upb_stringview value) { UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(48, 64)) = value; }
-UPB_INLINE void google_protobuf_FileOptions_set_cc_generic_services(google_protobuf_FileOptions *msg, bool value) { UPB_FIELD_AT(msg, bool, UPB_SIZE(17, 17)) = value; }
-UPB_INLINE void google_protobuf_FileOptions_set_java_generic_services(google_protobuf_FileOptions *msg, bool value) { UPB_FIELD_AT(msg, bool, UPB_SIZE(18, 18)) = value; }
-UPB_INLINE void google_protobuf_FileOptions_set_py_generic_services(google_protobuf_FileOptions *msg, bool value) { UPB_FIELD_AT(msg, bool, UPB_SIZE(19, 19)) = value; }
-UPB_INLINE void google_protobuf_FileOptions_set_java_generate_equals_and_hash(google_protobuf_FileOptions *msg, bool value) { UPB_FIELD_AT(msg, bool, UPB_SIZE(20, 20)) = value; }
-UPB_INLINE void google_protobuf_FileOptions_set_deprecated(google_protobuf_FileOptions *msg, bool value) { UPB_FIELD_AT(msg, bool, UPB_SIZE(21, 21)) = value; }
-UPB_INLINE void google_protobuf_FileOptions_set_java_string_check_utf8(google_protobuf_FileOptions *msg, bool value) { UPB_FIELD_AT(msg, bool, UPB_SIZE(22, 22)) = value; }
-UPB_INLINE void google_protobuf_FileOptions_set_cc_enable_arenas(google_protobuf_FileOptions *msg, bool value) { UPB_FIELD_AT(msg, bool, UPB_SIZE(23, 23)) = value; }
-UPB_INLINE void google_protobuf_FileOptions_set_objc_class_prefix(google_protobuf_FileOptions *msg, upb_stringview value) { UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(56, 80)) = value; }
-UPB_INLINE void google_protobuf_FileOptions_set_csharp_namespace(google_protobuf_FileOptions *msg, upb_stringview value) { UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(64, 96)) = value; }
-UPB_INLINE void google_protobuf_FileOptions_set_swift_prefix(google_protobuf_FileOptions *msg, upb_stringview value) { UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(72, 112)) = value; }
-UPB_INLINE void google_protobuf_FileOptions_set_php_class_prefix(google_protobuf_FileOptions *msg, upb_stringview value) { UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(80, 128)) = value; }
-UPB_INLINE void google_protobuf_FileOptions_set_php_namespace(google_protobuf_FileOptions *msg, upb_stringview value) { UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(88, 144)) = value; }
-UPB_INLINE void google_protobuf_FileOptions_set_php_generic_services(google_protobuf_FileOptions *msg, bool value) { UPB_FIELD_AT(msg, bool, UPB_SIZE(24, 24)) = value; }
-UPB_INLINE void google_protobuf_FileOptions_set_uninterpreted_option(google_protobuf_FileOptions *msg, upb_array* value) { UPB_FIELD_AT(msg, upb_array*, UPB_SIZE(96, 160)) = value; }
+UPB_INLINE const google_protobuf_UninterpretedOption* const* google_protobuf_FileOptions_uninterpreted_option(const google_protobuf_FileOptions *msg, size_t *len) { return (const google_protobuf_UninterpretedOption* const*)_upb_array_accessor(msg, UPB_SIZE(92, 160), len); }
+
+UPB_INLINE void google_protobuf_FileOptions_set_java_package(google_protobuf_FileOptions *msg, upb_strview value) {
+  _upb_sethas(msg, 10);
+  UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(28, 32)) = value;
+}
+UPB_INLINE void google_protobuf_FileOptions_set_java_outer_classname(google_protobuf_FileOptions *msg, upb_strview value) {
+  _upb_sethas(msg, 11);
+  UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(36, 48)) = value;
+}
+UPB_INLINE void google_protobuf_FileOptions_set_optimize_for(google_protobuf_FileOptions *msg, google_protobuf_FileOptions_OptimizeMode value) {
+  _upb_sethas(msg, 0);
+  UPB_FIELD_AT(msg, google_protobuf_FileOptions_OptimizeMode, UPB_SIZE(8, 8)) = value;
+}
+UPB_INLINE void google_protobuf_FileOptions_set_java_multiple_files(google_protobuf_FileOptions *msg, bool value) {
+  _upb_sethas(msg, 1);
+  UPB_FIELD_AT(msg, bool, UPB_SIZE(16, 16)) = value;
+}
+UPB_INLINE void google_protobuf_FileOptions_set_go_package(google_protobuf_FileOptions *msg, upb_strview value) {
+  _upb_sethas(msg, 12);
+  UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(44, 64)) = value;
+}
+UPB_INLINE void google_protobuf_FileOptions_set_cc_generic_services(google_protobuf_FileOptions *msg, bool value) {
+  _upb_sethas(msg, 2);
+  UPB_FIELD_AT(msg, bool, UPB_SIZE(17, 17)) = value;
+}
+UPB_INLINE void google_protobuf_FileOptions_set_java_generic_services(google_protobuf_FileOptions *msg, bool value) {
+  _upb_sethas(msg, 3);
+  UPB_FIELD_AT(msg, bool, UPB_SIZE(18, 18)) = value;
+}
+UPB_INLINE void google_protobuf_FileOptions_set_py_generic_services(google_protobuf_FileOptions *msg, bool value) {
+  _upb_sethas(msg, 4);
+  UPB_FIELD_AT(msg, bool, UPB_SIZE(19, 19)) = value;
+}
+UPB_INLINE void google_protobuf_FileOptions_set_java_generate_equals_and_hash(google_protobuf_FileOptions *msg, bool value) {
+  _upb_sethas(msg, 5);
+  UPB_FIELD_AT(msg, bool, UPB_SIZE(20, 20)) = value;
+}
+UPB_INLINE void google_protobuf_FileOptions_set_deprecated(google_protobuf_FileOptions *msg, bool value) {
+  _upb_sethas(msg, 6);
+  UPB_FIELD_AT(msg, bool, UPB_SIZE(21, 21)) = value;
+}
+UPB_INLINE void google_protobuf_FileOptions_set_java_string_check_utf8(google_protobuf_FileOptions *msg, bool value) {
+  _upb_sethas(msg, 7);
+  UPB_FIELD_AT(msg, bool, UPB_SIZE(22, 22)) = value;
+}
+UPB_INLINE void google_protobuf_FileOptions_set_cc_enable_arenas(google_protobuf_FileOptions *msg, bool value) {
+  _upb_sethas(msg, 8);
+  UPB_FIELD_AT(msg, bool, UPB_SIZE(23, 23)) = value;
+}
+UPB_INLINE void google_protobuf_FileOptions_set_objc_class_prefix(google_protobuf_FileOptions *msg, upb_strview value) {
+  _upb_sethas(msg, 13);
+  UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(52, 80)) = value;
+}
+UPB_INLINE void google_protobuf_FileOptions_set_csharp_namespace(google_protobuf_FileOptions *msg, upb_strview value) {
+  _upb_sethas(msg, 14);
+  UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(60, 96)) = value;
+}
+UPB_INLINE void google_protobuf_FileOptions_set_swift_prefix(google_protobuf_FileOptions *msg, upb_strview value) {
+  _upb_sethas(msg, 15);
+  UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(68, 112)) = value;
+}
+UPB_INLINE void google_protobuf_FileOptions_set_php_class_prefix(google_protobuf_FileOptions *msg, upb_strview value) {
+  _upb_sethas(msg, 16);
+  UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(76, 128)) = value;
+}
+UPB_INLINE void google_protobuf_FileOptions_set_php_namespace(google_protobuf_FileOptions *msg, upb_strview value) {
+  _upb_sethas(msg, 17);
+  UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(84, 144)) = value;
+}
+UPB_INLINE void google_protobuf_FileOptions_set_php_generic_services(google_protobuf_FileOptions *msg, bool value) {
+  _upb_sethas(msg, 9);
+  UPB_FIELD_AT(msg, bool, UPB_SIZE(24, 24)) = value;
+}
+UPB_INLINE google_protobuf_UninterpretedOption** google_protobuf_FileOptions_mutable_uninterpreted_option(google_protobuf_FileOptions *msg, size_t *len) {
+  return (google_protobuf_UninterpretedOption**)_upb_array_mutable_accessor(msg, UPB_SIZE(92, 160), len);
+}
+UPB_INLINE google_protobuf_UninterpretedOption** google_protobuf_FileOptions_resize_uninterpreted_option(google_protobuf_FileOptions *msg, size_t len, upb_arena *arena) {
+  return (google_protobuf_UninterpretedOption**)_upb_array_resize_accessor(msg, UPB_SIZE(92, 160), len, UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, arena);
+}
+UPB_INLINE struct google_protobuf_UninterpretedOption* google_protobuf_FileOptions_add_uninterpreted_option(google_protobuf_FileOptions *msg, upb_arena *arena) {
+  struct google_protobuf_UninterpretedOption* sub = (struct google_protobuf_UninterpretedOption*)upb_msg_new(&google_protobuf_UninterpretedOption_msginit, arena);
+  bool ok = _upb_array_append_accessor(
+      msg, UPB_SIZE(92, 160), UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, &sub, arena);
+  if (!ok) return NULL;
+  return sub;
+}
 
 
 /* google.protobuf.MessageOptions */
 
-extern const upb_msglayout google_protobuf_MessageOptions_msginit;
 UPB_INLINE google_protobuf_MessageOptions *google_protobuf_MessageOptions_new(upb_arena *arena) {
   return (google_protobuf_MessageOptions *)upb_msg_new(&google_protobuf_MessageOptions_msginit, arena);
 }
-UPB_INLINE google_protobuf_MessageOptions *google_protobuf_MessageOptions_parsenew(upb_stringview buf, upb_arena *arena) {
+UPB_INLINE google_protobuf_MessageOptions *google_protobuf_MessageOptions_parsenew(upb_strview buf, upb_arena *arena) {
   google_protobuf_MessageOptions *ret = google_protobuf_MessageOptions_new(arena);
   return (ret && upb_decode(buf, ret, &google_protobuf_MessageOptions_msginit)) ? ret : NULL;
 }
@@ -534,26 +1115,53 @@ UPB_INLINE char *google_protobuf_MessageOptions_serialize(const google_protobuf_
   return upb_encode(msg, &google_protobuf_MessageOptions_msginit, arena, len);
 }
 
+UPB_INLINE bool google_protobuf_MessageOptions_has_message_set_wire_format(const google_protobuf_MessageOptions *msg) { return _upb_has_field(msg, 0); }
 UPB_INLINE bool google_protobuf_MessageOptions_message_set_wire_format(const google_protobuf_MessageOptions *msg) { return UPB_FIELD_AT(msg, bool, UPB_SIZE(1, 1)); }
+UPB_INLINE bool google_protobuf_MessageOptions_has_no_standard_descriptor_accessor(const google_protobuf_MessageOptions *msg) { return _upb_has_field(msg, 1); }
 UPB_INLINE bool google_protobuf_MessageOptions_no_standard_descriptor_accessor(const google_protobuf_MessageOptions *msg) { return UPB_FIELD_AT(msg, bool, UPB_SIZE(2, 2)); }
+UPB_INLINE bool google_protobuf_MessageOptions_has_deprecated(const google_protobuf_MessageOptions *msg) { return _upb_has_field(msg, 2); }
 UPB_INLINE bool google_protobuf_MessageOptions_deprecated(const google_protobuf_MessageOptions *msg) { return UPB_FIELD_AT(msg, bool, UPB_SIZE(3, 3)); }
+UPB_INLINE bool google_protobuf_MessageOptions_has_map_entry(const google_protobuf_MessageOptions *msg) { return _upb_has_field(msg, 3); }
 UPB_INLINE bool google_protobuf_MessageOptions_map_entry(const google_protobuf_MessageOptions *msg) { return UPB_FIELD_AT(msg, bool, UPB_SIZE(4, 4)); }
-UPB_INLINE const upb_array* google_protobuf_MessageOptions_uninterpreted_option(const google_protobuf_MessageOptions *msg) { return UPB_FIELD_AT(msg, const upb_array*, UPB_SIZE(8, 8)); }
+UPB_INLINE const google_protobuf_UninterpretedOption* const* google_protobuf_MessageOptions_uninterpreted_option(const google_protobuf_MessageOptions *msg, size_t *len) { return (const google_protobuf_UninterpretedOption* const*)_upb_array_accessor(msg, UPB_SIZE(8, 8), len); }
 
-UPB_INLINE void google_protobuf_MessageOptions_set_message_set_wire_format(google_protobuf_MessageOptions *msg, bool value) { UPB_FIELD_AT(msg, bool, UPB_SIZE(1, 1)) = value; }
-UPB_INLINE void google_protobuf_MessageOptions_set_no_standard_descriptor_accessor(google_protobuf_MessageOptions *msg, bool value) { UPB_FIELD_AT(msg, bool, UPB_SIZE(2, 2)) = value; }
-UPB_INLINE void google_protobuf_MessageOptions_set_deprecated(google_protobuf_MessageOptions *msg, bool value) { UPB_FIELD_AT(msg, bool, UPB_SIZE(3, 3)) = value; }
-UPB_INLINE void google_protobuf_MessageOptions_set_map_entry(google_protobuf_MessageOptions *msg, bool value) { UPB_FIELD_AT(msg, bool, UPB_SIZE(4, 4)) = value; }
-UPB_INLINE void google_protobuf_MessageOptions_set_uninterpreted_option(google_protobuf_MessageOptions *msg, upb_array* value) { UPB_FIELD_AT(msg, upb_array*, UPB_SIZE(8, 8)) = value; }
+UPB_INLINE void google_protobuf_MessageOptions_set_message_set_wire_format(google_protobuf_MessageOptions *msg, bool value) {
+  _upb_sethas(msg, 0);
+  UPB_FIELD_AT(msg, bool, UPB_SIZE(1, 1)) = value;
+}
+UPB_INLINE void google_protobuf_MessageOptions_set_no_standard_descriptor_accessor(google_protobuf_MessageOptions *msg, bool value) {
+  _upb_sethas(msg, 1);
+  UPB_FIELD_AT(msg, bool, UPB_SIZE(2, 2)) = value;
+}
+UPB_INLINE void google_protobuf_MessageOptions_set_deprecated(google_protobuf_MessageOptions *msg, bool value) {
+  _upb_sethas(msg, 2);
+  UPB_FIELD_AT(msg, bool, UPB_SIZE(3, 3)) = value;
+}
+UPB_INLINE void google_protobuf_MessageOptions_set_map_entry(google_protobuf_MessageOptions *msg, bool value) {
+  _upb_sethas(msg, 3);
+  UPB_FIELD_AT(msg, bool, UPB_SIZE(4, 4)) = value;
+}
+UPB_INLINE google_protobuf_UninterpretedOption** google_protobuf_MessageOptions_mutable_uninterpreted_option(google_protobuf_MessageOptions *msg, size_t *len) {
+  return (google_protobuf_UninterpretedOption**)_upb_array_mutable_accessor(msg, UPB_SIZE(8, 8), len);
+}
+UPB_INLINE google_protobuf_UninterpretedOption** google_protobuf_MessageOptions_resize_uninterpreted_option(google_protobuf_MessageOptions *msg, size_t len, upb_arena *arena) {
+  return (google_protobuf_UninterpretedOption**)_upb_array_resize_accessor(msg, UPB_SIZE(8, 8), len, UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, arena);
+}
+UPB_INLINE struct google_protobuf_UninterpretedOption* google_protobuf_MessageOptions_add_uninterpreted_option(google_protobuf_MessageOptions *msg, upb_arena *arena) {
+  struct google_protobuf_UninterpretedOption* sub = (struct google_protobuf_UninterpretedOption*)upb_msg_new(&google_protobuf_UninterpretedOption_msginit, arena);
+  bool ok = _upb_array_append_accessor(
+      msg, UPB_SIZE(8, 8), UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, &sub, arena);
+  if (!ok) return NULL;
+  return sub;
+}
 
 
 /* google.protobuf.FieldOptions */
 
-extern const upb_msglayout google_protobuf_FieldOptions_msginit;
 UPB_INLINE google_protobuf_FieldOptions *google_protobuf_FieldOptions_new(upb_arena *arena) {
   return (google_protobuf_FieldOptions *)upb_msg_new(&google_protobuf_FieldOptions_msginit, arena);
 }
-UPB_INLINE google_protobuf_FieldOptions *google_protobuf_FieldOptions_parsenew(upb_stringview buf, upb_arena *arena) {
+UPB_INLINE google_protobuf_FieldOptions *google_protobuf_FieldOptions_parsenew(upb_strview buf, upb_arena *arena) {
   google_protobuf_FieldOptions *ret = google_protobuf_FieldOptions_new(arena);
   return (ret && upb_decode(buf, ret, &google_protobuf_FieldOptions_msginit)) ? ret : NULL;
 }
@@ -561,30 +1169,65 @@ UPB_INLINE char *google_protobuf_FieldOptions_serialize(const google_protobuf_Fi
   return upb_encode(msg, &google_protobuf_FieldOptions_msginit, arena, len);
 }
 
