[PATCH] D50847: [clangd] Add callbacks on parsed AST in addition to parsed preambles

[Ilya Biryukov via Phabricator via cfe-commits]

ilya-biryukov created this revision.
ilya-biryukov added a reviewer: hokein.
Herald added subscribers: arphaman, jkorous, MaskRay, ioeric, javed.absar.

Will be used for updating the dynamic index on updates to the open files.
Currently we collect only information coming from the preamble
AST. This has a bunch of limitations:

- Dynamic index misses important information from the body of the file, e.g. locations of definitions.
- XRefs cannot be collected at all, since we can only obtain full information for the current file (preamble is parsed with skipped function bodies, therefore not reliable).

This patch only adds the new callback, actually updating the index
will be added in a follow-up patch.


Repository:
  rCTE Clang Tools Extra

https://reviews.llvm.org/D50847

Files:
  clangd/ClangdServer.cpp
  clangd/ClangdServer.h
  clangd/TUScheduler.cpp
  clangd/TUScheduler.h
  unittests/clangd/TUSchedulerTests.cpp

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