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Detect consteval

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This commit is contained in:
Victor Zverovich
2021-06-06 17:35:40 -07:00
parent d551b88a6d
commit 2039dce75f
3 changed files with 12 additions and 45 deletions
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20
include/fmt/core.h
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@@ -284,8 +284,16 @@
# define FMT_UNICODE !FMT_MSC_VER
#endif
#ifndef FMT_COMPILE_TIME_CHECKS
# define FMT_COMPILE_TIME_CHECKS 0
#ifndef FMT_CONSTEVAL
# if ((FMT_GCC_VERSION >= 1000 || FMT_CLANG_VERSION >= 1101) && \
__cplusplus > 201703L) || \
(defined(__cpp_consteval) && \
!FMT_MSC_VER) // consteval is broken in MSVC.
# define FMT_CONSTEVAL consteval
# define FMT_HAS_CONSTEVAL
# else
# define FMT_CONSTEVAL
# endif
#endif
#ifndef FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
@@ -2813,17 +2821,13 @@ template <typename Char, typename... Args> class basic_format_string {
template <typename S,
FMT_ENABLE_IF(
std::is_convertible<const S&, basic_string_view<Char>>::value)>
#if FMT_COMPILE_TIME_CHECKS
consteval
#endif
basic_format_string(const S& s)
: str_(s) {
FMT_CONSTEVAL basic_format_string(const S& s) : str_(s) {
static_assert(
detail::count<
(std::is_base_of<detail::view, remove_reference_t<Args>>::value &&
std::is_reference<Args>::value)...>() == 0,
"passing views as lvalues is disallowed");
#if FMT_COMPILE_TIME_CHECKS
#ifdef FMT_HAS_CONSTEVAL
if constexpr (detail::count_named_args<Args...>() == 0) {
using checker = detail::format_string_checker<Char, detail::error_handler,
remove_cvref_t<Args>...>;