move.h

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#pragma once
#include "utils/type_traits.h"
 
namespace bmb {
 
template <typename T>
[[nodiscard("Move should be used to initialize other object")]]
constexpr remove_ref_t<T>&& move(T&& value) noexcept {
    // Universal reference as a parameter allows to move already rvalue
    // expressions. Therefore returning type should remove reference from the
    // deduced type(see reference collapsing rules)
    return static_cast<remove_ref_t<T>&&>(value);
}
 
template <typename T>
[[nodiscard("Forward should be used to initialize other object")]]
constexpr T&& forward(remove_ref_t<T>& value) noexcept {
    return static_cast<T&&>(value);
}
 
template <typename T>
    requires(!is_lvalue_ref_v<T>)
[[nodiscard("Forward should be used to initialize other object")]]
constexpr T&& forward(remove_ref_t<T>&& value) noexcept {
    return static_cast<T&&>(value);
}
 
template <typename T>
void swap(T& x, T& y) {
    T tmp = move(x);
 
    x = move(y);
    y = move(tmp);
}
 
}  // namespace bmb