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fix #2210

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This commit is contained in:
Elliot Haisley 2021-04-04 23:30:23 -04:00
parent 95da484727
commit df6827edb9
1 changed files with 9 additions and 5 deletions
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14
include/fmt/core.h
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@ -98,6 +98,13 @@
# define FMT_CONSTEXPR_DECL
#endif
// C++17's char_traits::length() is constexpr.
#if __cplusplus >= 201703L
# define FMT_CONSTEXPR_CHAR_TRAITS_LENGTH FMT_CONSTEXPR
#else
# define FMT_CONSTEXPR_CHAR_TRAITS_LENGTH
#endif
#ifndef FMT_OVERRIDE
# if FMT_HAS_FEATURE(cxx_override_control) || \
(FMT_GCC_VERSION >= 408 && FMT_HAS_GXX_CXX11) || FMT_MSC_VER >= 1900
@ -392,11 +399,8 @@ template <typename Char> class basic_string_view {
the size with ``std::char_traits<Char>::length``.
\endrst
*/
#if __cplusplus >= 201703L // C++17's char_traits::length() is constexpr.
FMT_CONSTEXPR
#endif
FMT_INLINE basic_string_view(const Char* s) : data_(s) {
if (std::is_same<Char, char>::value && !detail::is_constant_evaluated())
FMT_CONSTEXPR_CHAR_TRAITS_LENGTH FMT_INLINE basic_string_view(const Char* s) : data_(s) {
if FMT_CONSTEXPR_CHAR_TRAITS_LENGTH (std::is_same<Char, char>::value && !detail::is_constant_evaluated())
size_ = std::strlen(reinterpret_cast<const char*>(s));
else
size_ = std::char_traits<Char>::length(s);