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Changes to m4/doc/m4.texinfo,v
From: |
Eric Blake |
Subject: |
Changes to m4/doc/m4.texinfo,v |
Date: |
Mon, 01 Oct 2007 22:44:01 +0000 |
CVSROOT: /sources/m4
Module name: m4
Changes by: Eric Blake <ericb> 07/10/01 22:44:00
Index: doc/m4.texinfo
===================================================================
RCS file: /sources/m4/m4/doc/m4.texinfo,v
retrieving revision 1.111
retrieving revision 1.112
diff -u -b -r1.111 -r1.112
--- doc/m4.texinfo 7 Sep 2007 22:37:46 -0000 1.111
+++ doc/m4.texinfo 1 Oct 2007 22:44:00 -0000 1.112
@@ -5749,12 +5749,17 @@
@result{}-1
@end example
-Omitting @var{substring} evokes a warning, but still produces output.
+Omitting @var{substring} evokes a warning, but still produces output;
+contrast this with an empty @var{substring}.
@example
index(`abc')
@error{}m4:stdin:1: Warning: index: too few arguments: 1 < 2
@result{}0
+index(`abc', `')
address@hidden
+index(`abc', `b')
address@hidden
@end example
@node Regexp
@@ -5822,12 +5827,17 @@
@result{}c
@end example
-Omitting @var{regexp} evokes a warning, but still produces output.
+Omitting @var{regexp} evokes a warning, but still produces output;
+contrast this with an empty @var{regexp} argument.
@example
regexp(`abc')
@error{}m4:stdin:1: Warning: regexp: too few arguments: 1 < 2
@result{}0
+regexp(`abc', `')
address@hidden
+regexp(`abc', `', `def')
address@hidden
@end example
If @var{resyntax} is given, @var{regexp} must be given according to
@@ -6078,12 +6088,17 @@
@result{}bab
@end example
-Omitting @var{regexp} evokes a warning, but still produces output.
+Omitting @var{regexp} evokes a warning, but still produces output;
+contrast this with an empty @var{regexp} argument.
@example
patsubst(`abc')
@error{}m4:stdin:1: Warning: patsubst: too few arguments: 1 < 2
@result{}abc
+patsubst(`abc', `')
address@hidden
+patsubst(`abc', `', `-')
address@hidden
@end example
@node Format
- Changes to m4/doc/m4.texinfo,v,
Eric Blake <=