std::uses_allocator<std::queue>
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                    |   template< class T, class Container, class Alloc > struct uses_allocator<queue<T,Container>,Alloc> :   | 
(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
|    (C++11)  | 
   checks if the specified type supports uses-allocator construction   (class template)  |