In addition to my previous reply I looked at the value assigned to d. The
~(X)-mode always drops the first digit of "15" and sets \2 to \1
cp003421_run> ksh -c 'x="a15 b2 c3" ;
d="${x//+([[:alnum:]]&[[:digit:]])/X\1Y\2}" ; print -v .sh.match;print $d'
(
(
15
2
3
)
(
15
2
3
)
)
aX15Y\2 bX2Y\2 cX3Y\2
cp003421_run> ksh -c 'x="a15 b2 c3" ;
d="${x//~(X)([[:alnum:]]&[[:digit:]])+/X\1Y\2}" ; print -v .sh.match;print $d'
(
(
15
2
3
)
(
5
2
3
)
)
aX5Y\2 bX2Y\2 cX3Y\2
cp003421_run> ksh -c 'x="a15 b2 c3" ;
d="${x//~(X)(([[:alnum:]])&([[:digit:]]))+/X\1Y\2}" ; print -v .sh.match;print
$d'
(
(
15
2
3
)
(
5
2
3
)
(
5
2
3
)
(
5
2
3
)
)
aX5Y5 bX2Y2 cX3Y3
~(K) should be the default, so adding it should make difference, however it does
cp003421_run> ksh -c 'x="a15 b2 c3" ;
d="${x//~(K)+([[:alnum:]]&[[:digit:]])/X\1Y\2}" ; print -v .sh.match;print $d'
a15 b2 c3
These effects are version independent
Best Regards
Axel Philipp
-----Ursprüngliche Nachricht-----
Von: [email protected]
[mailto:[email protected]] Im Auftrag von Dan Shelton
Gesendet: Dienstag, 20. August 2013 22:32
An: [email protected]; [email protected]
Betreff: [ast-users] Bug in ~(X) and .sh.match
I may have found a bug in ~(X). AFAIK the first index (.sh.match[0])
in .sh.match always lists all patterns for which matches have been
found, and all following indexes (.sh.match[0..inf]) store the
captured matches for a specific bracket pair, right?
If that's correct, why does '15' appear in .sh.match[0][0] but no
other match has '15' later?
ksh -c 'x="a15 b2 c3" ; d="${x//~(X)(([[:alnum:]])&([[:digit:]]))+/}"
; print -v .sh.match'
(
(
15
2
3
)
(
5
2
3
)
(
5
2
3
)
(
5
2
3
)
)
Dan
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