From: Eric Blake <eblake@redhat.com>
Date: Tue, 21 Apr 2015 12:14:33 +0000 (-0600)
Subject: m4_set_foreach: minor optimization
X-Git-Tag: v2.69b~94
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7bc2c5623d2fed6421bf95279e5d610ed8dbaa50;p=thirdparty%2Fautoconf.git

m4_set_foreach: minor optimization

As a minor optimization, most macros in m4sugar.m4 try to avoid
output of 'dnl' in the expansion, to reduce the number of macros
that must be expanded at each call site.

* lib/m4sugar/m4sugar.m4 (m4_set_foreach): Don't expand dnl in all
callers.

Signed-off-by: Eric Blake <eblake@redhat.com>
---

diff --git a/lib/m4sugar/m4sugar.m4 b/lib/m4sugar/m4sugar.m4
index 5421ed48..f6be8bcd 100644
--- a/lib/m4sugar/m4sugar.m4
+++ b/lib/m4sugar/m4sugar.m4
@@ -3126,8 +3126,8 @@ m4_define([m4_set_empty],
 # guaranteed.  This is faster than the corresponding m4_foreach([VAR],
 #   m4_indir([m4_dquote]m4_set_listc([SET])), [ACTION])
 m4_define([m4_set_foreach],
-[m4_pushdef([$2])m4_set_map_sep([$1], [m4_define([$2],], [)$3])dnl
-m4_popdef([$2])])
+[m4_pushdef([$2])m4_set_map_sep([$1],
+[m4_define([$2],], [)$3])m4_popdef([$2])])
 
 # m4_set_intersection(SET1, SET2)
 # -------------------------------