rsmith accepted this revision.
rsmith added a comment.
This revision is now accepted and ready to land.

I'm (happily) surprised this required so few changes!



================
Comment at: clang/include/clang/Basic/LangOptions.h:690-691
+
+  /// The translation unit is a partial translation unit, growing 
incrementally.
+  TU_Partial
 };
----------------
I don't think this is clear enough about the difference between `TU_Prefix` and 
`TU_Partial`. I think the difference is:

* `TU_Prefix` is an incomplete prefix of a translation unit. Because it's not 
complete, we don't perform (most) finalization steps (eg, template 
instantiation) at the end.
* `TU_Partial` is a complete translation unit that we might nonetheless 
incrementally extend later. Because it is complete (and we might want to 
generate code for it), we do perform template instantiation, but because it 
might be extended later, we don't warn if it declares or uses undefined 
internal-linkage symbols.

I wonder if `TU_Incremental` would be a better name than `TU_Partial`.


Repository:
  rC Clang

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D104918/new/

https://reviews.llvm.org/D104918

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