Re: [Swftools-common] Invalid reference produces warning, not error

[Matthias Kramm]

On Thu, Jul 02, 2009 at 02:13:46PM +0100, Matthew Ayres <address@hidden> wrote:
> In its default mode as3compile (swftools 0.9.0) produces no messages
> regarding this line of code.
> 
> In verbose mode it reports:
> VirtualZoo.as:10:12: warning: Resolving eatt on unknown type
> VirtualZoo.as:11:11: warning: Resolving eat on unknown type

ActionScript is tricky for a compiler, because there
are circumstances where it *cannot* know which object
you're working on.
Consider this code:

    var o:Object;
    if(Math.random()<0.5)
        o.member = new String()
    else
        o.member = new Matrix3D()
    o.member.transpose();

There's no way of telllng whether "o.member" is
a String or a Matrix3D, and hence, whether it'll
have the transpose() method or not.

Matthias