bsl::unordered_multiset::count

Synopses

Declared in <bslstl_unorderedmultiset.h>

Return the number of value_type objects within this unordered multiset that are equivalent to the specified key.

unordered_multiset<KEY, HASH, EQUAL, ALLOCATOR>::size_type
count(key_type const& key) const;

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Return the number of value_type objects within this unordered multiset that are equivalent to the specified key. The behavior is undefined unless key is equivalent to the elements of at most one equivalent-key group in this unordered multiset.

template<class LOOKUP_KEY>
size_type
count(LOOKUP_KEY const& key) const
requires BloombergLP::bslmf::IsTransparentPredicate<HASH, LOOKUP_KEY>::value
        && BloombergLP::bslmf::IsTransparentPredicate<EQUAL,LOOKUP_KEY>::value;

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