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39777: $() is a valid empty command substitution

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Peter Stephenson 2016-10-30 17:12:04 +00:00
parent ab81b98c49
commit 88c42a2ba0
3 changed files with 20 additions and 1 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2016-10-30 Peter Stephenson <p.w.stephenson@ntlworld.com>
* 39777: Src/parse.c, Test/D08cmdsubst.ztst: $() is a valid
empty command substitution.
2016-10-29 Barton E. Schaefer <schaefer@zsh.org> 2016-10-29 Barton E. Schaefer <schaefer@zsh.org>
* 39758: Src/builtin.c, Src/params.c: revise 39704 to output * 39758: Src/builtin.c, Src/params.c: revise 39704 to output

2
Src/parse.c
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@ -594,7 +594,7 @@ par_event(int endtok)
if (tok == ENDINPUT) if (tok == ENDINPUT)
return 0; return 0;
if (tok == endtok) if (tok == endtok)
return 0; return 1;
p = ecadd(0); p = ecadd(0);

14
Test/D08cmdsubst.ztst
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@ -153,3 +153,17 @@
eval 'foo echo this just works, OK\?)' eval 'foo echo this just works, OK\?)'
0:backtracking within command string parsing with alias still pending 0:backtracking within command string parsing with alias still pending
>this just works, OK? >this just works, OK?
(
set errexit
show_nargs() { print $#; }
print a $() b
print c "$()" d
)
0:Empty $() is a valid empty substitution.
>a b
>c d
empty=$() && print "'$empty'"
0:Empty $() is a valid assignment
>''