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class template

<type_traits>

std::is_nothrow_move_constructible

template <class T> struct is_nothrow_move_constructible;

Is move constructible throwing no exceptions


Trait class that identifies whether T is a move constructible type, and such construction is known not to throw any exception.

This class inherits from integral_constant as being either true_type or false_type.


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:
operator bool
Returns value (public member function)

Example

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

struct A { };
struct B { B(B&&){} };
struct C { C(C&&) noexcept {} };

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

Output:
is_nothrow_move_constructible:
int: true
A: true
B: false
C: true


See also

is_move_constructible
Is move constructible (class template)
is_nothrow_constructible
Is constructible throwing no exceptions (class template)
is_nothrow_default_constructible
Is default constructible throwing no exceptions (class template)
is_nothrow_copy_constructible
Is copy constructible throwing no exceptions (class template)