+UPB_INLINE bool google_protobuf_FieldOptions_has_ctype(const google_protobuf_FieldOptions *msg) { return _upb_has_field(msg, 0); }
 UPB_INLINE google_protobuf_FieldOptions_CType google_protobuf_FieldOptions_ctype(const google_protobuf_FieldOptions *msg) { return UPB_FIELD_AT(msg, google_protobuf_FieldOptions_CType, UPB_SIZE(8, 8)); }
+UPB_INLINE bool google_protobuf_FieldOptions_has_packed(const google_protobuf_FieldOptions *msg) { return _upb_has_field(msg, 2); }
 UPB_INLINE bool google_protobuf_FieldOptions_packed(const google_protobuf_FieldOptions *msg) { return UPB_FIELD_AT(msg, bool, UPB_SIZE(24, 24)); }
+UPB_INLINE bool google_protobuf_FieldOptions_has_deprecated(const google_protobuf_FieldOptions *msg) { return _upb_has_field(msg, 3); }
 UPB_INLINE bool google_protobuf_FieldOptions_deprecated(const google_protobuf_FieldOptions *msg) { return UPB_FIELD_AT(msg, bool, UPB_SIZE(25, 25)); }
+UPB_INLINE bool google_protobuf_FieldOptions_has_lazy(const google_protobuf_FieldOptions *msg) { return _upb_has_field(msg, 4); }
 UPB_INLINE bool google_protobuf_FieldOptions_lazy(const google_protobuf_FieldOptions *msg) { return UPB_FIELD_AT(msg, bool, UPB_SIZE(26, 26)); }
+UPB_INLINE bool google_protobuf_FieldOptions_has_jstype(const google_protobuf_FieldOptions *msg) { return _upb_has_field(msg, 1); }
 UPB_INLINE google_protobuf_FieldOptions_JSType google_protobuf_FieldOptions_jstype(const google_protobuf_FieldOptions *msg) { return UPB_FIELD_AT(msg, google_protobuf_FieldOptions_JSType, UPB_SIZE(16, 16)); }
+UPB_INLINE bool google_protobuf_FieldOptions_has_weak(const google_protobuf_FieldOptions *msg) { return _upb_has_field(msg, 5); }
 UPB_INLINE bool google_protobuf_FieldOptions_weak(const google_protobuf_FieldOptions *msg) { return UPB_FIELD_AT(msg, bool, UPB_SIZE(27, 27)); }
-UPB_INLINE const upb_array* google_protobuf_FieldOptions_uninterpreted_option(const google_protobuf_FieldOptions *msg) { return UPB_FIELD_AT(msg, const upb_array*, UPB_SIZE(28, 32)); }
+UPB_INLINE const google_protobuf_UninterpretedOption* const* google_protobuf_FieldOptions_uninterpreted_option(const google_protobuf_FieldOptions *msg, size_t *len) { return (const google_protobuf_UninterpretedOption* const*)_upb_array_accessor(msg, UPB_SIZE(28, 32), len); }
 
-UPB_INLINE void google_protobuf_FieldOptions_set_ctype(google_protobuf_FieldOptions *msg, google_protobuf_FieldOptions_CType value) { UPB_FIELD_AT(msg, google_protobuf_FieldOptions_CType, UPB_SIZE(8, 8)) = value; }
-UPB_INLINE void google_protobuf_FieldOptions_set_packed(google_protobuf_FieldOptions *msg, bool value) { UPB_FIELD_AT(msg, bool, UPB_SIZE(24, 24)) = value; }
-UPB_INLINE void google_protobuf_FieldOptions_set_deprecated(google_protobuf_FieldOptions *msg, bool value) { UPB_FIELD_AT(msg, bool, UPB_SIZE(25, 25)) = value; }
-UPB_INLINE void google_protobuf_FieldOptions_set_lazy(google_protobuf_FieldOptions *msg, bool value) { UPB_FIELD_AT(msg, bool, UPB_SIZE(26, 26)) = value; }
-UPB_INLINE void google_protobuf_FieldOptions_set_jstype(google_protobuf_FieldOptions *msg, google_protobuf_FieldOptions_JSType value) { UPB_FIELD_AT(msg, google_protobuf_FieldOptions_JSType, UPB_SIZE(16, 16)) = value; }
-UPB_INLINE void google_protobuf_FieldOptions_set_weak(google_protobuf_FieldOptions *msg, bool value) { UPB_FIELD_AT(msg, bool, UPB_SIZE(27, 27)) = value; }
-UPB_INLINE void google_protobuf_FieldOptions_set_uninterpreted_option(google_protobuf_FieldOptions *msg, upb_array* value) { UPB_FIELD_AT(msg, upb_array*, UPB_SIZE(28, 32)) = value; }
+UPB_INLINE void google_protobuf_FieldOptions_set_ctype(google_protobuf_FieldOptions *msg, google_protobuf_FieldOptions_CType value) {
+  _upb_sethas(msg, 0);
+  UPB_FIELD_AT(msg, google_protobuf_FieldOptions_CType, UPB_SIZE(8, 8)) = value;
+}
+UPB_INLINE void google_protobuf_FieldOptions_set_packed(google_protobuf_FieldOptions *msg, bool value) {
+  _upb_sethas(msg, 2);
+  UPB_FIELD_AT(msg, bool, UPB_SIZE(24, 24)) = value;
+}
+UPB_INLINE void google_protobuf_FieldOptions_set_deprecated(google_protobuf_FieldOptions *msg, bool value) {
+  _upb_sethas(msg, 3);
+  UPB_FIELD_AT(msg, bool, UPB_SIZE(25, 25)) = value;
+}
+UPB_INLINE void google_protobuf_FieldOptions_set_lazy(google_protobuf_FieldOptions *msg, bool value) {
+  _upb_sethas(msg, 4);
+  UPB_FIELD_AT(msg, bool, UPB_SIZE(26, 26)) = value;
+}
+UPB_INLINE void google_protobuf_FieldOptions_set_jstype(google_protobuf_FieldOptions *msg, google_protobuf_FieldOptions_JSType value) {
+  _upb_sethas(msg, 1);
+  UPB_FIELD_AT(msg, google_protobuf_FieldOptions_JSType, UPB_SIZE(16, 16)) = value;
+}
+UPB_INLINE void google_protobuf_FieldOptions_set_weak(google_protobuf_FieldOptions *msg, bool value) {
+  _upb_sethas(msg, 5);
+  UPB_FIELD_AT(msg, bool, UPB_SIZE(27, 27)) = value;
+}
+UPB_INLINE google_protobuf_UninterpretedOption** google_protobuf_FieldOptions_mutable_uninterpreted_option(google_protobuf_FieldOptions *msg, size_t *len) {
+  return (google_protobuf_UninterpretedOption**)_upb_array_mutable_accessor(msg, UPB_SIZE(28, 32), len);
+}
+UPB_INLINE google_protobuf_UninterpretedOption** google_protobuf_FieldOptions_resize_uninterpreted_option(google_protobuf_FieldOptions *msg, size_t len, upb_arena *arena) {
+  return (google_protobuf_UninterpretedOption**)_upb_array_resize_accessor(msg, UPB_SIZE(28, 32), len, UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, arena);
+}
+UPB_INLINE struct google_protobuf_UninterpretedOption* google_protobuf_FieldOptions_add_uninterpreted_option(google_protobuf_FieldOptions *msg, upb_arena *arena) {
+  struct google_protobuf_UninterpretedOption* sub = (struct google_protobuf_UninterpretedOption*)upb_msg_new(&google_protobuf_UninterpretedOption_msginit, arena);
+  bool ok = _upb_array_append_accessor(
+      msg, UPB_SIZE(28, 32), UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, &sub, arena);
+  if (!ok) return NULL;
+  return sub;
+}
 
 
 /* google.protobuf.OneofOptions */
 
-extern const upb_msglayout google_protobuf_OneofOptions_msginit;
 UPB_INLINE google_protobuf_OneofOptions *google_protobuf_OneofOptions_new(upb_arena *arena) {
   return (google_protobuf_OneofOptions *)upb_msg_new(&google_protobuf_OneofOptions_msginit, arena);
 }
-UPB_INLINE google_protobuf_OneofOptions *google_protobuf_OneofOptions_parsenew(upb_stringview buf, upb_arena *arena) {
+UPB_INLINE google_protobuf_OneofOptions *google_protobuf_OneofOptions_parsenew(upb_strview buf, upb_arena *arena) {
   google_protobuf_OneofOptions *ret = google_protobuf_OneofOptions_new(arena);
   return (ret && upb_decode(buf, ret, &google_protobuf_OneofOptions_msginit)) ? ret : NULL;
 }
@@ -592,18 +1235,29 @@ UPB_INLINE char *google_protobuf_OneofOptions_serialize(const google_protobuf_On
   return upb_encode(msg, &google_protobuf_OneofOptions_msginit, arena, len);
 }
 
-UPB_INLINE const upb_array* google_protobuf_OneofOptions_uninterpreted_option(const google_protobuf_OneofOptions *msg) { return UPB_FIELD_AT(msg, const upb_array*, UPB_SIZE(0, 0)); }
+UPB_INLINE const google_protobuf_UninterpretedOption* const* google_protobuf_OneofOptions_uninterpreted_option(const google_protobuf_OneofOptions *msg, size_t *len) { return (const google_protobuf_UninterpretedOption* const*)_upb_array_accessor(msg, UPB_SIZE(0, 0), len); }
 
-UPB_INLINE void google_protobuf_OneofOptions_set_uninterpreted_option(google_protobuf_OneofOptions *msg, upb_array* value) { UPB_FIELD_AT(msg, upb_array*, UPB_SIZE(0, 0)) = value; }
+UPB_INLINE google_protobuf_UninterpretedOption** google_protobuf_OneofOptions_mutable_uninterpreted_option(google_protobuf_OneofOptions *msg, size_t *len) {
+  return (google_protobuf_UninterpretedOption**)_upb_array_mutable_accessor(msg, UPB_SIZE(0, 0), len);
+}
+UPB_INLINE google_protobuf_UninterpretedOption** google_protobuf_OneofOptions_resize_uninterpreted_option(google_protobuf_OneofOptions *msg, size_t len, upb_arena *arena) {
+  return (google_protobuf_UninterpretedOption**)_upb_array_resize_accessor(msg, UPB_SIZE(0, 0), len, UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, arena);
+}
+UPB_INLINE struct google_protobuf_UninterpretedOption* google_protobuf_OneofOptions_add_uninterpreted_option(google_protobuf_OneofOptions *msg, upb_arena *arena) {
+  struct google_protobuf_UninterpretedOption* sub = (struct google_protobuf_UninterpretedOption*)upb_msg_new(&google_protobuf_UninterpretedOption_msginit, arena);
+  bool ok = _upb_array_append_accessor(
+      msg, UPB_SIZE(0, 0), UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, &sub, arena);
+  if (!ok) return NULL;
+  return sub;
+}
 
 
 /* google.protobuf.EnumOptions */
 
-extern const upb_msglayout google_protobuf_EnumOptions_msginit;
 UPB_INLINE google_protobuf_EnumOptions *google_protobuf_EnumOptions_new(upb_arena *arena) {
   return (google_protobuf_EnumOptions *)upb_msg_new(&google_protobuf_EnumOptions_msginit, arena);
 }
-UPB_INLINE google_protobuf_EnumOptions *google_protobuf_EnumOptions_parsenew(upb_stringview buf, upb_arena *arena) {
+UPB_INLINE google_protobuf_EnumOptions *google_protobuf_EnumOptions_parsenew(upb_strview buf, upb_arena *arena) {
   google_protobuf_EnumOptions *ret = google_protobuf_EnumOptions_new(arena);
   return (ret && upb_decode(buf, ret, &google_protobuf_EnumOptions_msginit)) ? ret : NULL;
 }
@@ -611,22 +1265,41 @@ UPB_INLINE char *google_protobuf_EnumOptions_serialize(const google_protobuf_Enu
   return upb_encode(msg, &google_protobuf_EnumOptions_msginit, arena, len);
 }
 
+UPB_INLINE bool google_protobuf_EnumOptions_has_allow_alias(const google_protobuf_EnumOptions *msg) { return _upb_has_field(msg, 0); }
 UPB_INLINE bool google_protobuf_EnumOptions_allow_alias(const google_protobuf_EnumOptions *msg) { return UPB_FIELD_AT(msg, bool, UPB_SIZE(1, 1)); }
+UPB_INLINE bool google_protobuf_EnumOptions_has_deprecated(const google_protobuf_EnumOptions *msg) { return _upb_has_field(msg, 1); }
 UPB_INLINE bool google_protobuf_EnumOptions_deprecated(const google_protobuf_EnumOptions *msg) { return UPB_FIELD_AT(msg, bool, UPB_SIZE(2, 2)); }
-UPB_INLINE const upb_array* google_protobuf_EnumOptions_uninterpreted_option(const google_protobuf_EnumOptions *msg) { return UPB_FIELD_AT(msg, const upb_array*, UPB_SIZE(4, 8)); }
+UPB_INLINE const google_protobuf_UninterpretedOption* const* google_protobuf_EnumOptions_uninterpreted_option(const google_protobuf_EnumOptions *msg, size_t *len) { return (const google_protobuf_UninterpretedOption* const*)_upb_array_accessor(msg, UPB_SIZE(4, 8), len); }
 
-UPB_INLINE void google_protobuf_EnumOptions_set_allow_alias(google_protobuf_EnumOptions *msg, bool value) { UPB_FIELD_AT(msg, bool, UPB_SIZE(1, 1)) = value; }
-UPB_INLINE void google_protobuf_EnumOptions_set_deprecated(google_protobuf_EnumOptions *msg, bool value) { UPB_FIELD_AT(msg, bool, UPB_SIZE(2, 2)) = value; }
-UPB_INLINE void google_protobuf_EnumOptions_set_uninterpreted_option(google_protobuf_EnumOptions *msg, upb_array* value) { UPB_FIELD_AT(msg, upb_array*, UPB_SIZE(4, 8)) = value; }
+UPB_INLINE void google_protobuf_EnumOptions_set_allow_alias(google_protobuf_EnumOptions *msg, bool value) {
+  _upb_sethas(msg, 0);
+  UPB_FIELD_AT(msg, bool, UPB_SIZE(1, 1)) = value;
+}
+UPB_INLINE void google_protobuf_EnumOptions_set_deprecated(google_protobuf_EnumOptions *msg, bool value) {
+  _upb_sethas(msg, 1);
+  UPB_FIELD_AT(msg, bool, UPB_SIZE(2, 2)) = value;
+}
+UPB_INLINE google_protobuf_UninterpretedOption** google_protobuf_EnumOptions_mutable_uninterpreted_option(google_protobuf_EnumOptions *msg, size_t *len) {
+  return (google_protobuf_UninterpretedOption**)_upb_array_mutable_accessor(msg, UPB_SIZE(4, 8), len);
+}
+UPB_INLINE google_protobuf_UninterpretedOption** google_protobuf_EnumOptions_resize_uninterpreted_option(google_protobuf_EnumOptions *msg, size_t len, upb_arena *arena) {
+  return (google_protobuf_UninterpretedOption**)_upb_array_resize_accessor(msg, UPB_SIZE(4, 8), len, UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, arena);
+}
+UPB_INLINE struct google_protobuf_UninterpretedOption* google_protobuf_EnumOptions_add_uninterpreted_option(google_protobuf_EnumOptions *msg, upb_arena *arena) {
+  struct google_protobuf_UninterpretedOption* sub = (struct google_protobuf_UninterpretedOption*)upb_msg_new(&google_protobuf_UninterpretedOption_msginit, arena);
+  bool ok = _upb_array_append_accessor(
+      msg, UPB_SIZE(4, 8), UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, &sub, arena);
+  if (!ok) return NULL;
+  return sub;
+}
 
 
 /* google.protobuf.EnumValueOptions */
 
-extern const upb_msglayout google_protobuf_EnumValueOptions_msginit;
 UPB_INLINE google_protobuf_EnumValueOptions *google_protobuf_EnumValueOptions_new(upb_arena *arena) {
   return (google_protobuf_EnumValueOptions *)upb_msg_new(&google_protobuf_EnumValueOptions_msginit, arena);
 }
-UPB_INLINE google_protobuf_EnumValueOptions *google_protobuf_EnumValueOptions_parsenew(upb_stringview buf, upb_arena *arena) {
+UPB_INLINE google_protobuf_EnumValueOptions *google_protobuf_EnumValueOptions_parsenew(upb_strview buf, upb_arena *arena) {
   google_protobuf_EnumValueOptions *ret = google_protobuf_EnumValueOptions_new(arena);
   return (ret && upb_decode(buf, ret, &google_protobuf_EnumValueOptions_msginit)) ? ret : NULL;
 }
@@ -634,20 +1307,35 @@ UPB_INLINE char *google_protobuf_EnumValueOptions_serialize(const google_protobu
   return upb_encode(msg, &google_protobuf_EnumValueOptions_msginit, arena, len);
 }
 
+UPB_INLINE bool google_protobuf_EnumValueOptions_has_deprecated(const google_protobuf_EnumValueOptions *msg) { return _upb_has_field(msg, 0); }
 UPB_INLINE bool google_protobuf_EnumValueOptions_deprecated(const google_protobuf_EnumValueOptions *msg) { return UPB_FIELD_AT(msg, bool, UPB_SIZE(1, 1)); }
-UPB_INLINE const upb_array* google_protobuf_EnumValueOptions_uninterpreted_option(const google_protobuf_EnumValueOptions *msg) { return UPB_FIELD_AT(msg, const upb_array*, UPB_SIZE(4, 8)); }
+UPB_INLINE const google_protobuf_UninterpretedOption* const* google_protobuf_EnumValueOptions_uninterpreted_option(const google_protobuf_EnumValueOptions *msg, size_t *len) { return (const google_protobuf_UninterpretedOption* const*)_upb_array_accessor(msg, UPB_SIZE(4, 8), len); }
 
