MSVC++ std::clamp

algorithm.cpp

#if _HAS_CXX17
		// FUNCTION TEMPLATE clamp
template<class _Ty,
	class _Pr>
	constexpr const _Ty& clamp(const _Ty& _Val, const _Ty& _Min_val,
		const _Ty& _Max_val, _Pr _Pred)
	{	// returns _Val constrained to [_Min_val, _Max_val] ordered by _Pred
#if _ITERATOR_DEBUG_LEVEL == 2
	return (_DEBUG_LT_PRED(_Pred, _Max_val, _Min_val)
		? (_DEBUG_ERROR("invalid bounds arguments passed to std::clamp"), _Val)
		: _DEBUG_LT_PRED(_Pred, _Max_val, _Val)
			? _Max_val
			: _DEBUG_LT_PRED(_Pred, _Val, _Min_val)
				? _Min_val
				: _Val);
#else /* ^^^ _ITERATOR_DEBUG_LEVEL == 2 ^^^ // vvv _ITERATOR_DEBUG_LEVEL != 2 vvv */
	return (_Pred(_Max_val, _Val)
		? _Max_val
		: _Pred(_Val, _Min_val)
			? _Min_val
			: _Val);
#endif /* _ITERATOR_DEBUG_LEVEL == 2 */
	}

template<class _Ty>
	constexpr const _Ty& clamp(const _Ty& _Val, const _Ty& _Min_val,
		const _Ty& _Max_val)
	{	// returns _Val constrained to [_Min_val, _Max_val]
	return (_STD clamp(_Val, _Min_val, _Max_val, less<>()));
	}
#endif /* _HAS_CXX17 */