is-scalar-class.md

description	title	ms.date	f1_keywords	helpviewer_keywords	ms.assetid
Learn more about: is_scalar Class	is_scalar Class	11/04/2016	type_traits/std::is_scalar	is_scalar class is_scalar	a0cdfc9a-f27e-4808-890f-6ed7942db60c

is_scalar Class

Tests if type is scalar.

Syntax

template <class Ty>
struct is_scalar;

Parameters

Ty
The type to query.

Remarks

An instance of the type predicate holds true if the type Ty is an integral type, a floating point type, an enumeration type, a pointer type, or a pointer to member type, or a cv-qualified form of one of them, otherwise it holds false.

Example

// std__type_traits__is_scalar.cpp
// compile with: /EHsc
#include <type_traits>
#include <iostream>

struct trivial
    {
    int val;
    };

int main()
    {
    std::cout << "is_scalar<trivial> == " << std::boolalpha
        << std::is_scalar<trivial>::value << std::endl;
    std::cout << "is_scalar<trivial *> == " << std::boolalpha
        << std::is_scalar<trivial *>::value << std::endl;
    std::cout << "is_scalar<int> == " << std::boolalpha
        << std::is_scalar<int>::value << std::endl;
    std::cout << "is_scalar<float> == " << std::boolalpha
        << std::is_scalar<float>::value << std::endl;

    return (0);
    }

is_scalar<trivial> == false
is_scalar<trivial *> == true
is_scalar<int> == true
is_scalar<float> == true

Requirements

Header: <type_traits>

Namespace: std

See also

<type_traits>
is_compound Class