On Tue, Mar 13, 2012 at 23:09, David Korn <[email protected]> wrote:
> cc: [email protected] > Subject: Re: [ast-users] [ksh93] `alias not found' for `arr=( a b )' > -------- > > > $ echo ${.sh.version} > > Version JMP 93u+ 2012-02-14 > > $ alias a=alias > > $ alias b='cd -' > > $ typeset -a arr=( a b ) > > $ arr=( a b ) > > b: alias not found <-- Bug? Why are aiases involved here? > > $ arr=( b a ) > > $ > > > > (attachment 1 7/334 text/html "1.att") > > > > The form > var=(...) > is a generic compound variable assignment. It is use for > indexed arrays, associative arrays, and for compound variables. > However, in some cases this is ambiguous. > > var=() > is this an empty compound variable, an empty indexed array, or > an empty associative array. By default, ambiguities lean towards > selection the compound variable. > > Another example, > var=(integer x=3) > This will be treated as a compound assignment defining x=3. However, > in order for this to work, the alias integer must be recognized. > Therefore, by default, the first work is alias expanded. > > Therefore, it is best to explicity specify which you want. > But how about this: typeset -a arr=( ( 11 22 33 ) ( ) ) Here arr[1] is created as a compond var which looks very counterintuitive to me. Users would be confused I think. > > typeset -a var=(integer x=3) > will define an indexed array with two elements, integer and x=3. The > first argument will not be checked for aliases. > typeset -a var=([3]=abc [foo]=def) > will define an indexed array with elements 3 and the arithmetic value > of foo $((foo)). > > Use > typeset -A for associative array definition. > > Use > typeset -C for compound assignment. > > > > David Korn > [email protected] >
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