[clang] [clang-format] Handle Trailing Whitespace After Line Continuation (P2… (PR #145243)

https://github.com/naveen-seth created https://github.com/llvm/llvm-project/pull/145243 …223R2) Fixes #145226. Implement [P2223R2](https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p2223r2.pdf) in clang-format to correctly handle cases where a backslash '\\' is followed by trailing w

[clang] [clang][Preprocessor] Handle the first pp-token in EnterMainSourceFile (PR #145244)

llvmbot wrote: @llvm/pr-subscribers-clang Author: None (yronglin) Changes Depends on [[clang][Preprocessor] Add peekNextPPToken, makes look ahead next token without side-effects](https://github.com/llvm/llvm-project/pull/143898). This PR fix the performance regression that introduced in

[clang] [clang][Preprocessor] Handle the first pp-token in EnterMainSourceFile (PR #145244)

https://github.com/yronglin created https://github.com/llvm/llvm-project/pull/145244 Depends on [[clang][Preprocessor] Add peekNextPPToken, makes look ahead next token without side-effects](https://github.com/llvm/llvm-project/pull/143898). This PR fix the performance regression that introduce

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