[llvm-branch-commits] [clang-tools-extra] [clangd] Add clangd 20 release notes (PR #127358)

[kadir çetinkaya via llvm-branch-commits]

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@@ -67,35 +68,84 @@ Semantic Highlighting
 Compile flags
 ^^^^^^^^^^^^^
 
+- Fixed a bug where clangd would unnecessarily reparse open files whose
+  compile command did not change when receiving a new compile command
+  via an LSP `workspace/configuration` request (#GH115438)
+
 Hover
 ^^^^^
 
+- Hovering over a function name now shows the function's documentation
+  comment even if the comment is written above the function's out-of-line
+  definition in a different source file (#GH67802)
+
 Code completion
 ^^^^^^^^^^^^^^^
 
+- Added an `ArgumentLists` config option under `Completion`. This is a more
+  flexible version of the `--function-arg-placeholders` command line flag,
+  allowing users more detailed control of what is inserted in argument list
+  position when clangd completes the name of a function in a function call
+  context. (#GH111322)
+- Clangd now supports configuring which headers should be inserted using 
+  `<>` vs. `""` syntax using the `QuotedHeaders` and `AngledHeaders` config
+  options under `Style` (#GH67749)
 - Added completion for C++20 keywords.
+- Clangd's `HeuristicResolver` component was upstreamed to `libSema` where
+  code completion can take advantage of it, resulting in improved code
+  completion in templated code
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kadircet wrote:

nit: I'd keep it more relevant to users and say something like  `improved handling in dependent/templated code`.

https://github.com/llvm/llvm-project/pull/127358