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use sizeof(expr) for unevaluated syntax check

This commit is contained in:
Mickey Rose 2017-01-19 15:04:54 +01:00 committed by Martin Hořeňovský
parent cfaf906417
commit 227598af47
2 changed files with 3 additions and 5 deletions
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3
include/internal/catch_capture.hpp
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@ -40,8 +40,7 @@
__catchResult.useActiveException( Catch::ResultDisposition::Normal ); \
} \
INTERNAL_CATCH_REACT( __catchResult ) \
} while( Catch::isTrue( false && static_cast<bool>( !!(expr) ) ) ) // expr here is never evaluated at runtime but it forces the compiler to give it a look
// The double negation silences MSVC's C4800 warning, the static_cast forces short-circuit evaluation if the type has overloaded &&.
} while( Catch::alwaysFalse( sizeof(expr) ) ) // expr here is never evaluated at runtime but it forces the compiler to give it a look
///////////////////////////////////////////////////////////////////////////////
#define INTERNAL_CATCH_IF( expr, resultDisposition, macroName ) \

5
include/internal/catch_common.h
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@ -116,9 +116,8 @@ namespace Catch {
std::ostream& operator << ( std::ostream& os, SourceLineInfo const& info );
// This is just here to avoid compiler warnings with macro constants and boolean literals
inline bool isTrue( bool value ){ return value; }
inline bool alwaysTrue() { return true; }
inline bool alwaysFalse() { return false; }
inline bool alwaysTrue( std::size_t = 0 ) { return true; }
inline bool alwaysFalse( std::size_t = 0 ) { return false; }
void throwLogicError( std::string const& message, SourceLineInfo const& locationInfo );