std::flat_multimap<Key,T,Compare,KeyContainer,MappedContainer>::value_compare

 

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std::flat_multimap

Member types

Member functions

flat_multimap::flat_multimap    flat_multimap::operator= Modifiers flat_multimap::clear flat_multimap::erase flat_multimap::swap flat_multimap::extract flat_multimap::replace flat_multimap::insert flat_multimap::insert_range flat_multimap::emplace flat_multimap::emplace_hint Lookup flat_multimap::count flat_multimap::find flat_multimap::contains flat_multimap::equal_range flat_multimap::lower_bound flat_multimap::upper_bound Iterators flat_multimap::beginflat_multimap::cbegin flat_multimap::endflat_multimap::cend flat_multimap::rbeginflat_multimap::crbegin flat_multimap::rendflat_multimap::crend Capacity flat_multimap::size flat_multimap::max_size flat_multimap::empty Observers flat_multimap::key_comp flat_multimap::keys flat_multimap::value_comp flat_multimap::values

Non-member functions

swap(std::flat_multimap) erase_if(std::flat_multimap)     operator==operator<=>

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uses_allocator<std::flat_multimap>

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sorted_equivalent          sorted_equivalent_t

Deduction guides

 

class value_compare;		(since C++23)

std::flat_multimap::value_compare is a function object that compares objects of type std::flat_multimap::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_multimap::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_multimap<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_multimap<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.