is_scalar Class

Tests if type is scalar.

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_tr1__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

Reference

<type_traits>

is_compound Class