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Fix m4_set speed regression introduced 2008-12-18.

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* lib/m4sugar/m4sugar.m4 (_m4_stack_reverse): Alter API to avoid
creating larger argument on each iteration.
(m4_stack_foreach_sep, m4_stack_foreach_sep_lifo)
(_m4_set_contents_2): Adjust all four-argument callers.

Signed-off-by: Eric Blake <ebb9@byu.net>
This commit is contained in:
Eric Blake 2009-02-12 08:27:18 -07:00
parent e8e30e268d
commit be5eef442d
2 changed files with 19 additions and 10 deletions
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8
ChangeLog
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@ -1,3 +1,11 @@
2009-02-12 Eric Blake <ebb9@byu.net>
Fix m4_set speed regression introduced 2008-12-18.
* lib/m4sugar/m4sugar.m4 (_m4_stack_reverse): Alter API to avoid
creating larger argument on each iteration.
(m4_stack_foreach_sep, m4_stack_foreach_sep_lifo)
(_m4_set_contents_2): Adjust all four-argument callers.
2009-02-05 Eric Blake <ebb9@byu.net>
Mention new AC_DEFUN_ONCE clients.

21
lib/m4sugar/m4sugar.m4
View File

@ -1295,10 +1295,10 @@ m4_define([m4_stack_foreach_lifo],
# is equivalent to m4_stack_foreach_sep([a], [b(], [)]).
m4_define([m4_stack_foreach_sep],
[_m4_stack_reverse([$1], [m4_tmp-$1])]dnl
[_m4_stack_reverse([m4_tmp-$1], [$1], [$2[]_m4_defn([m4_tmp-$1])$3], [$4])])
[_m4_stack_reverse([m4_tmp-$1], [$1], [$2[]_m4_defn([m4_tmp-$1])$3], [$4[]])])
m4_define([m4_stack_foreach_sep_lifo],
[_m4_stack_reverse([$1], [m4_tmp-$1], [$2[]_m4_defn([m4_tmp-$1])$3], [$4])]dnl
[_m4_stack_reverse([$1], [m4_tmp-$1], [$2[]_m4_defn([m4_tmp-$1])$3], [$4[]])]dnl
[_m4_stack_reverse([m4_tmp-$1], [$1])])
@ -1307,15 +1307,16 @@ m4_define([m4_stack_foreach_sep_lifo],
# A recursive worker for pushdef stack manipulation. Destructively
# copy the OLD stack into the NEW, and expanding ACTION for each
# iteration. After the first iteration, SEP is promoted to the front
# of ACTION. The current definition is examined after the NEW has
# been pushed but before OLD has been popped; this order is important,
# as ACTION is permitted to operate on either _m4_defn([OLD]) or
# _m4_defn([NEW]). Since the operation is destructive, this macro is
# generally used twice, with a temporary macro name holding the
# swapped copy.
# of ACTION (note that SEP should include a trailing [] if it is to
# avoid interfering with ACTION). The current definition is examined
# after the NEW has been pushed but before OLD has been popped; this
# order is important, as ACTION is permitted to operate on either
# _m4_defn([OLD]) or _m4_defn([NEW]). Since the operation is
# destructive, this macro is generally used twice, with a temporary
# macro name holding the swapped copy.
m4_define([_m4_stack_reverse],
[m4_ifdef([$1], [m4_pushdef([$2],
_m4_defn([$1]))$3[]_m4_popdef([$1])$0([$1], [$2], [$4[]$3])])])
_m4_defn([$1]))$3[]_m4_popdef([$1])$0([$1], [$2], [$4$3])])])
@ -2955,7 +2956,7 @@ m4_define([_m4_set_contents_1c],
m4_define([_m4_set_contents_2],
[_m4_stack_reverse([_m4_set_($1)], [_m4_set([$1])],
[$2[]_m4_defn([_m4_set_($1)])$3], [$4])])
[$2[]_m4_defn([_m4_set_($1)])$3], [$4[]])])
# m4_set_delete(SET)
# ------------------