c++/3601: GCC 3.0 barfs on overloaded operator==

[lerdsuwa@gcc.gnu.org]

Synopsis: GCC 3.0 barfs on overloaded operator==

State-Changed-From-To: open->closed
State-Changed-By: lerdsuwa
State-Changed-When: Sat Jul  7 06:19:33 2001
State-Changed-Why:
    Not a bug.  According to the standard Sectio 4.10 (Pointer
    conversions) paragraph 1:
      A null pointer constant is an integral constant expression
      (5.19) rvalue of integer type that evaluates to zero.  A
      null pointer constant can be converted to a pointer type;
      the result is the null pointer value of that type and is
      is distinguishable from every other value of pointer to
      object or pointer to function type. ...
    
    Here 0 is "null pointer constant" and has to be converted
    to "null pointer value" of type "void *".

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