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divert(`-1')
# forloop(var, from, to, stmt) - improved version:
# works even if VAR is not a strict macro name
# performs sanity check that FROM is larger than TO
# allows complex numerical expressions in TO and FROM
define(`forloop', `ifelse(eval(`($2) <= ($3)'), `1',
`pushdef(`$1')_$0(`$1', eval(`$2'),
eval(`$3'), `$4')popdef(`$1')')')
define(`_forloop',
`define(`$1', `$2')$4`'ifelse(`$2', `$3', `',
`$0(`$1', incr(`$2'), `$3', `$4')')')
divert`'dnl
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