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Fix copy_str performance

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This commit is contained in:
Roman Koshelev 2021-08-31 07:51:06 +03:00
parent 34caecd6b6
commit 97c7e066fb
1 changed files with 1 additions and 12 deletions
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13
include/fmt/core.h
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@ -742,18 +742,7 @@ inline auto get_container(std::back_insert_iterator<Container> it)
template <typename Char, typename InputIt, typename OutputIt> template <typename Char, typename InputIt, typename OutputIt>
FMT_CONSTEXPR auto copy_str(InputIt begin, InputIt end, OutputIt out) FMT_CONSTEXPR auto copy_str(InputIt begin, InputIt end, OutputIt out)
-> OutputIt { -> OutputIt {
while (begin != end) *out++ = static_cast<Char>(*begin++); return std::copy(begin, end, out);
return out;
}
template <typename Char, FMT_ENABLE_IF(std::is_same<Char, char>::value)>
FMT_CONSTEXPR auto copy_str(const Char* begin, const Char* end, Char* out)
-> Char* {
if (is_constant_evaluated())
return copy_str<Char, const Char*, Char*>(begin, end, out);
auto size = to_unsigned(end - begin);
memcpy(out, begin, size);
return out + size;
} }
/** /**