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RE: [gang-of-4-patterns] Benefits of the visitor pattern in Go4's example - I don't understand

From: "Chris Finlayson" <cfinlayson AT vls-inc.com>
To: <gang-of-4-patterns AT cs.uiuc.edu>
Subject: RE: [gang-of-4-patterns] Benefits of the visitor pattern in Go4's example - I don't understand
Date: Mon, 22 Mar 2004 15:10:08 -0700
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[snip[
why bother with the double-dispatch structure, is my fundamental
question, with this simple example? I'm not sure what you mean by "double-dispatch" structure.
[snip]

see p. 338 of GO4 - (not verbatim) - At the heart of the Visitor pattern is its ability to add operations to classes w/out changing them by using the double-dispatch technique (i.e. the accept/visit methods).

I was corrupting terminology, calling to attention the seemingly-over-complex model of solving the problem by adding accept/visit methods (the double-dispatch technique) where appropriate.

==Chris.

[gang-of-4-patterns] Benefits of the visitor pattern in Go4's example - I don't understand, Chris Finlayson, 03/19/2004
- Re: [gang-of-4-patterns] Benefits of the visitor pattern in Go4's example - I don't understand, oleg shteynbuk, 03/19/2004
  - Re: [gang-of-4-patterns] Benefits of the visitor pattern in Go4's example - I don't understand, David Rosenstrauch, 03/19/2004
- <Possible follow-up(s)>
- RE: [gang-of-4-patterns] Benefits of the visitor pattern in Go4's example - I don't understand, Chris Finlayson, 03/22/2004
- RE: [gang-of-4-patterns] Benefits of the visitor pattern in Go4's example - I don't understand, Chris Finlayson, 03/22/2004