NAME¶

std::flat_map::value_compare - std::flat_map::value_compare

Synopsis¶

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 constructs value_compare object
(private) (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: (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)

Exceptions¶

May throw implementation-defined exceptions.