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31849: document effect of KSH_ZERO_SUBSCRIPT on the argv special array

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Barton E. Schaefer 2013-10-19 14:29:52 -07:00
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@ -1,3 +1,8 @@
2013-10-19 Barton E. Schaefer <schaefer@zsh.org>
* 31849: Doc/Zsh/params.yo: note effect of KSH_ZERO_SUBSCRIPT
on the arrays of positional parameters e.g. ${argv[0]} vs. $0
2013-10-18 Peter Stephenson <p.w.stephenson@ntlworld.com> 2013-10-18 Peter Stephenson <p.w.stephenson@ntlworld.com>
* 31846: Src/exec.c: fix NOEXEC option in execsimple(). * 31846: Src/exec.c: fix NOEXEC option in execsimple().

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Doc/Zsh/params.yo
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@ -431,9 +431,15 @@ of a shell function, shell script, or the shell itself; see
noderef(Invocation), and also noderef(Functions). noderef(Invocation), and also noderef(Functions).
The parameter var(n), where var(n) is a number, The parameter var(n), where var(n) is a number,
is the var(n)th positional parameter. is the var(n)th positional parameter.
The parameter `tt($0)' is a special case, see
noderef(Parameters Set By The Shell).
The parameters tt(*), tt(@) and tt(argv) are The parameters tt(*), tt(@) and tt(argv) are
arrays containing all the positional parameters; arrays containing all the positional parameters;
thus `tt($argv[)var(n)tt(])', etc., is equivalent to simply `tt($)var(n)'. thus `tt($argv[)var(n)tt(])', etc., is equivalent to simply `tt($)var(n)'.
Note that the options tt(KSH_ARRAYS) or tt(KSH_ZERO_SUBSCRIPT) apply
to these arrays as well, so with either of those options set,
`tt(${argv[0]})' is equivalent to `tt($1)' and so on.
Positional parameters may be changed after the shell or function starts by Positional parameters may be changed after the shell or function starts by
using the tt(set) builtin, by assigning to the tt(argv) array, or by direct using the tt(set) builtin, by assigning to the tt(argv) array, or by direct