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std::uses_allocator<std::queue>

From cppreference.com
template< class T, class Container, class Alloc >

struct uses_allocator<queue<T,Container>,Alloc> :

    std::uses_allocator<Container, Alloc>::type { };
(since C++11)

Provides a transparent specialization of the std::uses_allocator type trait for std::queue: the container adaptor uses allocator if and only if the underlying container does.

[edit] See also

checks if the specified type supports uses-allocator construction
(class template) [edit]