Resolve compilation errors if compiled with more stringent semantic checks.

Adding Travis test to build with strict warnings.
Fixing a warning in a test which used signed/unsigned integer comparison.

1 files changed, 11 insertions, 6 deletions

diff --git a/upb/json/parser.c b/upb/json/parser.c
index a1e83c5..08cd13d 100644
--- a/upb/json/parser.c
+++ b/upb/json/parser.c
@@ -1135,8 +1135,6 @@ static const char _json_trans_actions[] = {
 };
 
 static const int json_start = 1;
-static const int json_first_final = 56;
-static const int json_error = 0;
 
 static const int json_en_number_machine = 10;
 static const int json_en_string_machine = 19;
@@ -1164,7 +1162,7 @@ size_t parse(void *closure, const void *hd, const char *buf, size_t size,
   capture_resume(parser, buf);
 
   
-#line 1168 "upb/json/parser.c"
+#line 1166 "upb/json/parser.c"
 	{
 	int _klen;
 	unsigned int _trans;
@@ -1350,7 +1348,7 @@ _match:
 #line 1082 "upb/json/parser.rl"
 	{ p--; {cs = stack[--top]; goto _again;} }
 	break;
-#line 1354 "upb/json/parser.c"
+#line 1352 "upb/json/parser.c"
 		}
 	}
 
@@ -1382,6 +1380,13 @@ error:
 bool end(void *closure, const void *hd) {
   UPB_UNUSED(closure);
   UPB_UNUSED(hd);
+
+  // Prevent compile warning on unused static constants.
+  UPB_UNUSED(json_start);
+  UPB_UNUSED(json_en_number_machine);
+  UPB_UNUSED(json_en_string_machine);
+  UPB_UNUSED(json_en_value_machine);
+  UPB_UNUSED(json_en_main);
   return true;
 }
 
@@ -1414,13 +1419,13 @@ void upb_json_parser_reset(upb_json_parser *p) {
   int top;
   // Emit Ragel initialization of the parser.
   
-#line 1418 "upb/json/parser.c"
+#line 1423 "upb/json/parser.c"
 	{
 	cs = json_start;
 	top = 0;
 	}
 
-#line 1157 "upb/json/parser.rl"
+#line 1164 "upb/json/parser.rl"
   p->current_state = cs;
   p->parser_top = top;
   accumulate_clear(p);