bruno requested changes to this revision.
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> It would be nice to have some mechanism to notify developers that includes 
> are still performed regardless of requires

I'd like to see a module remark for whenever a match fails 
`-Rmodule-requires-fail` or something like that. I've been bitten before by a 
regular submodule `requires` not triggering, just to find out some specific 
subfeature was missing in the compiler invocation - it can take a while to spot 
that. Doesn't need to be a blocker for getting this in though.



================
Comment at: clang/docs/Modules.rst:657
+    }
+  }
+
----------------
Nice doc and examples!


================
Comment at: clang/include/clang/Basic/DiagnosticLexKinds.td:723
+  "invalid requires declaration outside of a module declaration, did you mean"
+  " to add '{' to open a requires block?">;
 def err_mmap_expected_rbrace : Error<"expected '}'">;
----------------
I'm not really too worried about a fixit here, but it would be nice if the "did 
you mean..." part came out of a note instead.


================
Comment at: clang/lib/Lex/ModuleMap.cpp:2355
+        parseModuleMembers();
+      }
+    }
----------------
Too many curly braces?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D118311/new/

https://reviews.llvm.org/D118311

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