<type_traits>

class template
<type_traits>

std::is_trivially_destructible

template <class T> struct is_trivially_destructible;
Is trivially destructible

Trait class that identifies whether T is a trivially destructible type.

Trivially destructible types include scalar types, trivially copy constructible classes and arrays of such types.

A trivially destructible class is a class (defined with class, struct or union) that:
  • uses the implicitly defined destructor.
  • the destructor is not virtual.
  • its base class and non-static data members (if any) are themselves also trivially destructible types.

The is_trivially_destructible class inherits from integral_constant as being either true_type or false_type, depending on whether T is trivially destructible.

Template parameters

T
A complete type, or void (possible cv-qualified), or an array of unknown bound.

Member types

Inherited from integral_constant:
member typedefinition
value_typebool
typeeither true_type or false_type

Member constants

Inherited from integral_constant:
member constantdefinition
valueeither true or false

Member functions

Inherited from integral_constant:

Example

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

struct A { };
struct B { ~B(){} };

int main() {
  std::cout << std::boolalpha;
  std::cout << "is_trivially_destructible:" << std::endl;
  std::cout << "int: " << std::is_trivially_destructible<int>::value << std::endl;
  std::cout << "A: " << std::is_trivially_destructible<A>::value << std::endl;
  std::cout << "B: " << std::is_trivially_destructible<B>::value << std::endl;
  return 0;
}

Output:
is_trivially_destructible:
int: true
A: true
B: false


See also