is_integral 클래스

아티클
06/09/2015

Tests if type is integral.

template<class Ty>
    struct is_integral;

매개 변수

Ty
The type to query.

설명

An instance of the type predicate holds true if the type Ty is one of the integral types, or a cv-qualified form of one of the integral types, otherwise it holds false.

An integral type is one of bool, char, unsigned char, signed char, wchar_t, short, unsigned short, int, unsigned int, long, and unsigned long. In addition, with compilers that provide them, an integral type can be one of long long, unsigned long long, __int64, and unsigned __int64.

예제

// std_tr1__type_traits__is_integral.cpp 
// compile with: /EHsc 
#include <type_traits> 
#include <iostream> 
 
struct trivial 
    { 
    int val; 
    }; 
 
int main() 
    { 
    std::cout << "is_integral<trivial> == " << std::boolalpha 
        << std::is_integral<trivial>::value << std::endl; 
    std::cout << "is_integral<int> == " << std::boolalpha 
        << std::is_integral<int>::value << std::endl; 
    std::cout << "is_integral<float> == " << std::boolalpha 
        << std::is_integral<float>::value << std::endl; 
 
    return (0); 
    }