libstdc++
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Primary class template _Map_base.
If the hashtable has a value type of the form pair<T1, T2> and a key extraction policy (_ExtractKey) that returns the first part of the pair, the hashtable gets a mapped_type typedef. If it satisfies those criteria and also has unique keys, then it also gets an operator[].
Definition at line 527 of file hashtable_policy.h.