Re: multiple inheritance ambiguity question

From:
Pete Becker <pete@versatilecoding.com>
Newsgroups:
comp.lang.c++
Date:
Thu, 01 Oct 2009 09:25:10 -0400
Message-ID:
<ArWdnarfTL0rMFnXnZ2dnUVZ_r1i4p2d@giganews.com>
PuzzledwithC++ wrote:

HI,

consider the code below

class base
{
public:
     void display()
     { }
};
class der1:public base
{
};
class der2:public base
{
};

class client :public der1,public der2
{
  public:
          void test()
          {
            //display();//ambigous call.Compilation error.
            base::display();//no compilation error.
           }
};
void main()
{
   client cl;
   cl.test();

}

So calling display() inside client::test() will give a valid
compilation error.
But when I call base::display(),the program runs fine.
My confusion is when I call base::display(),which base is being
recognized here?.Is it a base part from der1 or der2.?
I believe the call base::display() gets modified like
static_cast<der1*>(this)->base::display().


Compiler bug. base::display() is ambiguous, for the same reason that
display() is ambiguous.

--
   Pete
Roundhouse Consulting, Ltd. (www.versatilecoding.com) Author of
"The Standard C++ Library Extensions: a Tutorial and Reference"
(www.petebecker.com/tr1book)

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