std::ranges::construct_at
From cppreference.com
| Defined in header <memory>
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| Call signature |
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| template< class T, class... Args > constexpr T* construct_at( T* location, Args&&... args ); |
(since C++20) | |
Creates a T object initialized with the arguments in args at given address location.
Equivalent to
if constexpr (std::is_array_v<T>)
return ::new (voidify (*location)) T[1]();
else
return ::new (voidify (*location)) T(std::forward<Args>(args)...);
, except that construct_at may be used in evaluation of constant expressions(until C++26).
When construct_at is called in the evaluation of some constant expression expr, location must point to either a storage obtained by std::allocator<T>::allocate or an object whose lifetime began within the evaluation of expr.
This overload participates in overload resolution only if all following conditions are satisfied:
- std::is_unbounded_array_v<T> is false.
- ::new(