commit abde2c7f2c0699c7db395166f4e89b80bb87bf67
author Douglas Gregor <dgregor@apple.com> Mon Mar 25 22:22:35 2013 +0000
committer Douglas Gregor <dgregor@apple.com> Mon Mar 25 22:22:35 2013 +0000
tree 99e966599c39dad7115f779981a5efcaa7b9fdf6
parent e91544210a59c53ad8e49d0008a969682579814e

<rdar://problem/13459871> Allow forward declaration of enums with a fixed underlying type in Objective-C (as well as C++11).



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@177930 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Sema/SemaDecl.cpp

diff --git a/lib/Sema/SemaDecl.cpp b/lib/Sema/SemaDecl.cpp
index 5597bf6..cb05bb0 100644
--- a/lib/Sema/SemaDecl.cpp
+++ b/lib/Sema/SemaDecl.cpp
@@ -9858,7 +9858,8 @@
     // If this is an undefined enum, warn.
     if (TUK != TUK_Definition && !Invalid) {
       TagDecl *Def;
-      if (getLangOpts().CPlusPlus11 && cast<EnumDecl>(New)->isFixed()) {
+      if ((getLangOpts().CPlusPlus11 || getLangOpts().ObjC2) &&
+          cast<EnumDecl>(New)->isFixed()) {
         // C++0x: 7.2p2: opaque-enum-declaration.
         // Conflicts are diagnosed above. Do nothing.
       }

test/SemaObjC/enum-fixed-type.m

diff --git a/test/SemaObjC/enum-fixed-type.m b/test/SemaObjC/enum-fixed-type.m
index 6fd400a..c00e45a 100644
--- a/test/SemaObjC/enum-fixed-type.m
+++ b/test/SemaObjC/enum-fixed-type.m
@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 -fsyntax-only -verify %s
+// RUN: %clang_cc1 -fsyntax-only -pedantic -verify %s
 
 #if !__has_feature(objc_fixed_enum)
 #  error Enumerations with a fixed underlying type are not supported
@@ -28,9 +28,9 @@
 
 // <rdar://10381507>
 typedef enum : long { Foo } IntegerEnum;
-int arr[(sizeof(typeof(Foo)) == sizeof(typeof(IntegerEnum))) - 1];
-int arr1[(sizeof(typeof(Foo)) == sizeof(typeof(long))) - 1];
-int arr2[(sizeof(typeof(IntegerEnum)) == sizeof(typeof(long))) - 1];
+int arr[(sizeof(__typeof__(Foo)) == sizeof(__typeof__(IntegerEnum)))? 1 : -1];
+int arr1[(sizeof(__typeof__(Foo)) == sizeof(__typeof__(long)))? 1 : -1];
+int arr2[(sizeof(__typeof__(IntegerEnum)) == sizeof(__typeof__(long)))? 1 : -1];
 
 // <rdar://problem/10760113>
 typedef enum : long long { Bar = -1 } LongLongEnum;