143 files changed, 111 insertions, 1 deletions
diff --git a/examples/10-shared/hobgoblin.json5 b/examples/04-box/hobgoblin.json5
index 19e0f93..19e0f93 100644
--- a/examples/10-shared/hobgoblin.json5
+++ b/examples/04-box/hobgoblin.json5
diff --git a/examples/04-inductive-data-types/output/java/.gitignore b/examples/04-box/output/java/.gitignore
index ff511d4..ff511d4 100644
--- a/examples/04-inductive-data-types/output/java/.gitignore
+++ b/examples/04-box/output/java/.gitignore
diff --git a/examples/04-inductive-data-types/output/java/pom.xml b/examples/04-box/output/java/pom.xml
index 445fa65..445fa65 120000
--- a/examples/04-inductive-data-types/output/java/pom.xml
+++ b/examples/04-box/output/java/pom.xml
diff --git a/examples/04-box/output/java/src/test/java/org/zwobble/example/PointTests.java b/examples/04-box/output/java/src/test/java/org/zwobble/example/PointTests.java
new file mode 100644
index 0000000..16f3c62
--- /dev/null
+++ b/examples/04-box/output/java/src/test/java/org/zwobble/example/PointTests.java
@@ -0,0 +1,16 @@
+package org.zwobble.example;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import org.junit.jupiter.api.Test;
+import org.zwobble.example.types.point.Line;
+import org.zwobble.example.types.point.Point;
+
+public class PointTests {
+    @Test
+    public void lineFields() {
+        var line = new Line(
+            new Point(10, 25),
+            new Point(42, 47)
+        );
+    }
+}
diff --git a/examples/04-inductive-data-types/output/rust/.gitignore b/examples/04-box/output/rust/.gitignore
index ea8c4bf..ea8c4bf 100644
--- a/examples/04-inductive-data-types/output/rust/.gitignore
+++ b/examples/04-box/output/rust/.gitignore
diff --git a/examples/04-inductive-data-types/output/rust/Cargo.lock b/examples/04-box/output/rust/Cargo.lock
index 9dc6e3e..9dc6e3e 100644
--- a/examples/04-inductive-data-types/output/rust/Cargo.lock
+++ b/examples/04-box/output/rust/Cargo.lock
diff --git a/examples/04-inductive-data-types/output/rust/Cargo.toml b/examples/04-box/output/rust/Cargo.toml
index 5d4c622..5d4c622 100644
--- a/examples/04-inductive-data-types/output/rust/Cargo.toml
+++ b/examples/04-box/output/rust/Cargo.toml
diff --git a/examples/04-inductive-data-types/output/rust/rust-toolchain.toml b/examples/04-box/output/rust/rust-toolchain.toml
index 4fedb95..4fedb95 100644
--- a/examples/04-inductive-data-types/output/rust/rust-toolchain.toml
+++ b/examples/04-box/output/rust/rust-toolchain.toml
diff --git a/examples/04-box/output/rust/src/lib.rs b/examples/04-box/output/rust/src/lib.rs
new file mode 100644
index 0000000..a324869
--- /dev/null
+++ b/examples/04-box/output/rust/src/lib.rs
@@ -0,0 +1,14 @@
+mod point;
+
+#[cfg(test)]
+mod test {
+    use super::point::{Line, Point};
+
+    #[test]
+    fn line_fields() {
+        let line = Line {
+            start: Box::new(Point { x: 10, y: 25 }),
+            end: Box::new(Point { x: 42, y: 47 }),
+        };
+    }
+}
diff --git a/examples/04-box/output/rust/src/point.rs b/examples/04-box/output/rust/src/point.rs
new file mode 100644
index 0000000..9629fc1
--- /dev/null
+++ b/examples/04-box/output/rust/src/point.rs
@@ -0,0 +1,15 @@
+// Generated by hobgoblin.
+
+/// A straight line from one point to another.
+#[derive(Clone, Debug, Hash, PartialEq)]
+pub struct Line {
+    pub start: ::std::boxed::Box::<crate::point::Point>,
+    pub end: ::std::boxed::Box::<crate::point::Point>,
+}
+
+/// A 2D point.
+#[derive(Clone, Debug, Hash, PartialEq)]
+pub struct Point {
+    pub x: ::core::primitive::i32,
+    pub y: ::core::primitive::i32,
+}
diff --git a/examples/04-box/src/point.hob b/examples/04-box/src/point.hob
new file mode 100644
index 0000000..ba9fa89
--- /dev/null
+++ b/examples/04-box/src/point.hob
@@ -0,0 +1,11 @@
+/// A straight line from one point to another.
+struct Line {
+    field start: Box[Point];
+    field end: Box[Point];
+}
+
+/// A 2D point.
