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#pragma once
namespace asl {
template<typename T> using void_t = void;
template<typename T, typename = void>
inline constexpr bool is_referenceable = false;
template<typename T>
inline constexpr bool is_referenceable<T, void_t<T&>> = true;
namespace internal {
template<typename T, bool = is_referenceable<T>>
struct as_ref_helper { using lvalue = T; using rvalue = T; };
template<typename T>
struct as_ref_helper<T, true> { using lvalue = T&; using rvalue = T&&; };
template<typename T> struct un_ref_helper { using type = T; };
template<typename T> struct un_ref_helper<T&> { using type = T; };
template<typename T> struct un_ref_helper<T&&> { using type = T; };
} // namespace internal
template<typename T> using as_ref_t = internal::as_ref_helper<T>::lvalue;
template<typename T> using as_rref_t = internal::as_ref_helper<T>::rvalue;
template<typename T> using un_ref_t = internal::un_ref_helper<T>::type;
#define AslMove(expr_) (static_cast<::asl::as_rref_t<::asl::un_ref_t<decltype(expr_)>>>(expr_))
#define AslForward(expr_) (static_cast<::asl::as_rref_t<decltype(expr_)>>(expr_))
} // namespace asl
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