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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 ); (until 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 uninitial- ized 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 function 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 in- serting, 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 2022.07.31 std::alloca...::construct(3)
NAME | Synopsis | Parameters | Return value | Notes | See also
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