From 2c243c3e41a5557d57bfd232893591d9e99f145e Mon Sep 17 00:00:00 2001
From: Martchus <martchus@gmx.net>
Date: Sun, 6 Jun 2021 15:06:55 +0200
Subject: [PATCH] WIP: Add marker macros for versioning

---
 generator/tests/morestructs.h | 16 ++++++++++++++++
 lib/CMakeLists.txt            |  2 +-
 lib/versioning.h              | 27 +++++++++++++++++++++++++++
 3 files changed, 44 insertions(+), 1 deletion(-)
 create mode 100644 lib/versioning.h

diff --git a/generator/tests/morestructs.h b/generator/tests/morestructs.h
index d355236..14cf3b6 100644
--- a/generator/tests/morestructs.h
+++ b/generator/tests/morestructs.h
@@ -1,8 +1,11 @@
 #ifndef REFLECTIVE_RAPIDJSON_TESTS_MORE_STRUCTS_H
 #define REFLECTIVE_RAPIDJSON_TESTS_MORE_STRUCTS_H
 
+#define REFLECTIVE_RAPIDJSON_SHORT_MACROS
+
 #include "../../lib/binary/serializable.h"
 #include "../../lib/json/serializable.h"
+#include "../../lib/versioning.h"
 
 using namespace std;
 using namespace ReflectiveRapidJSON;
@@ -67,4 +70,17 @@ struct PointerStruct : public BinarySerializable<PointerStruct> {
     std::shared_ptr<PointerTarget> s3;
 };
 
+/*!
+ * \brief The PointerStruct struct is used to test the behavior of the binary (de)serialization with smart pointer.
+ */
+struct VersionedStruct : public BinarySerializable<VersionedStruct> {
+    std::uint32_t a, b;
+
+until_version(2):
+    std::uint32_t c, d;
+
+as_of_version(3):
+    std::uint32_t e, f;
+};
+
 #endif // REFLECTIVE_RAPIDJSON_TESTS_MORE_STRUCTS_H
diff --git a/lib/CMakeLists.txt b/lib/CMakeLists.txt
index f555b2a..7ff73cb 100644
--- a/lib/CMakeLists.txt
+++ b/lib/CMakeLists.txt
@@ -5,7 +5,7 @@ set(META_PROJECT_TYPE library)
 set(META_HEADER_ONLY_LIB ON)
 
 # add project files
-set(HEADER_FILES traits.h)
+set(HEADER_FILES traits.h versioning.h)
 set(SRC_FILES)
 set(TEST_HEADER_FILES)
 set(TEST_SRC_FILES)
diff --git a/lib/versioning.h b/lib/versioning.h
new file mode 100644
index 0000000..13019ae
--- /dev/null
+++ b/lib/versioning.h
@@ -0,0 +1,27 @@
+#ifndef REFLECTIVE_RAPIDJSON_VERSIONING
+#define REFLECTIVE_RAPIDJSON_VERSIONING
+
+namespace ReflectiveRapidJSON {
+
+#ifdef REFLECTIVE_RAPIDJSON_GENERATOR
+#define REFLECTIVE_RAPIDJSON_CAT_1(a, b) a##b
+#define REFLECTIVE_RAPIDJSON_CAT_2(a, b) REFLECTIVE_RAPIDJSON_CAT_1(a, b)
+#define REFLECTIVE_RAPIDJSON_AS_OF_VERSION(version) \
+    constexpr std::size_t REFLECTIVE_RAPIDJSON_CAT_2(rrjAsOfVersion, __COUNTER__) = version; \
+    public
+#define REFLECTIVE_RAPIDJSON_UNTIL_VERSION(version) \
+    constexpr std::size_t REFLECTIVE_RAPIDJSON_CAT_2(rrjUntilVersion, __COUNTER__) = version; \
+    public
+#else
+#define REFLECTIVE_RAPIDJSON_AS_OF_VERSION(version) public
+#define REFLECTIVE_RAPIDJSON_UNTIL_VERSION(version) public
+#endif
+
+#ifdef REFLECTIVE_RAPIDJSON_SHORT_MACROS
+#define as_of_version(version) REFLECTIVE_RAPIDJSON_AS_OF_VERSION(version)
+#define until_version(version) REFLECTIVE_RAPIDJSON_UNTIL_VERSION(version)
+#endif
+
+} // namespace ReflectiveRapidJSON
+
+#endif // REFLECTIVE_RAPIDJSON_TRAITS