class template
<type_traits>
std::is_trivially_move_assignable
template <class T> struct is_trivially_move_assignable;
Is trivially move assignable
Trait class that identifies whether T is a trivially move assignable type.
The class inherits from integral_constant as being either true_type or false_type, depending on whether T is trivially move assignable.
Template parameters
- T
- A complete type, or void (possible cv-qualified), or an array of unknown bound.
Member constants
Inherited from integral_constant:
| member constant | definition |
|---|
| value | either true or false |
Example
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// is_trivially_move_assignable example
#include <iostream>
#include <type_traits>
struct A { };
struct B { B& operator= (A&&){return *this;} };
int main() {
std::cout << std::boolalpha;
std::cout << "is_trivially_move_assignable:" << std::endl;
std::cout << "int=short: " << std::is_trivially_move_assignable<int,short>::value << std::endl;
std::cout << "A=A: " << std::is_trivially_move_assignable<A,A>::value << std::endl;
std::cout << "B=A: " << std::is_trivially_move_assignable<B,A>::value << std::endl;
return 0;
}
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Output:
is_trivially_move_assignable:
int=short: true
A=A: true
B=A: false
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