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std::allocator::construct

Defined in header `<memory>`
void construct( pointer p, const_reference val );	(1)	(until C++11)
template< class U, class... Args > void construct( U* p, Args&&... args );	(2)	(since C++11)

Constructs an object of type T in allocated uninitialized storage pointed to by p, using placement-new.

1) Calls new((void *)p) T(val).

2) Calls ::new((void *)p) U(std::forward<Args>(args)...).

Parameters

p	-	pointer to allocated uninitialized storage
val	-	the value to use as the copy constructor argument
args...	-	the constructor arguments to use

Return value

(none).

See also

construct [static]	constructs an object in the allocated storage (function template)
operator newoperator new[]	allocation functions (function)

Links:

http://en.cppreference.com/w/cpp/memory/allocator/construct

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2016-10-11 10:00:13

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