std::alloca...::construct(3) C++ Standard Libary std::alloca...::construct(3) NAME std::allocator_traits::construct - std::allocator_traits::construct Synopsis Defined in header <memory> template< class T, class... Args > (since C++11) static void construct( Alloc& a, T* p, Args&&... args ); (un- til C++20) template< class T, class... Args > (since C++20) static constexpr void construct( Alloc& a, T* p, Args&&... args ); If possible, constructs an object of type T in allocated uninitialized storage pointed to by p, by calling a.construct(p, std::forward<Args>(args)...). If the above is not possible (e.g. Alloc does not have the member func- tion construct()), then calls ::new (static_cast<void*>(p)) T(std::forward<Args>(args)...) (until C++20) std::construct_at(p, std::forward<Args>(args)...) (since C++20) Parameters a - allocator to use for construction p - pointer to the uninitialized storage on which a T object will be constructed the constructor arguments to pass to a.construct() or to placement-new args... - (until C++20) std::construct_at() (since C++20) Return value (none) Notes This function is used by the standard library containers when inserting, copying, or moving elements. Because this function provides the automatic fall back to placement new, the member function construct() is an optional Allocator requirement since C++11. See also operator new allocation functions operator new[] (function) construct constructs an object in allocated storage (until C++20) (public member function of std::allocator<T>) construct_at creates an object at a given address (C++20) (function template) http://cppreference.com 2024.06.10 std::alloca...::construct(3)
NAME | Synopsis | Parameters | Return value | Notes | See also
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