[PATCH] D88281: [clangd] Use Decision Forest to score code compeltions.

[Utkarsh Saxena via Phabricator via cfe-commits]

usaxena95 created this revision.
Herald added subscribers: cfe-commits, kadircet, arphaman, mgrang.
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Herald added subscribers: MaskRay, ilya-biryukov.

By default clangd scores a code completion item using heuristic model.
Scoring can be done by Decision Forest by passing --ranking_model=df to
clangd.

TODO:

- Explain and backup the heuristic for combining NameMatch and DF prediction.
- Maybe add tests for sanity.
- Add end-to-end latency metrics.
- Add extra debug logging for the DF model.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D88281

Files:
  clang-tools-extra/clangd/CodeComplete.cpp
  clang-tools-extra/clangd/CodeComplete.h
  clang-tools-extra/clangd/tool/ClangdMain.cpp
  clang-tools-extra/clangd/unittests/CodeCompleteTests.cpp

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