[cdt-dev] Knowing we are a CDT launch

[Marc Khouzam <marc.khouzam@xxxxxxxxxxxx>]

Hi,

as part of 
https://bugs.eclipse.org/bugs/show_bug.cgi?id=248627 Add an option to show full paths for the stack frame source location

I need to be able to know if the 'show full path' option should be enabled.  This is a global option, which should be enabled
as soon as we have a launch that supports it.
The way it is handled now, is to see if the debug view contains a debug target that is an ICDebugElement.
The problem is that for DSF, we don't use ICDebugElement, so this option is always disabled for DSF.

My thought was that we need a way to see if there is a CDT launch currently active.
To do that we would need to add a new empty interface, ICLaunch, which CDT launches would implement (CDI and DSF).

The other option is to add a more specific interface, IShowFullPathTarget, which CDT launches that want to support
that option, would implement.  This solution is more future-proof, because, if we have other options that need to be handled in
the same way, it would allow each debugger integration to pick and choose which options to support.  For example, CDI
could implement IShowFullPath and IMyOtherOption, while DSF would only implement IShowFullPath, if there was no
support for the MyOtherOption.  Having a single ICLaunch interface is simpler but less flexible.

I like the second option better, but I'm worried I may be overly specific, which could lead to a bunch of interfaces.

Anyone have an opinion?
And does anyone object to one or both of these new interfaces?

Thanks

Marc