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Re: Guile BUG: What's wrong with this?
From: |
Mark H Weaver |
Subject: |
Re: Guile BUG: What's wrong with this? |
Date: |
Sat, 07 Jan 2012 09:35:46 -0500 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.0.92 (gnu/linux) |
I wrote:
> 3. Make scm_nullstr into a mutable string. After all, it can't be
> changed anyway, and the _only_ reference to it is from
> scm_from_stringn, so the result should always be mutable.
For the record: my statement above was in error; scm_nullstr is actually
used in several files. However, I looked at each use, and in all cases
a mutable string is appropriate. Also, it is SCM_INTERNAL. So I
committed the change.
However, I wonder if we should also remove this optimization from
scm_from_stringn, as Bruce suggested. The R5RS says that `string' and
`make-string' should return "a newly allocated string", which implies
that the new string should not be `eq?' to any existing object.
Although our docs for scm_from_stringn et al do not explicitly specify
that the string is newly allocated, an argument could be made that we
should follow the behavior of `string'.
What do other people think?
Mark
- Re: Guile BUG: What's wrong with this?, (continued)
- Re: Guile BUG: What's wrong with this?, Mark H Weaver, 2012/01/07
- Re: Guile BUG: What's wrong with this?, Bruce Korb, 2012/01/07
- Re: Guile BUG: What's wrong with this?, Mark H Weaver, 2012/01/07
- Re: Guile BUG: What's wrong with this?, Bruce Korb, 2012/01/07
- Re: Guile BUG: What's wrong with this?, Mark H Weaver, 2012/01/09
- Re: Guile BUG: What's wrong with this?, Bruce Korb, 2012/01/09
- Re: Guile BUG: What's wrong with this?, Andy Wingo, 2012/01/09
- Re: Guile BUG: What's wrong with this?, Bruce Korb, 2012/01/09
- Re: Guile BUG: What's wrong with this?, David Kastrup, 2012/01/07
- Re: Guile BUG: What's wrong with this?, Mark H Weaver, 2012/01/07
- Re: Guile BUG: What's wrong with this?,
Mark H Weaver <=
- Re: Guile BUG: What's wrong with this?, Mike Gran, 2012/01/07
- Re: Guile BUG: What's wrong with this?, Ludovic Courtès, 2012/01/07
- The empty string and other empty strings, Ludovic Courtès, 2012/01/10
- Re: The empty string and other empty strings, Mike Gran, 2012/01/10
- Re: The empty string and other empty strings, Mark H Weaver, 2012/01/10
- Re: The empty string and other empty strings, Mike Gran, 2012/01/10
- Re: The empty string and other empty strings, Mark H Weaver, 2012/01/10
- Re: The empty string and other empty strings, David Kastrup, 2012/01/10
- Re: The empty string and other empty strings, Mark H Weaver, 2012/01/10
- Re: The empty string and other empty strings, Ludovic Courtès, 2012/01/12