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Optimize standard formatter specialization

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This commit is contained in:
Victor Zverovich 2021-05-09 07:11:35 -07:00
parent cd2c78fb8a
commit 6214f15a0c
1 changed files with 10 additions and 6 deletions
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16
include/fmt/format.h
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@ -2897,12 +2897,16 @@ struct formatter<T, Char,
template <typename FormatContext>
FMT_CONSTEXPR auto format(const T& val, FormatContext& ctx) const
-> decltype(ctx.out()) {
auto specs = specs_;
detail::handle_dynamic_spec<detail::width_checker>(specs.width,
specs.width_ref, ctx);
detail::handle_dynamic_spec<detail::precision_checker>(
specs.precision, specs.precision_ref, ctx);
return detail::write<Char>(ctx.out(), val, specs, ctx.locale());
if (specs_.width_ref.kind != detail::arg_id_kind::none ||
specs_.precision_ref.kind != detail::arg_id_kind::none) {
auto specs = specs_;
detail::handle_dynamic_spec<detail::width_checker>(specs.width,
specs.width_ref, ctx);
detail::handle_dynamic_spec<detail::precision_checker>(
specs.precision, specs.precision_ref, ctx);
return detail::write<Char>(ctx.out(), val, specs, ctx.locale());
}
return detail::write<Char>(ctx.out(), val, specs_, ctx.locale());
}
private: