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Re: too many warnings from Bison CVS for Pike


From: Hans Aberg
Subject: Re: too many warnings from Bison CVS for Pike
Date: Sat, 25 Feb 2006 07:05:45 +0100


On 24 Feb 2006, at 22:24, Akim Demaille wrote:


Le 23 févr. 06 à 21:34, Hans Aberg a écrit :

In summary, if one does not need a dynamic polymorphic variable in the extra-parser computations, then a discriminating union will be useful. But it does not serve as a replacement in the case a dynamic polymorphic variable is needed.

There is no problem with storing a polymorphic pointer in a
variant.

The idea is to use the traditional C++ virtual hierarchy. This is the model that was introduced into C++ as an extension of the corresponding one in C.

I fail to see the point of your comment.

You probably need to learn this C++ programing first, then.

  Hans Aberg






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