+struct Point {
+    field x: Int32;
+    field y: Int32;
+}
diff --git a/examples/04-inductive-data-types/hobgoblin.json5 b/examples/05-inductive-data-types/hobgoblin.json5
index 12713d4..12713d4 100644
--- a/examples/04-inductive-data-types/hobgoblin.json5
+++ b/examples/05-inductive-data-types/hobgoblin.json5
diff --git a/examples/05-inductive-data-types-separate-namespaces/output/java/.gitignore b/examples/05-inductive-data-types/output/java/.gitignore
index ff511d4..ff511d4 100644
--- a/examples/05-inductive-data-types-separate-namespaces/output/java/.gitignore
+++ b/examples/05-inductive-data-types/output/java/.gitignore
diff --git a/examples/05-inductive-data-types-separate-namespaces/output/java/pom.xml b/examples/05-inductive-data-types/output/java/pom.xml
index 445fa65..445fa65 120000
--- a/examples/05-inductive-data-types-separate-namespaces/output/java/pom.xml
+++ b/examples/05-inductive-data-types/output/java/pom.xml
diff --git a/examples/04-inductive-data-types/output/java/src/main/java/org/zwobble/example/Arithmetic.java b/examples/05-inductive-data-types/output/java/src/main/java/org/zwobble/example/Arithmetic.java
index 08cb75c..08cb75c 100644
--- a/examples/04-inductive-data-types/output/java/src/main/java/org/zwobble/example/Arithmetic.java
+++ b/examples/05-inductive-data-types/output/java/src/main/java/org/zwobble/example/Arithmetic.java
diff --git a/examples/04-inductive-data-types/output/java/src/test/java/org/zwobble/example/ArithmeticTests.java b/examples/05-inductive-data-types/output/java/src/test/java/org/zwobble/example/ArithmeticTests.java
index cd4fdd0..cd4fdd0 100644
--- a/examples/04-inductive-data-types/output/java/src/test/java/org/zwobble/example/ArithmeticTests.java
+++ b/examples/05-inductive-data-types/output/java/src/test/java/org/zwobble/example/ArithmeticTests.java
diff --git a/examples/05-inductive-data-types-separate-namespaces/output/rust/.gitignore b/examples/05-inductive-data-types/output/rust/.gitignore
index ea8c4bf..ea8c4bf 100644
--- a/examples/05-inductive-data-types-separate-namespaces/output/rust/.gitignore
+++ b/examples/05-inductive-data-types/output/rust/.gitignore
diff --git a/examples/05-inductive-data-types-separate-namespaces/output/rust/Cargo.lock b/examples/05-inductive-data-types/output/rust/Cargo.lock
index 9dc6e3e..9dc6e3e 100644
--- a/examples/05-inductive-data-types-separate-namespaces/output/rust/Cargo.lock
+++ b/examples/05-inductive-data-types/output/rust/Cargo.lock
diff --git a/examples/05-inductive-data-types-separate-namespaces/output/rust/Cargo.toml b/examples/05-inductive-data-types/output/rust/Cargo.toml
index 5d4c622..5d4c622 100644
--- a/examples/05-inductive-data-types-separate-namespaces/output/rust/Cargo.toml
+++ b/examples/05-inductive-data-types/output/rust/Cargo.toml
diff --git a/examples/05-inductive-data-types-separate-namespaces/output/rust/rust-toolchain.toml b/examples/05-inductive-data-types/output/rust/rust-toolchain.toml
index 4fedb95..4fedb95 100644
--- a/examples/05-inductive-data-types-separate-namespaces/output/rust/rust-toolchain.toml
+++ b/examples/05-inductive-data-types/output/rust/rust-toolchain.toml
diff --git a/examples/04-inductive-data-types/output/rust/src/arithmetic.rs b/examples/05-inductive-data-types/output/rust/src/arithmetic.rs
index 248d2c1..248d2c1 100644
--- a/examples/04-inductive-data-types/output/rust/src/arithmetic.rs
+++ b/examples/05-inductive-data-types/output/rust/src/arithmetic.rs
diff --git a/examples/04-inductive-data-types/output/rust/src/lib.rs b/examples/05-inductive-data-types/output/rust/src/lib.rs
index 3265e69..3265e69 100644
--- a/examples/04-inductive-data-types/output/rust/src/lib.rs
+++ b/examples/05-inductive-data-types/output/rust/src/lib.rs
diff --git a/examples/04-inductive-data-types/src/arithmetic.hob b/examples/05-inductive-data-types/src/arithmetic.hob
index b1ef6e5..b1ef6e5 100644
--- a/examples/04-inductive-data-types/src/arithmetic.hob
+++ b/examples/05-inductive-data-types/src/arithmetic.hob
diff --git a/examples/05-inductive-data-types-separate-namespaces/hobgoblin.json5 b/examples/06-inductive-data-types-separate-namespaces/hobgoblin.json5
index 12713d4..12713d4 100644
--- a/examples/05-inductive-data-types-separate-namespaces/hobgoblin.json5
+++ b/examples/06-inductive-data-types-separate-namespaces/hobgoblin.json5
diff --git a/examples/06-enum/output/java/.gitignore b/examples/06-inductive-data-types-separate-namespaces/output/java/.gitignore
