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Split range and map formatters

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This commit is contained in:
Victor Zverovich 2024-05-04 09:18:35 -07:00
parent 3af8ac7a06
commit 77bfd8499a
1 changed files with 69 additions and 22 deletions
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91
include/fmt/ranges.h
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@ -511,37 +511,25 @@ struct range_format_kind
template <typename R, typename Char>
struct formatter<
R, Char,
enable_if_t<conjunction<bool_constant<range_format_kind<R, Char>::value !=
range_format::disabled>
enable_if_t<conjunction<
bool_constant<range_format_kind<R, Char>::value !=
range_format::disabled &&
range_format_kind<R, Char>::value != range_format::map>
// Workaround a bug in MSVC 2015 and earlier.
#if !FMT_MSC_VERSION || FMT_MSC_VERSION >= 1910
,
detail::is_formattable_delayed<R, Char>
,
detail::is_formattable_delayed<R, Char>
#endif
>::value>> {
>::value>> {
private:
using range_type = detail::maybe_const_range<R>;
range_formatter<detail::uncvref_type<range_type>, Char> range_formatter_;
FMT_CONSTEXPR void init(detail::range_format_constant<range_format::set>) {
range_formatter_.set_brackets(detail::string_literal<Char, '{'>{},
detail::string_literal<Char, '}'>{});
}
FMT_CONSTEXPR void init(detail::range_format_constant<range_format::map>) {
range_formatter_.set_brackets(detail::string_literal<Char, '{'>{},
detail::string_literal<Char, '}'>{});
range_formatter_.underlying().set_brackets({}, {});
range_formatter_.underlying().set_separator(
detail::string_literal<Char, ':', ' '>{});
}
FMT_CONSTEXPR void init(
detail::range_format_constant<range_format::sequence>) {}
public:
FMT_CONSTEXPR formatter() {
init(detail::range_format_constant<range_format_kind<R, Char>::value>());
if (range_format_kind<R, Char>::value != range_format::set) return;
range_formatter_.set_brackets(detail::string_literal<Char, '{'>{},
detail::string_literal<Char, '}'>{});
}
template <typename ParseContext>
@ -556,6 +544,65 @@ struct formatter<
}
};
template <typename R, typename Char>
struct formatter<
R, Char,
enable_if_t<range_format_kind<R, Char>::value == range_format::map>> {
private:
using map_type = detail::maybe_const_range<R>;
detail::range_formatter_type<Char, detail::uncvref_type<map_type>>
underlying_;
bool no_delimiters_ = false;
public:
FMT_CONSTEXPR formatter() {
underlying_.set_brackets({}, {});
underlying_.set_separator(detail::string_literal<Char, ':', ' '>{});
}
template <typename ParseContext>
FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
auto it = ctx.begin();
auto end = ctx.end();
detail::maybe_set_debug_format(underlying_, true);
if (it == end) return underlying_.parse(ctx);
if (detail::to_ascii(*it) == 'n') {
no_delimiters_ = true;
++it;
}
if (it != end && *it != '}') {
if (*it != ':') report_error("invalid format specifier");
detail::maybe_set_debug_format(underlying_, false);
++it;
}
ctx.advance_to(it);
return underlying_.parse(ctx);
}
template <typename FormatContext>
auto format(map_type& map, FormatContext& ctx) const -> decltype(ctx.out()) {
auto mapper = detail::range_mapper<buffered_context<Char>>();
auto out = ctx.out();
auto it = detail::range_begin(map);
auto end = detail::range_end(map);
basic_string_view<Char> open = detail::string_literal<Char, '{'>{};
if (!no_delimiters_) out = detail::copy<Char>(open, out);
int i = 0;
basic_string_view<Char> sep = detail::string_literal<Char, ',', ' '>{};
for (; it != end; ++it) {
if (i > 0) out = detail::copy<Char>(sep, out);
ctx.advance_to(out);
out = underlying_.format(mapper.map(*it), ctx);
++i;
}
basic_string_view<Char> close = detail::string_literal<Char, '}'>{};
if (!no_delimiters_) out = detail::copy<Char>(close, out);
return out;
}
};
template <typename It, typename Sentinel, typename Char = char>
struct join_view : detail::view {
It begin;