std::formatter<std::queue>

 

C++

Compiler support

Freestanding and hosted

Language

Standard library

Standard library headers

Named requirements

Feature test macros(C++20)

Language support library

Concepts library(C++20)

Diagnostics library

Memory management library

Metaprogramming library(C++11)

General utilities library

Containers library

Iterators library

Ranges library(C++20)

Algorithms library

Strings library

Text processing library

Numerics library

Date and time library

Input/output library

Filesystem library(C++17)

Concurrency support library(C++11)

Execution control library(C++26)

Technical specifications

Symbols index

External libraries

 

Containers library

node-handle (C++17)

Sequence

array (C++11)

vector

vector<bool>

inplace_vector (C++26)

hive (C++26)

deque

forward_list (C++11)

list

Associative

set

multiset

map

multimap

Unordered associative

unordered_set (C++11)

unordered_multiset (C++11)

unordered_map (C++11)

unordered_multimap (C++11)

Adaptors

stack

queue

priority_queue

flat_set (C++23)

flat_multiset (C++23)

flat_map (C++23)

flat_multimap (C++23)

Views

span (C++20)

mdspan (C++23)

Tables

Iterator invalidation

Member function table

Non-member function table

 

std::queue

Member functions

queue::queue

queue::~queue

queue::operator=

Element access

queue::front

queue::back

Capacity

queue::empty

queue::size

Modifiers

queue::push

queue::push_range (C++23)

queue::emplace (C++11)

queue::pop

queue::swap (C++11)

Non-member functions

swap(std::queue) (C++11)

operator==operator!=operator<operator>operator<=operator>=operator<=> (C++20)

Helper classes

uses_allocator<std::queue> (C++11)

formatter<std::queue> (C++23)

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 > constexprauto 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)