[clang] [llvm] Added partial support for compiling C++20 modules and header-units without scanning. (PR #147682)

[Mehdi Amini via llvm-commits]

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joker-eph wrote:

Oh is this a third-party provided source-code? (I don't know if this file can have comments but that would be nice to document)

https://github.com/llvm/llvm-project/pull/147682