[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Unquoted special characters in regexps
From: |
martin rudalics |
Subject: |
Re: Unquoted special characters in regexps |
Date: |
Sun, 26 Feb 2006 20:26:09 +0100 |
User-agent: |
Mozilla Thunderbird 1.0 (Windows/20041206) |
> You are confusing validity with meeting stylistic guidelines. The
> fact that string-match returns 0 instead of throwing an error shows
> that the regexps are valid. "*", "." and so on are valid regexps too,
> even though they violate stylistic guidelines. "[" is _not_ a valid
> regexp.
>
> You can change stylistic guidelines by making doc changes. You can
> only change what is valid by making code changes.
A stylistic guideline can tell me to write comments or documentation
strings in a particular way in order to improve their readability. Even
if I don't follow the guidelines I'm confident that a future Elisp
interpreter will still execute my program correctly.
Validity of a regular expression is something more serious though. If
someone decides one day that "*" is no more a regular expression the
interpreter should accept I have to rewrite my program. And I couldn't
possibly complain - I've been warned.
You are confusing "validity" based on the implementation of a particular
interpreter with validity based on mathematical reasoning.
- Re: Unquoted special characters in regexps, (continued)
- Message not available
- Re: Unquoted special characters in regexps, martin rudalics, 2006/02/26
- Re: Unquoted special characters in regexps, Andreas Schwab, 2006/02/26
- Re: Unquoted special characters in regexps, martin rudalics, 2006/02/26
- Re: Unquoted special characters in regexps, Andreas Schwab, 2006/02/26
- Re: Unquoted special characters in regexps, martin rudalics, 2006/02/26
- Message not available
- Message not available
- Message not available
- Message not available
- Message not available
- Message not available
- Re: Unquoted special characters in regexps, martin rudalics, 2006/02/28
- Message not available
- Re: Unquoted special characters in regexps, martin rudalics, 2006/02/26
- Message not available
- Re: Unquoted special characters in regexps, martin rudalics, 2006/02/26
- Message not available
- Re: Unquoted special characters in regexps,
martin rudalics <=
- Message not available
- Re: Unquoted special characters in regexps, martin rudalics, 2006/02/26
- Message not available
- Re: Unquoted special characters in regexps, martin rudalics, 2006/02/26
- Message not available
- Re: Unquoted special characters in regexps, martin rudalics, 2006/02/26