std::flat_map<Key,T,Compare,KeyContainer,MappedContainer>::value_compare
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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.
Contents
[edit] Member objects
Member name
Definition
comp (private)
the comparison function object of type std::flat_map::key_compare (exposition-only member object*)
[edit] Member functions
(constructor)
(private)
value_compare object (public member function)
operator()
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*)
value_compare( key_compare c );
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)
[edit] Exceptions
May throw implementation-defined exceptions.