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From Michael Schmalle <apa...@teotigraphix.com>
Subject RE: [jira] [Commented] (FLEX-33320) Falcon doesn't allow multiline member access
Date Thu, 20 Dec 2012 18:30:42 GMT
I agree. non required semicolons that should end statements don't help  
in the AS3 grammar either (for solving ambiguities like this).

Mike

Quoting Gordon Smith <gosmith@adobe.com>:

> There has always been an ambiguity in AS3 about [Foo] being  
> interpretable as either metadata or as property access. (This is one  
> reason we're changing the metadata syntax in AS4!) I don't remember  
> the rule in the old compiler, but I think Falcon's rule is that if  
> the [Foo] is the first nonwhitespace on a line then it is metadata,  
> and this seems reasonable to me so I don't particularly want to  
> change it.
>
> - Gordon
>
>
> -----Original Message-----
> From: Michael Schmalle (JIRA) [mailto:jira@apache.org]
> Sent: Thursday, December 20, 2012 8:05 AM
> To: flex-dev@incubator.apache.org
> Subject: [jira] [Commented] (FLEX-33320) Falcon doesn't allow  
> multiline member access
>
>
>     [  
> https://issues.apache.org/jira/browse/FLEX-33320?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13537104#comment-13537104
 
> ]
>
> Michael Schmalle commented on FLEX-33320:
> -----------------------------------------
>
> Have to check ECMA script or the AS3 docs. If this stuff is allowed,  
> then this is a bug in the grammar of antlr or the BaseASParser. I  
> could see this as being a not so hard fix since to get into the  
> array access or member state there has to be a correct predicate  
> which would be foo. or foo[a]
>
> If Gordon doesn't chime in, I will look at the implementation. This  
> is where it sucks we don't have unit tests for the ASParser!
>
>> Falcon doesn't allow multiline member access
>> --------------------------------------------
>>
>>                 Key: FLEX-33320
>>                 URL: https://issues.apache.org/jira/browse/FLEX-33320
>>             Project: Apache Flex
>>          Issue Type: Bug
>>            Reporter: Chema Balsas
>>              Labels: Falcon
>>         Attachments: MultilineArrayAccess.as, MultilineObjectAccess.as
>>
>>
>> Falcon doesn't allow multiline member access.
>> Try to compile any of the attached examples. Both are supposed to  
>> render a textfield in the screen with the text "A test text" in it.
>> Falcon fails to compile both with errors like:
>> Internal error: Unable to generate code for 'MetaTags'
>> /Users/jbalsas/Documents/dev/apache/flex/falcon/trunk/compiler/tests/M
>> ultilineObjectAccess.as:12
>> Warning: Metadata was not bound to a definition
>> 	        					["bar"];
>
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-- 
Michael Schmalle - Teoti Graphix, LLC
http://www.teotigraphix.com
http://blog.teotigraphix.com


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