[Laszlo-dev] LZX type declarations [Was: For Review: Change 20081021-dda-p Summary: Add return type declarations to SWF9]

[Donald Anderson]

Which do you like "return" or "returns"?  I'll make this change and  
fix the cast and retest.
I'd defer any other additions like naming return values:  
returns="done:Boolean".

On Oct 21, 2008, at 11:53 AM, P T Withington wrote:

> On 2008-10-21, at 11:45EDT, André Bargull wrote:
>
>> Was it already decided how to declare return types in LZX? So, how  
>> to name the attribute which specifies the type? It's now named  
>> "type", any other proposals? Like "return" or "returns"?
>
> Yes: http://www.openlaszlo.org/pipermail/laszlo-dev/2008-February/013150.html
>
> This is an API addition, so does not need to be vetted like a  
> change, but I think I prefer "return" or "returns" over "type".  I  
> would even propose that you should be able to name the return value  
> (purely for documentation purposes), e.g.:
>
>  <method name="update" args="when:Date" returns="done:Boolean>
>
>> Any cast needs to be: "foo cast Bar", "Bar(foo)" is only available  
>> in plain AS3 code, in cross-runtime code the latter form is a  
>> function call. (That's why DHTML broke for you.)
>>
>> We should consider to drop the lowercase "type"-declarations for  
>> <attribute> and instead prefer the JavaScript alternatives, because  
>> you need to use the Javascript-form anywhere else (typing for  
>> function arguments, variables,  function return types).
>
> I agree.  Originally, we used lower-case in LZX because a) it looked  
> pretty, and b) it is meant to match XML standards.  But this means  
> we have to map from the LZX/XML type to the appropriate Javascript  
> type (and document separately the LZX and JS API's of every public  
> class.  It's made especially messy by JS's bi-cameral types (boolean/ 
> Boolean, etc.)  We are probably stuck with the XML types for  
> backwards compatibility, but we should encourage using JS types as  
> we go forward.
>
>


--

Don Anderson
Java/C/C++, Berkeley DB, systems consultant

voice: 617-547-7881
email: dda at ddanderson.com
www: http://www.ddanderson.com



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