a.sidorin added a comment.
Hello Takafumi,
Thank you for this patch! I feel positive about it. You can find my comments
inline.
================
Comment at: lib/AST/ASTImporter.cpp:5540
+ for(auto FromArg : E->getArgs()) {
+ TypeSourceInfo *ToTI = Importer.Import(FromArg);
+ ToArgVec.push_back(ToTI);
----------------
We should fail (`return nullptr`) if import fails and `ToTI` is `nullptr`.
================
Comment at: lib/AST/ASTImporter.cpp:5543
+ }
+ ArrayRef<TypeSourceInfo *> ToArgRef(ToArgVec);
+
----------------
No need to create an ArrayRef - SmallVector can be implicitly converted to it
so you can just pass SmallVector to the function.
================
Comment at: lib/AST/ASTImporter.cpp:5545
+
+ return TypeTraitExpr::Create( Importer.getToContext(),
+ ToType,
----------------
The style looks a bit broken. Could you clang-format?
================
Comment at: lib/AST/ASTImporter.cpp:5551
+ Importer.Import(E->getLocEnd()),
+ E->getValue());
+}
----------------
This will assert if E is value-dependent. You need to check it explicitly.
https://reviews.llvm.org/D39722
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