[clangd] Add ClangdUnit diagnostics tests using annotated code.

Summary:
This adds checks that our diagnostics emit correct ranges in a bunch of cases,
as promised in D41118.

The diagnostics-preamble test is also converted and extended to be a little more
precise.

diagnostics.test stays around as the smoke test for this feature.

Reviewers: ilya-biryukov

Subscribers: klimek, mgorny, cfe-commits

Differential Revision: https://reviews.llvm.org/D41454

llvm-svn: 323448
5 files changed
tree: a57574e3e659426df19a75c9e21e6b3f24d700a7
  1. clang/
  2. clang-tools-extra/
  3. compiler-rt/
  4. debuginfo-tests/
  5. libclc/
  6. libcxx/
  7. libcxxabi/
  8. libunwind/
  9. lld/
  10. lldb/
  11. llgo/
  12. llvm/
  13. openmp/
  14. parallel-libs/
  15. polly/
  16. README.md
README.md

Low Level Virtual Machine (LLVM)

This directory and its subdirectories contain source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and runtime environments.