[jawsscripts] Re: Variant data type in JAWS scripts

Thanks, Doug.  If a function is defined with a variant parameter, do you
know how its subtype can be determined at runtime?

Jamal
On Wed, 24 Sep 2008, Doug Lee
wrote:

> Date: Wed, 24 Sep 2008 13:29:44 -0400
> From: Doug Lee <doug.lee@xxxxxxxxxxxxxxxx>
> Reply-To: jawsscripts@xxxxxxxxxxxxx
> To: jawsscripts@xxxxxxxxxxxxx
> Subject: [jawsscripts] Re: Variant data type in JAWS scripts
>
> Variant is an undocumented variable type in JAWS scripting that I have
> often used in order to obtain a degree of polymorphism.  I boldly
> assume that you are taking interest in this after examining some of
> the BX source code. <grin>
>
> In any case, yes, the compiler doesn't fully support Variant, but it
> does partially.  You can't say "let v = 0," but you can say "let v =
> vcast(0)" if vcast() is defined as
>
> variant function vcast(variant v)
> return v
> endFunction
>
> olutil.jsl contains a version of that little piece of glue, under the
> name olVCast().
>
> On Wed, Sep 24, 2008 at 01:00:28PM -0400, Jamal Mazrui wrote:
> I would like to learn more about how the variant data type may be used in
> JAWS scripts.  Apparently, it may be used as a parameter or return value,
> as well as a local or global variable.  When I tried to assign a number to
> a variant variable, however, the compiler complained about a type
> mismatch.  I find no functions specifically for converting to or from
> variants.  Does anyone know what conversions are done automatically and
> what conversions can be done with existing conversion functions like
> IntToString?
>
> Jamal
>
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> --
> Doug Lee, Senior Accessibility Programmer
> SSB BART Group - Accessibility-on-Demand
> mailto:doug.lee@xxxxxxxxxxxxxxxx  http://www.ssbbartgroup.com
> "While they were saying among themselves it cannot be done,
> it was done." --Helen Keller
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