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From: laleak01@ulkyvx.bitnet
Newsgroups: comp.lang.c++
Subject: What good are method pointers?
Message-ID: <1991Jun30.024124.649@ulkyvx.bitnet>
Date: 30 Jun 91 06:41:24 GMT
Article-I.D.: ulkyvx.1991Jun30.024124.649
Organization: University of Louisville
Lines: 29


What can you do with pointers to methods?

Why does this fail?:

class Ack {
  public:
  void Func (void) { printf ("Ack.  Thppft.\n"); }
  };

void main (void)
  {
  Ack ack;
  void (Ack::*p) (void);

  p=Ack::Func; // no prob here
  ack.Func(); // string is output
#if 0
  p(); // this complains: "too few parms; need 'this'"
#else
  p(ack); // so I gave it a this.
#endif
  }

p(ack) produces NO output.  I would at least expect it to print "Ack..."

What can you really do with pointers to methods?

-- Arlie Davis, borrowing Linda's account.  (Do not email address.)