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std::allocator_traits::allocate

Defined in header <memory> 
static pointer allocate( Alloc& a, size_type n );
 (1) (since C++11) 
static pointer allocate( Alloc& a, size_type n, const_void_pointer hint );
 (2) (since C++11)

Uses the allocator a to allocate n*sizeof(Alloc::value_type) bytes of uninitialized storage.

1) Calls a.allocate(n)
2) Additionally passes memory locality hint hint. Calls a.allocate(n, hint) if possible. If not possible (e.g. a has no two-argument member function allocate()), calls a.allocate(n)

Parameters

a - allocator to use
n - the number of objects to allocate storage for
hint - pointer to a nearby memory location

Return value

The pointer returned by the call to a.allocate(n).

See also

allocates uninitialized storage
(public member function of std::allocator)

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