[clang] [clang-repl] Extend the C support. (PR #89804)

[Jun Zhang via cfe-commits]

junaire wrote:

Just found out this keeps popping up from my notification, and I would like give my 2 cents, maybe can provide some insights:

Looking at the backtrace of the failing tests, I noticed we ran into `clang::Parser::ParseTopLevelStmtDecl()` which makes me very confused. Do we actually enable the incremental extension in lldb? I grep it in lldb codebase and the only occurrence is here https://github.com/llvm/llvm-project/blob/b91b8fea8c58e9b414e291df677b12ca44197784/lldb/source/Plugins/ExpressionParser/Clang/ClangModulesDeclVendor.cpp#L662

The other thing I noticed is that the failure looks like have something to do with the objc, can we also check the current language we're compiling when skipping removing the name for the lexical scope?

https://github.com/llvm/llvm-project/pull/89804