1 files changed, 20 insertions, 1 deletions
diff --git a/src/expr/mkexpr b/src/expr/mkexpr
index ca89dfc91..8c94db3cc 100755
--- a/src/expr/mkexpr
+++ b/src/expr/mkexpr
@@ -70,10 +70,15 @@ seen_theory=false
 seen_theory_builtin=false
 
 function theory {
-  # theory T header
+  # theory ID T header
 
   lineno=${BASH_LINENO[0]}
 
+  if $seen_theory; then
+    echo "$kf:$lineno: error: multiple theories defined in one file !?" >&2
+    exit 1
+  fi
+
   # this script doesn't care about the theory class information, but
   # makes does make sure it's there
   seen_theory=true
@@ -93,6 +98,20 @@ function theory {
   fi
 }
 
+function alternate {
+  # alternate ID name T header
+
+  lineno=${BASH_LINENO[0]}
+
+  if $seen_theory; then
+    echo "$kf:$lineno: error: multiple theories defined in one file !?" >&2
+    exit 1
+  fi
+
+  seen_theory=true
+  seen_endtheory=true
+}
+
 function rewriter {
   # rewriter class header
   lineno=${BASH_LINENO[0]}