-UPB_INLINE void google_protobuf_EnumValueOptions_set_deprecated(google_protobuf_EnumValueOptions *msg, bool value) { UPB_FIELD_AT(msg, bool, UPB_SIZE(1, 1)) = value; }
-UPB_INLINE void google_protobuf_EnumValueOptions_set_uninterpreted_option(google_protobuf_EnumValueOptions *msg, upb_array* value) { UPB_FIELD_AT(msg, upb_array*, UPB_SIZE(4, 8)) = value; }
+UPB_INLINE void google_protobuf_EnumValueOptions_set_deprecated(google_protobuf_EnumValueOptions *msg, bool value) {
+  _upb_sethas(msg, 0);
+  UPB_FIELD_AT(msg, bool, UPB_SIZE(1, 1)) = value;
+}
+UPB_INLINE google_protobuf_UninterpretedOption** google_protobuf_EnumValueOptions_mutable_uninterpreted_option(google_protobuf_EnumValueOptions *msg, size_t *len) {
+  return (google_protobuf_UninterpretedOption**)_upb_array_mutable_accessor(msg, UPB_SIZE(4, 8), len);
+}
+UPB_INLINE google_protobuf_UninterpretedOption** google_protobuf_EnumValueOptions_resize_uninterpreted_option(google_protobuf_EnumValueOptions *msg, size_t len, upb_arena *arena) {
+  return (google_protobuf_UninterpretedOption**)_upb_array_resize_accessor(msg, UPB_SIZE(4, 8), len, UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, arena);
+}
+UPB_INLINE struct google_protobuf_UninterpretedOption* google_protobuf_EnumValueOptions_add_uninterpreted_option(google_protobuf_EnumValueOptions *msg, upb_arena *arena) {
+  struct google_protobuf_UninterpretedOption* sub = (struct google_protobuf_UninterpretedOption*)upb_msg_new(&google_protobuf_UninterpretedOption_msginit, arena);
+  bool ok = _upb_array_append_accessor(
+      msg, UPB_SIZE(4, 8), UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, &sub, arena);
+  if (!ok) return NULL;
+  return sub;
+}
 
 
 /* google.protobuf.ServiceOptions */
 
-extern const upb_msglayout google_protobuf_ServiceOptions_msginit;
 UPB_INLINE google_protobuf_ServiceOptions *google_protobuf_ServiceOptions_new(upb_arena *arena) {
   return (google_protobuf_ServiceOptions *)upb_msg_new(&google_protobuf_ServiceOptions_msginit, arena);
 }
-UPB_INLINE google_protobuf_ServiceOptions *google_protobuf_ServiceOptions_parsenew(upb_stringview buf, upb_arena *arena) {
+UPB_INLINE google_protobuf_ServiceOptions *google_protobuf_ServiceOptions_parsenew(upb_strview buf, upb_arena *arena) {
   google_protobuf_ServiceOptions *ret = google_protobuf_ServiceOptions_new(arena);
   return (ret && upb_decode(buf, ret, &google_protobuf_ServiceOptions_msginit)) ? ret : NULL;
 }
@@ -655,20 +1343,35 @@ UPB_INLINE char *google_protobuf_ServiceOptions_serialize(const google_protobuf_
   return upb_encode(msg, &google_protobuf_ServiceOptions_msginit, arena, len);
 }
 
+UPB_INLINE bool google_protobuf_ServiceOptions_has_deprecated(const google_protobuf_ServiceOptions *msg) { return _upb_has_field(msg, 0); }
 UPB_INLINE bool google_protobuf_ServiceOptions_deprecated(const google_protobuf_ServiceOptions *msg) { return UPB_FIELD_AT(msg, bool, UPB_SIZE(1, 1)); }
-UPB_INLINE const upb_array* google_protobuf_ServiceOptions_uninterpreted_option(const google_protobuf_ServiceOptions *msg) { return UPB_FIELD_AT(msg, const upb_array*, UPB_SIZE(4, 8)); }
+UPB_INLINE const google_protobuf_UninterpretedOption* const* google_protobuf_ServiceOptions_uninterpreted_option(const google_protobuf_ServiceOptions *msg, size_t *len) { return (const google_protobuf_UninterpretedOption* const*)_upb_array_accessor(msg, UPB_SIZE(4, 8), len); }
 
-UPB_INLINE void google_protobuf_ServiceOptions_set_deprecated(google_protobuf_ServiceOptions *msg, bool value) { UPB_FIELD_AT(msg, bool, UPB_SIZE(1, 1)) = value; }
-UPB_INLINE void google_protobuf_ServiceOptions_set_uninterpreted_option(google_protobuf_ServiceOptions *msg, upb_array* value) { UPB_FIELD_AT(msg, upb_array*, UPB_SIZE(4, 8)) = value; }
+UPB_INLINE void google_protobuf_ServiceOptions_set_deprecated(google_protobuf_ServiceOptions *msg, bool value) {
+  _upb_sethas(msg, 0);
+  UPB_FIELD_AT(msg, bool, UPB_SIZE(1, 1)) = value;
+}
+UPB_INLINE google_protobuf_UninterpretedOption** google_protobuf_ServiceOptions_mutable_uninterpreted_option(google_protobuf_ServiceOptions *msg, size_t *len) {
+  return (google_protobuf_UninterpretedOption**)_upb_array_mutable_accessor(msg, UPB_SIZE(4, 8), len);
+}
+UPB_INLINE google_protobuf_UninterpretedOption** google_protobuf_ServiceOptions_resize_uninterpreted_option(google_protobuf_ServiceOptions *msg, size_t len, upb_arena *arena) {
+  return (google_protobuf_UninterpretedOption**)_upb_array_resize_accessor(msg, UPB_SIZE(4, 8), len, UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, arena);
+}
+UPB_INLINE struct google_protobuf_UninterpretedOption* google_protobuf_ServiceOptions_add_uninterpreted_option(google_protobuf_ServiceOptions *msg, upb_arena *arena) {
+  struct google_protobuf_UninterpretedOption* sub = (struct google_protobuf_UninterpretedOption*)upb_msg_new(&google_protobuf_UninterpretedOption_msginit, arena);
+  bool ok = _upb_array_append_accessor(
+      msg, UPB_SIZE(4, 8), UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, &sub, arena);
+  if (!ok) return NULL;
+  return sub;
+}
 
 
 /* google.protobuf.MethodOptions */
 
-extern const upb_msglayout google_protobuf_MethodOptions_msginit;
 UPB_INLINE google_protobuf_MethodOptions *google_protobuf_MethodOptions_new(upb_arena *arena) {
   return (google_protobuf_MethodOptions *)upb_msg_new(&google_protobuf_MethodOptions_msginit, arena);
 }
-UPB_INLINE google_protobuf_MethodOptions *google_protobuf_MethodOptions_parsenew(upb_stringview buf, upb_arena *arena) {
+UPB_INLINE google_protobuf_MethodOptions *google_protobuf_MethodOptions_parsenew(upb_strview buf, upb_arena *arena) {
   google_protobuf_MethodOptions *ret = google_protobuf_MethodOptions_new(arena);
   return (ret && upb_decode(buf, ret, &google_protobuf_MethodOptions_msginit)) ? ret : NULL;
 }
@@ -676,22 +1379,41 @@ UPB_INLINE char *google_protobuf_MethodOptions_serialize(const google_protobuf_M
   return upb_encode(msg, &google_protobuf_MethodOptions_msginit, arena, len);
 }
 
+UPB_INLINE bool google_protobuf_MethodOptions_has_deprecated(const google_protobuf_MethodOptions *msg) { return _upb_has_field(msg, 1); }
 UPB_INLINE bool google_protobuf_MethodOptions_deprecated(const google_protobuf_MethodOptions *msg) { return UPB_FIELD_AT(msg, bool, UPB_SIZE(16, 16)); }
+UPB_INLINE bool google_protobuf_MethodOptions_has_idempotency_level(const google_protobuf_MethodOptions *msg) { return _upb_has_field(msg, 0); }
 UPB_INLINE google_protobuf_MethodOptions_IdempotencyLevel google_protobuf_MethodOptions_idempotency_level(const google_protobuf_MethodOptions *msg) { return UPB_FIELD_AT(msg, google_protobuf_MethodOptions_IdempotencyLevel, UPB_SIZE(8, 8)); }
-UPB_INLINE const upb_array* google_protobuf_MethodOptions_uninterpreted_option(const google_protobuf_MethodOptions *msg) { return UPB_FIELD_AT(msg, const upb_array*, UPB_SIZE(20, 24)); }
+UPB_INLINE const google_protobuf_UninterpretedOption* const* google_protobuf_MethodOptions_uninterpreted_option(const google_protobuf_MethodOptions *msg, size_t *len) { return (const google_protobuf_UninterpretedOption* const*)_upb_array_accessor(msg, UPB_SIZE(20, 24), len); }
 
-UPB_INLINE void google_protobuf_MethodOptions_set_deprecated(google_protobuf_MethodOptions *msg, bool value) { UPB_FIELD_AT(msg, bool, UPB_SIZE(16, 16)) = value; }
-UPB_INLINE void google_protobuf_MethodOptions_set_idempotency_level(google_protobuf_MethodOptions *msg, google_protobuf_MethodOptions_IdempotencyLevel value) { UPB_FIELD_AT(msg, google_protobuf_MethodOptions_IdempotencyLevel, UPB_SIZE(8, 8)) = value; }
-UPB_INLINE void google_protobuf_MethodOptions_set_uninterpreted_option(google_protobuf_MethodOptions *msg, upb_array* value) { UPB_FIELD_AT(msg, upb_array*, UPB_SIZE(20, 24)) = value; }
+UPB_INLINE void google_protobuf_MethodOptions_set_deprecated(google_protobuf_MethodOptions *msg, bool value) {
+  _upb_sethas(msg, 1);
+  UPB_FIELD_AT(msg, bool, UPB_SIZE(16, 16)) = value;
+}
+UPB_INLINE void google_protobuf_MethodOptions_set_idempotency_level(google_protobuf_MethodOptions *msg, google_protobuf_MethodOptions_IdempotencyLevel value) {
+  _upb_sethas(msg, 0);
+  UPB_FIELD_AT(msg, google_protobuf_MethodOptions_IdempotencyLevel, UPB_SIZE(8, 8)) = value;
+}
+UPB_INLINE google_protobuf_UninterpretedOption** google_protobuf_MethodOptions_mutable_uninterpreted_option(google_protobuf_MethodOptions *msg, size_t *len) {
+  return (google_protobuf_UninterpretedOption**)_upb_array_mutable_accessor(msg, UPB_SIZE(20, 24), len);
+}
+UPB_INLINE google_protobuf_UninterpretedOption** google_protobuf_MethodOptions_resize_uninterpreted_option(google_protobuf_MethodOptions *msg, size_t len, upb_arena *arena) {
+  return (google_protobuf_UninterpretedOption**)_upb_array_resize_accessor(msg, UPB_SIZE(20, 24), len, UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, arena);
+}
+UPB_INLINE struct google_protobuf_UninterpretedOption* google_protobuf_MethodOptions_add_uninterpreted_option(google_protobuf_MethodOptions *msg, upb_arena *arena) {
+  struct google_protobuf_UninterpretedOption* sub = (struct google_protobuf_UninterpretedOption*)upb_msg_new(&google_protobuf_UninterpretedOption_msginit, arena);
+  bool ok = _upb_array_append_accessor(
+      msg, UPB_SIZE(20, 24), UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, &sub, arena);
+  if (!ok) return NULL;
+  return sub;
+}
 
 
 /* google.protobuf.UninterpretedOption */
 
-extern const upb_msglayout google_protobuf_UninterpretedOption_msginit;
 UPB_INLINE google_protobuf_UninterpretedOption *google_protobuf_UninterpretedOption_new(upb_arena *arena) {
   return (google_protobuf_UninterpretedOption *)upb_msg_new(&google_protobuf_UninterpretedOption_msginit, arena);
 }
-UPB_INLINE google_protobuf_UninterpretedOption *google_protobuf_UninterpretedOption_parsenew(upb_stringview buf, upb_arena *arena) {
+UPB_INLINE google_protobuf_UninterpretedOption *google_protobuf_UninterpretedOption_parsenew(upb_strview buf, upb_arena *arena) {
   google_protobuf_UninterpretedOption *ret = google_protobuf_UninterpretedOption_new(arena);
   return (ret && upb_decode(buf, ret, &google_protobuf_UninterpretedOption_msginit)) ? ret : NULL;
 }
@@ -699,30 +1421,65 @@ UPB_INLINE char *google_protobuf_UninterpretedOption_serialize(const google_prot
   return upb_encode(msg, &google_protobuf_UninterpretedOption_msginit, arena, len);
 }
 
-UPB_INLINE const upb_array* google_protobuf_UninterpretedOption_name(const google_protobuf_UninterpretedOption *msg) { return UPB_FIELD_AT(msg, const upb_array*, UPB_SIZE(56, 80)); }
-UPB_INLINE upb_stringview google_protobuf_UninterpretedOption_identifier_value(const google_protobuf_UninterpretedOption *msg) { return UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(32, 32)); }
+UPB_INLINE const google_protobuf_UninterpretedOption_NamePart* const* google_protobuf_UninterpretedOption_name(const google_protobuf_UninterpretedOption *msg, size_t *len) { return (const google_protobuf_UninterpretedOption_NamePart* const*)_upb_array_accessor(msg, UPB_SIZE(56, 80), len); }
+UPB_INLINE bool google_protobuf_UninterpretedOption_has_identifier_value(const google_protobuf_UninterpretedOption *msg) { return _upb_has_field(msg, 3); }
+UPB_INLINE upb_strview google_protobuf_UninterpretedOption_identifier_value(const google_protobuf_UninterpretedOption *msg) { return UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(32, 32)); }
+UPB_INLINE bool google_protobuf_UninterpretedOption_has_positive_int_value(const google_protobuf_UninterpretedOption *msg) { return _upb_has_field(msg, 0); }
 UPB_INLINE uint64_t google_protobuf_UninterpretedOption_positive_int_value(const google_protobuf_UninterpretedOption *msg) { return UPB_FIELD_AT(msg, uint64_t, UPB_SIZE(8, 8)); }
+UPB_INLINE bool google_protobuf_UninterpretedOption_has_negative_int_value(const google_protobuf_UninterpretedOption *msg) { return _upb_has_field(msg, 1); }
 UPB_INLINE int64_t google_protobuf_UninterpretedOption_negative_int_value(const google_protobuf_UninterpretedOption *msg) { return UPB_FIELD_AT(msg, int64_t, UPB_SIZE(16, 16)); }
+UPB_INLINE bool google_protobuf_UninterpretedOption_has_double_value(const google_protobuf_UninterpretedOption *msg) { return _upb_has_field(msg, 2); }
 UPB_INLINE double google_protobuf_UninterpretedOption_double_value(const google_protobuf_UninterpretedOption *msg) { return UPB_FIELD_AT(msg, double, UPB_SIZE(24, 24)); }
-UPB_INLINE upb_stringview google_protobuf_UninterpretedOption_string_value(const google_protobuf_UninterpretedOption *msg) { return UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(40, 48)); }
-UPB_INLINE upb_stringview google_protobuf_UninterpretedOption_aggregate_value(const google_protobuf_UninterpretedOption *msg) { return UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(48, 64)); }
+UPB_INLINE bool google_protobuf_UninterpretedOption_has_string_value(const google_protobuf_UninterpretedOption *msg) { return _upb_has_field(msg, 4); }
+UPB_INLINE upb_strview google_protobuf_UninterpretedOption_string_value(const google_protobuf_UninterpretedOption *msg) { return UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(40, 48)); }
+UPB_INLINE bool google_protobuf_UninterpretedOption_has_aggregate_value(const google_protobuf_UninterpretedOption *msg) { return _upb_has_field(msg, 5); }
+UPB_INLINE upb_strview google_protobuf_UninterpretedOption_aggregate_value(const google_protobuf_UninterpretedOption *msg) { return UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(48, 64)); }
 
