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* libm4.m4 (m4_for): New macro.

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Akim Demaille 2000-02-08 08:41:52 +00:00
parent 9729954f66
commit 0cd449970f
2 changed files with 19 additions and 2 deletions
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ChangeLog
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@ -1,3 +1,7 @@
2000-02-08 Akim Demaille <akim@epita.fr>
* libm4.m4 (m4_for): New macro.
2000-02-07 Akim Demaille <akim@epita.fr>
Stay in Autoconf's name space.

17
libm4.m4
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@ -233,8 +233,21 @@ define(m4_match,
## --------------------- ##
# Implementing loops (`foreach' loops) in m4 is much more tricky than it
# may seem. Actually, the example of a `foreach' loop in the m4
# m4_for(VARIABLE, FROM, TO, EXPRESSION)
# --------------------------------------
# Expand EXPRESSION defining VARIABLE to FROM, FROM + 1, ..., TO.
# Both limits are included.
define([m4_for],
[pushdef([$1], [$2])_m4_for([$1], [$2], [$3], [$4])popdef([$1])])
define([_m4_for],
[$4[]ifelse($1, [$3], [],
[define([$1], incr($1))_m4_for([$1], [$2], [$3], [$4])])])
# Implementing `foreach' loops in m4 is much more tricky than it may
# seem. Actually, the example of a `foreach' loop in the m4
# documentation is wrong: it does not quote the arguments properly,
# which leads to undesired expansions.
#