Strange warnings

[Ryszard Kabatek <rysio@rumcajs.chemie.uni-halle.de>]

In the sample below the class X should have a standard constructor
generated by the compiler. But I get the following warnings:

# eg++ x.cc
x.cc:6: warning: `class X' only defines private constructors and has no
friends
x.cc: In function `static class X * X::create()':
x.cc:5: no matching function for call to `X::X ()'
x.cc:3: candidates are: X::X(const X &)


The first warning I get too if I define a private standard constructor.
But there is a static function, that creates new instances of X,
class X does not need friend functions or classes.


# cat x.cc

class X {
    X(const X&);
  public:
    static X* create() {return new X();}
};

int main(int argc, char* argv)
{
  X* p = X::create();
  delete p;
}


Ryszard Kabatek
Martin-Luther University Halle-Wittenberg, Department of Physical Chemistry
Geusaer Str. 88, 06217 Merseburg, Germany
Tel. +49 3461 46 2487 Fax. +49 3461 46 2129