[PATCH] D49658: [clangd] Index Interfaces for Xrefs

[Haojian Wu via Phabricator via cfe-commits]

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

This is the first step of implementing Xrefs in clangd:

- add index interfaces, and related data structures.
- implement a naive in-memory index for symbol occurrences.


Repository:
  rCTE Clang Tools Extra

https://reviews.llvm.org/D49658

Files:
  clangd/FindSymbols.h
  clangd/index/FileIndex.cpp
  clangd/index/FileIndex.h
  clangd/index/Index.cpp
  clangd/index/Index.h
  clangd/index/MemIndex.cpp
  clangd/index/MemIndex.h
  clangd/index/Merge.cpp
  unittests/clangd/CodeCompleteTests.cpp
  unittests/clangd/IndexTests.cpp

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