ordering issues with side annotations

[sigmundch]

there is a potential ordering issue with how to combine interceptors that are annotated on the side via @ApplyInterceptorTo

Original comment from @mraleph:

If I import the same library twice into two other different libraries and on both imports I apply interceptors to the same member --- then it's not entirely clear how that should "stack".

Of course there is an obvious order induced by the order of import statements - but this order is somewhat hidden from the programmer.

[sigmundch]

This is an interesting point. Some ideas:

• require the user to specify the order somewhere else (this can be very hard to express though)
• make it invalid: detect potential ambiguity and make it a static error when it occurs.

[jakemac53]

also, how should those be ordered relative to existing annotations?

[sigmundch]

if they exist on the declaration itself, I'd say those always win/apply first.

[jakemac53]

you can imagine a situation where you needed your SideTag annotation to be first though