std::formatter<std::queue>

 

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Deduction guides(C++17)

 

Defined in header <queue>
template< class CharT, class T, std::formattable<CharT> Container, class... U > struct formatter<std::queue<T, Container, U...>, CharT>;		(since C++23)

The template specialization of std::formatter for the container adaptor type std::queue allows users to convert the underlying container to its textual representation as a collection of elements using formatting functions.

The specialization is enabled if std::formattable<Container, CharT> is true.

Member types

Name	Definition
maybe-const-container	fmt-maybe-const <Container, CharT> (exposition-only member type*)
maybe-const-adaptor	maybe-const <     std::is_const_v<maybe-const-container>,     std::queue<T, Container, U...>> (exposition-only member type*)

Data members

Name	Definition
underlying_	underlying formatter of type std::formatter<ranges::ref_view<maybe-const-container>, CharT> (exposition-only member object*)

Member functions

parse	parses the format specifier as specified by range-format-spec (public member function)
format	writes the range formatted output as specified by range-format-spec (public member function)

std::formatter<std::queue>::parse

template< class ParseContext > constexpr auto parse( ParseContext& ctx ) -> ParseContext::iterator;

Equivalent to return underlying_ .parse(ctx);.

Return value

An iterator past the end of the range-format-spec of the underlying container.

std::formatter<std::queue>::format

template< class FormatContext > auto format( /*maybe-const-adaptor*/& r, FormatContext& ctx ) const     -> FormatContext::iterator;

Equivalent to return underlying_ .format(r.c, ctx);.

Return value

An iterator past the end of the output range.

See also

formatter (C++20)	defines formatting rules for a given type (class template)
range_formatter (C++23)	class template that helps implementing std::formatter specializations for range types (class template)