25 Algorithms library [algorithms]

25.11 Specialized <memory> algorithms [specialized.algorithms]

25.11.7 construct_at [specialized.construct]

template<class T, class... Args>
  constexpr T* construct_at(T* location, Args&&... args);

namespace ranges {
  template<class T, class... Args>
    constexpr T* construct_at(T* location, Args&&... args);
}

Constraints: The expression ::new (declval<void*>()) T(declval<Args>()...) is well-formed when treated as an unevaluated operand.

Effects: Equivalent to:

return ::new (voidify(*location)) T(std::forward<Args>(args)...);