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Simplify constexpr checks

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This commit is contained in:
Victor Zverovich 2024-01-11 19:51:10 -08:00
parent e470ba8b7b
commit 170ffb1ff8
1 changed files with 34 additions and 31 deletions
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65
include/fmt/base.h
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@ -109,16 +109,19 @@
# define FMT_DEPRECATED /* deprecated */
#endif
// Check if relaxed C++14 constexpr is supported.
// GCC doesn't allow throw in constexpr until version 6 (bug 67371).
#ifndef FMT_USE_CONSTEXPR
# if (FMT_HAS_FEATURE(cxx_relaxed_constexpr) || FMT_MSC_VERSION >= 1912 || \
(FMT_GCC_VERSION >= 600 && FMT_CPLUSPLUS >= 201402L)) && \
!FMT_ICC_VERSION && (!defined(__NVCC__) || FMT_CPLUSPLUS >= 202002L)
# define FMT_USE_CONSTEXPR 1
# else
# define FMT_USE_CONSTEXPR 0
# endif
// Detect C++14 relaxed constexpr.
#ifdef FMT_USE_CONSTEXPR
// Use the provided definition.
#elif FMT_GCC_VERSION >= 600 && FMT_CPLUSPLUS >= 201402L
// GCC only allows throw in constexpr since version 6:
// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67371.
# define FMT_USE_CONSTEXPR 1
#elif FMT_ICC_VERSION
# define FMT_USE_CONSTEXPR 0 // https://github.com/fmtlib/fmt/issues/1628
#elif FMT_HAS_FEATURE(cxx_relaxed_constexpr) || FMT_MSC_VERSION >= 1912
# define FMT_USE_CONSTEXPR 1
#else
# define FMT_USE_CONSTEXPR 0
#endif
#if FMT_USE_CONSTEXPR
# define FMT_CONSTEXPR constexpr
@ -126,17 +129,33 @@
# define FMT_CONSTEXPR
#endif
#if (FMT_CPLUSPLUS >= 202002L || \
(FMT_CPLUSPLUS >= 201709L && FMT_GCC_VERSION >= 1002)) && \
((!FMT_GLIBCXX_RELEASE || FMT_GLIBCXX_RELEASE >= 10) && \
(!FMT_LIBCPP_VERSION || FMT_LIBCPP_VERSION >= 10000) && \
(!FMT_MSC_VERSION || FMT_MSC_VERSION >= 1928)) && \
#if (FMT_CPLUSPLUS >= 202002L || \
(FMT_CPLUSPLUS >= 201709L && FMT_GCC_VERSION >= 1002)) && \
((!FMT_GLIBCXX_RELEASE || FMT_GLIBCXX_RELEASE >= 10) && \
(!FMT_LIBCPP_VERSION || FMT_LIBCPP_VERSION >= 10000) && \
(!FMT_MSC_VERSION || FMT_MSC_VERSION >= 1928)) && \
defined(__cpp_lib_is_constant_evaluated)
# define FMT_CONSTEXPR20 constexpr
#else
# define FMT_CONSTEXPR20
#endif
#ifndef FMT_CONSTEVAL
# if ((FMT_GCC_VERSION >= 1000 || FMT_CLANG_VERSION >= 1101) && \
(!defined(__apple_build_version__) || \
__apple_build_version__ >= 14000029L) && \
FMT_CPLUSPLUS >= 202002L) || \
(defined(__cpp_consteval) && \
(!FMT_MSC_VERSION || FMT_MSC_VERSION >= 1929))
// consteval is broken in MSVC before VS2019 version 16.10 and Apple clang
// before 14.
# define FMT_CONSTEVAL consteval
# define FMT_HAS_CONSTEVAL
# else
# define FMT_CONSTEVAL
# endif
#endif
// Disable [[noreturn]] on MSVC/NVCC because of bogus unreachable code warnings.
#if FMT_EXCEPTIONS && FMT_HAS_CPP_ATTRIBUTE(noreturn) && !FMT_MSC_VERSION && \
!defined(__NVCC__)
@ -221,22 +240,6 @@
# define FMT_UNICODE !FMT_MSC_VERSION
#endif
#ifndef FMT_CONSTEVAL
# if ((FMT_GCC_VERSION >= 1000 || FMT_CLANG_VERSION >= 1101) && \
(!defined(__apple_build_version__) || \
__apple_build_version__ >= 14000029L) && \
FMT_CPLUSPLUS >= 202002L) || \
(defined(__cpp_consteval) && \
(!FMT_MSC_VERSION || FMT_MSC_VERSION >= 1929))
// consteval is broken in MSVC before VS2019 version 16.10 and Apple clang
// before 14.
# define FMT_CONSTEVAL consteval
# define FMT_HAS_CONSTEVAL
# else
# define FMT_CONSTEVAL
# endif
#endif
#ifndef FMT_USE_NONTYPE_TEMPLATE_ARGS
# if defined(__cpp_nontype_template_args) && \
((FMT_GCC_VERSION >= 903 && FMT_CPLUSPLUS >= 201709L) || \