Yegappan wrote:
> The following Vim9 function fails with "E1141: Indexable type required":
>
> ======================================================
> vim9script
>
> def g:Test()
> var req = {}
> req.params = {}
> req.params.id = 10
> echomsg req
> enddef
> call g:Test()
> ======================================================
>
> The following legacy function works:
>
> ======================================================
> func g:Test()
> let req = {}
> let req.params = {}
> let req.params.id = 10
> echomsg req
> endfunc
> call g:Test()
> ======================================================
>
> Am I missing something here?
The type of "req" is not specified. You initialize it with {}, which is
a dict with unknown member type. You assign it a dict in the second
line, but that doesn't change the type. In the third line you try to
access a member of an unknown. At this point we expect a list or a
dict, with an unknown we don't know what to do.
We could assume the ".id" indicates it should be a dict and turn this
into a runtime type check, but that may hide problems. Best is to
declare the type of "req":
var req: dict<dict<number>> = {}
Then it works.
--
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A: I collect hobbies.
/// Bram Moolenaar -- [email protected] -- http://www.Moolenaar.net \\\
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