CoreDslScopeProvider Rewrite

[AtomCrafty]

Completely rewrites com.minres.coredsl.scoping.CoreDslScopeProvider from scratch.

Model changes:

• EnumMemberDeclaration is now a subtype of NamedEntity. This is necessary so EntityReferences can target enum members.
• Added intrinsic functions bitalignof and bitoffsetof as counterparts of alignof and offsetof.

Currently supported tasks:

• Resolving instruction set names (also from imported files).
• Resolving struct, union and enum type names (both within the same ISA the type is declared in and in derived ISAs).
• Resolving function parameters, instruction encoding fields and local variables (including for loop index declaration).
• Resolving isa state elements, functions and enum members (also those declared in super types).
• Resolving member names for member access expressions ((a.b).*).
• Resolving member names for offsetof expressions (offsetof(struct T, *) and offsetof(expressionOfTypeT, *)).

I assumed enum members should be scoped the same way as in C, so they are simply added to the global ISA scope as constants.

@eyck is it possible to disable generation of CoreDslScopeProvider.java when the mwe2 workflow is run? The implementation is located in an .xtend file, but the .java file is regererated anyway. I believe you previously solved this by moving the actual implementation to XtCoreDslScopeProvider.xtend and subclassing the auto-generated class, but that feels like an ugly hack. Fixed it by providing an empty stub file myself. Not the prettiest solution, but still better than before.

[jopperm]

@eyck Does the model change affect you or can this PR just land?

[eyck]

@eyck Does the model change affect you or can this PR just land?

No, there is no problem integrating this.