traits

Definition

Contains traits definitions.

Classes
struct	xtd::is_value_type< value_t, typename >
	Type trait that determines whether a type can be inserted into an std::ostream using the stream insertion operator (operator<<). More...
struct	xtd::is_value_type< xtd::value_type< value_t > >
	Specialization of is_value_type for types that support stream insertion into std::ostream. More...

Variables
template<typename value_t>
constexpr bool	xtd::is_value_type_v
	Convenience variable template equivalent to is_value_type_v<value_t>::value.

Variable Documentation

is_value_type_v

template<typename value_t>

bool xtd::is_value_type_v

inlineconstexpr

#include <is_value_type.hpp>

Convenience variable template equivalent to is_value_type_v<value_t>::value.

Definition

template<typename value_t>
inline constexpr bool is_value_type_v = is_value_type<xtd::raw_type<value_t>>::value;

Header

#include <xtd/is_value_type>

Namespace

xtd

Library

xtd.core

This helper allows simpler and more readable usage, especially in if constexpr expressions and static assertions.

Template Parameters

value_t

The type to test for stream insertability. static_assert(xtd::is_value_type_v<int>); static_assert(!xtd::is_value_type_v<std::vector<int>>);

See also

is_value_type