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| author | Eric Blake <ebb9@byu.net> | 2009-01-06 22:03:27 -0700 |
|---|---|---|
| committer | Eric Blake <ebb9@byu.net> | 2009-01-07 14:11:08 -0700 |
| commit | ae9dfa87a514d290fe349710a9f643d52856f4ba (patch) | |
| tree | 56561d37876dd6b774b9ce07e608c3df436a9093 /NEWS | |
| parent | e6819ca240b76700f07c31ba157f7795caada02e (diff) | |
| download | m4-ae9dfa87a514d290fe349710a9f643d52856f4ba.tar.gz | |
Enhance substr to support negative values.
* doc/m4.texinfo (Substr): Document new semantics, and how to
simulate old.
* modules/m4.c (substr): Support negative values.
* NEWS: Document this.
Signed-off-by: Eric Blake <ebb9@byu.net>
(cherry picked from commit e9e4abba45f7e9f368cf497e14bc2ce64b867a02)
Diffstat (limited to 'NEWS')
| -rw-r--r-- | NEWS | 9 |
1 files changed, 7 insertions, 2 deletions
@@ -1,6 +1,6 @@ GNU m4 NEWS - History of user-visible changes. -*- outline -*- -Copyright (C) 1992, 1993, 1994, 1998, 2000, 2001, 2006, 2007, 2008 Free -Software Foundation, Inc. +Copyright (C) 1992, 1993, 1994, 1998, 2000, 2001, 2006, 2007, 2008, 2009 +Free Software Foundation, Inc. * Noteworthy changes in Version 1.9b (200x-??-??) [beta] Released by ????, based on git version 1.9a-* @@ -242,6 +242,11 @@ promoted to 2.0. the current expansion is nested within argument collection of another macro. It has also been optimized for faster performance. +** The `substr' builtin now treats negative arguments as indices relative + to the end of the string. The manual gives an + example of how to recover M4 1.4.x behavior, as well as an example of + simulating the new negative argument semantics with older M4. + ** The `-d'/`--debug' command-line option now understands `-' and `+' modifiers, the way the builtin `debugmode' has always done; this allows `-d-V' to disable prior debug settings from the command line, similar to |