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#pragma once
#include <concepts>
namespace NYT {
////////////////////////////////////////////////////////////////////////////////
namespace NDetail {
template <class T, class TSignature>
struct TIsInvocable;
template <class T, class TResult, bool NoExcept, class... TArgs>
struct TIsInvocable<T, TResult(TArgs...) noexcept(NoExcept)>
{
private:
static constexpr bool IsInvocable_ = requires (T&& t, TArgs&&... args) {
{ std::forward<T>(t)(std::forward<TArgs>(args)...) } -> std::same_as<TResult>;
};
static constexpr bool IsNoThrowInvocable_ = requires (T&& t, TArgs&&... args) {
{ std::forward<T>(t)(std::forward<TArgs>(args)...) } noexcept -> std::same_as<TResult>;
};
public:
static constexpr bool Value =
IsInvocable_ &&
(!NoExcept || IsNoThrowInvocable_);
};
} // namespace NDetail
////////////////////////////////////////////////////////////////////////////////
template <class TObject, class TScalar>
concept CScalable = requires (TObject object, TScalar scalar)
{
{ object * scalar } -> std::same_as<TObject>;
};
////////////////////////////////////////////////////////////////////////////////
template <class T, class TSignature>
concept CInvocable = NDetail::TIsInvocable<T, TSignature>::Value;
////////////////////////////////////////////////////////////////////////////////
} // namespace NYT
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