InitListChecker::CheckListElementTypes(): Check for function types and issue an appropriate diagnostic.

llvm-svn: 54614

clang/include/clang/Basic/DiagnosticKinds.def

@@ -810,6 +810,8 @@ DIAG(err_empty_scalar_initializer, ERROR,
      "scalar initializer cannot be empty")
 DIAG(err_illegal_initializer, ERROR,
      "illegal initializer (only variables can be initialized)")
+DIAG(err_illegal_initializer_type, ERROR,
+     "illegal initializer type ('%0')")
 DIAG(err_implicit_empty_initializer, ERROR,
      "initializer for aggregate with no elements requires explicit braces")
 

clang/lib/Sema/SemaInit.cpp

@@ -139,10 +139,11 @@ void InitListChecker::CheckListElementTypes(InitListExpr *IList,
       CheckArrayType(IList, DeclType, Index);
     else
       assert(0 && "Aggregate that isn't a function or array?!");
-  } else if (DeclType->isVoidType()) {
-    // This is clearly invalid, so not much we can do here. Don't bother
-    // with a diagnostic; we'll give an error elsewhere.
+  } else if (DeclType->isVoidType() || DeclType->isFunctionType()) {
+    // This type is invalid, issue a diagnostic.
     Index++;
+    SemaRef->Diag(IList->getLocStart(), diag::err_illegal_initializer_type,
+                  DeclType.getAsString());
     hadError = true;
   } else {
     // In C, all types are either scalars or aggregates, but

clang/test/Sema/compound-literal.c

@@ -29,4 +29,5 @@ struct Incomplete* I1 = &(struct Incomplete){1, 2, 3}; // -expected-error {{vari
 void IncompleteFunc(unsigned x) {
   struct Incomplete* I2 = (struct foo[x]){1, 2, 3}; // -expected-error {{variable-sized object may not be initialized}}
   (void){1,2,3}; // -expected-error {{variable has incomplete type}}
+  (void(void)) { 0 }; // -expected-error{{illegal initializer type ('void (void)')}}
 }