CVSROOT: /sources/m4
Module name: m4
Branch: branch-1_4
Changes by: Eric Blake <ericb> 07/10/02 22:05:53
Index: doc/m4.texinfo
===================================================================
RCS file: /sources/m4/m4/doc/m4.texinfo,v
retrieving revision 1.1.1.1.2.135
retrieving revision 1.1.1.1.2.136
diff -u -b -r1.1.1.1.2.135 -r1.1.1.1.2.136
--- doc/m4.texinfo 10 Aug 2007 15:13:02 -0000 1.1.1.1.2.135
+++ doc/m4.texinfo 2 Oct 2007 22:05:52 -0000 1.1.1.1.2.136
@@ -4610,12 +4610,17 @@
@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: too few arguments to builtin `index'
@result{}0
+index(`abc', `')
[EMAIL PROTECTED]
+index(`abc', `b')
[EMAIL PROTECTED]
@end example
@node Regexp
@@ -4688,12 +4693,17 @@
@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: too few arguments to builtin `regexp'
@result{}0
+regexp(`abc', `')
[EMAIL PROTECTED]
+regexp(`abc', `', `def')
[EMAIL PROTECTED]
@end example
@node Substr
@@ -4904,12 +4914,17 @@
@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: too few arguments to builtin `patsubst'
@result{}abc
+patsubst(`abc', `')
[EMAIL PROTECTED]
+patsubst(`abc', `', `-')
[EMAIL PROTECTED]
@end example
@node Format
