C++ named requirements: 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

is_copy_assignableis_trivially_copy_assignableis_nothrow_copy_assignable (C++11)(C++11)(C++11)	checks if a type has a copy assignment operator (class template)
assignable_from (C++20)	specifies that a type is assignable from another type (concept)