Use ClangASTContext for compilation units with DW_LANG_RUST

[michaelwoerister]

Summary

Up until recently, LLDB would always use a ClangASTContext, regardless which language was specified in DWARF. While this is not a perfect solution for Rust programs, it at least enabled LLDB to step through them and display variable contents. Until there is a proper Rust language plugin for LLDB, we'd like to keep this behavior so that user can keep using LLDB with the restricted but useful feature set available up until a few months ago.

[jasonmolenda]

Looks good to me. Should I commit this for you, or do you have/want to set up commit access?

[michaelwoerister]

If you could commit that for me, that'd be great! I might be interested in getting commit access when work on a Rust plugin has begun, but for now I'm good without. Thanks again for your help throughout the process.

[jasonmolenda]

Committed in r267667.

source/Symbol/ClangASTContext.cpp

                Language::LanguageIsC (language) ||
                Language::LanguageIsCPlusPlus (language) ||
                Language::LanguageIsObjC (language) ||
+               // Use Clang for Rust until there is a proper language plugin for it
+               language == eLanguageTypeRust ||
                language == eLanguageTypeExtRenderScript;
     }
 }