std::uses_allocator<std::priority_queue>

Since C++11

Header: <queue>

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

# Declarations

template< class T, class Container, class Compare, class Alloc >
struct uses_allocator<std::priority_queue<T, Compare, Container>, Alloc>
: std::uses_allocator<Container, Alloc>::type {};

(since C++11)

# Example

#include <memory>
#include <queue>
 
static_assert(
    std::uses_allocator<std::priority_queue<int>, void>::value == false &&
    std::uses_allocator<std::priority_queue<int>, std::allocator<int>>::value == true
);
 
int main() {}

# See also