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-rw-r--r--objectivec/GPBMessage.m13
1 files changed, 9 insertions, 4 deletions
diff --git a/objectivec/GPBMessage.m b/objectivec/GPBMessage.m
index caef584c..d9080c3f 100644
--- a/objectivec/GPBMessage.m
+++ b/objectivec/GPBMessage.m
@@ -55,10 +55,15 @@ NSString *const GPBExceptionMessageKey =
static NSString *const kGPBDataCoderKey = @"GPBData";
#ifndef _GPBCompileAssert
-#define _GPBCompileAssertSymbolInner(line, msg) _GPBCompileAssert ## line ## __ ## msg
-#define _GPBCompileAssertSymbol(line, msg) _GPBCompileAssertSymbolInner(line, msg)
-#define _GPBCompileAssert(test, msg) \
- typedef char _GPBCompileAssertSymbol(__LINE__, msg) [ ((test) ? 1 : -1) ]
+ #if __has_feature(c_static_assert) || __has_extension(c_static_assert)
+ #define _GPBCompileAssert(test, msg) _Static_assert((test), #msg)
+ #else
+ // Pre-Xcode 7 support.
+ #define _GPBCompileAssertSymbolInner(line, msg) _GPBCompileAssert ## line ## __ ## msg
+ #define _GPBCompileAssertSymbol(line, msg) _GPBCompileAssertSymbolInner(line, msg)
+ #define _GPBCompileAssert(test, msg) \
+ typedef char _GPBCompileAssertSymbol(__LINE__, msg) [ ((test) ? 1 : -1) ]
+ #endif // __has_feature(c_static_assert) || __has_extension(c_static_assert)
#endif // _GPBCompileAssert
//