[ASTImporter] Add import of MacroQualifiedType

[danix800]

Summary

Add import of MacroQualifiedType.

clang/lib/AST/ASTImporter.cpp

public:
     ExpectedType VisitElaboratedType(const ElaboratedType *T);
     ExpectedType VisitDependentNameType(const DependentNameType *T);
     ExpectedType VisitPackExpansionType(const PackExpansionType *T);
     ExpectedType VisitDependentTemplateSpecializationType(
         const DependentTemplateSpecializationType *T);
     ExpectedType VisitObjCInterfaceType(const ObjCInterfaceType *T);
     ExpectedType VisitObjCObjectType(const ObjCObjectType *T);
     ExpectedType VisitObjCObjectPointerType(const ObjCObjectPointerType *T);
+    ExpectedType VisitMacroQualifiedType(const MacroQualifiedType *T);
 
     // Importing declarations
     Error ImportDeclParts(NamedDecl *D, DeclarationName &Name, NamedDecl *&ToD,
                           SourceLocation &Loc);
     Error ImportDeclParts(
         NamedDecl *D, DeclContext *&DC, DeclContext *&LexicalDC,
         DeclarationName &Name, NamedDecl *&ToD, SourceLocation &Loc);
     Error ImportDefinitionIfNeeded(Decl *FromD, Decl *ToD = nullptr);

 ASTNodeImporter::VisitObjCObjectPointerType(const ObjCObjectPointerType *T) {
   ExpectedType ToPointeeTypeOrErr = import(T->getPointeeType());
   if (!ToPointeeTypeOrErr)
     return ToPointeeTypeOrErr.takeError();
 
   return Importer.getToContext().getObjCObjectPointerType(*ToPointeeTypeOrErr);
 }
 
+ExpectedType
+ASTNodeImporter::VisitMacroQualifiedType(const MacroQualifiedType *T) {
+  ExpectedType ToUnderlyingTypeOrErr = import(T->getUnderlyingType());
+  if (!ToUnderlyingTypeOrErr)
+    return ToUnderlyingTypeOrErr.takeError();
+
+  IdentifierInfo *ToIdentifier = Importer.Import(T->getMacroIdentifier());
+  return Importer.getToContext().getMacroQualifiedType(*ToUnderlyingTypeOrErr,
+                                                       ToIdentifier);
+}
+
 //----------------------------------------------------------------------------
 // Import Declarations
 //----------------------------------------------------------------------------
 Error ASTNodeImporter::ImportDeclParts(
     NamedDecl *D, DeclContext *&DC, DeclContext *&LexicalDC,
     DeclarationName &Name, NamedDecl *&ToD, SourceLocation &Loc) {
   // Check if RecordDecl is in FunctionDecl parameters to avoid infinite loop.
   // example: int struct_in_proto(struct data_t{int a;int b;} *d);

clang/unittests/AST/ASTImporterTest.cpp

QualType ToInjParmVar =
       ToF->parameters()[0]->getType().getDesugaredType(ToCtx);
   ToInjParmVar =
       ToInjParmVar->getAs<PointerType>()->getPointeeType().getCanonicalType();
   EXPECT_TRUE(isa<InjectedClassNameType>(ToInjTypedef));
   EXPECT_TRUE(isa<InjectedClassNameType>(ToInjParmVar));
   EXPECT_TRUE(ToCtx.hasSameType(ToInjTypedef, ToInjParmVar));
 }
 
+TEST_P(ASTImporterOptionSpecificTestBase, ImportMacroQualifiedType) {
+  Decl *From, *To;
+  std::tie(From, To) = getImportedDecl(
+      R"(
+        #define CDECL __attribute__((cdecl))
+        typedef void (CDECL *X)();
+      )",
+      Lang_CXX03, "", Lang_CXX03, "X");
+
+  auto *FromTy =
+      FirstDeclMatcher<MacroQualifiedType>().match(From, macroQualifiedType());
+  auto *ToTy =
+      FirstDeclMatcher<MacroQualifiedType>().match(To, macroQualifiedType());
+
+  EXPECT_TRUE(isa<AttributedType>(FromTy->getUnderlyingType()));
+  EXPECT_TRUE(isa<AttributedType>(ToTy->getUnderlyingType()));
+}
+
 TEST_P(ASTImporterOptionSpecificTestBase, ImportCorrectTemplateName) {
   constexpr auto TestCode = R"(
       template <class T>
       struct A;
       template <class T>
       struct A {};
       template <template<class> class T = A>
       struct B {};