[PATCH] D83992: [ASTImporter] Add Visitor for TypedefNameDecl's

[Vince Bridgers via Phabricator via cfe-commits]

vabridgers created this revision.
vabridgers added a reviewer: martong.
Herald added subscribers: cfe-commits, teemperor, rnkovacs.
Herald added a reviewer: a.sidorin.
Herald added a project: clang.

We found a case where Typedef Name Declarations were not being added
correctly when importing builtin types. This exposed the need for a
TypedefNameDecl visitor so these types can be added by RecordDecl and
fields.

This code is covered by the ASTImporterTest cases that use the implicit
struct __NSConstantString_tag definitions.

Thanks to @martong for the debugging assist!

Depends on D83970 <https://reviews.llvm.org/D83970>.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D83992

Files:
  clang/lib/AST/ASTImporterLookupTable.cpp


Index: clang/lib/AST/ASTImporterLookupTable.cpp
===================================================================
--- clang/lib/AST/ASTImporterLookupTable.cpp
+++ clang/lib/AST/ASTImporterLookupTable.cpp
@@ -22,6 +22,20 @@
 struct Builder : RecursiveASTVisitor<Builder> {
   ASTImporterLookupTable <
   Builder(ASTImporterLookupTable &LT) : LT(LT) {}
+
+  bool VisitTypedefNameDecl(TypedefNameDecl *D) {
+    QualType Ty = D->getUnderlyingType();
+    Ty = Ty.getCanonicalType();
+    if (const auto *RTy = dyn_cast<RecordType>(Ty)) {
+      LT.add(RTy->getAsRecordDecl());
+      // iterate over the field decls, adding them
+      for (auto it : RTy->getAsRecordDecl()->fields()) {
+        LT.add(it);
+      }
+    }
+    return true;
+  }
+
   bool VisitNamedDecl(NamedDecl *D) {
     LT.add(D);
     return true;


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