-UPB_INLINE void google_protobuf_UninterpretedOption_set_name(google_protobuf_UninterpretedOption *msg, upb_array* value) { UPB_FIELD_AT(msg, upb_array*, UPB_SIZE(56, 80)) = value; }
-UPB_INLINE void google_protobuf_UninterpretedOption_set_identifier_value(google_protobuf_UninterpretedOption *msg, upb_stringview value) { UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(32, 32)) = value; }
-UPB_INLINE void google_protobuf_UninterpretedOption_set_positive_int_value(google_protobuf_UninterpretedOption *msg, uint64_t value) { UPB_FIELD_AT(msg, uint64_t, UPB_SIZE(8, 8)) = value; }
-UPB_INLINE void google_protobuf_UninterpretedOption_set_negative_int_value(google_protobuf_UninterpretedOption *msg, int64_t value) { UPB_FIELD_AT(msg, int64_t, UPB_SIZE(16, 16)) = value; }
-UPB_INLINE void google_protobuf_UninterpretedOption_set_double_value(google_protobuf_UninterpretedOption *msg, double value) { UPB_FIELD_AT(msg, double, UPB_SIZE(24, 24)) = value; }
-UPB_INLINE void google_protobuf_UninterpretedOption_set_string_value(google_protobuf_UninterpretedOption *msg, upb_stringview value) { UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(40, 48)) = value; }
-UPB_INLINE void google_protobuf_UninterpretedOption_set_aggregate_value(google_protobuf_UninterpretedOption *msg, upb_stringview value) { UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(48, 64)) = value; }
+UPB_INLINE google_protobuf_UninterpretedOption_NamePart** google_protobuf_UninterpretedOption_mutable_name(google_protobuf_UninterpretedOption *msg, size_t *len) {
+  return (google_protobuf_UninterpretedOption_NamePart**)_upb_array_mutable_accessor(msg, UPB_SIZE(56, 80), len);
+}
+UPB_INLINE google_protobuf_UninterpretedOption_NamePart** google_protobuf_UninterpretedOption_resize_name(google_protobuf_UninterpretedOption *msg, size_t len, upb_arena *arena) {
+  return (google_protobuf_UninterpretedOption_NamePart**)_upb_array_resize_accessor(msg, UPB_SIZE(56, 80), len, UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, arena);
+}
+UPB_INLINE struct google_protobuf_UninterpretedOption_NamePart* google_protobuf_UninterpretedOption_add_name(google_protobuf_UninterpretedOption *msg, upb_arena *arena) {
+  struct google_protobuf_UninterpretedOption_NamePart* sub = (struct google_protobuf_UninterpretedOption_NamePart*)upb_msg_new(&google_protobuf_UninterpretedOption_NamePart_msginit, arena);
+  bool ok = _upb_array_append_accessor(
+      msg, UPB_SIZE(56, 80), UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, &sub, arena);
+  if (!ok) return NULL;
+  return sub;
+}
+UPB_INLINE void google_protobuf_UninterpretedOption_set_identifier_value(google_protobuf_UninterpretedOption *msg, upb_strview value) {
+  _upb_sethas(msg, 3);
+  UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(32, 32)) = value;
+}
+UPB_INLINE void google_protobuf_UninterpretedOption_set_positive_int_value(google_protobuf_UninterpretedOption *msg, uint64_t value) {
+  _upb_sethas(msg, 0);
+  UPB_FIELD_AT(msg, uint64_t, UPB_SIZE(8, 8)) = value;
+}
+UPB_INLINE void google_protobuf_UninterpretedOption_set_negative_int_value(google_protobuf_UninterpretedOption *msg, int64_t value) {
+  _upb_sethas(msg, 1);
+  UPB_FIELD_AT(msg, int64_t, UPB_SIZE(16, 16)) = value;
+}
+UPB_INLINE void google_protobuf_UninterpretedOption_set_double_value(google_protobuf_UninterpretedOption *msg, double value) {
+  _upb_sethas(msg, 2);
+  UPB_FIELD_AT(msg, double, UPB_SIZE(24, 24)) = value;
+}
+UPB_INLINE void google_protobuf_UninterpretedOption_set_string_value(google_protobuf_UninterpretedOption *msg, upb_strview value) {
+  _upb_sethas(msg, 4);
+  UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(40, 48)) = value;
+}
+UPB_INLINE void google_protobuf_UninterpretedOption_set_aggregate_value(google_protobuf_UninterpretedOption *msg, upb_strview value) {
+  _upb_sethas(msg, 5);
+  UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(48, 64)) = value;
+}
 
 
 /* google.protobuf.UninterpretedOption.NamePart */
 
-extern const upb_msglayout google_protobuf_UninterpretedOption_NamePart_msginit;
 UPB_INLINE google_protobuf_UninterpretedOption_NamePart *google_protobuf_UninterpretedOption_NamePart_new(upb_arena *arena) {
   return (google_protobuf_UninterpretedOption_NamePart *)upb_msg_new(&google_protobuf_UninterpretedOption_NamePart_msginit, arena);
 }
-UPB_INLINE google_protobuf_UninterpretedOption_NamePart *google_protobuf_UninterpretedOption_NamePart_parsenew(upb_stringview buf, upb_arena *arena) {
+UPB_INLINE google_protobuf_UninterpretedOption_NamePart *google_protobuf_UninterpretedOption_NamePart_parsenew(upb_strview buf, upb_arena *arena) {
   google_protobuf_UninterpretedOption_NamePart *ret = google_protobuf_UninterpretedOption_NamePart_new(arena);
   return (ret && upb_decode(buf, ret, &google_protobuf_UninterpretedOption_NamePart_msginit)) ? ret : NULL;
 }
@@ -730,20 +1487,27 @@ UPB_INLINE char *google_protobuf_UninterpretedOption_NamePart_serialize(const go
   return upb_encode(msg, &google_protobuf_UninterpretedOption_NamePart_msginit, arena, len);
 }
 
-UPB_INLINE upb_stringview google_protobuf_UninterpretedOption_NamePart_name_part(const google_protobuf_UninterpretedOption_NamePart *msg) { return UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(8, 16)); }
+UPB_INLINE bool google_protobuf_UninterpretedOption_NamePart_has_name_part(const google_protobuf_UninterpretedOption_NamePart *msg) { return _upb_has_field(msg, 1); }
+UPB_INLINE upb_strview google_protobuf_UninterpretedOption_NamePart_name_part(const google_protobuf_UninterpretedOption_NamePart *msg) { return UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(4, 8)); }
+UPB_INLINE bool google_protobuf_UninterpretedOption_NamePart_has_is_extension(const google_protobuf_UninterpretedOption_NamePart *msg) { return _upb_has_field(msg, 0); }
 UPB_INLINE bool google_protobuf_UninterpretedOption_NamePart_is_extension(const google_protobuf_UninterpretedOption_NamePart *msg) { return UPB_FIELD_AT(msg, bool, UPB_SIZE(1, 1)); }
 
-UPB_INLINE void google_protobuf_UninterpretedOption_NamePart_set_name_part(google_protobuf_UninterpretedOption_NamePart *msg, upb_stringview value) { UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(8, 16)) = value; }
-UPB_INLINE void google_protobuf_UninterpretedOption_NamePart_set_is_extension(google_protobuf_UninterpretedOption_NamePart *msg, bool value) { UPB_FIELD_AT(msg, bool, UPB_SIZE(1, 1)) = value; }
+UPB_INLINE void google_protobuf_UninterpretedOption_NamePart_set_name_part(google_protobuf_UninterpretedOption_NamePart *msg, upb_strview value) {
+  _upb_sethas(msg, 1);
+  UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(4, 8)) = value;
+}
+UPB_INLINE void google_protobuf_UninterpretedOption_NamePart_set_is_extension(google_protobuf_UninterpretedOption_NamePart *msg, bool value) {
+  _upb_sethas(msg, 0);
+  UPB_FIELD_AT(msg, bool, UPB_SIZE(1, 1)) = value;
+}
 
 
 /* google.protobuf.SourceCodeInfo */
 
-extern const upb_msglayout google_protobuf_SourceCodeInfo_msginit;
 UPB_INLINE google_protobuf_SourceCodeInfo *google_protobuf_SourceCodeInfo_new(upb_arena *arena) {
   return (google_protobuf_SourceCodeInfo *)upb_msg_new(&google_protobuf_SourceCodeInfo_msginit, arena);
 }
-UPB_INLINE google_protobuf_SourceCodeInfo *google_protobuf_SourceCodeInfo_parsenew(upb_stringview buf, upb_arena *arena) {
+UPB_INLINE google_protobuf_SourceCodeInfo *google_protobuf_SourceCodeInfo_parsenew(upb_strview buf, upb_arena *arena) {
   google_protobuf_SourceCodeInfo *ret = google_protobuf_SourceCodeInfo_new(arena);
   return (ret && upb_decode(buf, ret, &google_protobuf_SourceCodeInfo_msginit)) ? ret : NULL;
 }
@@ -751,18 +1515,29 @@ UPB_INLINE char *google_protobuf_SourceCodeInfo_serialize(const google_protobuf_
   return upb_encode(msg, &google_protobuf_SourceCodeInfo_msginit, arena, len);
 }
 
-UPB_INLINE const upb_array* google_protobuf_SourceCodeInfo_location(const google_protobuf_SourceCodeInfo *msg) { return UPB_FIELD_AT(msg, const upb_array*, UPB_SIZE(0, 0)); }
+UPB_INLINE const google_protobuf_SourceCodeInfo_Location* const* google_protobuf_SourceCodeInfo_location(const google_protobuf_SourceCodeInfo *msg, size_t *len) { return (const google_protobuf_SourceCodeInfo_Location* const*)_upb_array_accessor(msg, UPB_SIZE(0, 0), len); }
 
-UPB_INLINE void google_protobuf_SourceCodeInfo_set_location(google_protobuf_SourceCodeInfo *msg, upb_array* value) { UPB_FIELD_AT(msg, upb_array*, UPB_SIZE(0, 0)) = value; }
+UPB_INLINE google_protobuf_SourceCodeInfo_Location** google_protobuf_SourceCodeInfo_mutable_location(google_protobuf_SourceCodeInfo *msg, size_t *len) {
+  return (google_protobuf_SourceCodeInfo_Location**)_upb_array_mutable_accessor(msg, UPB_SIZE(0, 0), len);
+}
+UPB_INLINE google_protobuf_SourceCodeInfo_Location** google_protobuf_SourceCodeInfo_resize_location(google_protobuf_SourceCodeInfo *msg, size_t len, upb_arena *arena) {
+  return (google_protobuf_SourceCodeInfo_Location**)_upb_array_resize_accessor(msg, UPB_SIZE(0, 0), len, UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, arena);
+}
+UPB_INLINE struct google_protobuf_SourceCodeInfo_Location* google_protobuf_SourceCodeInfo_add_location(google_protobuf_SourceCodeInfo *msg, upb_arena *arena) {
+  struct google_protobuf_SourceCodeInfo_Location* sub = (struct google_protobuf_SourceCodeInfo_Location*)upb_msg_new(&google_protobuf_SourceCodeInfo_Location_msginit, arena);
+  bool ok = _upb_array_append_accessor(
+      msg, UPB_SIZE(0, 0), UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, &sub, arena);
+  if (!ok) return NULL;
+  return sub;
+}
 
 
 /* google.protobuf.SourceCodeInfo.Location */
 
-extern const upb_msglayout google_protobuf_SourceCodeInfo_Location_msginit;
 UPB_INLINE google_protobuf_SourceCodeInfo_Location *google_protobuf_SourceCodeInfo_Location_new(upb_arena *arena) {
   return (google_protobuf_SourceCodeInfo_Location *)upb_msg_new(&google_protobuf_SourceCodeInfo_Location_msginit, arena);
 }
-UPB_INLINE google_protobuf_SourceCodeInfo_Location *google_protobuf_SourceCodeInfo_Location_parsenew(upb_stringview buf, upb_arena *arena) {
+UPB_INLINE google_protobuf_SourceCodeInfo_Location *google_protobuf_SourceCodeInfo_Location_parsenew(upb_strview buf, upb_arena *arena) {
   google_protobuf_SourceCodeInfo_Location *ret = google_protobuf_SourceCodeInfo_Location_new(arena);
   return (ret && upb_decode(buf, ret, &google_protobuf_SourceCodeInfo_Location_msginit)) ? ret : NULL;
 }
@@ -770,26 +1545,60 @@ UPB_INLINE char *google_protobuf_SourceCodeInfo_Location_serialize(const google_
   return upb_encode(msg, &google_protobuf_SourceCodeInfo_Location_msginit, arena, len);
 }
 
-UPB_INLINE const upb_array* google_protobuf_SourceCodeInfo_Location_path(const google_protobuf_SourceCodeInfo_Location *msg) { return UPB_FIELD_AT(msg, const upb_array*, UPB_SIZE(24, 48)); }
-UPB_INLINE const upb_array* google_protobuf_SourceCodeInfo_Location_span(const google_protobuf_SourceCodeInfo_Location *msg) { return UPB_FIELD_AT(msg, const upb_array*, UPB_SIZE(28, 56)); }
-UPB_INLINE upb_stringview google_protobuf_SourceCodeInfo_Location_leading_comments(const google_protobuf_SourceCodeInfo_Location *msg) { return UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(8, 16)); }
-UPB_INLINE upb_stringview google_protobuf_SourceCodeInfo_Location_trailing_comments(const google_protobuf_SourceCodeInfo_Location *msg) { return UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(16, 32)); }
-UPB_INLINE const upb_array* google_protobuf_SourceCodeInfo_Location_leading_detached_comments(const google_protobuf_SourceCodeInfo_Location *msg) { return UPB_FIELD_AT(msg, const upb_array*, UPB_SIZE(32, 64)); }
+UPB_INLINE int32_t const* google_protobuf_SourceCodeInfo_Location_path(const google_protobuf_SourceCodeInfo_Location *msg, size_t *len) { return (int32_t const*)_upb_array_accessor(msg, UPB_SIZE(20, 40), len); }
+UPB_INLINE int32_t const* google_protobuf_SourceCodeInfo_Location_span(const google_protobuf_SourceCodeInfo_Location *msg, size_t *len) { return (int32_t const*)_upb_array_accessor(msg, UPB_SIZE(24, 48), len); }
+UPB_INLINE bool google_protobuf_SourceCodeInfo_Location_has_leading_comments(const google_protobuf_SourceCodeInfo_Location *msg) { return _upb_has_field(msg, 0); }
+UPB_INLINE upb_strview google_protobuf_SourceCodeInfo_Location_leading_comments(const google_protobuf_SourceCodeInfo_Location *msg) { return UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(4, 8)); }
+UPB_INLINE bool google_protobuf_SourceCodeInfo_Location_has_trailing_comments(const google_protobuf_SourceCodeInfo_Location *msg) { return _upb_has_field(msg, 1); }
+UPB_INLINE upb_strview google_protobuf_SourceCodeInfo_Location_trailing_comments(const google_protobuf_SourceCodeInfo_Location *msg) { return UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(12, 24)); }
+UPB_INLINE upb_strview const* google_protobuf_SourceCodeInfo_Location_leading_detached_comments(const google_protobuf_SourceCodeInfo_Location *msg, size_t *len) { return (upb_strview const*)_upb_array_accessor(msg, UPB_SIZE(28, 56), len); }
 
-UPB_INLINE void google_protobuf_SourceCodeInfo_Location_set_path(google_protobuf_SourceCodeInfo_Location *msg, upb_array* value) { UPB_FIELD_AT(msg, upb_array*, UPB_SIZE(24, 48)) = value; }
-UPB_INLINE void google_protobuf_SourceCodeInfo_Location_set_span(google_protobuf_SourceCodeInfo_Location *msg, upb_array* value) { UPB_FIELD_AT(msg, upb_array*, UPB_SIZE(28, 56)) = value; }
-UPB_INLINE void google_protobuf_SourceCodeInfo_Location_set_leading_comments(google_protobuf_SourceCodeInfo_Location *msg, upb_stringview value) { UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(8, 16)) = value; }
-UPB_INLINE void google_protobuf_SourceCodeInfo_Location_set_trailing_comments(google_protobuf_SourceCodeInfo_Location *msg, upb_stringview value) { UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(16, 32)) = value; }
-UPB_INLINE void google_protobuf_SourceCodeInfo_Location_set_leading_detached_comments(google_protobuf_SourceCodeInfo_Location *msg, upb_array* value) { UPB_FIELD_AT(msg, upb_array*, UPB_SIZE(32, 64)) = value; }
+UPB_INLINE int32_t* google_protobuf_SourceCodeInfo_Location_mutable_path(google_protobuf_SourceCodeInfo_Location *msg, size_t *len) {
+  return (int32_t*)_upb_array_mutable_accessor(msg, UPB_SIZE(20, 40), len);
+}
+UPB_INLINE int32_t* google_protobuf_SourceCodeInfo_Location_resize_path(google_protobuf_SourceCodeInfo_Location *msg, size_t len, upb_arena *arena) {
+  return (int32_t*)_upb_array_resize_accessor(msg, UPB_SIZE(20, 40), len, UPB_SIZE(4, 4), UPB_TYPE_INT32, arena);
+}
+UPB_INLINE bool google_protobuf_SourceCodeInfo_Location_add_path(google_protobuf_SourceCodeInfo_Location *msg, int32_t val, upb_arena *arena) {
+  return _upb_array_append_accessor(
+      msg, UPB_SIZE(20, 40), UPB_SIZE(4, 4), UPB_TYPE_INT32, &val, arena);
+}
+UPB_INLINE int32_t* google_protobuf_SourceCodeInfo_Location_mutable_span(google_protobuf_SourceCodeInfo_Location *msg, size_t *len) {
+  return (int32_t*)_upb_array_mutable_accessor(msg, UPB_SIZE(24, 48), len);
+}
+UPB_INLINE int32_t* google_protobuf_SourceCodeInfo_Location_resize_span(google_protobuf_SourceCodeInfo_Location *msg, size_t len, upb_arena *arena) {
+  return (int32_t*)_upb_array_resize_accessor(msg, UPB_SIZE(24, 48), len, UPB_SIZE(4, 4), UPB_TYPE_INT32, arena);
+}
+UPB_INLINE bool google_protobuf_SourceCodeInfo_Location_add_span(google_protobuf_SourceCodeInfo_Location *msg, int32_t val, upb_arena *arena) {
+  return _upb_array_append_accessor(
+      msg, UPB_SIZE(24, 48), UPB_SIZE(4, 4), UPB_TYPE_INT32, &val, arena);
+}
+UPB_INLINE void google_protobuf_SourceCodeInfo_Location_set_leading_comments(google_protobuf_SourceCodeInfo_Location *msg, upb_strview value) {
+  _upb_sethas(msg, 0);
+  UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(4, 8)) = value;
+}
+UPB_INLINE void google_protobuf_SourceCodeInfo_Location_set_trailing_comments(google_protobuf_SourceCodeInfo_Location *msg, upb_strview value) {
+  _upb_sethas(msg, 1);
+  UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(12, 24)) = value;
+}
+UPB_INLINE upb_strview* google_protobuf_SourceCodeInfo_Location_mutable_leading_detached_comments(google_protobuf_SourceCodeInfo_Location *msg, size_t *len) {
+  return (upb_strview*)_upb_array_mutable_accessor(msg, UPB_SIZE(28, 56), len);
+}
+UPB_INLINE upb_strview* google_protobuf_SourceCodeInfo_Location_resize_leading_detached_comments(google_protobuf_SourceCodeInfo_Location *msg, size_t len, upb_arena *arena) {
+  return (upb_strview*)_upb_array_resize_accessor(msg, UPB_SIZE(28, 56), len, UPB_SIZE(8, 16), UPB_TYPE_STRING, arena);
+}
+UPB_INLINE bool google_protobuf_SourceCodeInfo_Location_add_leading_detached_comments(google_protobuf_SourceCodeInfo_Location *msg, upb_strview val, upb_arena *arena) {
+  return _upb_array_append_accessor(
+      msg, UPB_SIZE(28, 56), UPB_SIZE(8, 16), UPB_TYPE_STRING, &val, arena);
+}
 
