From 412b7710b7436cdd016fddf7941bd14901c4993a Mon Sep 17 00:00:00 2001
From: thecppzoo <thecppzoo@gmail.com>
Date: Tue, 24 Jun 2025 08:24:07 -0700
Subject: [PATCH 1/3] Create serialization.md

---
 .../serialization.md                          | 27 +++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 presentations/rust-traits-c++-on-sea-2025/serialization.md

diff --git a/presentations/rust-traits-c++-on-sea-2025/serialization.md b/presentations/rust-traits-c++-on-sea-2025/serialization.md
new file mode 100644
index 0000000..7edbe62
--- /dev/null
+++ b/presentations/rust-traits-c++-on-sea-2025/serialization.md
@@ -0,0 +1,27 @@
+## Example of subtyping as subclassing: Typical Serialization in C++
+
+```c++
+#include <ostringstream>
+
+// Infrastructure:
+namespace user {
+
+struct ISerialize {
+    virtual std::ostream &serialize(std::ostream &) const;
+    virtual std::size_t length() const;
+};
+
+template<typename T>
+struct SerializeWrapper: ISerialize {
+    T value_;
+    virtual std::ostream &serialize(std::ostream &to) const override {
+        return to << type_index(typeid(T)) << ':' << value_;
+    }
+    virtual std::size_t length() const {
+        std::ostream temporary;
+        serialize(temporary);
+        return temporary.str().length();
+    }
+};
+
+```

From a5c52748d8dfc38fb6929e554a912d907df607ba Mon Sep 17 00:00:00 2001
From: thecppzoo <thecppzoo@gmail.com>
Date: Tue, 24 Jun 2025 09:01:58 -0700
Subject: [PATCH 2/3] Update serialization.md

---
 .../rust-traits-c++-on-sea-2025/serialization.md | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/presentations/rust-traits-c++-on-sea-2025/serialization.md b/presentations/rust-traits-c++-on-sea-2025/serialization.md
index 7edbe62..f77b93f 100644
--- a/presentations/rust-traits-c++-on-sea-2025/serialization.md
+++ b/presentations/rust-traits-c++-on-sea-2025/serialization.md
@@ -1,11 +1,18 @@
 ## Example of subtyping as subclassing: Typical Serialization in C++
 
 ```c++
-#include <ostringstream>
+#include <sstream>
 
 // Infrastructure:
 namespace user {
 
+struct TypeRegistry {
+    template<typename T>
+    std::uint64_t id() const;
+};
+
+extern TypeRegistry g_registry;
+
 struct ISerialize {
     virtual std::ostream &serialize(std::ostream &) const;
     virtual std::size_t length() const;
@@ -15,13 +22,14 @@ template<typename T>
 struct SerializeWrapper: ISerialize {
     T value_;
     virtual std::ostream &serialize(std::ostream &to) const override {
-        return to << type_index(typeid(T)) << ':' << value_;
+        return
+            to << g_registry.id<T>() << ':' << value_;
     }
     virtual std::size_t length() const {
-        std::ostream temporary;
+        std::ostringstream temporary;
         serialize(temporary);
         return temporary.str().length();
     }
 };
-
 ```
+}```

From 1e57befceced7dc6ce745cbd5a76afdafa7d3e10 Mon Sep 17 00:00:00 2001
From: thecppzoo <thecppzoo@gmail.com>
Date: Tue, 24 Jun 2025 09:03:06 -0700
Subject: [PATCH 3/3] Update serialization.md

---
 presentations/rust-traits-c++-on-sea-2025/serialization.md | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/presentations/rust-traits-c++-on-sea-2025/serialization.md b/presentations/rust-traits-c++-on-sea-2025/serialization.md
index f77b93f..5aee853 100644
--- a/presentations/rust-traits-c++-on-sea-2025/serialization.md
+++ b/presentations/rust-traits-c++-on-sea-2025/serialization.md
@@ -31,5 +31,6 @@ struct SerializeWrapper: ISerialize {
         return temporary.str().length();
     }
 };
+
+}
 ```
-}```