1dnl $FreeBSD: src/tools/regression/usr.bin/m4/patterns.m4,v 1.2 2012/11/17 01:53:59 svnexp Exp $
2dnl $OpenBSD: src/regress/usr.bin/m4/patterns.m4,v 1.4 2003/06/08 20:11:45 espie Exp $
3patsubst(`quote s in string', `(s)', `\\\1')
4patsubst(`check whether subst
5over several lines
6works as expected', `^', `>>>')
7patsubst(`# This is a line to zap
8# and a second line
9keep this one', `^ *#.*
10')
11dnl Special case: empty regexp
12patsubst(`empty regexp',`',`a ')
13