Namespaces

[Jeff Dyer]

On 12/12/07 11:13 AM, Michael O'Brien wrote:

> I've got a question about how user defined namespaces should resolve
> inside of packages.  This is really an ES4 implementation question and
> not a usage question.
> 
> Consider:
> 
> package one {
>     public namespace blue = "http://blue"
> }
> 
> package one {
>     use namespace blue
>     blue var x :int
> }
> 
> 
> package two {
>     public namespace blue = "http://blue"
> }
> 
> package two {
>     use default namespace blue
>     blue var x : string
> }
> 
> 
> 
> This fails to compile as the two "blue var x" declarations have
> different fixture types. So this implies that variable declarations
> inside packages that have namespaces with identical URI => are not
> defined with any package qualification. ie. the namespace is the only
> qualification. This is what I expected, but just
> wanted to confirm this.

That is correct. A namespace attribute in a package body overrides the
default package qualifier. AS3 allowed only public and internal at this
level, but we have agreed that we would allow such use of namespaces inside
of packages and interfaces. #335 just opened to clarify.

> 
> Also, I noticed in the RI that you can't have namespace (and other)
> declarations outside of a "package {" block. ie.
> 
> namespace blue
> package {
> }
> 
> 
> will fail to compile, but put the namespace declaration inside of
> "package {" and it works. Surely, these declarations should be allowed
> outside an explict package declaration due to the fact that there is an
> implicit "package {" around global declarations?

The error probably has to do with the fact that the current grammar requires
packages to be defined at the top of a compilation unit. It is our intention
to change this letting package definitions to be interspersed with other
definitions and statements.

Jd
> 
> Michael O'Brien
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