 
 /* google.protobuf.GeneratedCodeInfo */
 
-extern const upb_msglayout google_protobuf_GeneratedCodeInfo_msginit;
 UPB_INLINE google_protobuf_GeneratedCodeInfo *google_protobuf_GeneratedCodeInfo_new(upb_arena *arena) {
   return (google_protobuf_GeneratedCodeInfo *)upb_msg_new(&google_protobuf_GeneratedCodeInfo_msginit, arena);
 }
-UPB_INLINE google_protobuf_GeneratedCodeInfo *google_protobuf_GeneratedCodeInfo_parsenew(upb_stringview buf, upb_arena *arena) {
+UPB_INLINE google_protobuf_GeneratedCodeInfo *google_protobuf_GeneratedCodeInfo_parsenew(upb_strview buf, upb_arena *arena) {
   google_protobuf_GeneratedCodeInfo *ret = google_protobuf_GeneratedCodeInfo_new(arena);
   return (ret && upb_decode(buf, ret, &google_protobuf_GeneratedCodeInfo_msginit)) ? ret : NULL;
 }
@@ -797,18 +1606,29 @@ UPB_INLINE char *google_protobuf_GeneratedCodeInfo_serialize(const google_protob
   return upb_encode(msg, &google_protobuf_GeneratedCodeInfo_msginit, arena, len);
 }
 
-UPB_INLINE const upb_array* google_protobuf_GeneratedCodeInfo_annotation(const google_protobuf_GeneratedCodeInfo *msg) { return UPB_FIELD_AT(msg, const upb_array*, UPB_SIZE(0, 0)); }
+UPB_INLINE const google_protobuf_GeneratedCodeInfo_Annotation* const* google_protobuf_GeneratedCodeInfo_annotation(const google_protobuf_GeneratedCodeInfo *msg, size_t *len) { return (const google_protobuf_GeneratedCodeInfo_Annotation* const*)_upb_array_accessor(msg, UPB_SIZE(0, 0), len); }
 
-UPB_INLINE void google_protobuf_GeneratedCodeInfo_set_annotation(google_protobuf_GeneratedCodeInfo *msg, upb_array* value) { UPB_FIELD_AT(msg, upb_array*, UPB_SIZE(0, 0)) = value; }
+UPB_INLINE google_protobuf_GeneratedCodeInfo_Annotation** google_protobuf_GeneratedCodeInfo_mutable_annotation(google_protobuf_GeneratedCodeInfo *msg, size_t *len) {
+  return (google_protobuf_GeneratedCodeInfo_Annotation**)_upb_array_mutable_accessor(msg, UPB_SIZE(0, 0), len);
+}
+UPB_INLINE google_protobuf_GeneratedCodeInfo_Annotation** google_protobuf_GeneratedCodeInfo_resize_annotation(google_protobuf_GeneratedCodeInfo *msg, size_t len, upb_arena *arena) {
+  return (google_protobuf_GeneratedCodeInfo_Annotation**)_upb_array_resize_accessor(msg, UPB_SIZE(0, 0), len, UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, arena);
+}
+UPB_INLINE struct google_protobuf_GeneratedCodeInfo_Annotation* google_protobuf_GeneratedCodeInfo_add_annotation(google_protobuf_GeneratedCodeInfo *msg, upb_arena *arena) {
+  struct google_protobuf_GeneratedCodeInfo_Annotation* sub = (struct google_protobuf_GeneratedCodeInfo_Annotation*)upb_msg_new(&google_protobuf_GeneratedCodeInfo_Annotation_msginit, arena);
+  bool ok = _upb_array_append_accessor(
+      msg, UPB_SIZE(0, 0), UPB_SIZE(4, 8), UPB_TYPE_MESSAGE, &sub, arena);
+  if (!ok) return NULL;
+  return sub;
+}
 
 
 /* google.protobuf.GeneratedCodeInfo.Annotation */
 
-extern const upb_msglayout google_protobuf_GeneratedCodeInfo_Annotation_msginit;
 UPB_INLINE google_protobuf_GeneratedCodeInfo_Annotation *google_protobuf_GeneratedCodeInfo_Annotation_new(upb_arena *arena) {
   return (google_protobuf_GeneratedCodeInfo_Annotation *)upb_msg_new(&google_protobuf_GeneratedCodeInfo_Annotation_msginit, arena);
 }
-UPB_INLINE google_protobuf_GeneratedCodeInfo_Annotation *google_protobuf_GeneratedCodeInfo_Annotation_parsenew(upb_stringview buf, upb_arena *arena) {
+UPB_INLINE google_protobuf_GeneratedCodeInfo_Annotation *google_protobuf_GeneratedCodeInfo_Annotation_parsenew(upb_strview buf, upb_arena *arena) {
   google_protobuf_GeneratedCodeInfo_Annotation *ret = google_protobuf_GeneratedCodeInfo_Annotation_new(arena);
   return (ret && upb_decode(buf, ret, &google_protobuf_GeneratedCodeInfo_Annotation_msginit)) ? ret : NULL;
 }
@@ -816,15 +1636,36 @@ UPB_INLINE char *google_protobuf_GeneratedCodeInfo_Annotation_serialize(const go
   return upb_encode(msg, &google_protobuf_GeneratedCodeInfo_Annotation_msginit, arena, len);
 }
 
-UPB_INLINE const upb_array* google_protobuf_GeneratedCodeInfo_Annotation_path(const google_protobuf_GeneratedCodeInfo_Annotation *msg) { return UPB_FIELD_AT(msg, const upb_array*, UPB_SIZE(24, 32)); }
-UPB_INLINE upb_stringview google_protobuf_GeneratedCodeInfo_Annotation_source_file(const google_protobuf_GeneratedCodeInfo_Annotation *msg) { return UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(16, 16)); }
+UPB_INLINE int32_t const* google_protobuf_GeneratedCodeInfo_Annotation_path(const google_protobuf_GeneratedCodeInfo_Annotation *msg, size_t *len) { return (int32_t const*)_upb_array_accessor(msg, UPB_SIZE(20, 32), len); }
+UPB_INLINE bool google_protobuf_GeneratedCodeInfo_Annotation_has_source_file(const google_protobuf_GeneratedCodeInfo_Annotation *msg) { return _upb_has_field(msg, 2); }
+UPB_INLINE upb_strview google_protobuf_GeneratedCodeInfo_Annotation_source_file(const google_protobuf_GeneratedCodeInfo_Annotation *msg) { return UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(12, 16)); }
+UPB_INLINE bool google_protobuf_GeneratedCodeInfo_Annotation_has_begin(const google_protobuf_GeneratedCodeInfo_Annotation *msg) { return _upb_has_field(msg, 0); }
 UPB_INLINE int32_t google_protobuf_GeneratedCodeInfo_Annotation_begin(const google_protobuf_GeneratedCodeInfo_Annotation *msg) { return UPB_FIELD_AT(msg, int32_t, UPB_SIZE(4, 4)); }
+UPB_INLINE bool google_protobuf_GeneratedCodeInfo_Annotation_has_end(const google_protobuf_GeneratedCodeInfo_Annotation *msg) { return _upb_has_field(msg, 1); }
 UPB_INLINE int32_t google_protobuf_GeneratedCodeInfo_Annotation_end(const google_protobuf_GeneratedCodeInfo_Annotation *msg) { return UPB_FIELD_AT(msg, int32_t, UPB_SIZE(8, 8)); }
 
-UPB_INLINE void google_protobuf_GeneratedCodeInfo_Annotation_set_path(google_protobuf_GeneratedCodeInfo_Annotation *msg, upb_array* value) { UPB_FIELD_AT(msg, upb_array*, UPB_SIZE(24, 32)) = value; }
-UPB_INLINE void google_protobuf_GeneratedCodeInfo_Annotation_set_source_file(google_protobuf_GeneratedCodeInfo_Annotation *msg, upb_stringview value) { UPB_FIELD_AT(msg, upb_stringview, UPB_SIZE(16, 16)) = value; }
-UPB_INLINE void google_protobuf_GeneratedCodeInfo_Annotation_set_begin(google_protobuf_GeneratedCodeInfo_Annotation *msg, int32_t value) { UPB_FIELD_AT(msg, int32_t, UPB_SIZE(4, 4)) = value; }
-UPB_INLINE void google_protobuf_GeneratedCodeInfo_Annotation_set_end(google_protobuf_GeneratedCodeInfo_Annotation *msg, int32_t value) { UPB_FIELD_AT(msg, int32_t, UPB_SIZE(8, 8)) = value; }
+UPB_INLINE int32_t* google_protobuf_GeneratedCodeInfo_Annotation_mutable_path(google_protobuf_GeneratedCodeInfo_Annotation *msg, size_t *len) {
+  return (int32_t*)_upb_array_mutable_accessor(msg, UPB_SIZE(20, 32), len);
+}
+UPB_INLINE int32_t* google_protobuf_GeneratedCodeInfo_Annotation_resize_path(google_protobuf_GeneratedCodeInfo_Annotation *msg, size_t len, upb_arena *arena) {
+  return (int32_t*)_upb_array_resize_accessor(msg, UPB_SIZE(20, 32), len, UPB_SIZE(4, 4), UPB_TYPE_INT32, arena);
+}
+UPB_INLINE bool google_protobuf_GeneratedCodeInfo_Annotation_add_path(google_protobuf_GeneratedCodeInfo_Annotation *msg, int32_t val, upb_arena *arena) {
+  return _upb_array_append_accessor(
+      msg, UPB_SIZE(20, 32), UPB_SIZE(4, 4), UPB_TYPE_INT32, &val, arena);
+}
+UPB_INLINE void google_protobuf_GeneratedCodeInfo_Annotation_set_source_file(google_protobuf_GeneratedCodeInfo_Annotation *msg, upb_strview value) {
+  _upb_sethas(msg, 2);
+  UPB_FIELD_AT(msg, upb_strview, UPB_SIZE(12, 16)) = value;
+}
+UPB_INLINE void google_protobuf_GeneratedCodeInfo_Annotation_set_begin(google_protobuf_GeneratedCodeInfo_Annotation *msg, int32_t value) {
+  _upb_sethas(msg, 0);
+  UPB_FIELD_AT(msg, int32_t, UPB_SIZE(4, 4)) = value;
+}
+UPB_INLINE void google_protobuf_GeneratedCodeInfo_Annotation_set_end(google_protobuf_GeneratedCodeInfo_Annotation *msg, int32_t value) {
+  _upb_sethas(msg, 1);
+  UPB_FIELD_AT(msg, int32_t, UPB_SIZE(8, 8)) = value;
+}
 
 
 UPB_END_EXTERN_C
diff --git a/tests/conformance_upb.c b/tests/conformance_upb.c
index e0a7d8c..f920af9 100644
--- a/tests/conformance_upb.c
+++ b/tests/conformance_upb.c
@@ -39,7 +39,7 @@ void CheckedWrite(int fd, const void *buf, size_t len) {
   }
 }
 
-bool stringview_eql(upb_stringview view, const char *str) {
+bool stringview_eql(upb_strview view, const char *str) {
   return view.size == strlen(str) && memcmp(view.data, str, view.size) == 0;
 }
 
@@ -54,7 +54,7 @@ void DoTest(
                       proto3_msg)) {
     static const char msg[] = "Only proto3 for now.";
     conformance_ConformanceResponse_set_skipped(
-        response, upb_stringview_make(msg, sizeof(msg)));
+        response, upb_strview_make(msg, sizeof(msg)));
     return;
   }
 
@@ -62,14 +62,14 @@ void DoTest(
 
   switch (conformance_ConformanceRequest_payload_case(request)) {
     case conformance_ConformanceRequest_payload_protobuf_payload: {
-      upb_stringview payload = conformance_ConformanceRequest_protobuf_payload(request);
+      upb_strview payload = conformance_ConformanceRequest_protobuf_payload(request);
       test_message = protobuf_test_messages_proto3_TestAllTypesProto3_parsenew(
           payload, arena);
 
       if (!test_message) {
         static const char msg[] = "Parse error";
         conformance_ConformanceResponse_set_parse_error(
-            response, upb_stringview_make(msg, sizeof(msg)));
+            response, upb_strview_make(msg, sizeof(msg)));
         return;
       }
       break;
@@ -78,7 +78,7 @@ void DoTest(
     case conformance_ConformanceRequest_payload_json_payload: {
       static const char msg[] = "JSON support not yet implemented.";
       conformance_ConformanceResponse_set_skipped(
-          response, upb_stringview_make(msg, sizeof(msg)));
+          response, upb_strview_make(msg, sizeof(msg)));
       return;
     }
 
@@ -105,18 +105,18 @@ void DoTest(
       if (!serialized) {
         static const char msg[] = "Error serializing.";
         conformance_ConformanceResponse_set_serialize_error(
-            response, upb_stringview_make(msg, sizeof(msg)));
+            response, upb_strview_make(msg, sizeof(msg)));
         return;
       }
       conformance_ConformanceResponse_set_protobuf_payload(
-          response, upb_stringview_make(serialized, serialized_len));
+          response, upb_strview_make(serialized, serialized_len));
       break;
     }
 
     case conformance_JSON: {
       static const char msg[] = "JSON support not yet implemented.";
       conformance_ConformanceResponse_set_skipped(
-          response, upb_stringview_make(msg, sizeof(msg)));
+          response, upb_strview_make(msg, sizeof(msg)));
       break;
     }
 
@@ -155,7 +155,7 @@ bool DoTestIo() {
   }
 
   request = conformance_ConformanceRequest_parsenew(
-      upb_stringview_make(serialized_input, input_size), &arena);
+      upb_strview_make(serialized_input, input_size), &arena);
   response = conformance_ConformanceResponse_new(&arena);
 
   if (request) {
diff --git a/tests/json/test.upbdefs.c b/tests/json/test.upbdefs.c
index 933fe5f..826be52 100644
--- a/tests/json/test.upbdefs.c
+++ b/tests/json/test.upbdefs.c
@@ -7,8 +7,6 @@
  * regenerated. */
 
 #include "upb/def.h"
-#include "upb/structdefs.int.h"
-
 static const upb_msgdef msgs[8];
 static const upb_fielddef fields[37];
 static const upb_enumdef enums[1];
diff --git a/tools/amalgamate.py b/tools/amalgamate.py
index 4739a94..038c83f 100755
--- a/tools/amalgamate.py
+++ b/tools/amalgamate.py
@@ -16,11 +16,11 @@ class Amalgamator:
     self.output_h = open(output_path + "upb.h", "w")
     self.output_c = open(output_path + "upb.c", "w")
 
-    self.output_c.write("// Amalgamated source file\n")
+    self.output_c.write("/* Amalgamated source file */\n")
     self.output_c.write('#include "upb.h"\n')
     self.output_c.write(open("upb/port_def.inc").read())
 
-    self.output_h.write("// Amalgamated source file\n")
+    self.output_h.write("/* Amalgamated source file */\n")
     self.output_h.write(open("upb/port_def.inc").read())
 
   def finish(self):
diff --git a/tools/dump_cinit.lua b/tools/dump_cinit.lua
index 34d6ac6..183fef8 100644
--- a/tools/dump_cinit.lua
+++ b/tools/dump_cinit.lua
@@ -433,7 +433,6 @@ local function dump_defs_c(filedef, append)
   -- Emit forward declarations.
   emit_file_warning(filedef, append)
   append('#include "upb/def.h"\n')
-  append('#include "upb/structdefs.int.h"\n\n')
   append("static const upb_msgdef %s;\n", linktab:cdecl(upb.DEF_MSG))
   append("static const upb_fielddef %s;\n", linktab:cdecl(upb.DEF_FIELD))
   if not linktab:empty(upb.DEF_ENUM) then
diff --git a/tools/make_cmakelists.py b/tools/make_cmakelists.py
index b8f46b9..d863e7e 100755
--- a/tools/make_cmakelists.py
+++ b/tools/make_cmakelists.py
@@ -123,9 +123,15 @@ class BuildFileFunctions(object):
   def genrule(self, **kwargs):
     pass
 
-  def glob(*args):
+  def glob(self, *args):
     return []
 
+  def map_dep(self, dep):
+    return dep
+
+  def licenses(self, *args):
+    pass
+
 
 class WorkspaceFileFunctions(object):
   def __init__(self, converter):
diff --git a/upb/bindings/lua/upb/pb.c b/upb/bindings/lua/upb/pb.c
index bca2ee8..b5284df 100644
--- a/upb/bindings/lua/upb/pb.c
+++ b/upb/bindings/lua/upb/pb.c
@@ -16,7 +16,7 @@ static int lupb_pb_decode(lua_State *L) {
   const upb_msglayout *layout;
   upb_msg *msg = lupb_msg_checkmsg2(L, 1, &layout);
   const char *pb = lua_tolstring(L, 2, &len);
-  upb_stringview buf = upb_stringview_make(pb, len);
+  upb_strview buf = upb_strview_make(pb, len);
 
   upb_decode(buf, msg, layout);
   /* TODO(haberman): check for error. */
diff --git a/upb/bindings/lua/upb/table.c b/upb/bindings/lua/upb/table.c
index 79120c7..3a9319d 100644
--- a/upb/bindings/lua/upb/table.c
+++ b/upb/bindings/lua/upb/table.c
@@ -21,7 +21,6 @@
 #include "lauxlib.h"
 #include "upb/bindings/lua/upb.h"
 #include "upb/def.h"
-#include "upb/structdefs.int.h"
 #include "upb/table.int.h"
 
 static void lupbtable_setnum(lua_State *L, int tab, const char *key,
diff --git a/upb/decode.c b/upb/decode.c
index fc0e644..c54ee3c 100644
--- a/upb/decode.c
+++ b/upb/decode.c
@@ -112,14 +112,14 @@ static int64_t upb_zzdecode_64(uint64_t n) {
 }
 
 static bool upb_decode_string(const char **ptr, const char *limit,
-                              upb_stringview *val) {
+                              upb_strview *val) {
   uint32_t len;
 
