std::multimap<Key,T,Compare,Allocator>:: value_compare
|
class
value_compare
;
|
||
std::multimap::value_compare
is a function object that compares objects of type
std::multimap::value_type
(key-value pairs) by comparing of the first components of the pairs.
Member types
| Type | Definition |
result_type
(deprecated in C++17)
(removed in C++20)
|
bool |
first_argument_type
(deprecated in C++17)
(removed in C++20)
|
value_type
|
second_argument_type
(deprecated in C++17)
(removed in C++20)
|
value_type
|
|
These member types are obtained via publicly inheriting std:: binary_function < value_type, value_type, bool > . |
(until C++11) |
Protected member objects
|
Compare
comp
|
the stored comparator
(protected member object) |
Member functions
|
(constructor)
|
constructs a new
value_compare
object
(protected member function) |
|
operator()
|
compares two values of type
value_type
(public member function) |
std::multimap<Key,T,Compare,Alloc>::value_compare:: value_compare
|
protected
:
value_compare ( Compare c ) ; |
||
Initializes the internal instance of the comparator to c .
Parameters
| c | - | comparator to assign |
std::multimap<Key,T,Compare,Alloc>::value_compare:: operator()
|
bool
operator
(
)
(
const
value_type
&
lhs,
const
value_type
&
rhs
)
const
;
|
||
Compares lhs. first and rhs. first by calling the stored comparator.
Parameters
| lhs, rhs | - | values to compare |
Return value
comp ( lhs. first , rhs. first )
Exceptions
May throw implementation-defined exceptions.