None¶

#include <m3ta/none>

Checks if none of the values evaluate to true.

Functions¶

m3ta::none

template<typename ... T_Values>
constexpr bool
none(T_Values ... values) noexcept

Template Parameters:
	T_Values (automatically deduced) — Types of the values to check.
Function Parameters:
	values – Variable number of values to check. Those can be of heterogeneous types.

Returns

Whether none of the values evaluate to true.

Traits¶

m3ta::None

template<typename T, T ... T_values>
struct None

Template Parameters:
	T – Type of the values to check. T_values – Variable number of values to check.

Member Types

type: The type std::integral_constant<bool, value> where value is the result of the function m3ta::none().

value_type: The type bool.

Member Constants

static constexpr bool value: Whether none of the values evaluate to true.

Aliases¶

m3ta::NoneT

template<typename T, T ... T_values>
using NoneT = typename None<T, T_values ...>::type;

Usage Examples¶

bool value1 = m3ta::none(true, true); // false
bool value2 = m3ta::none(false, false); // true
bool value3 = m3ta::none(true, false); // false
bool value4 = m3ta::none(true, 1, 2L, 4.0f, 9.0, 85.0L); // false

using Type1 = m3ta::NoneT<bool, true, true>; // std::integral_constant<bool, false>
using Type2 = m3ta::NoneT<bool, false, false>; // std::integral_constant<bool, true>
using Type3 = m3ta::NoneT<bool, true, false>; // std::integral_constant<bool, false>
using Type4 = m3ta::NoneT<bool, 1, 2, 4, 9, 85>; // std::integral_constant<bool, false>