[PATCH] D120258: [clangd] Add inlay hints for auto-typed parameters with one instantiation.

[Sam McCall via Phabricator via cfe-commits]

sammccall created this revision.
sammccall added reviewers: nridge, Trass3r.
Herald added subscribers: usaxena95, kadircet, arphaman.
sammccall requested review of this revision.
Herald added subscribers: cfe-commits, MaskRay, ilya-biryukov.
Herald added a project: clang-tools-extra.

This takes a similar approach as b9b6938183e <https://reviews.llvm.org/rGb9b6938183e837e66ff7450fb2b8a73dce5889c0>, and shares some code.
The code sharing is limited as inlay hints wants to deduce the type of the
variable rather than the type of the `auto` per-se.

It drops support (in both places) for multiple instantiations yielding the same
type, as this is pretty rare and hard to build a nice API around.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D120258

Files:
  clang-tools-extra/clangd/AST.cpp
  clang-tools-extra/clangd/AST.h
  clang-tools-extra/clangd/InlayHints.cpp
  clang-tools-extra/clangd/unittests/ASTTests.cpp
  clang-tools-extra/clangd/unittests/InlayHintTests.cpp
  clang-tools-extra/clangd/unittests/TestTU.cpp

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