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Use compiler provided static assert and avoid tripping unused-local-typedef warnings.

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Thomas Van Lenten 2015-12-08 17:13:38 -05:00
parent 9bd74b7f25
commit 52b8d3fe78
1 changed files with 9 additions and 4 deletions
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13
objectivec/GPBMessage.m
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@ -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
//