std::is_assignable

Template parameters

T, U

Complete types, or void (possible cv-qualified), or an array of unknown bound.

Member types

Member constants

Member functions

operator bool

Returns value (public member function)

Example

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

struct A { };
struct B { B& operator= (const A&){return *this;} };

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

is_assignable:
A=B: false
B=A: true

See also

is_constructible

Is constructible (class template)

is_convertible

Is convertible (class template)

is_copy_assignable

Is copy assignable (class template)

is_move_assignable

Is move assignable (class template)

is_trivially_assignable

Is trivially assignable (class template)

is_nothrow_assignable

Is assignable throwing no exceptions (class template)