Specifies that an instance of the type can be copy-constructed from an lvalue expression.
The type T
satisfies CopyConstructible
if.
T
satisfies MoveConstructible
, and Given.
v
, an lvalue expression of type T
or const T
or an rvalue expression of type const T
u
, an arbitrary identifier The following expressions must be valid and have their specified effects.
Expression | Post-conditions |
---|---|
T u = v; | The value of u is equivalent to the value of v . The value of |
T(v) | The value of T(v) is equivalent to the value of v . The value of |
The expression | (until C++11) |
Until C++11, classes that overloaded operator&
were not CopyConstructible
and thus weren't usable in the standard library containers. As of C++11, the standard library uses std::addressof
whenever the address of an object is needed.
(C++11)(C++11)(C++11) | checks if a type has a copy constructor (class template) |
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