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https://issues.apache.org/jira/browse/FLEX-33332?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13541085#comment-13541085
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Roland Zwaga commented on FLEX-33332:
-------------------------------------
As an addendum, I think this would be probably the simplest way of defining a
list of value constraints for an annotation argument:
public var options:Vector.<String> = new <String>("option1", "option2");
Obviously, if an argument is a class, the compiler can check if the qualified
name exists:
public var clazz:Class;
It would be even nicer if somehow the Class value could be constrained as well,
for instance, the arguments needs to be
of type Class, but the Class needs to be a subclass of Event.
I don't have an immediate idea for a clean solution to that, so if anyone has
ideas, please chime in.
> Make metadata annotations first class AS3 citizens
> --------------------------------------------------
>
> Key: FLEX-33332
> URL: https://issues.apache.org/jira/browse/FLEX-33332
> Project: Apache Flex
> Issue Type: Improvement
> Components: Compiler API
> Affects Versions: Apache Flex 4.9.0
> Reporter: Roland Zwaga
> Assignee: Michael Schmalle
> Priority: Minor
>
> Currently metadata annotations are only checked by certain IDE's using some
> sort of extra metadata.
> Making metadata first class AS3 citizens would allow the compiler to check
> and verify annotations.
> So, for each metadata tag there would need to exist a corresponding AS3 class
> that describes this tag,
> In practice, an annotation like this:
> [Bindable(event="dataChanged")]
> public var data:String;
> There would need to exist a class like this:
> [MetadataAnnotation]
> public class Bindable {
> [Optional]
> public var event:String;
> }
> Or something like that...
> The MetadataAnnotation metadata would be the entry point for the compiler.
> The actual class would not necessarily need to be compiled in the eventual
> target. (Or maybe it should, perhaps for JS cross-compilation this could
> actually enable annotation support...)
> Thoughts? Suggestions?
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