1 dnl @ ../doc/m4.texi:7784: Origin of test
2 dnl @ expected status: 0
4 dnl @ Copyright (C) 2006, 2007, 2008, 2009 Free Software
6 dnl @ This file is free software; the Free Software Foundation
7 dnl @ gives unlimited permission to copy and/or distribute it
8 dnl @ with or without modifications, as long as this notice
10 undivert(`forloop2.m4')dnl
11 dnl @result{}divert(`-1')
12 dnl @result{}# forloop(var, from, to, stmt) - improved version:
13 dnl @result{}# works even if VAR is not a strict macro name
14 dnl @result{}# performs sanity check that FROM is larger than TO
15 dnl @result{}# allows complex numerical expressions in TO and FROM
16 dnl @result{}define(`forloop', `ifelse(eval(`($2) <= ($3)'), `1',
17 dnl @result{} `pushdef(`$1')_$0(`$1', eval(`$2'),
18 dnl @result{} eval(`$3'), `$4')popdef(`$1')')')
19 dnl @result{}define(`_forloop',
20 dnl @result{} `define(`$1', `$2')$4`'ifelse(`$2', `$3', `',
21 dnl @result{} `$0(`$1', incr(`$2'), `$3', `$4')')')
22 dnl @result{}divert`'dnl
23 include(`forloop2.m4')
25 forloop(`i', `2', `1', `no iteration occurs')
27 forloop(`', `1', `2', ` odd iterator name')
28 dnl @result{} odd iterator name odd iterator name
29 forloop(`i', `5 + 5', `0xc', ` 0x`'eval(i, `16')')
30 dnl @result{} 0xa 0xb 0xc
31 forloop(`i', `a', `b', `non-numeric bounds')
32 dnl @error{}m4:stdin:6: bad expression in eval (bad input): (a) <= (b)