Namespaces
Variants

deduction guides for std::flat_map

From cppreference.net

C++
Containers library
std::flat_map
Member types
Member functions
Non-member functions
Helper classes
Tags
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.

Example

This section is incomplete
Reason: no example