[nfc][cxx-interop] Fix a few tests.

Author: zoecarver

test/Interop/Cxx/class/Inputs/type-classification.h

@@ -232,6 +232,7 @@ struct __attribute__((swift_attr("import_iterator"))) Iterator {
 };
 
 struct HasMethodThatReturnsIterator {
+  HasMethodThatReturnsIterator(const HasMethodThatReturnsIterator&);
   Iterator getIterator() const;
 };
 
@@ -240,6 +241,7 @@ struct IteratorBox {
 };
 
 struct HasMethodThatReturnsIteratorBox {
+  HasMethodThatReturnsIteratorBox(const HasMethodThatReturnsIteratorBox&);
   IteratorBox getIteratorBox() const;
 };
 

test/Interop/Cxx/stdlib/overlay/Inputs/custom-sequence.h

@@ -108,4 +108,31 @@ struct HasTemplatedIterator {
 
 typedef HasTemplatedIterator<int> HasUninstantiatableIterator;
 
-#endif // TEST_INTEROP_CXX_STDLIB_INPUTS_CUSTOM_SEQUENCE_H
+struct HasInheritedConstIterator {
+private:
+  InheritedConstIterator b = InheritedConstIterator(1);
+  InheritedConstIterator e = InheritedConstIterator(6);
+
+public:
+  InheritedConstIterator begin() const { return b; }
+  InheritedConstIterator end() const { return e; }
+};
+
+template <typename T>
+struct HasInheritedTemplatedConstIterator {
+public:
+  typedef InheritedTemplatedConstIterator<int> iterator;
+
+private:
+  iterator b = iterator(1);
+  iterator e = iterator(7);
+
+public:
+  iterator begin() const { return b; }
+  iterator end() const { return e; }
+};
+
+typedef HasInheritedTemplatedConstIterator<int>
+    HasInheritedTemplatedConstIteratorInt;
+
+#endif // TEST_INTEROP_CXX_STDLIB_INPUTS_CUSTOM_SEQUENCE_H