Dan Douglas dixit:
>For "$@" that sounds about right. I think it would be preferable if x="$@" and
>x=$@ were the same. If a user wants IFS-delimited they should probably use
Turns out you’ll get them being the same:
• foo <<<"$@" uses the unquoted $@ inside a quoted string,
not the quoted $@, interpretation, because here document
separators (which here strings are handled as) are special
• it’s impossible to treat x="$@" and for x in "$@" differently
because the expansion subroutine cannot know it’s being used
to generate a scalar (because the for x in also generates a
scalar but then applies IFS splitting to it)
Patch attached, it breaks IFS-colon-1 regression test. With this
and my earlier interpretation of the standard and its omissions,
I’ll keep the current behaviour of mksh instead (and in the future,
${foo[@]@Q} will get special treatment instead of just a “DDTT”
when someone uses IFS with it, we’ll see). Note that passing whole
arrays in mksh will, eventually, use JSON natively.
bye,
//mirabilos
--
„nein: BerliOS und Sourceforge sind Plattformen für Projekte, github ist
eine Plattform für Einzelkämpfer“
-- dieses Zitat ist ein Beweis dafür, daß auch ein blindes Huhn
mal ein Korn findet, bzw. – in diesem Fall – Recht haben kannIndex: check.t
===================================================================
RCS file: /cvs/src/bin/mksh/check.t,v
retrieving revision 1.599
diff -u -p -r1.599 check.t
--- check.t 24 Feb 2013 14:22:41 -0000 1.599
+++ check.t 5 Mar 2013 16:07:35 -0000
@@ -3454,6 +3454,43 @@ expected-stdout:
<3> <A> <B> <C>
<4> <A> <B> <C>
---
+name: IFS-colon-2
+description:
+ Complex test, IFS=:, with $* and $@ in all variants
+stdin:
+ function expassign {
+ typeset -a a
+ a=("$@")
+ typeset var asn
+
+ while IFS= read -r asn; do
+ IFS=: command eval "$asn"
+ #printf '%-14s... %s\n' "$asn" "$var"
+ typeset -L14 f=$asn; print -r -- "$f... $var"
+ done <<\EOF
+ var=${a[*]}
+ var="${a[*]}"
+ var=$*
+ var="$*"
+ var=${a[@]}
+ var="${a[@]}"
+ var=$@
+ var="$@"
+ EOF
+ }
+
+ ${ZSH_VERSION+:} false && emulate ksh
+ expassign one:::two three:::four
+expected-stdout:
+ var=${a[*]} ... one:::two:three:::four
+ var="${a[*]}" ... one:::two:three:::four
+ var=$* ... one:::two:three:::four
+ var="$*" ... one:::two:three:::four
+ var=${a[@]} ... one:::two:three:::four
+ var="${a[@]}" ... one:::two three:::four
+ var=$@ ... one:::two:three:::four
+ var="$@" ... one:::two three:::four
+---
name: IFS-null-1
description:
Simple test, IFS=""
Index: eval.c
===================================================================
RCS file: /cvs/src/bin/mksh/eval.c,v
retrieving revision 1.137
diff -u -p -r1.137 eval.c
--- eval.c 23 Feb 2013 20:03:30 -0000 1.137
+++ eval.c 5 Mar 2013 16:07:35 -0000
@@ -865,6 +865,8 @@ expand(
/* terminate word for "$@" */
type = XARGSEP;
quote = 0;
+ /* always space-separate words */
+ c = ' ';
}
}
break;
