Remove manual parsing of @PointerBounds macro

Also hack around EnumElementDecl not being handled in
getTypeOfReference, for now.

Author: hnrklssn

lib/ClangImporter/ImportDecl.cpp

@@ -8583,28 +8583,12 @@ void ClangImporter::Implementation::importBoundsAttributes(
   auto &sourceFile = getClangSwiftAttrSourceFile(
       *MappedDecl->getDeclContext()->getParentModule(), MacroString);
 
-  // Spin up a parser.
-  swift::Parser parser(sourceFile.getBufferID(), sourceFile,
-                       &SwiftContext.Diags, nullptr, nullptr);
-  // Prime the lexer.
-  parser.consumeTokenWithoutFeedingReceiver();
-
-  bool hadError = false;
-  assert(parser.Tok.is(tok::at_sign));
-  SourceLoc atEndLoc = parser.Tok.getRange().getEnd();
-  SourceLoc atLoc = parser.consumeToken(tok::at_sign);
-  DeclContext *DC = MappedDecl->getParent();
-  auto initContext = PatternBindingInitializer::create(DC);
-  hadError = parser
-                 .parseDeclAttribute(MappedDecl->getAttrs(), atLoc, atEndLoc,
-                                     initContext,
-                                     /*isFromClangAttribute=*/true)
-                 .isError();
-  if (hadError) {
-    HeaderLoc attrLoc(ClangDecl->getLocation());
-    diagnose(attrLoc, diag::clang_pointer_bounds_unhandled,
-             MappedDecl->getName(), MacroString);
-    return;
+  // Collect the attributes from the synthesized top-level declaration in
+  // the source file.
+  auto topLevelDecls = sourceFile.getTopLevelDecls();
+  for (auto decl : topLevelDecls) {
+    for (auto attr : decl->getAttrs())
+      MappedDecl->getAttrs().add(attr->clone(SwiftContext));
   }
 }
 

lib/Sema/TypeOfReference.cpp

@@ -977,6 +977,12 @@ ConstraintSystem::getTypeOfReference(ValueDecl *value,
     return { openedType, openedType, openedType, openedType, Type() };
   }
 
+  // FIXME: implement this properly
+  if (auto enumElem = dyn_cast<EnumElementDecl>(value)) {
+    Type interfaceType = enumElem->getInterfaceType();
+    return {interfaceType, interfaceType, interfaceType, interfaceType, Type()};
+  }
+
   // Only remaining case: unqualified reference to a property.
   auto *varDecl = cast<VarDecl>(value);