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Remove dependency on string_view

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This commit is contained in:
Victor Zverovich
2024-01-03 15:34:43 -08:00
parent f2e43f967c
commit 800a0bb23f
3 changed files with 68 additions and 61 deletions
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19
include/fmt/format.h
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@@ -49,6 +49,16 @@
#include "core.h"
// libc++ supports string_view in pre-c++17.
#if FMT_HAS_INCLUDE(<string_view>) && \
(FMT_CPLUSPLUS >= 201703L || defined(_LIBCPP_VERSION))
# include <string_view>
# define FMT_USE_STRING_VIEW
#elif FMT_HAS_INCLUDE("experimental/string_view") && FMT_CPLUSPLUS >= 201402L
# include <experimental/string_view>
# define FMT_USE_EXPERIMENTAL_STRING_VIEW
#endif
#if defined __cpp_inline_variables && __cpp_inline_variables >= 201606L
# define FMT_INLINE_VARIABLE inline
#else
@@ -285,6 +295,15 @@ FMT_CONSTEXPR inline void abort_fuzzing_if(bool condition) {
#endif
}
#if defined(FMT_USE_STRING_VIEW)
template <typename Char> using std_string_view = std::basic_string_view<Char>;
#elif defined(FMT_USE_EXPERIMENTAL_STRING_VIEW)
template <typename Char>
using std_string_view = std::experimental::basic_string_view<Char>;
#else
template <typename T> struct std_string_view {};
#endif
template <typename CharT, CharT... C> struct string_literal {
static constexpr CharT value[sizeof...(C)] = {C...};
constexpr operator basic_string_view<CharT>() const {