From 066af00eebe662e5a589a4e274e1613201b36982 Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Thu, 2 Jul 2026 09:57:35 +0100
Subject: Support translating sums into Rust types

---
 examples/02-sum/hobgoblin.json5                 |  4 ++++
 examples/02-sum/output/rust/.gitignore          |  1 +
 examples/02-sum/output/rust/Cargo.lock          |  7 +++++++
 examples/02-sum/output/rust/Cargo.toml          |  6 ++++++
 examples/02-sum/output/rust/rust-toolchain.toml |  2 ++
 examples/02-sum/output/rust/src/main.rs         | 16 ++++++++++++++++
 examples/02-sum/output/rust/src/shapes.rs       | 15 +++++++++++++++
 7 files changed, 51 insertions(+)
 create mode 100644 examples/02-sum/output/rust/.gitignore
 create mode 100644 examples/02-sum/output/rust/Cargo.lock
 create mode 100644 examples/02-sum/output/rust/Cargo.toml
 create mode 100644 examples/02-sum/output/rust/rust-toolchain.toml
 create mode 100644 examples/02-sum/output/rust/src/main.rs
 create mode 100644 examples/02-sum/output/rust/src/shapes.rs

(limited to 'examples/02-sum')

diff --git a/examples/02-sum/hobgoblin.json5 b/examples/02-sum/hobgoblin.json5
index 1ec9568..2bf59c3 100644
--- a/examples/02-sum/hobgoblin.json5
+++ b/examples/02-sum/hobgoblin.json5
@@ -5,5 +5,9 @@
       path: "output/java/src/gen/java",
       packageName: "org.zwobble.example.types"
     },
+    {
+      generator: "rust-types",
+      path: "output/rust/src",
+    },
   ],
 }
diff --git a/examples/02-sum/output/rust/.gitignore b/examples/02-sum/output/rust/.gitignore
new file mode 100644
index 0000000..ea8c4bf
--- /dev/null
+++ b/examples/02-sum/output/rust/.gitignore
@@ -0,0 +1 @@
+/target
diff --git a/examples/02-sum/output/rust/Cargo.lock b/examples/02-sum/output/rust/Cargo.lock
new file mode 100644
index 0000000..9dc6e3e
--- /dev/null
+++ b/examples/02-sum/output/rust/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "example"
+version = "0.1.0"
diff --git a/examples/02-sum/output/rust/Cargo.toml b/examples/02-sum/output/rust/Cargo.toml
new file mode 100644
index 0000000..5d4c622
--- /dev/null
+++ b/examples/02-sum/output/rust/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "example"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
diff --git a/examples/02-sum/output/rust/rust-toolchain.toml b/examples/02-sum/output/rust/rust-toolchain.toml
new file mode 100644
index 0000000..4fedb95
--- /dev/null
+++ b/examples/02-sum/output/rust/rust-toolchain.toml
@@ -0,0 +1,2 @@
+[toolchain]
+channel = "1.96"
diff --git a/examples/02-sum/output/rust/src/main.rs b/examples/02-sum/output/rust/src/main.rs
new file mode 100644
index 0000000..010ea2a
--- /dev/null
+++ b/examples/02-sum/output/rust/src/main.rs
@@ -0,0 +1,16 @@
+mod shapes;
+
+use shapes::{Rectangle, Shape, Triangle};
+
+fn main() {
+    let shape = create_shape();
+
+    let area = match shape {
+        Shape::Rectangle(rectangle) => rectangle.width * rectangle.height,
+        Shape::Triangle(triangle) => triangle.width * triangle.height / 2,
+    };
+}
+
+fn create_shape() -> Shape {
+    Shape::Rectangle(Rectangle { width: 10, height: 25 })
+}
diff --git a/examples/02-sum/output/rust/src/shapes.rs b/examples/02-sum/output/rust/src/shapes.rs
new file mode 100644
index 0000000..9bb32f4
--- /dev/null
+++ b/examples/02-sum/output/rust/src/shapes.rs
@@ -0,0 +1,15 @@
+/// A 2D shape.
+pub enum Shape {
+    Rectangle(crate::shapes::Rectangle),
+    Triangle(crate::shapes::Triangle),
+}
+
+pub struct Rectangle {
+    pub width: i32,
+    pub height: i32,
+}
+
+pub struct Triangle {
+    pub width: i32,
+    pub height: i32,
+}
-- 
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