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Improvements detection of features, part 10.

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HedgehogInTheCPP 2026-08-21 22:14:05 +03:00
parent 2a3b40031e
commit 8cbb0944f3
1 changed files with 16 additions and 24 deletions
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40
include/fast_float/constexpr_feature_detect.h
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@ -10,9 +10,9 @@
// C++14 constexpr
#if defined(__cpp_constexpr) && __cpp_constexpr >= 201304L
#define FASTFLOAT_CONSTEXPR14 constexpr
#elif defined(__cplusplus) && __cplusplus >= 201402L
#elif __cplusplus >= 201402L
#define FASTFLOAT_CONSTEXPR14 constexpr
#elif defined(_MSC_VER) && defined(_MSVC_LANG) && _MSVC_LANG >= 201402L
#elif defined(_MSC_VER) && _MSC_VER >= 1910 && _MSVC_LANG >= 201402L
#define FASTFLOAT_CONSTEXPR14 constexpr
#else
#define FASTFLOAT_CONSTEXPR14
@ -21,10 +21,10 @@
// C++14 variable templates
#if defined(__cpp_variable_templates) && __cpp_variable_templates >= 201304L
#define FASTFLOAT_HAS_VARIABLE_TEMPLATES 1
#elif defined(__cplusplus) && __cplusplus >= 201402L
#elif __cplusplus >= 201402L
#define FASTFLOAT_HAS_VARIABLE_TEMPLATES 1
#elif defined(_MSC_FULL_VER) && _MSC_FULL_VER >= 190023918L && \
defined(_MSVC_LANG) && _MSVC_LANG >= 201402L
_MSVC_LANG >= 201402L
#define FASTFLOAT_HAS_VARIABLE_TEMPLATES 1
#else
#define FASTFLOAT_HAS_VARIABLE_TEMPLATES 0
@ -35,9 +35,9 @@
#define FASTFLOAT_CONSTEXPR17 constexpr
#elif defined(__cpp_constexpr) && __cpp_constexpr >= 201603L
#define FASTFLOAT_CONSTEXPR17 constexpr
#elif defined(__cplusplus) && __cplusplus >= 201703L
#elif __cplusplus >= 201703L
#define FASTFLOAT_CONSTEXPR17 constexpr
#elif defined(_MSC_VER) && defined(_MSVC_LANG) && _MSVC_LANG >= 201703L
#elif defined(_MSC_VER) && _MSC_VER >= 1911 && _MSVC_LANG >= 201703L
#define FASTFLOAT_CONSTEXPR17 constexpr
#else
#define FASTFLOAT_CONSTEXPR17
@ -46,17 +46,16 @@
// C++17 inline variables
#if defined(__cpp_inline_variables) && __cpp_inline_variables >= 201606L
#define FASTFLOAT_INLINE_VARIABLE inline constexpr
#elif defined(__cplusplus) && __cplusplus >= 201703L
#elif __cplusplus >= 201703L
#define FASTFLOAT_INLINE_VARIABLE inline constexpr
#elif defined(_MSC_VER) && defined(_MSVC_LANG) && _MSVC_LANG >= 201703L
#elif defined(_MSC_VER) && _MSC_VER >= 1912 && _MSVC_LANG >= 201703L
#define FASTFLOAT_INLINE_VARIABLE inline constexpr
#else
#define FASTFLOAT_INLINE_VARIABLE static constexpr
#endif
// Before C++17, constexpr variables may need an out-of-class definition.
#if (defined(__cplusplus) && __cplusplus >= 201703L) || \
(defined(_MSVC_LANG) && _MSVC_LANG >= 201703L)
#if __cplusplus >= 201703L || _MSVC_LANG >= 201703L
#define FASTFLOAT_DETAIL_MUST_DEFINE_CONSTEXPR_VARIABLE 0
#else
#define FASTFLOAT_DETAIL_MUST_DEFINE_CONSTEXPR_VARIABLE 1
@ -69,28 +68,21 @@
#define FASTFLOAT_HAS_BIT_CAST 0
#endif
// C++20 std::is_constant_evaluated
// C++20 constexpr library support, including std::is_constant_evaluated(),
// std::bit_cast(), std::copy and std::fill, and constexpr algorithms. Therefore
// all required library feature macros must be present.
#if defined(__cpp_lib_is_constant_evaluated) && \
__cpp_lib_is_constant_evaluated >= 201811L && defined(__cpp_consteval) && \
__cpp_consteval >= 201811L
#define FASTFLOAT_HAS_IS_CONSTANT_EVALUATED 1
__cpp_consteval >= 201811L && FASTFLOAT_HAS_BIT_CAST
#define FASTFLOAT_CONSTEVAL consteval
#else
#define FASTFLOAT_HAS_IS_CONSTANT_EVALUATED 0
#define FASTFLOAT_CONSTEVAL
#endif
// C++20 constexpr library support, including std::is_constant_evaluated(),
// std::bit_cast(), and constexpr algorithms. Therefore all required library
// feature macros must be present.
#if FASTFLOAT_HAS_IS_CONSTANT_EVALUATED && FASTFLOAT_HAS_BIT_CAST && \
defined(__cpp_lib_constexpr_algorithms) && \
__cpp_lib_constexpr_algorithms >= 201806L
#define FASTFLOAT_CONSTEXPR20 constexpr
#define FASTFLOAT_IS_CONSTEXPR 1
#define FASTFLOAT_HAS_IS_CONSTANT_EVALUATED 1
#else
#define FASTFLOAT_CONSTEVAL
#define FASTFLOAT_CONSTEXPR20
#define FASTFLOAT_IS_CONSTEXPR 0
#define FASTFLOAT_HAS_IS_CONSTANT_EVALUATED 0
#endif
// C++20 std::byteswap