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Re: Using empty_string as the only "" string

From: Andreas Schwab
Subject: Re: Using empty_string as the only "" string
Date: Wed, 25 Apr 2007 00:35:35 +0200
User-agent: Gnus/5.110006 (No Gnus v0.6) Emacs/22.0.97 (gnu/linux)

David Kastrup <address@hidden> writes:

> Aren't grounded at all.  (concat "a" "b") does not make "b" part of
> the result.  So (concat "a" "") and (concat "b" "") would not share
> the same "" even if one replaced both of them by the same object.
> Every created string is a separate object not containing any other
> string as a part.  The same is not true for lists.  You can, for
> example, modify a sublist and in the process change the list
> containing it.
> This does not happen for substrings.

Since you can't modify the empty string there is no contradiction.


Andreas Schwab, SuSE Labs, address@hidden
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
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