Prohibit returning functions from functions.

(Fix malformed program crasher)
2012-02-06 13:59:02 -08:00
parent f939015b97
commit b7c5af7e64
1 changed files with 4 additions and 0 deletions
--- a/decl.cpp
+++ b/decl.cpp
@@ -447,6 +447,10 @@ Declarator::GetType(const Type *base, DeclSpecs *ds) const {
            Error(pos, "No return type provided in function declaration.");
            return NULL;
        }
+        if (dynamic_cast<const FunctionType *>(returnType) != NULL) {
+            Error(pos, "Illegal to return function type from function.");
+            return NULL;
+        }
        
        bool isExported = ds && (ds->storageClass == SC_EXPORT);
        bool isExternC =  ds && (ds->storageClass == SC_EXTERN_C);