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Reduce char_traits usage

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This commit is contained in:
Victor Zverovich 2024-01-03 09:59:44 -08:00
parent 61f144bd61
commit c9287eb9f7
2 changed files with 20 additions and 15 deletions
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27
include/fmt/core.h
View File

@ -8,10 +8,10 @@
#ifndef FMT_CORE_H_
#define FMT_CORE_H_
#include <cstddef> // std::byte
#include <cstdio> // std::FILE
#include <cstring> // std::strlen
#include <limits> // std::numeric_limits
#include <cstddef> // std::byte
#include <cstdio> // std::FILE
#include <cstring> // std::strlen
#include <limits> // std::numeric_limits
#include <string>
#include <type_traits>
@ -445,6 +445,12 @@ FMT_CONSTEXPR inline auto is_utf8() -> bool {
return FMT_UNICODE || (sizeof(section) == 3 && uchar(section[0]) == 0xC2 &&
uchar(section[1]) == 0xA7);
}
template <typename Char> FMT_CONSTEXPR auto length(const Char* s) -> size_t {
size_t len = 0;
while (*s++) ++len;
return len;
}
} // namespace detail
/**
@ -476,14 +482,14 @@ template <typename Char> class basic_string_view {
the size with ``std::char_traits<Char>::length``.
\endrst
*/
FMT_CONSTEXPR_CHAR_TRAITS
FMT_CONSTEXPR20
FMT_INLINE
basic_string_view(const Char* s)
: data_(s),
size_(detail::const_check(std::is_same<Char, char>::value &&
!detail::is_constant_evaluated(true))
!detail::is_constant_evaluated(false))
? std::strlen(reinterpret_cast<const char*>(s))
: std::char_traits<Char>::length(s)) {}
: detail::length(s)) {}
/** Constructs a string reference from a ``std::basic_string`` object. */
template <typename Traits, typename Alloc>
@ -519,8 +525,8 @@ template <typename Char> class basic_string_view {
return size_ >= sv.size_ &&
std::char_traits<Char>::compare(data_, sv.data_, sv.size_) == 0;
}
FMT_CONSTEXPR_CHAR_TRAITS auto starts_with(Char c) const noexcept -> bool {
return size_ >= 1 && std::char_traits<Char>::eq(*data_, c);
FMT_CONSTEXPR auto starts_with(Char c) const noexcept -> bool {
return size_ >= 1 && *data_ == c;
}
FMT_CONSTEXPR_CHAR_TRAITS auto starts_with(const Char* s) const -> bool {
return starts_with(basic_string_view<Char>(s));
@ -1544,8 +1550,7 @@ template <> struct is_output_iterator<appender, char> : std::true_type {};
template <typename It, typename T>
struct is_output_iterator<
It, T,
void_t<decltype(*std::declval<It&>()++ = std::declval<T>())>>
It, T, void_t<decltype(*std::declval<It&>()++ = std::declval<T>())>>
: std::true_type {};
template <typename It> struct is_back_insert_iterator : std::false_type {};

8
include/fmt/format.h
View File

@ -38,10 +38,10 @@
#include <cstring> // std::memcpy
#include <initializer_list> // std::initializer_list
#include <iterator>
#include <limits> // std::numeric_limits
#include <memory> // std::uninitialized_copy
#include <stdexcept> // std::runtime_error
#include <system_error> // std::system_error
#include <limits> // std::numeric_limits
#include <memory> // std::uninitialized_copy
#include <stdexcept> // std::runtime_error
#include <system_error> // std::system_error
#ifdef __cpp_lib_bit_cast
# include <bit> // std::bit_cast