copy constructor basic

[kathy]

For class:

class Foo
{
public:
Foo();
Foo(Foo const&)=delete;
Foo& operator =(Foo const&)=delete;
}

What "=delete" means?

 

[Juha Nieminen]

For class:

class Foo
{
public:
Foo();
Foo(Foo const&)=delete;
Foo& operator =(Foo const&)=delete;
}

What "=delete" means?

WIYF.

http://en.wikipedia.org/wiki/C++0x#Explicitly-defaulted_and_deleted_special_member_functions

 

[Saeed Amrollahi]

For class:

class Foo
{
public:
    Foo();
    Foo(Foo const&)=delete;
    Foo& operator =(Foo const&)=delete;

}

What "=delete" means?

Hi Kathy

It's new feature of C++0x called deleted functions. For example
in C++03 if you want to prohibit the copy operations, i.e nobody
can't to copy an object or assign to, you have to declare
these special member functions private:
class Foo {
private:
Foo(const Foo&);
Foo& operator=(const Foo&);
};

Now you can say more explicit using delete keyword.
Closely related to deleted functions are defaulted functions.
class Foo {
Foo() = default;
};
It means, you accepted the default behavior of default
constructor which compiler generates for you.
Such thing is somehow more elaboration.

HTH,
-- Saeed Amrollahi