common.hpp

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#pragma once
 
 
#ifdef __has_attribute
  #define ein_has_attribute(x) __has_attribute(x)
#else
  #define ein_has_attribute(__x) 0
#endif
 
#if defined(_MSC_VER)
  #define ein_has_declspec_attribute(__x) 1
#elif defined(EIN_USE_DECLSPEC) && defined(__has_declspec_attribute)
  #define ein_has_declspec_attribute(x) __has_declspec_attribute(x)
#else
  #define ein_has_declspec_attribute(__x) 0
#endif
 
 
#if ein_has_attribute(const)
  #define ein_const __attribute__((const))
#else
  #define ein_const
#endif
 
#if ein_has_attribute(pure)
  #define ein_pure __attribute__((pure))
#else
  #define ein_pure
#endif
 
 
 
#if ein_has_attribute(lifetimebound)
  #define ein_lifetimebound [[clang::lifetimebound]]
#else
  #define ein_lifetimebound
#endif
 
#if ein_has_attribute(noescape)
  #define ein_noescape __attribute__((noescape))
#else
  #define ein_noescape
#endif
 
#define ein_nodiscard [[nodiscard]]
 
 
 
 
#if ein_has_attribute(always_inline)
  #define ein_inline inline __attribute__((always_inline))
#elif defined _WIN32
  #define ein_inline __forceinline
#else
  #define ein_inline inline
#endif
 
#if ein_has_attribute(flatten)
  #define ein_flatten __attribute__((flatten))
#else
  #define ein_flatten
#endif
 
#if ein_has_attribute(artificial)
  #define ein_artificial __attribute__((artificial))
#elif ein_has_attribute(__artificial__)
  #define ein_artificial __attribute__((__artificial__))
#else
  #define ein_artificial
  #warning "[[artificial]] is not supported"
#endif
 
#if ein_has_attribute(noinline)
  #define ein_noinline __attribute__((noinline))
#else
  #define ein_noinline
#endif
 
#if ein_has_attribute(optnone)
  #define ein_optnone __attribute__((optnone))
#else
  #define ein_optnone
#endif
 
 
#if ein_has_attribute(weak)
  #define ein_weak __attribute__((weak))
#else
  #define ein_weak
#endif
 
#if ein_has_attribute(internal_linkage)
  #define ein_internal_linkage __attribute__((internal_linkage))
#else
  #define ein_internal_linkage
#endif
 
#if __has_cpp_attribute(clang::preferred_name)
  #define ein_preferred_name(x) [[clang::preferred_name(__x)]]
#else
  #define ein_preferred_name(__x)
#endif
 
 
#if ein_has_attribute(__visibility__)
  #define ein_visibility(...) __attribute__((__visibility__(__VA_ARGS__)))
#else
  #define ein_visibility(...)
  #warning "[[visibility]] is not supported"
#endif
 
#if ein_has_attribute(exclude_from_explicit_instantiation)
  #define ein_exclude_from_explicit_instantiation __attribute__((exclude_from_explicit_instantiation))
#else
  #define ein_exclude_from_explicit_instantiation
  #warning "[[exclude_from_explicit_instantiation]] is not supported"
#endif
 
#define ein_hidden ein_visibility("hidden") ein_exclude_from_explicit_instantiation
 
 
 
#if __cpp_constinit
  #define ein_constinit constinit
#elif ein_has_attribute(require_constant_initialization)
  #define ein_constinit __attribute__((require_constant_initialization))
#else
  #define ein_constinit
#endif
 
#if ein_has_attribute(uninitialized)
  #define ein_uninitialized __attribute__((uninitialized))
#else
  #define ein_uninitialized
#endif
 
#if __has_cpp_attribute(clang::reinitializes)
  #define ein_reinitializes [[clang::reinitializes]]
#else
  #define ein_reinitializes
#endif