std::is_integral

template <class T> struct is_integral;

Is integral

integral_constant
is_integral

Trait class that identifies whether T is an integral type.

It inherits from integral_constant as being either true_type or false_type, depending on whether T is an integral type:

fundamental integral types
`bool`
`char`
`char16_t`
`char32_t`
`wchar_t`
`signed char`
`short int`
`int`
`long int`
`long long int`
`unsigned char`
`unsigned short int`
`unsigned int`
`unsigned long int`
`unsigned long long int`

All fundamental integral types, along with all their aliases (like those in cstdint), are considered integral types by this class, including their const and volatile qualified variants.

Enums are not considered integral types in C++ (see is_enum).

Template parameters

T: A type.

Member types

Inherited from integral_constant:

member type	definition
`value_type`	`bool`
`type`	either true_type or false_type

Member constants

Inherited from integral_constant:

member constant	definition
`value`	either `true` or `false`

Member functions

Inherited from integral_constant:

operator bool: Returns value (public member function )

Example

// is_integral example
#include <iostream>
#include <type_traits>

int main() {
  std::cout << std::boolalpha;
  std::cout << "is_integral:" << std::endl;
  std::cout << "char: " << std::is_integral<char>::value << std::endl;
  std::cout << "int: " << std::is_integral<int>::value << std::endl;
  std::cout << "float: " << std::is_integral<float>::value << std::endl;
  return 0;
}

Output:

is_integral:
char: true
int: true
float: false

std::is_integral

Template parameters

Member types

Member constants

Member functions

Example

See also

C++

Reference

C library:

Containers:

Input/Output:

Multi-threading:

Other:

<type_traits>

helper classes:

type traits:

type transformations: