[clang-tools-extra] [clangd] Replay macro definitions from preamble for clang-tidy checks (PR #202495)

[Aleksandr Platonov via cfe-commits]

ArcsinX wrote:

> Hello. I have completed the changes locally and verified them myself; could you please take a look? I'v changed `const MainFileMacros &Macros` to `MainFileMacros Macros` just like `Includes`.

Thanks. But this was just a question. maybe we can use a reference :)
If we use a copy, maybe you can provide some number about memory usage changes. E.g. at opening a heavy file like clang/lib/Sema/Sema.cpp with disabled background indexer, do we see any significant changes in memory usage with and without this patch?


Can you please fix formatting of your changes? You can use clang-format (or format feature of clangd) to do this.

https://github.com/llvm/llvm-project/pull/202495