This encapsulates logic for how to report particular error messages.
So far only used for reporting an actor not containing a wait statement,
as this warning should be suppressed in certain contexts.
We could change other error messages to use this class, but since they
don't have any logic I don't think the extra indirection is appropriate.
If an actor is forward declared it is kind of
awkward as the signatures don't fit. For example:
Future<Void> foo(int const& bar);
is the correct forward declaration for this actor:
ACTOR Future<Void> foo(int bar);
This also means that a lot of tooling (like rtags/cquery etc)
doesn't work correctly. It will show errors that the function
calls are ambiguous and "find references"-features typically
don't work.
Allowing to do this in the actor compiler is the first step. The
next will be to refactor all forward declarations.
Andrew Noyes