Re: [Boost-users] noncopyable

4 Dec 2008

      2008/12/4 Hicham Mouline 
...
AFAIU, deriving from boost::noncopyable disables _accidental_ object
copying.
Is it possible to implement a clone() const member function of the object
to _explicitly_ get a copy of the object?
Perhaps deriving boost::noncopyable makes it totally impossible to ever
get a copy of an object without resorting to byte copy.
To avoid creating copies accidentally consider making copy constructor
explicit.

struct Foo {
  explicit Foo(const Foo&) {}
};

void Bar(Foo);

int main() {
  Foo foo;
  Bar(foo); // Error, implicit copy.
  Foo copy(foo); // OK, explicit copy.
}

Roman Perepelitsa.