[all-commits] [llvm/llvm-project] ec4c47: Add code completion for C++20 keywords. (#107982)

[ykiko via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ec4c47d9490c90a98f2dda3fc9ff7c51782678f8
      https://github.com/llvm/llvm-project/commit/ec4c47d9490c90a98f2dda3fc9ff7c51782678f8
  Author: ykiko <ykikoykikoykiko at gmail.com>
  Date:   2024-11-26 (Tue, 26 Nov 2024)

  Changed paths:
    M clang-tools-extra/docs/ReleaseNotes.rst
    M clang/lib/Parse/ParseDeclCXX.cpp
    M clang/lib/Sema/SemaCodeComplete.cpp
    A clang/test/CodeCompletion/keywords-cxx20.cpp

  Log Message:
  -----------
  Add code completion for C++20 keywords. (#107982)

This commit adds code completion for C++20 keywords, fix
https://github.com/llvm/llvm-project/issues/107868.

1. complete `concept` in template context
    - [x] `template<typename T> conce^` -> `concept`
    - [ ] `conce^`

2. complete `requires` 
- [x] constraints in template context: `template<typename T> requi^` ->
`requires`
- [x] requires expression: `int x = requ^` -> `requires (parameters) {
requirements }`
- [x] nested requirement: `requires { requ^ }` -> `requires expression
;`

3. complete coroutine keywords
    - [x] `co_await^` in expression: `co_aw^` -> `co_await expression;`
- [x] `co_yield` in function body: `co_yi^` -> `co_yield expression;`
- [x] `co_return` in function body: `co_re^` -> `co_return expression;`

4. specifiers: `char8_t`, `consteval`, `constinit`



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