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 accessor result is not empty - releases the result.

If an element with the key equal to key exists - sets the result to provide access to this element.

Returns: true if an element with the key equal to key was found, false otherwise.

count

size_type count( const key_type& key ) const;

Returns: 1 if an element with the key equal to key exists, 0 otherwise.