deduction guides for std::flat_map

 

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

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::flat_map

Member types

Member functions

flat_map::flat_map flat_map::operator= Element access flat_map::at flat_map::operator[] Iterators flat_map::beginflat_map::cbegin flat_map::endflat_map::cend flat_map::rbeginflat_map::crbegin flat_map::rendflat_map::crend Lookup flat_map::count flat_map::find flat_map::contains flat_map::equal_range    flat_map::lower_bound flat_map::upper_bound Capacity flat_map::size flat_map::max_size flat_map::empty Modifiers flat_map::clear flat_map::erase flat_map::swap flat_map::emplace flat_map::extract flat_map::replace flat_map::insert flat_map::insert_range flat_map::insert_or_assign flat_map::emplace_hint flat_map::try_emplace Observers flat_map::key_comp flat_map::keys flat_map::value_comp flat_map::values

Non-member functions

operator==operator<=>         swap(std::flat_map) erase_if(std::flat_map)

Helper classes

uses_allocator<std::flat_map>

Tags

sorted_unique       sorted_unique_t

Deduction guides

 

Defined in header <flat_map>
template< class KeyContainer, class MappedContainer, class Compare = std::less<typename KeyContainer::value_type> > flat_map( KeyContainer, MappedContainer, Compare = Compare() ) -> flat_map<typename KeyContainer::value_type, typename MappedContainer::value_type, Compare, KeyContainer, MappedContainer>;	(1)	(since C++23)
template< class KeyContainer, class MappedContainer, class Allocator > flat_map( KeyContainer, MappedContainer, Allocator ) -> flat_map<typename KeyContainer::value_type, typename MappedContainer::value_type, std::less<typename KeyContainer::value_type>, KeyContainer, MappedContainer>;	(2)	(since C++23)
template< class KeyContainer, class MappedContainer, class Compare, class Allocator > flat_map( KeyContainer, MappedContainer, Compare, Allocator ) -> flat_map<typename KeyContainer::value_type, typename MappedContainer::value_type, Compare, KeyContainer, MappedContainer>;	(3)	(since C++23)
template< class KeyContainer, class MappedContainer, class Compare = std::less<typename KeyContainer::value_type> > flat_map( std::sorted_unique_t, KeyContainer, MappedContainer, Compare = Compare() ) -> flat_map<typename KeyContainer::value_type, typename MappedContainer::value_type, Compare, KeyContainer, MappedContainer>;	(4)	(since C++23)
template< class KeyContainer, class MappedContainer, class Allocator > flat_map( std::sorted_unique_t, KeyContainer, MappedContainer, Allocator ) -> flat_map<typename KeyContainer::value_type, typename MappedContainer::value_type, std::less<typename KeyContainer::value_type>, KeyContainer, MappedContainer>;	(5)	(since C++23)
template< class KeyContainer, class MappedContainer, class Compare, class Allocator> flat_map( std::sorted_unique_t, KeyContainer, MappedContainer, Compare, Allocator ) -> flat_map<typename KeyContainer::value_type, typename MappedContainer::value_type, Compare, KeyContainer, MappedContainer>;	(6)	(since C++23)
template< class InputIt, class Compare = std::less</*iter-key-t*/<InputIt>> > flat_map( InputIt, InputIt, Compare = Compare() ) -> flat_map</*iter-key-t*/<InputIt>, /*iter-mapped-t*/<InputIt>, Compare>;	(7)	(since C++23)
template< class InputIt, class Compare = std::less</*iter-key-t*/<InputIt>> > flat_map( std::sorted_unique_t, InputIt, InputIt, Compare = Compare() ) -> flat_map</*iter-key-t*/<InputIt>, /*iter-mapped-t*/<InputIt>, Compare>;	(8)	(since C++23)
template< ranges::input_range R, class Compare = std::less</*range-key-t*/<R>>, class Allocator = allocator<byte> > flat_map( std::from_range_t, R&&, Compare = Compare(), Allocator = Allocator() ) -> flat_map</*range-key-t*/<R>, /*range-mapped-t*/<R>, Compare, std::vector</*range-key-t*/<R>, /*alloc-rebind*/<Allocator, /*range-key-t*/<R>>>, std::vector</*range-mapped-t*/<R>, /*alloc-rebind*/<Allocator, /*range-mapped-t*/<R>>>>;	(9)	(since C++23)
template< ranges::input_range R, class Allocator > flat_map( std::from_range_t, R&&, Allocator ) -> flat_map</*range-key-t*/<R>, /*range-mapped-t*/<R>, std::less</*range-key-t*/<R>>, std::vector</*range-key-t*/<R>, /*alloc-rebind*/<Allocator, /*range-key-t*/<R>>>, std::vector</*range-mapped-t*/<R>, /*alloc-rebind*/<Allocator, /*range-mapped-t*/<R>>>>;	(10)	(since C++23)
template< class Key, class T, class Compare = std::less<Key> > flat_map( std::initializer_list<pair<Key, T>>, Compare = Compare() ) -> flat_map<Key, T, Compare>;	(11)	(since C++23)
template< class Key, class T, class Compare = std::less<Key> > flat_map( std::sorted_unique_t, std::initializer_list<pair<Key, T>>, Compare = Compare() ) -> flat_map<Key, T, Compare>;	(12)	(since C++23)
Exposition-only helper type aliases
template< class InputIt > using /*iter-val-t*/ = typename std::iterator_traits<InputIt>::value_type;		(exposition only*)
template< class InputIt > using /*iter-key-t*/ = std::remove_const_t< std::tuple_element_t<0, /*iter-val-t*/<InputIt>>>;		(exposition only*)
template< class InputIt > using /*iter-mapped-t*/ = std::tuple_element_t<1, /*iter-val-t*/<InputIt>>;		(exposition only*)
template< class Allocator, class T > using /*alloc-rebind*/ = typename std::allocator_traits<Allocator>::template rebind_alloc<T>;		(exposition only*)
template< ranges::input_range Range > using /*range-key-t*/ = std::remove_const_t<typename ranges::range_value_t<Range>::first_type>;		(exposition only*)
template< ranges::input_range Range > using /*range-mapped-t*/ = typename ranges::range_value_t<Range>::second_type;		(exposition only*)

These deduction guides are provided for to allow deduction from:

1) A key-container, a mapped-container and a comparator.

2) A key-container, a mapped-container and an allocator.

3) A key-container, a mapped-container, a comparator and an allocator.

4) The std::sorted_unique_t tag, a key-container, a mapped-container and a comparator.

5) The std::sorted_unique_t tag, a key-container, a mapped-container and an allocator.

6) The std::sorted_unique_t tag, a key-container, a mapped-container, a comparator and an allocator.

7) An iterator range and a comparator.

8) The std::sorted_unique_t tag, an iterator range and a comparator.

9) The std::from_range_t tag, an input_range range, a comparator and an allocator.

10) The std::from_range_t tag, an input_range range and an allocator.

11) The std::initializer_list and a comparator.

12) The std::sorted_unique_t tag, the std::initializer_list and a comparator.

These overloads participate in overload resolution only if InputIt satisfies LegacyInputIterator, Alloc satisfies Allocator, and Comp does not satisfy Allocator.

Note: the extent to which the library determines that a type does not satisfy LegacyInputIterator is unspecified, except that as a minimum integral types do not qualify as input iterators. Likewise, the extent to which it determines that a type does not satisfy Allocator is unspecified, except that as a minimum the member type Alloc::value_type must exist and the expression std::declval<Alloc&>().allocate(std::size_t{}) must be well-formed when treated as an unevaluated operand.