microfmt::detail::element_formatter< T > Struct Template Reference

Drop-in replacement for a formatter<T> underlying_formatter; member used by container/wrapper formatters (reloco.hpp, tuple.hpp, map_view.hpp, filter_view.hpp, ranges.hpp, variant.hpp, ...) to format their elements/keys/values. More...

#include <microfmt.hpp>

Classes
struct	no_formatter_stub

Public Types
using	DecayedT = std::decay_t< T >

Public Member Functions
constexpr void	parse (format_parse_context &ctx) noexcept
void	format (const T &value, const sink &out) const noexcept

Public Attributes
std::conditional_t< has_formatter_v< DecayedT >, formatter< DecayedT >, no_formatter_stub >	underlying {}

Detailed Description

template<typename T>
struct microfmt::detail::element_formatter< T >

Drop-in replacement for a formatter<T> underlying_formatter; member used by container/wrapper formatters (reloco.hpp, tuple.hpp, map_view.hpp, filter_view.hpp, ranges.hpp, variant.hpp, ...) to format their elements/keys/values.

Exposes the same parse(format_parse_context&) / format(const T&, const sink&) const interface as formatter<T> itself, but implements the same formatter<T> -> reloco::Display<T> -> reloco::Debug<T> priority chain as format_type_thunk above, instead of requiring a formatter<T> specialization unconditionally. This lets element types that only have a reloco::Display<T>/reloco::Debug<T> (and no formatter<T>) be nested inside containers/wrappers.

Display<T>/Debug<T> take no format spec (mirroring Rust), so parse simply discards the spec on those two paths, exactly as format_type_thunk does for a top-level {} placeholder.

Member Typedef Documentation

DecayedT

template<typename T >

using microfmt::detail::element_formatter< T >::DecayedT = std::decay_t<T>

Member Function Documentation

format()

template<typename T >

void microfmt::detail::element_formatter< T >::format ( const T &  value, const sink &  out  ) const

inlinenoexcept

parse()

template<typename T >

constexpr void microfmt::detail::element_formatter< T >::parse ( format_parse_context &  ctx )

inlineconstexprnoexcept

Member Data Documentation

underlying

template<typename T >

std::conditional_t<has_formatter_v<DecayedT>, formatter<DecayedT>, no_formatter_stub> microfmt::detail::element_formatter< T >::underlying {}

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The documentation for this struct was generated from the following file:

• include/microfmt/microfmt.hpp