CopyAssignable

Specifies that an instance of the type can be copy-assigned from an lvalue expression.

Requirements

The type T satisfies CopyAssignable if

• The type T satisfies MoveAssignable, and

Given

• t, a modifiable lvalue expression of type T,
• v, an lvalue expression of type T or const T or an rvalue expression of type const T.

The following expressions must be valid and have their specified effects.

Expression	Return type	Return value	Post-conditions
t=v	T&	t	The value of t is equivalent to the value of v. The value of v is unchanged.

See also

std::is_copy_assignable

(since C++11)

std::is_trivially_copy_assignable

(since C++11)

std::is_nothrow_copy_assignable

(since C++11)

checks if a type has a copy assignment operator

(class template)

assignable_from

(since C++20)

specifies that an object of a type can be default constructed

(concept)