[libc] [clang] [libcxx] [flang] [compiler-rt] [lldb] [llvm] [clang-tools-extra] ✨ [Sema, Lex, Parse] Preprocessor embed in C and C++ (and Obj-C and Obj-C++ by-proxy) (PR #68620)

[James Y Knight via cfe-commits]

jyknight wrote:

I guess I'd consider the "mental model" here to be that (notionally) `#embed` is preprocessed by expanding to `#embed_base64`, which is handled by the compiler proper, not the preprocessor. Yes, that's not entirely true in the implementation, but it seems like a reasonable way to think about it. (similar in feel to `#pragma` which is also not purely preprocessor, despite starting with `#`.)

https://github.com/llvm/llvm-project/pull/68620