Lookup

All methods in this section can be executed concurrently with each other and concurrently-safe modifiers.

find

bool find( const_accessor& result, const key_type& key ) const;

bool find( accessor& result, const key_type& key );

If the result accessor is not empty, releases the result.

If an element with the key that is equivalent to key exists, sets the result to provide access to this element.

Returns: true if an element with the key equivalent to key is found; false otherwise.

---

template <typename K>
bool find( const_accessor& result, const K& key ) const;

template <typename K>
bool find( accessor& result, const K& key );

If the result accessor is not empty, releases the result.

If an element with the key that compares equivalent to the value key exists, sets the result to provide access to this element.

Returns: true if an element with the key that compares equivalent to the value key is found; false otherwise.

This overload only participates in the overload resolution if qualified-id hash_compare_type::is_transparent is valid and denotes a type.

count

size_type count( const key_type& key ) const;

Returns: 1 if an element with the key equivalent to key exists; 0 otherwise.

---

template <typename K>
size_type count( const K& key ) const;

Returns: 1 if an element with the key that compares equivalent to the value key exists; 0 otherwise.

This overload only participates in the overload resolution if qualified-id hash_compare_type::is_transparent is valid and denotes a type.