compilerspecifics.h

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/*
ATTENTION:
This header is part of the PCH
Remove the include in all StdAfx.h files or live with the consequences :)
*/

#ifndef CLIB_COMPILERSPECIFICS_H_
#define CLIB_COMPILERSPECIFICS_H_

// Fix for VS CodeAnalysis
#ifdef _MSC_VER
#pragma warning( disable : 4467 )  // ATL attributes
#include <CodeAnalysis/sourceannotations.h>
#define passert_assume( x ) __analysis_assume( x )
#else
#define passert_assume( x )
#endif


// Defines noreturn attribute using VC++ specifics, C++11-way for modern compilers. :P
// Note: noreturn can be used for code-generation and is supposed to produce more optimized code
#ifndef POL_NORETURN
#if defined( _MSC_VER )
#define POL_NORETURN _declspec( noreturn )
#elif defined( __clang__ )
#define POL_NORETURN [[noreturn]]
#elif defined( __GNUC__ )
#define POL__GCC_VERSION ( __GNUC__ * 100 + __GNUC_MINOR__ )
#if POL__GCC_VERSION <= 407
#define POL_NORETURN __attribute__( ( noreturn ) )
#else
#define POL_NORETURN [[noreturn]]
#endif
#undef POL__GCC_VERSION
#else
#define POL_NORETURN [[noreturn]]
#endif
#endif

// Note: POL_ANALYZER_NORETURN is just a hint for code analyzers (mostly clang-analyzer) and is not
//   used for code generation. I don't know of anything similar in the other analyzers and
// thought
//       of using POL_NORETURN here. Right now I'm not sure if this is needed at all.
#ifndef POL_ANALYZER_NORETURN
#ifndef __has_feature
#define __has_feature( x ) 0
#endif
#if __has_feature( attribute_analyzer_noreturn )
#define POL_ANALYZER_NORETURN __attribute__( ( analyzer_noreturn ) )
#else
#define POL_ANALYZER_NORETURN
#endif
#endif

// override and final makros
#ifndef POL_OVERRIDE
#if defined( _MSC_VER )
#define POL_OVERRIDE override
#define POL_FINAL final
#elif defined( __clang__ )
#define POL_OVERRIDE override
#define POL_FINAL final
#elif defined( __GNUC__ )
#define POL__GCC_VERSION ( __GNUC__ * 100 + __GNUC_MINOR__ )
#if POL__GCC_VERSION < 407
#define POL_OVERRIDE
#define POL_FINAL
#else
#define POL_OVERRIDE override
#define POL_FINAL final
#endif
#undef POL__GCC_VERSION
#else
#define POL_OVERRIDE
#define POL_FINAL
#endif
#endif


// the following code to handle NOEXCEPT was obtained
// from http://stackoverflow.com/questions/18387640/how-to-deal-with-noexcept-in-visual-studio
#if !defined( HAS_NOEXCEPT )
#if defined( __clang__ )
#if __has_feature( cxx_noexcept )
#define HAS_NOEXCEPT
#endif
#else
#if defined( __GXX_EXPERIMENTAL_CXX0X__ ) && __GNUC__ * 10 + __GNUC_MINOR__ >= 46 || \
  defined( _MSC_FULL_VER ) && _MSC_FULL_VER >= 190023026
#define HAS_NOEXCEPT
#endif
#endif

#ifdef HAS_NOEXCEPT
#define POL_NOEXCEPT noexcept
#else
#define POL_NOEXCEPT
#endif
#endif

#if ( !defined( _MSC_VER ) || _MSC_VER >= 1900 )
#define THREADLOCAL thread_local
#else
#define THREADLOCAL __declspec( thread )
#endif

#if ( !defined( _MSC_VER ) || _MSC_VER >= 1900 )
#define CONSTEXPR constexpr
#else
#define CONSTEXPR
#endif
#endif