   CHK(upb_decode_varint32(ptr, limit, &len) &&
       len < INT32_MAX &&
       limit - *ptr >= (int32_t)len);
 
-  *val = upb_stringview_make(*ptr, len);
+  *val = upb_strview_make(*ptr, len);
   *ptr += len;
   return true;
 }
@@ -150,7 +150,7 @@ static bool upb_skip_unknownfielddata(upb_decstate *d, upb_decframe *frame,
       return upb_decode_64bit(&d->ptr, frame->limit, &val);
     }
     case UPB_WIRE_TYPE_DELIMITED: {
-      upb_stringview val;
+      upb_strview val;
       return upb_decode_string(&d->ptr, frame->limit, &val);
     }
     case UPB_WIRE_TYPE_START_GROUP:
@@ -374,7 +374,7 @@ static bool upb_decode_32bitfield(upb_decstate *d, upb_decframe *frame,
   return true;
 }
 
-static bool upb_decode_fixedpacked(upb_array *arr, upb_stringview data,
+static bool upb_decode_fixedpacked(upb_array *arr, upb_strview data,
                                    int elem_size) {
   int elements = data.size / elem_size;
   void *field_mem;
@@ -389,7 +389,7 @@ static bool upb_decode_fixedpacked(upb_array *arr, upb_stringview data,
 static bool upb_decode_toarray(upb_decstate *d, upb_decframe *frame,
                                const char *field_start,
                                const upb_msglayout_field *field,
-                               upb_stringview val) {
+                               upb_strview val) {
   upb_array *arr = upb_getorcreatearr(frame, field);
 
 #define VARINT_CASE(ctype, decode) { \
@@ -470,7 +470,7 @@ static bool upb_decode_toarray(upb_decstate *d, upb_decframe *frame,
 static bool upb_decode_delimitedfield(upb_decstate *d, upb_decframe *frame,
                                       const char *field_start,
                                       const upb_msglayout_field *field) {
-  upb_stringview val;
+  upb_strview val;
 
   CHK(upb_decode_string(&d->ptr, frame->limit, &val));
 
@@ -584,7 +584,7 @@ static bool upb_decode_message(upb_decstate *d, const char *limit,
   return true;
 }
 
-bool upb_decode(upb_stringview buf, void *msg, const upb_msglayout *l) {
+bool upb_decode(upb_strview buf, void *msg, const upb_msglayout *l) {
   upb_decstate state;
   state.ptr = buf.data;
 
diff --git a/upb/decode.h b/upb/decode.h
index 79774ed..dee4c0f 100644
--- a/upb/decode.h
+++ b/upb/decode.h
@@ -9,7 +9,7 @@
 
 UPB_BEGIN_EXTERN_C
 
-bool upb_decode(upb_stringview buf, upb_msg *msg, const upb_msglayout *l);
+bool upb_decode(upb_strview buf, upb_msg *msg, const upb_msglayout *l);
 
 UPB_END_EXTERN_C
 
diff --git a/upb/def.c b/upb/def.c
index 223fb1d..8adf8c1 100644
--- a/upb/def.c
+++ b/upb/def.c
@@ -4,7 +4,6 @@
 #include <ctype.h>
 #include <stdlib.h>
 #include <string.h>
-#include "upb/structdefs.int.h"
 #include "upb/handlers.h"
 
 typedef struct {
@@ -665,6 +664,8 @@ static void freefield(upb_refcounted *r) {
   upb_fielddef_uninit_default(f);
   if (f->subdef_is_symbolic)
     upb_gfree(f->sub.name);
+  if (f->msg_is_symbolic)
+    upb_gfree(f->msg.name);
   upb_def_uninit(upb_fielddef_upcast_mutable(f));
   upb_gfree(f);
 }
@@ -1022,7 +1023,7 @@ bool upb_fielddef_setnumber(upb_fielddef *f, uint32_t number, upb_status *s) {
         s, "cannot change field number after adding to a message");
     return false;
   }
-  if (number == 0 || number > UPB_MAX_FIELDNUMBER) {
+  if (number == 0) {
     upb_status_seterrf(s, "invalid field number (%u)", number);
     return false;
   }
diff --git a/upb/def.h b/upb/def.h
index 19b2a20..ea22e40 100644
--- a/upb/def.h
+++ b/upb/def.h
@@ -118,9 +118,24 @@ class upb::Def {
 
  private:
   UPB_DISALLOW_POD_OPS(Def, upb::Def)
+#else
+struct upb_def {
+  upb_refcounted base;
+
+  const char *fullname;
+  const upb_filedef* file;
+  char type;  /* A upb_deftype_t (char to save space) */
+
+  /* Used as a flag during the def's mutable stage.  Must be false unless
+   * it is currently being used by a function on the stack.  This allows
+   * us to easily determine which defs were passed into the function's
+   * current invocation. */
+  bool came_from_user;
+#endif
 };
 
-#endif  /* __cplusplus */
+#define UPB_DEF_INIT(name, type, vtbl, refs, ref2s) \
+    { UPB_REFCOUNT_INIT(vtbl, refs, ref2s), name, NULL, type, false }
 
 UPB_BEGIN_EXTERN_C
 
@@ -583,12 +598,57 @@ class upb::FieldDef {
 
  private:
   UPB_DISALLOW_POD_OPS(FieldDef, upb::FieldDef)
-};
-
+#else
+struct upb_fielddef {
+  upb_def base;
+
+  union {
+    int64_t sint;
+    uint64_t uint;
+    double dbl;
+    float flt;
+    void *bytes;
+  } defaultval;
+  union {
+    const upb_msgdef *def;  /* If !msg_is_symbolic. */
+    char *name;             /* If msg_is_symbolic. */
+  } msg;
+  union {
+    const upb_def *def;  /* If !subdef_is_symbolic. */
+    char *name;          /* If subdef_is_symbolic. */
+  } sub;  /* The msgdef or enumdef for this field, if upb_hassubdef(f). */
+  bool subdef_is_symbolic;
+  bool msg_is_symbolic;
+  const upb_oneofdef *oneof;
+  bool default_is_string;
+  bool type_is_set_;     /* False until type is explicitly set. */
+  bool is_extension_;
+  bool lazy_;
+  bool packed_;
+  upb_intfmt_t intfmt;
+  bool tagdelim;
+  upb_fieldtype_t type_;
+  upb_label_t label_;
+  uint32_t number_;
+  uint32_t selector_base;  /* Used to index into a upb::Handlers table. */
+  uint32_t index_;
 # endif  /* defined(__cplusplus) */
+};
 
 UPB_BEGIN_EXTERN_C
 
+extern const struct upb_refcounted_vtbl upb_fielddef_vtbl;
+
+#define UPB_FIELDDEF_INIT(label, type, intfmt, tagdelim, is_extension, lazy,   \
+                          packed, name, num, msgdef, subdef, selector_base,    \
+                          index, defaultval, refs, ref2s)                      \
+  {                                                                            \
+    UPB_DEF_INIT(name, UPB_DEF_FIELD, &upb_fielddef_vtbl, refs, ref2s),        \
+        defaultval, {msgdef}, {subdef}, NULL, false, false,                    \
+        type == UPB_TYPE_STRING || type == UPB_TYPE_BYTES, true, is_extension, \
+        lazy, packed, intfmt, tagdelim, type, label, num, selector_base, index \
+  }
+
 /* Native C API. */
 upb_fielddef *upb_fielddef_new(const void *owner);
 
@@ -938,12 +998,45 @@ class upb::MessageDef {
 
  private:
   UPB_DISALLOW_POD_OPS(MessageDef, upb::MessageDef)
-};
+#else
+struct upb_msgdef {
+  upb_def base;
+
+  size_t selector_count;
+  uint32_t submsg_field_count;
+
+  /* Tables for looking up fields by number and name. */
+  upb_inttable itof;  /* int to field */
+  upb_strtable ntof;  /* name to field/oneof */
+
+  /* Is this a map-entry message? */
+  bool map_entry;
+
+  /* Whether this message has proto2 or proto3 semantics. */
+  upb_syntax_t syntax;
 
+  /* Type of well known type message. UPB_WELLKNOWN_UNSPECIFIED for
+   * non-well-known message. */
+  upb_wellknowntype_t well_known_type;
+
+  /* TODO(haberman): proper extension ranges (there can be multiple). */
 #endif  /* __cplusplus */
+};
 
 UPB_BEGIN_EXTERN_C
 
+extern const struct upb_refcounted_vtbl upb_msgdef_vtbl;
+
+/* TODO: also support static initialization of the oneofs table. This will be
+ * needed if we compile in descriptors that contain oneofs. */
+#define UPB_MSGDEF_INIT(name, selector_count, submsg_field_count, itof, ntof, \
+                        map_entry, syntax, well_known_type, refs, ref2s)      \
+  {                                                                           \
+    UPB_DEF_INIT(name, UPB_DEF_MSG, &upb_fielddef_vtbl, refs, ref2s),         \
+        selector_count, submsg_field_count, itof, ntof, map_entry, syntax,    \
+        well_known_type                                                       \
+  }
+
 /* Returns NULL if memory allocation failed. */
 upb_msgdef *upb_msgdef_new(const void *owner);
 
@@ -1122,12 +1215,24 @@ class upb::EnumDef {
 
  private:
   UPB_DISALLOW_POD_OPS(EnumDef, upb::EnumDef)
-};
+#else
+struct upb_enumdef {
+  upb_def base;
 
+  upb_strtable ntoi;
+  upb_inttable iton;
+  int32_t defaultval;
 #endif  /* __cplusplus */
+};
 
 UPB_BEGIN_EXTERN_C
 
+extern const struct upb_refcounted_vtbl upb_enumdef_vtbl;
+
+#define UPB_ENUMDEF_INIT(name, ntoi, iton, defaultval, refs, ref2s) \
+  { UPB_DEF_INIT(name, UPB_DEF_ENUM, &upb_enumdef_vtbl, refs, ref2s), ntoi,    \
+    iton, defaultval }
+
 /* Native C API. */
 upb_enumdef *upb_enumdef_new(const void *owner);
 
@@ -1276,12 +1381,25 @@ class upb::OneofDef {
 
  private:
   UPB_DISALLOW_POD_OPS(OneofDef, upb::OneofDef)
-};
-
+#else
+struct upb_oneofdef {
+  upb_refcounted base;
+
+  uint32_t index;  /* Index within oneofs. */
+  const char *name;
+  upb_strtable ntof;
+  upb_inttable itof;
+  const upb_msgdef *parent;
 #endif  /* __cplusplus */
+};
 
 UPB_BEGIN_EXTERN_C
 
+extern const struct upb_refcounted_vtbl upb_oneofdef_vtbl;
+
+#define UPB_ONEOFDEF_INIT(name, ntof, itof, refs, ref2s) \
+  { UPB_REFCOUNT_INIT(&upb_oneofdef_vtbl, refs, ref2s), 0, name, ntof, itof }
+
 /* Native C API. */
 upb_oneofdef *upb_oneofdef_new(const void *owner);
 
@@ -1400,12 +1518,25 @@ class upb::FileDef {
 
  private:
   UPB_DISALLOW_POD_OPS(FileDef, upb::FileDef)
-};
+#else
+struct upb_filedef {
+  upb_refcounted base;
+
+  const char *name;
+  const char *package;
+  const char *phpprefix;
+  const char *phpnamespace;
+  upb_syntax_t syntax;
 
+  upb_inttable defs;
+  upb_inttable deps;
 #endif
+};
 
 UPB_BEGIN_EXTERN_C
 
+extern const struct upb_refcounted_vtbl upb_filedef_vtbl;
+
 upb_filedef *upb_filedef_new(const void *owner);
 
 /* Include upb_refcounted methods like upb_msgdef_ref(). */
@@ -1535,9 +1666,13 @@ class upb::SymbolTable {
 
  private:
   UPB_DISALLOW_POD_OPS(SymbolTable, upb::SymbolTable)
-};
+#else
+struct upb_symtab {
+  upb_refcounted base;
 
+  upb_strtable symtab;
 #endif  /* __cplusplus */
+};
 
 UPB_BEGIN_EXTERN_C
 
diff --git a/upb/descriptor/descriptor.upbdefs.c b/upb/descriptor/descriptor.upbdefs.c
index fa5bb3b..d91f674 100644
--- a/upb/descriptor/descriptor.upbdefs.c
+++ b/upb/descriptor/descriptor.upbdefs.c
@@ -7,8 +7,6 @@
  * regenerated. */
 
 #include "upb/def.h"
-#include "upb/structdefs.int.h"
-
 static const upb_msgdef msgs[22];
 static const upb_fielddef fields[107];
 static const upb_enumdef enums[5];
diff --git a/upb/descriptor/reader.c b/upb/descriptor/reader.c
index 054ebd2..fd219fe 100644
--- a/upb/descriptor/reader.c
+++ b/upb/descriptor/reader.c
@@ -321,14 +321,21 @@ static void *file_startenum(void *closure, const void *hd) {
 
 static void *file_startext(void *closure, const void *hd) {
   upb_descreader *r = closure;
-  bool ok;
   r->f = upb_fielddef_new(r);
-  ok = upb_filedef_addext(r->file, r->f, r, NULL);
   UPB_UNUSED(hd);
-  UPB_ASSERT(ok);
   return r;
 }
 
+static bool file_endext(void *closure, const void *hd) {
+  /* The current symtab code can't handle extensions, so we just discard
+   * them for now. */
+  upb_descreader *r = closure;
+  upb_fielddef_unref(r->f, r);
+  UPB_UNUSED(hd);
+  r->f = NULL;
+  return true;
+}
+
 static size_t file_ondep(void *closure, const void *hd, const char *buf,
                          size_t n, const upb_bufhandle *handle) {
   upb_descreader *r = closure;
@@ -702,13 +709,21 @@ static void *msg_startmsg(void *closure, const void *hd) {
 
 static void *msg_startext(void *closure, const void *hd) {
   upb_descreader *r = closure;
-  upb_fielddef *f = upb_fielddef_new(&f);
-  bool ok = upb_filedef_addext(r->file, f, &f, NULL);
+  r->f = upb_fielddef_new(r);
   UPB_UNUSED(hd);
-  UPB_ASSERT(ok);
   return r;
 }
 
