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Optimize range formatter

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This commit is contained in:
Victor Zverovich 2022-11-26 08:50:46 -08:00
parent a69e43c9d7
commit fae6f7e081
2 changed files with 11 additions and 18 deletions
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4
include/fmt/core.h
View File

@ -3121,8 +3121,8 @@ struct formatter<T, Char,
U == detail::type::cstring_type ||
U == detail::type::char_type),
int> = 0>
FMT_CONSTEXPR void set_debug_format() {
specs_.type = presentation_type::debug;
FMT_CONSTEXPR void set_debug_format(bool set = true) {
specs_.type = set ? presentation_type::debug : presentation_type::none;
}
template <typename FormatContext>

25
include/fmt/ranges.h
View File

@ -440,20 +440,20 @@ struct range_formatter<
detail::string_literal<Char, ']'>{};
template <class U>
FMT_CONSTEXPR static auto maybe_set_debug_format(U& u, int)
-> decltype(u.set_debug_format()) {
u.set_debug_format();
FMT_CONSTEXPR static auto maybe_set_debug_format(U& u, bool set)
-> decltype(u.set_debug_format(set)) {
u.set_debug_format(set);
}
template <class U>
FMT_CONSTEXPR static void maybe_set_debug_format(U&, ...) {}
FMT_CONSTEXPR void maybe_set_debug_format() {
maybe_set_debug_format(underlying_, 0);
FMT_CONSTEXPR void maybe_set_debug_format(bool set) {
maybe_set_debug_format(underlying_, set);
}
public:
FMT_CONSTEXPR range_formatter() {}
FMT_CONSTEXPR range_formatter() { maybe_set_debug_format(true); }
FMT_CONSTEXPR auto underlying() -> detail::range_formatter_type<Char, T>& {
return underlying_;
@ -473,25 +473,18 @@ struct range_formatter<
FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
auto it = ctx.begin();
auto end = ctx.end();
if (it == end || *it == '}') {
maybe_set_debug_format();
return underlying_.parse(ctx);
}
if (*it == 'n') {
if (it != end && *it == 'n') {
set_brackets({}, {});
++it;
}
if (*it == '}') {
maybe_set_debug_format();
ctx.advance_to(it);
return underlying_.parse(ctx);
}
if (it == end || *it == '}') return it;
if (*it != ':')
FMT_THROW(format_error("no other top-level range formatters supported"));
maybe_set_debug_format(false);
custom_specs_ = true;
++it;
ctx.advance_to(it);