Flattener: Pull up children of children

oi/type_graph/Flattener.cpp

@@ -205,6 +205,13 @@ void Flattener::visit(Class& c) {
   for (const auto& child : c.children) {
     accept(child);
   }
+
+  // Pull in children from flattened children
+  // This may result in duplicates, but that shouldn't be a big deal
+  for (const Class& child : c.children) {
+    c.children.insert(c.children.end(), child.children.begin(),
+                      child.children.end());
+  }
 }
 
 void Flattener::visit(Container& c) {

oi/type_graph/Printer.cpp

@@ -204,7 +204,7 @@ void Printer::print_function(const Function& function) {
 void Printer::print_child(const Type& child) {
   depth_++;
   prefix();
-  out_ << "Child:" << std::endl;
+  out_ << "Child" << std::endl;
   print(child);
   depth_--;
 }

oi/type_graph/Types.h

@@ -235,7 +235,7 @@ class Class : public Type {
   std::vector<Parent> parents;  // Sorted by offset
   std::vector<Member> members;  // Sorted by offset
   std::vector<Function> functions;
-  std::vector<std::reference_wrapper<Type>>
+  std::vector<std::reference_wrapper<Class>>
       children;  // Only for dynamic classes
 
  private:

test/test_flattener.cpp

@@ -625,7 +625,7 @@ TEST(FlattenerTest, Children) {
 [0] Class: ClassB (size: 4)
       Member: b (offset: 0)
         Primitive: int32_t
-      Child:
+      Child
 [1]     Class: ClassA (size: 8)
           Member: b (offset: 0)
             Primitive: int32_t
@@ -665,13 +665,13 @@ TEST(FlattenerTest, ChildrenTwoDeep) {
 [0] Class: ClassD (size: 4)
       Member: d (offset: 0)
         Primitive: int32_t
-      Child:
+      Child
 [1]     Class: ClassB (size: 8)
           Member: d (offset: 0)
             Primitive: int32_t
           Member: b (offset: 4)
             Primitive: int32_t
-          Child:
+          Child
 [2]         Class: ClassA (size: 16)
               Member: d (offset: 0)
                 Primitive: int32_t
@@ -681,6 +681,8 @@ TEST(FlattenerTest, ChildrenTwoDeep) {
                 Primitive: int32_t
               Member: a (offset: 12)
                 Primitive: int32_t
+      Child
+        [2]
 )");
 }