+static bool msg_endext(void *closure, const void *hd) {
+  /* The current symtab code can't handle extensions, so we just discard
+   * them for now. */
+  upb_descreader *r = closure;
+  upb_fielddef_unref(r->f, r);
+  UPB_UNUSED(hd);
+  r->f = NULL;
+  return true;
+}
+
 static void *msg_startfield(void *closure, const void *hd) {
   upb_descreader *r = closure;
   r->f = upb_fielddef_new(&r->f);
@@ -763,6 +778,8 @@ static void reghandlers(const void *closure, upb_handlers *h) {
     upb_handlers_setstring(h, F(DescriptorProto, name), &msg_name, NULL);
     upb_handlers_setstartsubmsg(h, F(DescriptorProto, extension), &msg_startext,
                                 NULL);
+    upb_handlers_setendsubmsg(h, F(DescriptorProto, extension), &msg_endext,
+                              NULL);
     upb_handlers_setstartsubmsg(h, F(DescriptorProto, nested_type),
                                 &msg_startmsg, NULL);
     upb_handlers_setstartsubmsg(h, F(DescriptorProto, field),
@@ -786,6 +803,8 @@ static void reghandlers(const void *closure, upb_handlers *h) {
                                 &file_startenum, NULL);
     upb_handlers_setstartsubmsg(h, F(FileDescriptorProto, extension),
                                 &file_startext, NULL);
+    upb_handlers_setendsubmsg(h, F(FileDescriptorProto, extension),
+                              &file_endext, NULL);
     upb_handlers_setstring(h, F(FileDescriptorProto, dependency),
                            &file_ondep, NULL);
   } else if (upbdefs_google_protobuf_EnumValueDescriptorProto_is(m)) {
diff --git a/upb/encode.c b/upb/encode.c
index bff8262..b728353 100644
--- a/upb/encode.c
+++ b/upb/encode.c
@@ -207,8 +207,8 @@ do { ; } while(0)
       VARINT_CASE(int64_t, upb_zzencode_64(*ptr));
     case UPB_DESCRIPTOR_TYPE_STRING:
     case UPB_DESCRIPTOR_TYPE_BYTES: {
-      upb_stringview *start = arr->data;
-      upb_stringview *ptr = start + arr->len;
+      upb_strview *start = arr->data;
+      upb_strview *ptr = start + arr->len;
       do {
         ptr--;
         CHK(upb_put_bytes(e, ptr->data, ptr->size) &&
@@ -292,7 +292,7 @@ static bool upb_encode_scalarfield(upb_encstate *e, const char *field_mem,
       CASE(int64_t, varint, UPB_WIRE_TYPE_VARINT, upb_zzencode_64(val));
     case UPB_DESCRIPTOR_TYPE_STRING:
     case UPB_DESCRIPTOR_TYPE_BYTES: {
-      upb_stringview view = *(upb_stringview*)field_mem;
+      upb_strview view = *(upb_strview*)field_mem;
       if (skip_zero_value && view.size == 0) {
         return true;
       }
diff --git a/upb/generated_util.h b/upb/generated_util.h
new file mode 100644
index 0000000..bd47389
--- /dev/null
+++ b/upb/generated_util.h
@@ -0,0 +1,102 @@
+/*
+** Functions for use by generated code.  These are not public and users must
+** not call them directly.
+*/
+
+#ifndef UPB_GENERATED_UTIL_H_
+#define UPB_GENERATED_UTIL_H_
+
+#include <stdint.h>
+#include "upb/structs.int.h"
+
+#define PTR_AT(msg, ofs, type) (type*)((const char*)msg + ofs)
+
+UPB_INLINE const void *_upb_array_accessor(const void *msg, size_t ofs,
+                                           size_t *size) {
+  const upb_array *arr = *PTR_AT(msg, ofs, const upb_array*);
+  if (arr) {
+    if (size) *size = arr->size;
+    return arr->data;
+  } else {
+    if (size) *size = 0;
+    return NULL;
+  }
+}
+
+UPB_INLINE void *_upb_array_mutable_accessor(void *msg, size_t ofs,
+                                             size_t *size) {
+  upb_array *arr = *PTR_AT(msg, ofs, upb_array*);
+  if (arr) {
+    if (size) *size = arr->size;
+    return arr->data;
+  } else {
+    if (size) *size = 0;
+    return NULL;
+  }
+}
+
+/* TODO(haberman): this is a mess.  It will improve when upb_array no longer
+ * carries reflective state (type, elem_size). */
+UPB_INLINE void *_upb_array_resize_accessor(void *msg, size_t ofs, size_t size,
+                                            size_t elem_size,
+                                            upb_fieldtype_t type,
+                                            upb_arena *arena) {
+  upb_array *arr = *PTR_AT(msg, ofs, upb_array*);
+
+  if (!arr) {
+    arr = upb_array_new(type, arena);
+    if (!arr) return NULL;
+    *PTR_AT(msg, ofs, upb_array*) = arr;
+  }
+
+  if (size > arr->size) {
+    size_t new_size = UPB_MAX(arr->size, 4);
+    size_t old_bytes = arr->size * elem_size;
+    size_t new_bytes;
+    upb_alloc *alloc = upb_arena_alloc(arr->arena);
+    while (new_size < size) new_size *= 2;
+    new_bytes = new_size * elem_size;
+    arr->data = upb_realloc(alloc, arr->data, old_bytes, new_bytes);
+    if (!arr->data) {
+      return NULL;
+    }
+    arr->size = new_size;
+  }
+
+  arr->len = size;
+  return arr->data;
+}
+
+UPB_INLINE bool _upb_array_append_accessor(void *msg, size_t ofs,
+                                           size_t elem_size,
+                                           upb_fieldtype_t type,
+                                           const void *value,
+                                           upb_arena *arena) {
+  upb_array *arr = *PTR_AT(msg, ofs, upb_array*);
+  size_t i = arr ? arr->len : 0;
+  void *data =
+      _upb_array_resize_accessor(msg, ofs, i + 1, elem_size, type, arena);
+  if (!data) return false;
+  memcpy(PTR_AT(data, i * elem_size, char), value, elem_size);
+  return true;
+}
+
+UPB_INLINE bool _upb_has_field(const void *msg, size_t idx) {
+  return (*PTR_AT(msg, idx / 8, const char) & (idx % 8)) != 0;
+}
+
+UPB_INLINE bool _upb_sethas(const void *msg, size_t idx) {
+  return (*PTR_AT(msg, idx / 8, char)) |= (1 << (idx % 8));
+}
+
+UPB_INLINE bool _upb_clearhas(const void *msg, size_t idx) {
+  return (*PTR_AT(msg, idx / 8, char)) &= ~(1 << (idx % 8));
+}
+
+UPB_INLINE bool _upb_has_oneof_field(const void *msg, size_t case_ofs, int32_t num) {
+  return *PTR_AT(msg, case_ofs, int32_t) == num;
+}
+
+#undef PTR_AT
+
+#endif  /* UPB_GENERATED_UTIL_H_ */
diff --git a/upb/handlers-inl.h b/upb/handlers-inl.h
index afc1382..4a0494c 100644
--- a/upb/handlers-inl.h
+++ b/upb/handlers-inl.h
@@ -7,6 +7,8 @@
 #define UPB_HANDLERS_INL_H_
 
 #include <limits.h>
+#include "upb/upb.h"
+#include "upb/handlers.h"
 
 /* C inline methods. */
 
diff --git a/upb/handlers.c b/upb/handlers.c
index 0022c32..33c43c3 100644
--- a/upb/handlers.c
+++ b/upb/handlers.c
@@ -4,7 +4,6 @@
 */
 
 #include "upb/handlers.h"
-#include "upb/structdefs.int.h"
 
 #include <string.h>
 
diff --git a/upb/msg.c b/upb/msg.c
index 29ba2e1..c6f0c17 100644
--- a/upb/msg.c
+++ b/upb/msg.c
@@ -51,7 +51,7 @@ static size_t upb_msgval_sizeof(upb_fieldtype_t type) {
       return sizeof(void*);
     case UPB_TYPE_BYTES:
     case UPB_TYPE_STRING:
-      return sizeof(upb_stringview);
+      return sizeof(upb_strview);
   }
   UPB_UNREACHABLE();
 }
diff --git a/upb/msg.h b/upb/msg.h
index c72e9f0..058f4a9 100644
--- a/upb/msg.h
+++ b/upb/msg.h
@@ -36,10 +36,12 @@ class MessageLayout;
 
 #endif
 
-UPB_DECLARE_TYPE(upb::Array, upb_array)
 UPB_DECLARE_TYPE(upb::Map, upb_map)
 UPB_DECLARE_TYPE(upb::MapIterator, upb_mapiter)
 
+struct upb_array;
+typedef struct upb_array upb_array;
+
 /* TODO(haberman): C++ accessors */
 
 UPB_BEGIN_EXTERN_C
@@ -73,21 +75,21 @@ typedef struct upb_msglayout {
 } upb_msglayout;
 
 
-/** upb_stringview ************************************************************/
+/** upb_strview ************************************************************/
 
 typedef struct {
   const char *data;
   size_t size;
-} upb_stringview;
+} upb_strview;
 
-UPB_INLINE upb_stringview upb_stringview_make(const char *data, size_t size) {
-  upb_stringview ret;
+UPB_INLINE upb_strview upb_strview_make(const char *data, size_t size) {
+  upb_strview ret;
   ret.data = data;
   ret.size = size;
   return ret;
 }
 
-#define UPB_STRINGVIEW_INIT(ptr, len) {ptr, len}
+#define UPB_STRVIEW_INIT(ptr, len) {ptr, len}
 
 
 /** upb_msgval ****************************************************************/
@@ -107,7 +109,7 @@ typedef union {
   const upb_msg* msg;
   const upb_array* arr;
   const void* ptr;
-  upb_stringview str;
+  upb_strview str;
 } upb_msgval;
 
 #define ACCESSORS(name, membername, ctype) \
@@ -134,12 +136,12 @@ ACCESSORS(map,    map, const upb_map*)
 ACCESSORS(msg,    msg, const upb_msg*)
 ACCESSORS(ptr,    ptr, const void*)
 ACCESSORS(arr,    arr, const upb_array*)
-ACCESSORS(str,    str, upb_stringview)
+ACCESSORS(str,    str, upb_strview)
 
 #undef ACCESSORS
 
 UPB_INLINE upb_msgval upb_msgval_makestr(const char *data, size_t size) {
-  return upb_msgval_str(upb_stringview_make(data, size));
+  return upb_msgval_str(upb_strview_make(data, size));
 }
 
 
diff --git a/upb/msgfactory.c b/upb/msgfactory.c
index 593c9dc..05f5975 100644
--- a/upb/msgfactory.c
+++ b/upb/msgfactory.c
@@ -32,7 +32,7 @@ static size_t upb_msgval_sizeof2(upb_fieldtype_t type) {
       return sizeof(void*);
     case UPB_TYPE_BYTES:
     case UPB_TYPE_STRING:
-      return sizeof(upb_stringview);
+      return sizeof(upb_strview);
   }
   UPB_UNREACHABLE();
 }
diff --git a/upb/msgfactory.h b/upb/msgfactory.h
index 73a26ba..8b12461 100644
--- a/upb/msgfactory.h
+++ b/upb/msgfactory.h
@@ -5,6 +5,12 @@
 #ifndef UPB_MSGFACTORY_H_
 #define UPB_MSGFACTORY_H_
 
+#ifdef __cplusplus
+namespace upb {
+class MessageFactory;
+}
+#endif
+
 UPB_DECLARE_TYPE(upb::MessageFactory, upb_msgfactory)
 
 /** upb_msgfactory ************************************************************/
diff --git a/upb/pb/decoder.int.h b/upb/pb/decoder.int.h
index 4032570..c9ad551 100644
--- a/upb/pb/decoder.int.h
+++ b/upb/pb/decoder.int.h
@@ -9,17 +9,10 @@
 #include "upb/handlers.h"
 #include "upb/pb/decoder.h"
 #include "upb/sink.h"
-#include "upb/structdefs.int.h"
 #include "upb/table.int.h"
 
-/* C++ names are not actually used since this type isn't exposed to users. */
-#ifdef __cplusplus
-namespace upb {
-namespace pb {
-class MessageGroup;
-}  /* namespace pb */
-}  /* namespace upb */
-#endif
+#ifndef __cplusplus
+
 UPB_DECLARE_DERIVED_TYPE(upb::pb::MessageGroup, upb::RefCounted,
                          mgroup, upb_refcounted)
 
@@ -82,7 +75,7 @@ typedef enum {
 
 #define OP_MAX OP_HALT
 
-UPB_INLINE opcode getop(uint32_t instr) { return instr & 0xff; }
+UPB_INLINE opcode getop(uint32_t instr) { return (opcode)(instr & 0xff); }
 
 /* Method group; represents a set of decoder methods that had their code
  * emitted together, and must therefore be freed together.  Immutable once
@@ -329,4 +322,6 @@ UPB_INLINE void upb_pbdecoder_unpackdispatch(uint64_t dispatch, uint64_t *ofs,
 
 #define CHECK_RETURN(x) { int32_t ret = x; if (ret >= 0) return ret; }
 
+#endif  /* __cplusplus */
+
 #endif  /* UPB_DECODER_INT_H_ */
diff --git a/upb/structdefs.int.h b/upb/structdefs.int.h
deleted file mode 100644
index cf8bd1d..0000000
--- a/upb/structdefs.int.h
+++ /dev/null
@@ -1,196 +0,0 @@
-/*
-** This file contains definitions of structs that should be considered private
-** and NOT stable across versions of upb.
-**
-** The only reason they are declared here and not in .c files is to allow upb
-** and the application (if desired) to embed statically-initialized instances
-** of structures like defs.
-**
-** If you include this file, all guarantees of ABI compatibility go out the
-** window!  Any code that includes this file needs to recompile against the
-** exact same version of upb that they are linking against.
-**
-** You also need to recompile if you change the value of the UPB_DEBUG_REFS
-** flag.
-*/
-
-#include "upb/def.h"
-
-#ifndef UPB_STATICINIT_H_
-#define UPB_STATICINIT_H_
-
-#ifdef __cplusplus
-/* Because of how we do our typedefs, this header can't be included from C++. */
-#error This file cannot be included from C++
-#endif
-
-/* upb_refcounted *************************************************************/
-
-
-/* upb_def ********************************************************************/
-
-struct upb_def {
-  upb_refcounted base;
-
-  const char *fullname;
-  const upb_filedef* file;
-  char type;  /* A upb_deftype_t (char to save space) */
-
-  /* Used as a flag during the def's mutable stage.  Must be false unless
-   * it is currently being used by a function on the stack.  This allows
-   * us to easily determine which defs were passed into the function's
-   * current invocation. */
-  bool came_from_user;
-};
-
-#define UPB_DEF_INIT(name, type, vtbl, refs, ref2s) \
-    { UPB_REFCOUNT_INIT(vtbl, refs, ref2s), name, NULL, type, false }
-
-
-/* upb_fielddef ***************************************************************/
-
-struct upb_fielddef {
-  upb_def base;
-
-  union {
-    int64_t sint;
-    uint64_t uint;
-    double dbl;
-    float flt;
-    void *bytes;
-  } defaultval;
-  union {
-    const upb_msgdef *def;  /* If !msg_is_symbolic. */
-    char *name;             /* If msg_is_symbolic. */
-  } msg;
-  union {
-    const upb_def *def;  /* If !subdef_is_symbolic. */
-    char *name;          /* If subdef_is_symbolic. */
-  } sub;  /* The msgdef or enumdef for this field, if upb_hassubdef(f). */
-  bool subdef_is_symbolic;
-  bool msg_is_symbolic;
-  const upb_oneofdef *oneof;
-  bool default_is_string;
-  bool type_is_set_;     /* False until type is explicitly set. */
-  bool is_extension_;
-  bool lazy_;
-  bool packed_;
-  upb_intfmt_t intfmt;
-  bool tagdelim;
-  upb_fieldtype_t type_;
-  upb_label_t label_;
-  uint32_t number_;
-  uint32_t selector_base;  /* Used to index into a upb::Handlers table. */
-  uint32_t index_;
-};
-
-extern const struct upb_refcounted_vtbl upb_fielddef_vtbl;
-
-#define UPB_FIELDDEF_INIT(label, type, intfmt, tagdelim, is_extension, lazy,   \
-                          packed, name, num, msgdef, subdef, selector_base,    \
-                          index, defaultval, refs, ref2s)                      \
-  {                                                                            \
-    UPB_DEF_INIT(name, UPB_DEF_FIELD, &upb_fielddef_vtbl, refs, ref2s),        \
-        defaultval, {msgdef}, {subdef}, NULL, false, false,                    \
-        type == UPB_TYPE_STRING || type == UPB_TYPE_BYTES, true, is_extension, \
-        lazy, packed, intfmt, tagdelim, type, label, num, selector_base, index \
-  }
-
-
-/* upb_msgdef *****************************************************************/
-
-struct upb_msgdef {
-  upb_def base;
-
-  size_t selector_count;
-  uint32_t submsg_field_count;
-
-  /* Tables for looking up fields by number and name. */
-  upb_inttable itof;  /* int to field */
-  upb_strtable ntof;  /* name to field/oneof */
-
-  /* Is this a map-entry message? */
-  bool map_entry;
-
-  /* Whether this message has proto2 or proto3 semantics. */
-  upb_syntax_t syntax;
-
-  /* Type of well known type message. UPB_WELLKNOWN_UNSPECIFIED for
-   * non-well-known message. */
-  upb_wellknowntype_t well_known_type;
-
-  /* TODO(haberman): proper extension ranges (there can be multiple). */
-};
-
-extern const struct upb_refcounted_vtbl upb_msgdef_vtbl;
-
-/* TODO: also support static initialization of the oneofs table. This will be
- * needed if we compile in descriptors that contain oneofs. */
-#define UPB_MSGDEF_INIT(name, selector_count, submsg_field_count, itof, ntof, \
-                        map_entry, syntax, well_known_type, refs, ref2s)      \
-  {                                                                           \
-    UPB_DEF_INIT(name, UPB_DEF_MSG, &upb_fielddef_vtbl, refs, ref2s),         \
-        selector_count, submsg_field_count, itof, ntof, map_entry, syntax,    \
-        well_known_type                                                       \
-  }
-
-
-/* upb_enumdef ****************************************************************/
-
-struct upb_enumdef {
-  upb_def base;
-
-  upb_strtable ntoi;
-  upb_inttable iton;
-  int32_t defaultval;
-};
-
-extern const struct upb_refcounted_vtbl upb_enumdef_vtbl;
-
-#define UPB_ENUMDEF_INIT(name, ntoi, iton, defaultval, refs, ref2s) \
-  { UPB_DEF_INIT(name, UPB_DEF_ENUM, &upb_enumdef_vtbl, refs, ref2s), ntoi,    \
-    iton, defaultval }
-
-
-/* upb_oneofdef ***************************************************************/
-
-struct upb_oneofdef {
-  upb_refcounted base;
-
-  uint32_t index;  /* Index within oneofs. */
-  const char *name;
-  upb_strtable ntof;
-  upb_inttable itof;
-  const upb_msgdef *parent;
-};
-
-extern const struct upb_refcounted_vtbl upb_oneofdef_vtbl;
-
-#define UPB_ONEOFDEF_INIT(name, ntof, itof, refs, ref2s) \
-  { UPB_REFCOUNT_INIT(&upb_oneofdef_vtbl, refs, ref2s), 0, name, ntof, itof }
-
-
-/* upb_symtab *****************************************************************/
-
-struct upb_symtab {
-  upb_refcounted base;
-
-  upb_strtable symtab;
-};
-
-struct upb_filedef {
-  upb_refcounted base;
-
-  const char *name;
-  const char *package;
-  const char *phpprefix;
-  const char *phpnamespace;
-  upb_syntax_t syntax;
-
-  upb_inttable defs;
-  upb_inttable deps;
-};
-
-extern const struct upb_refcounted_vtbl upb_filedef_vtbl;
-
-#endif  /* UPB_STATICINIT_H_ */
diff --git a/upb/structs.int.h b/upb/structs.int.h
index 6bc502e..1394dd4 100644
--- a/upb/structs.int.h
+++ b/upb/structs.int.h
@@ -5,6 +5,9 @@
 #ifndef UPB_STRUCTS_H_
 #define UPB_STRUCTS_H_
 
+#include "upb/def.h"
+#include "upb/msg.h"
+
 struct upb_array {
   upb_fieldtype_t type;
   uint8_t element_size;
diff --git a/upbc/generator.cc b/upbc/generator.cc
index 0f7d14d..42e249e 100644
--- a/upbc/generator.cc
+++ b/upbc/generator.cc
@@ -177,19 +177,23 @@ std::string GetSizeInit(const MessageLayout::Size& size) {
   return absl::Substitute("UPB_SIZE($0, $1)", size.size32, size.size64);
 }
 
