ChuanqiXu added inline comments.
================
Comment at: clang/docs/CPlusPlus20Modules.rst:377-393
+ │ │
│ │
+ ├───────────── frontend ─────────────┼───────────────────────── middle end
──────────────────────┼─────────── backend ────────────┤
+ │ │
│ │
+ └─── parsing ──── sema ──── codegen ──┴─── optimizations ─── IPO ───
optimizations ─── codegen ───┴─── optimizations ─── codegen ──┘
+
+
┌───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┐
+ │
│
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I'm not sure if this could be rendered properly, if there is any suggestion?
================
Comment at: clang/docs/CPlusPlus20Modules.rst:585-587
+But according to [cpp.import](http://eel.is/c++draft/cpp.import#5),
+the import of header unit should export undefinition too.
+So the expected result of using header units here should be ``"Not defined."``.
----------------
@iains maybe we need to double check on this. I also filed an issue:
https://github.com/llvm/llvm-project/issues/56899. My reading for
`[cpp.import]p5` is `the point of undefinition` is also a macro definition, so
we should emit it. But I maybe wrong.
If I am wrong, I wish we could get an example to show differences (If any)
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D131062/new/
https://reviews.llvm.org/D131062
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