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use assume from c++23 when possible (#8597)

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Sebastien Loriot 2024-11-14 07:42:19 +01:00 committed by GitHub
parent cf31301980 333a0df9d7
commit dd6adf68b3
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1 changed files with 8 additions and 1 deletions
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9
Installation/include/CGAL/config.h
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@ -157,6 +157,10 @@
#if __cplusplus >= 202002L || _MSVC_LANG >= 202002L #if __cplusplus >= 202002L || _MSVC_LANG >= 202002L
# define CGAL_CXX20 1 # define CGAL_CXX20 1
#endif #endif
// Same for C++23
#if __cplusplus >= 202302L || _MSVC_LANG >= 202302L
# define CGAL_CXX23 1
#endif
//----------------------------------------------------------------------// //----------------------------------------------------------------------//
@ -351,8 +355,11 @@ using std::max;
#endif #endif
// Macro CGAL_ASSUME and CGAL_UNREACHABLE // Macro CGAL_ASSUME and CGAL_UNREACHABLE
#ifdef CGAL_CXX23
# define CGAL_ASSUME(EX) [[ assume(EX) ]]
# define CGAL_UNREACHABLE() std::unreachable()
#elif __has_builtin(__builtin_unreachable) || (CGAL_GCC_VERSION > 0 && !__STRICT_ANSI__)
// Call a builtin of the compiler to pass a hint to the compiler // Call a builtin of the compiler to pass a hint to the compiler
#if __has_builtin(__builtin_unreachable) || (CGAL_GCC_VERSION > 0 && !__STRICT_ANSI__)
// From g++ 4.5, there exists a __builtin_unreachable() // From g++ 4.5, there exists a __builtin_unreachable()
// Also in LLVM/clang // Also in LLVM/clang
# define CGAL_ASSUME(EX) if(!(EX)) { __builtin_unreachable(); } # define CGAL_ASSUME(EX) if(!(EX)) { __builtin_unreachable(); }