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bug#2203: C Mode: C-M-a fails at BOD re_comp, src/regex.c L6534
From: |
Alan J Third |
Subject: |
bug#2203: C Mode: C-M-a fails at BOD re_comp, src/regex.c L6534 |
Date: |
Fri, 15 Jan 2016 20:40:31 +0000 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.5 (darwin) |
Alan Mackenzie <acm@muc.de> writes:
> In .../src/regex.c put point at BOL6534, "char *" here:
>
> }
> WEAK_ALIAS (__re_compile_pattern, re_compile_pattern)
> ^L
> /* Entry points compatible with 4.2 BSD regex library. We don't define
> them unless specifically requested. */
>
> #if defined _REGEX_RE_COMP || defined _LIBC
>
> /* BSD has one and only one pattern buffer. */
> static struct re_pattern_buffer re_comp_buf;
>
> char *
> <=================================
> # ifdef _LIBC
> /* Make these definitions weak in libc, so POSIX programs can redefine
> these names if they don't use our functions, and still use
> regcomp/regexec below without link errors. */
> weak_function
> # endif
> re_comp (s)
> const char *s;
> {
>
>
> Do C-M-a. Point doesn't move.
>
> Preliminary investigation: With point on the 'h' of "char *",
> (c-beginning-of-decl-1 nil) should move point one character backwards.
> Instead, it moves to BOL "WEAK_ALIAS".
I just tested this in Emacs 25 and it seems that in every case point
moves back to "WEAK_ALIAS". That is, C-M-a, c-beginning-of-defun,
behaves the same way as (c-beginning-of-decl-1 nil).
I guess that makes it more broken, if more consistent, than when the bug
was raised.
--
Alan Third
- bug#2203: C Mode: C-M-a fails at BOD re_comp, src/regex.c L6534,
Alan J Third <=