[PATCH] D88338: [clangd] clangd --check: standalone diagnosis of common problems

[Sam McCall via Phabricator via cfe-commits]

sammccall created this revision.
sammccall added a reviewer: kadircet.
Herald added subscribers: cfe-commits, usaxena95, arphaman, mgorny.
Herald added a project: clang.
sammccall requested review of this revision.
Herald added subscribers: MaskRay, ilya-biryukov.

This is a tool to simply parse a file as clangd would, and run some
common features (code actions, go-to-definition, hover) in an attempt to
trigger or reproduce crashes, error diagnostics, etc.

This is easier and more predictable than loading the file in clangd, because:

- there's no editor/plugin variation to worry about
- there's no accidental variation of user behavior or other extraneous requests
- we trigger features at every token, rather than guessing
- everything is synchronoous, logs are easier to reason about
- it's easier to (get users to) capture logs when running on the command-line

This is a fairly lightweight variant of this idea.
We could do a lot more with it, and maybe we should.
But I can't in the near future, and experience will tell us if we made
the right tradeoffs and if it's worth investing further.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D88338

Files:
  clang-tools-extra/clangd/test/check-fail.test
  clang-tools-extra/clangd/test/check.test
  clang-tools-extra/clangd/tool/CMakeLists.txt
  clang-tools-extra/clangd/tool/Check.cpp
  clang-tools-extra/clangd/tool/ClangdMain.cpp

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