Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!apple!bloom-beacon!bu-cs!att!ulysses!andante!alice!ark
From: ark@alice.UUCP (Andrew Koenig)
Newsgroups: comp.lang.c++
Subject: Re: abstract class constructor pitfall
Message-ID: <9543@alice.UUCP>
Date: 29 Jun 89 05:02:06 GMT
References: <DOVE.89Jun6233905@rocket.UUCP>
Distribution: comp
Organization: AT&T Bell Laboratories, Liberty Corner NJ
Lines: 16

In article <DOVE.89Jun6233905@rocket.UUCP>, dove@rocket.UUCP (Webster Dove) writes:
> The constructor a::a() is booby trapped.  Since the virtual mechanism
> does not work during construction, the attempted call to foo() is
> undefined.

	class a
	{
	public: 
	  virtual void foo() = 0;
	  a() { foo(); }
	};

C++ 2.0 is kind enough to give an error message here.
-- 
				--Andrew Koenig
				  ark@europa.att.com