Added Ref and Ptr schema types

1 files changed, 29 insertions, 5 deletions

diff --git a/modules/codec/c++/schema.hpp b/modules/codec/c++/schema.hpp
index 6a69425..d3c4616 100644
--- a/modules/codec/c++/schema.hpp
+++ b/modules/codec/c++/schema.hpp
@@ -17,10 +17,10 @@ namespace schema {
  */
 struct Void {};
 
-template <typename T, string_literal Literal> struct Member {
+template <typename Schema, string_literal Literal> struct Member {
 	static constexpr string_literal name = "Member";
 
-	using ValueType = T;
+	using ValueType = Schema;
 	static constexpr string_literal KeyLiteral = Literal;
 };
 
@@ -30,8 +30,8 @@ template <typename... T> struct Struct {
 		"This schema template doesn't support this type of template argument");
 };
 
-template <typename... V, string_literal... K>
-struct Struct<Member<V, K>...> {
+template <typename... Schema, string_literal... Key>
+struct Struct<Member<Schema, Key>...> {
 	static constexpr string_literal name = "Struct";
 };
 
@@ -68,11 +68,35 @@ template <typename... T> struct Tuple {
  *
  * data<WrappedExample, encode::Json> ex_data;
  */
-template <typename T, typename Enc>
+template <typename Schema, typename Enc>
 class Wrapper {
 	static constexpr string_literal name = "Wrapper";
 };
 
+/**
+ * The schema version of ref<T>.
+ * See the Ptr<T> comment on this.
+ */
+template<typename Schema>
+class Ref {
+	static constexpr string_literal name = "Ref";
+};
+
+/**
+ * The schema version of ptr<T>
+ * It has the advantage that if used in the data class
+ * it won't change the interface of the data instance.
+ * Meaning that data<Ptr<UInt64>> acts as if it's data<UInt64>
+ * in terms of arithmetic operations. It's mostly useful for arrays of primitive types.
+ * In cases where Array<Float64> should be translated to a double*.
+ * In that case we still want the data class as an accesor on the array, so we provide the
+ * data<Ptr<Float64>> type.
+ */
+template<typename Schema>
+class Ptr {
+	static constexpr string_literal name = "Ptr";
+};
+
 struct String {
 	static constexpr string_literal name = "String";
 };