+std::string MessageName(const protobuf::Descriptor* descriptor) {
+  return ToCIdent(descriptor->full_name());
+}
+
+std::string MessageInit(const protobuf::Descriptor* descriptor) {
+  return MessageName(descriptor) + "_msginit";
+}
+
 std::string CTypeInternal(const protobuf::FieldDescriptor* field,
                           bool is_const) {
   std::string maybe_const = is_const ? "const " : "";
-  if (field->label() == protobuf::FieldDescriptor::LABEL_REPEATED) {
-    return maybe_const + "upb_array*";
-  }
-
   switch (field->cpp_type()) {
     case protobuf::FieldDescriptor::CPPTYPE_MESSAGE: {
       std::string maybe_struct =
           field->file() != field->message_type()->file() ? "struct " : "";
-      return maybe_const + maybe_struct +
-             ToCIdent(field->message_type()->full_name()) + "*";
+      return maybe_const + maybe_struct + MessageName(field->message_type()) +
+             "*";
     }
     case protobuf::FieldDescriptor::CPPTYPE_ENUM:
       return ToCIdent(field->enum_type()->full_name());
@@ -208,7 +212,35 @@ std::string CTypeInternal(const protobuf::FieldDescriptor* field,
     case protobuf::FieldDescriptor::CPPTYPE_UINT64:
       return "uint64_t";
     case protobuf::FieldDescriptor::CPPTYPE_STRING:
-      return "upb_stringview";
+      return "upb_strview";
+    default:
+      fprintf(stderr, "Unexpected type");
+      abort();
+  }
+}
+
+std::string UpbType(const protobuf::FieldDescriptor* field) {
+  switch (field->cpp_type()) {
+    case protobuf::FieldDescriptor::CPPTYPE_MESSAGE:
+      return "UPB_TYPE_MESSAGE";
+    case protobuf::FieldDescriptor::CPPTYPE_ENUM:
+      return "UPB_TYPE_ENUM";
+    case protobuf::FieldDescriptor::CPPTYPE_BOOL:
+      return "UPB_TYPE_BOOL";
+    case protobuf::FieldDescriptor::CPPTYPE_FLOAT:
+      return "UPB_TYPE_FLOAT";
+    case protobuf::FieldDescriptor::CPPTYPE_INT32:
+      return "UPB_TYPE_INT32";
+    case protobuf::FieldDescriptor::CPPTYPE_UINT32:
+      return "UPB_TYPE_UINT32";
+    case protobuf::FieldDescriptor::CPPTYPE_DOUBLE:
+      return "UPB_TYPE_DOUBLE";
+    case protobuf::FieldDescriptor::CPPTYPE_INT64:
+      return "UPB_TYPE_INT64";
+    case protobuf::FieldDescriptor::CPPTYPE_UINT64:
+      return "UPB_TYPE_UINT64";
+    case protobuf::FieldDescriptor::CPPTYPE_STRING:
+      return "UPB_TYPE_STRING";
     default:
       fprintf(stderr, "Unexpected type");
       abort();
@@ -220,7 +252,7 @@ std::string FieldDefault(const protobuf::FieldDescriptor* field) {
     case protobuf::FieldDescriptor::CPPTYPE_MESSAGE:
       return "NULL";
     case protobuf::FieldDescriptor::CPPTYPE_STRING:
-      return absl::Substitute("upb_stringview_make(\"$0\", strlen(\"$0\"))",
+      return absl::Substitute("upb_strview_make(\"$0\", strlen(\"$0\"))",
                               absl::CEscape(field->default_value_string()));
     case protobuf::FieldDescriptor::CPPTYPE_INT32:
       return absl::StrCat(field->default_value_int32());
@@ -290,20 +322,19 @@ void GenerateMessageInHeader(const protobuf::Descriptor* message, Output& output
   output("/* $0 */\n\n", message->full_name());
   std::string msgname = ToCIdent(message->full_name());
   output(
-      "extern const upb_msglayout $0_msginit;\n"
       "UPB_INLINE $0 *$0_new(upb_arena *arena) {\n"
-      "  return ($0 *)upb_msg_new(&$0_msginit, arena);\n"
+      "  return ($0 *)upb_msg_new(&$1, arena);\n"
       "}\n"
-      "UPB_INLINE $0 *$0_parsenew(upb_stringview buf, upb_arena *arena) {\n"
+      "UPB_INLINE $0 *$0_parsenew(upb_strview buf, upb_arena *arena) {\n"
       "  $0 *ret = $0_new(arena);\n"
-      "  return (ret && upb_decode(buf, ret, &$0_msginit)) ? ret : NULL;\n"
+      "  return (ret && upb_decode(buf, ret, &$1)) ? ret : NULL;\n"
       "}\n"
       "UPB_INLINE char *$0_serialize(const $0 *msg, upb_arena *arena, size_t "
       "*len) {\n"
-      "  return upb_encode(msg, &$0_msginit, arena, len);\n"
+      "  return upb_encode(msg, &$1, arena, len);\n"
       "}\n"
       "\n",
-      msgname);
+      MessageName(message), MessageInit(message));
 
   for (int i = 0; i < message->oneof_decl_count(); i++) {
     const protobuf::OneofDescriptor* oneof = message->oneof_decl(i);
@@ -326,32 +357,122 @@ void GenerateMessageInHeader(const protobuf::Descriptor* message, Output& output
   }
 
   for (auto field : FieldNumberOrder(message)) {
-    output("UPB_INLINE $0 $1_$2(const $1 *msg) {", CTypeConst(field), msgname,
-           field->name());
-    if (field->containing_oneof()) {
-      output(" return UPB_READ_ONEOF(msg, $0, $1, $2, $3, $4); }\n",
-             CTypeConst(field), GetSizeInit(layout.GetFieldOffset(field)),
-             GetSizeInit(layout.GetOneofCaseOffset(field->containing_oneof())),
-             field->number(), FieldDefault(field));
+
+    if (layout.HasHasbit(field)) {
+      output(
+          "UPB_INLINE bool $0_has_$1(const $0 *msg) { "
+          "return _upb_has_field(msg, $2); }\n",
+          msgname, field->name(), layout.GetHasbitIndex(field));
+    } else if (field->containing_oneof()) {
+      output(
+          "UPB_INLINE bool $0_has_$1(const $0 *msg) { "
+          "return _upb_has_oneof_field(msg, $2, $3); }\n",
+          msgname, field->name(),
+          GetSizeInit(layout.GetOneofCaseOffset(field->containing_oneof())),
+          field->number());
+    }
+
+    if (field->is_repeated()) {
+      output(
+          "UPB_INLINE $0 const* $1_$2(const $1 *msg, size_t *len) { "
+          "return ($0 const*)_upb_array_accessor(msg, $3, len); }\n",
+          CTypeConst(field), msgname, field->name(),
+          GetSizeInit(layout.GetFieldOffset(field)));
+    } else if (field->containing_oneof()) {
+      output(
+          "UPB_INLINE $0 $1_$2(const $1 *msg) { "
+          "return UPB_READ_ONEOF(msg, $0, $3, $4, $5, $6); }\n",
+          CTypeConst(field), msgname, field->name(),
+          GetSizeInit(layout.GetFieldOffset(field)),
+          GetSizeInit(layout.GetOneofCaseOffset(field->containing_oneof())),
+          field->number(), FieldDefault(field));
     } else {
-      output(" return UPB_FIELD_AT(msg, $0, $1); }\n", CTypeConst(field),
-             GetSizeInit(layout.GetFieldOffset(field)));
+      output(
+          "UPB_INLINE $0 $1_$2(const $1 *msg) { "
+          "return UPB_FIELD_AT(msg, $0, $3); }\n",
+          CTypeConst(field), msgname, field->name(),
+          GetSizeInit(layout.GetFieldOffset(field)));
     }
   }
 
   output("\n");
 
   for (auto field : FieldNumberOrder(message)) {
-    output("UPB_INLINE void $0_set_$1($0 *msg, $2 value) { ", msgname,
-           field->name(), CType(field));
-    if (field->containing_oneof()) {
-      output("UPB_WRITE_ONEOF(msg, $0, $1, value, $2, $3); }\n", CType(field),
-             GetSizeInit(layout.GetFieldOffset(field)),
-             GetSizeInit(layout.GetOneofCaseOffset(field->containing_oneof())),
-             field->number());
+    if (field->is_repeated()) {
+      output(
+          "UPB_INLINE $0* $1_mutable_$2($1 *msg, size_t *len) {\n"
+          "  return ($0*)_upb_array_mutable_accessor(msg, $3, len);\n"
+          "}\n",
+          CType(field), msgname, field->name(),
+          GetSizeInit(layout.GetFieldOffset(field)));
+      output(
+          "UPB_INLINE $0* $1_resize_$2($1 *msg, size_t len, "
+          "upb_arena *arena) {\n"
+          "  return ($0*)_upb_array_resize_accessor(msg, $3, len, $4, $5, "
+          "arena);\n"
+          "}\n",
+          CType(field), msgname, field->name(),
+          GetSizeInit(layout.GetFieldOffset(field)),
+          GetSizeInit(MessageLayout::SizeOfUnwrapped(field).size),
+          UpbType(field));
+      if (field->cpp_type() == protobuf::FieldDescriptor::CPPTYPE_MESSAGE) {
+        output(
+            "UPB_INLINE struct $0* $1_add_$2($1 *msg, upb_arena *arena) {\n"
+            "  struct $0* sub = (struct $0*)upb_msg_new(&$3, arena);\n"
+            "  bool ok = _upb_array_append_accessor(\n"
+            "      msg, $4, $5, $6, &sub, arena);\n"
+            "  if (!ok) return NULL;\n"
+            "  return sub;\n"
+            "}\n",
+            MessageName(field->message_type()), msgname, field->name(),
+            MessageInit(field->message_type()),
+            GetSizeInit(layout.GetFieldOffset(field)),
+            GetSizeInit(MessageLayout::SizeOfUnwrapped(field).size),
+            UpbType(field));
+      } else {
+        output(
+            "UPB_INLINE bool $1_add_$2($1 *msg, $0 val, upb_arena *arena) {\n"
+            "  return _upb_array_append_accessor(\n"
+            "      msg, $3, $4, $5, &val, arena);\n"
+            "}\n",
+            CType(field), msgname, field->name(),
+            GetSizeInit(layout.GetFieldOffset(field)),
+            GetSizeInit(MessageLayout::SizeOfUnwrapped(field).size),
+            UpbType(field));
+      }
     } else {
-      output("UPB_FIELD_AT(msg, $0, $1) = value; }\n", CType(field),
-             GetSizeInit(layout.GetFieldOffset(field)));
+      output("UPB_INLINE void $0_set_$1($0 *msg, $2 value) {\n", msgname,
+             field->name(), CType(field));
+      if (field->containing_oneof()) {
+        output(
+            "  UPB_WRITE_ONEOF(msg, $0, $1, value, $2, $3);\n"
+            "}\n",
+            CType(field), GetSizeInit(layout.GetFieldOffset(field)),
+            GetSizeInit(layout.GetOneofCaseOffset(field->containing_oneof())),
+            field->number());
+      } else {
+        if (MessageLayout::HasHasbit(field)) {
+          output("  _upb_sethas(msg, $0);\n", layout.GetHasbitIndex(field));
+        }
+        output(
+            "  UPB_FIELD_AT(msg, $0, $1) = value;\n"
+            "}\n",
+            CType(field), GetSizeInit(layout.GetFieldOffset(field)));
+      }
+      if (field->cpp_type() == protobuf::FieldDescriptor::CPPTYPE_MESSAGE) {
+        output(
+            "UPB_INLINE struct $0* $1_mutable_$2($1 *msg, upb_arena *arena) {\n"
+            "  struct $0* sub = (struct $0*)$1_$2(msg);\n"
+            "  if (sub == NULL) {\n"
+            "    sub = (struct $0*)upb_msg_new(&$3, arena);\n"
+            "    if (!sub) return NULL;\n"
+            "    $1_set_$2(msg, sub);\n"
+            "  }\n"
+            "  return sub;\n"
+            "}\n",
+            MessageName(field->message_type()), msgname, field->name(),
+            MessageInit(field->message_type()));
+      }
     }
   }
 
@@ -363,6 +484,7 @@ void WriteHeader(const protobuf::FileDescriptor* file, Output& output) {
   output(
       "#ifndef $0_UPB_H_\n"
       "#define $0_UPB_H_\n\n"
+      "#include \"upb/generated_util.h\"\n\n"
       "#include \"upb/msg.h\"\n\n"
       "#include \"upb/decode.h\"\n"
       "#include \"upb/encode.h\"\n"
@@ -376,21 +498,27 @@ void WriteHeader(const protobuf::FileDescriptor* file, Output& output) {
   }
   for (auto message : SortedMessages(file)) {
     output("typedef struct $0 $0;\n", ToCIdent(message->full_name()));
-  };
+  }
+  for (auto message : SortedMessages(file)) {
+    output("extern const upb_msglayout $0;\n", MessageInit(message));
+  }
 
   // Forward-declare types not in this file, but used as submessages.
-  std::set<std::string> forward_names;
+  std::set<const protobuf::Descriptor*> forward_messages;
   for (auto message : SortedMessages(file)) {
     for (int i = 0; i < message->field_count(); i++) {
       const protobuf::FieldDescriptor* field = message->field(i);
       if (field->cpp_type() == protobuf::FieldDescriptor::CPPTYPE_MESSAGE &&
-          field->file() != message->file()) {
-        forward_names.insert(ToCIdent(field->message_type()->full_name()));
+          field->file() != field->message_type()->file()) {
+        forward_messages.insert(field->message_type());
       }
     }
   }
-  for (const auto& name : forward_names) {
-    output("struct $0;\n", name);
+  for (const auto& descriptor : forward_messages) {
+    output("struct $0;\n", MessageName(descriptor));
+  }
+  for (const auto& descriptor : forward_messages) {
+    output("extern const upb_msglayout $0;\n", MessageInit(descriptor));
   }
 
   output(
@@ -458,8 +586,7 @@ void WriteSource(const protobuf::FileDescriptor* file, Output& output) {
             submsg_indexes.end()) {
           continue;
         }
-        output("  &$0_msginit,\n",
-               ToCIdent(submsg->message_type()->full_name()));
+        output("  &$0,\n", MessageInit(submsg->message_type()));
         submsg_indexes[submsg->message_type()] = i++;
       }
 
@@ -504,7 +631,7 @@ void WriteSource(const protobuf::FileDescriptor* file, Output& output) {
       output("};\n\n");
     }
 
-    output("const upb_msglayout $0_msginit = {\n", msgname);
+    output("const upb_msglayout $0 = {\n", MessageInit(message));
     output("  $0,\n", submsgs_array_ref);
     output("  $0,\n", fields_array_ref);
     output("  $0, $1, $2,\n", GetSizeInit(layout.message_size()),
diff --git a/upbc/message_layout.cc b/upbc/message_layout.cc
index b6614f0..5956424 100644
--- a/upbc/message_layout.cc
+++ b/upbc/message_layout.cc
@@ -30,16 +30,20 @@ bool MessageLayout::HasHasbit(const protobuf::FieldDescriptor* field) {
 
 MessageLayout::SizeAndAlign MessageLayout::SizeOf(
     const protobuf::FieldDescriptor* field) {
-  if (field->label() == protobuf::FieldDescriptor::LABEL_REPEATED ||
-      field->cpp_type() == protobuf::FieldDescriptor::CPPTYPE_MESSAGE) {
-    return {{4, 8}, {4, 8}};
+  if (field->is_repeated()) {
+    return {{4, 8}, {4, 8}};  // Pointer to array object.
+  } else {
+    return SizeOfUnwrapped(field);
   }
+}
 
+MessageLayout::SizeAndAlign MessageLayout::SizeOfUnwrapped(
+    const protobuf::FieldDescriptor* field) {
   switch (field->cpp_type()) {
+    case protobuf::FieldDescriptor::CPPTYPE_MESSAGE:
+      return {{4, 8}, {4, 8}};  // Pointer to message.
     case protobuf::FieldDescriptor::CPPTYPE_STRING:
-      // upb_stringview
-      // return {{8, 16}, {4, 8}};
-      return {{8, 16}, {8, 16}};
+      return {{8, 16}, {4, 8}};  // upb_stringview
     case protobuf::FieldDescriptor::CPPTYPE_BOOL:
       return {{1, 1}, {1, 1}};
     case protobuf::FieldDescriptor::CPPTYPE_FLOAT:
diff --git a/upbc/message_layout.h b/upbc/message_layout.h
index bdcc336..a4cb289 100644
--- a/upbc/message_layout.h
+++ b/upbc/message_layout.h
@@ -60,6 +60,8 @@ class MessageLayout {
   Size message_size() const { return size_; }
 
   static bool HasHasbit(const google::protobuf::FieldDescriptor* field);
+  static SizeAndAlign SizeOfUnwrapped(
+      const google::protobuf::FieldDescriptor* field);
 
  private:
   void ComputeLayout(const google::protobuf::Descriptor* descriptor);
@@ -87,7 +89,8 @@ class MessageLayout {
   }
 
   static SizeAndAlign SizeOf(const google::protobuf::FieldDescriptor* field);
-  static int64_t FieldLayoutRank(const google::protobuf::FieldDescriptor* field);
+  static int64_t FieldLayoutRank(
+      const google::protobuf::FieldDescriptor* field);
 
   std::unordered_map<const google::protobuf::FieldDescriptor*, Size>
       field_offsets_;