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Remove range_mapper

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This commit is contained in:
Victor Zverovich
2024-09-16 20:24:30 -07:00
parent 503dff93ec
commit a25e594f6a
1 changed files with 3 additions and 26 deletions
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29
include/fmt/ranges.h
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@ -350,29 +350,8 @@ template <typename T, typename Char> struct is_range {
namespace detail {
template <typename Context> struct range_mapper {
using mapper = type_mapper<typename Context::char_type>;
using char_type = typename Context::char_type;
template <typename T,
FMT_ENABLE_IF(std::is_constructible<
formatter<remove_cvref_t<T>, char_type>>::value)>
static auto map(T&& value) -> T&& {
return static_cast<T&&>(value);
}
template <typename T,
FMT_ENABLE_IF(!std::is_constructible<
formatter<remove_cvref_t<T>, char_type>>::value)>
static auto map(T&& value) -> decltype(mapper::map(static_cast<T&&>(value))) {
return mapper::map(static_cast<T&&>(value));
}
};
template <typename Char, typename Element>
using range_formatter_type =
formatter<remove_cvref_t<decltype(range_mapper<buffered_context<Char>>{}
.map(std::declval<Element>()))>,
Char>;
using range_formatter_type = formatter<remove_cvref_t<Element>, Char>;
template <typename R>
using maybe_const_range =
@ -485,7 +464,6 @@ struct range_formatter<
template <typename R, typename FormatContext>
auto format(R&& range, FormatContext& ctx) const -> decltype(ctx.out()) {
auto mapper = detail::range_mapper<buffered_context<Char>>();
auto out = ctx.out();
auto it = detail::range_begin(range);
auto end = detail::range_end(range);
@ -497,7 +475,7 @@ struct range_formatter<
if (i > 0) out = detail::copy<Char>(separator_, out);
ctx.advance_to(out);
auto&& item = *it; // Need an lvalue
out = underlying_.format(mapper.map(item), ctx);
out = underlying_.format(item, ctx);
++i;
}
out = detail::copy<Char>(closing_bracket_, out);
@ -593,12 +571,11 @@ struct formatter<
basic_string_view<Char> open = detail::string_literal<Char, '{'>{};
if (!no_delimiters_) out = detail::copy<Char>(open, out);
int i = 0;
auto mapper = detail::range_mapper<buffered_context<Char>>();
basic_string_view<Char> sep = detail::string_literal<Char, ',', ' '>{};
for (auto&& value : map) {
if (i > 0) out = detail::copy<Char>(sep, out);
ctx.advance_to(out);
detail::for_each2(formatters_, mapper.map(value),
detail::for_each2(formatters_, value,
detail::format_tuple_element<FormatContext>{
0, ctx, detail::string_literal<Char, ':', ' '>{}});
++i;