std::flat_map<Key,T,Compare,KeyContainer,MappedContainer>:: value_compare
|
class
value_compare
;
|
(since C++23) | |
std::flat_map::value_compare
is a function object that compares objects of type
std::flat_map::const_reference
(a pair of references to the stored key/value) by comparing the first components (i.e. keys) of the passed pairs.
Member objects
| Member name | Definition |
comp
(private)
|
the comparison function object of type
std::flat_map::key_compare
( exposition-only member object* ) |
Member functions
|
(constructor)
(private)
|
constructs
value_compare
object
(public member function) |
|
operator()
|
compares two values of type
value_type
(public member function) |
std::flat_map<Key,T,Compare,KeyContainer,MappedContainer>::value_compare:: value_compare
|
private
:
value_compare ( key_compare c ) ; |
( exposition only* ) | |
Initializes the underlying instance of the comparator
comp
to
c
.
Parameters
| c | - | a comparator to assign |
std::flat_map<Key,T,Compare,KeyContainer,MappedContainer>::value_compare:: operator()
|
bool
operator
(
)
(
const
const_reference
&
lhs,
const
const_reference
&
rhs
)
const
;
|
||
Compares
lhs.
first
and
rhs.
first
by calling the stored comparator
comp
.
Parameters
| lhs, rhs | - | values to compare |
Return value
comp ( lhs. first , rhs. first )
Exceptions
May throw implementation-defined exceptions.