index ff511d4..ff511d4 100644
--- a/examples/06-enum/output/java/.gitignore
+++ b/examples/06-inductive-data-types-separate-namespaces/output/java/.gitignore
diff --git a/examples/06-enum/output/java/pom.xml b/examples/06-inductive-data-types-separate-namespaces/output/java/pom.xml
index 445fa65..445fa65 120000
--- a/examples/06-enum/output/java/pom.xml
+++ b/examples/06-inductive-data-types-separate-namespaces/output/java/pom.xml
diff --git a/examples/05-inductive-data-types-separate-namespaces/output/java/src/test/java/org/zwobble/example/DataTests.java b/examples/06-inductive-data-types-separate-namespaces/output/java/src/test/java/org/zwobble/example/DataTests.java
index f01bf0a..f01bf0a 100644
--- a/examples/05-inductive-data-types-separate-namespaces/output/java/src/test/java/org/zwobble/example/DataTests.java
+++ b/examples/06-inductive-data-types-separate-namespaces/output/java/src/test/java/org/zwobble/example/DataTests.java
diff --git a/examples/06-enum/output/rust/.gitignore b/examples/06-inductive-data-types-separate-namespaces/output/rust/.gitignore
index ea8c4bf..ea8c4bf 100644
--- a/examples/06-enum/output/rust/.gitignore
+++ b/examples/06-inductive-data-types-separate-namespaces/output/rust/.gitignore
diff --git a/examples/06-enum/output/rust/Cargo.lock b/examples/06-inductive-data-types-separate-namespaces/output/rust/Cargo.lock
index 9dc6e3e..9dc6e3e 100644
--- a/examples/06-enum/output/rust/Cargo.lock
+++ b/examples/06-inductive-data-types-separate-namespaces/output/rust/Cargo.lock
diff --git a/examples/06-enum/output/rust/Cargo.toml b/examples/06-inductive-data-types-separate-namespaces/output/rust/Cargo.toml
index 5d4c622..5d4c622 100644
--- a/examples/06-enum/output/rust/Cargo.toml
+++ b/examples/06-inductive-data-types-separate-namespaces/output/rust/Cargo.toml
diff --git a/examples/06-enum/output/rust/rust-toolchain.toml b/examples/06-inductive-data-types-separate-namespaces/output/rust/rust-toolchain.toml
index 4fedb95..4fedb95 100644
--- a/examples/06-enum/output/rust/rust-toolchain.toml
+++ b/examples/06-inductive-data-types-separate-namespaces/output/rust/rust-toolchain.toml
diff --git a/examples/05-inductive-data-types-separate-namespaces/output/rust/src/data/a.rs b/examples/06-inductive-data-types-separate-namespaces/output/rust/src/data/a.rs
index 1ec823f..1ec823f 100644
--- a/examples/05-inductive-data-types-separate-namespaces/output/rust/src/data/a.rs
+++ b/examples/06-inductive-data-types-separate-namespaces/output/rust/src/data/a.rs
diff --git a/examples/05-inductive-data-types-separate-namespaces/output/rust/src/data/b.rs b/examples/06-inductive-data-types-separate-namespaces/output/rust/src/data/b.rs
index 38bf8fc..38bf8fc 100644
--- a/examples/05-inductive-data-types-separate-namespaces/output/rust/src/data/b.rs
+++ b/examples/06-inductive-data-types-separate-namespaces/output/rust/src/data/b.rs
diff --git a/examples/05-inductive-data-types-separate-namespaces/output/rust/src/data/mod.rs b/examples/06-inductive-data-types-separate-namespaces/output/rust/src/data/mod.rs
index 677af14..677af14 100644
--- a/examples/05-inductive-data-types-separate-namespaces/output/rust/src/data/mod.rs
+++ b/examples/06-inductive-data-types-separate-namespaces/output/rust/src/data/mod.rs
diff --git a/examples/05-inductive-data-types-separate-namespaces/output/rust/src/lib.rs b/examples/06-inductive-data-types-separate-namespaces/output/rust/src/lib.rs
index 01aaddf..01aaddf 100644
--- a/examples/05-inductive-data-types-separate-namespaces/output/rust/src/lib.rs
+++ b/examples/06-inductive-data-types-separate-namespaces/output/rust/src/lib.rs
diff --git a/examples/05-inductive-data-types-separate-namespaces/src/data/a.hob b/examples/06-inductive-data-types-separate-namespaces/src/data/a.hob
index 47f1d3c..47f1d3c 100644
--- a/examples/05-inductive-data-types-separate-namespaces/src/data/a.hob
+++ b/examples/06-inductive-data-types-separate-namespaces/src/data/a.hob
diff --git a/examples/05-inductive-data-types-separate-namespaces/src/data/b.hob b/examples/06-inductive-data-types-separate-namespaces/src/data/b.hob
index 4d538fc..4d538fc 100644
--- a/examples/05-inductive-data-types-separate-namespaces/src/data/b.hob
+++ b/examples/06-inductive-data-types-separate-namespaces/src/data/b.hob
diff --git a/examples/06-enum/hobgoblin.json5 b/examples/07-enum/hobgoblin.json5
index 12713d4..12713d4 100644
--- a/examples/06-enum/hobgoblin.json5
+++ b/examples/07-enum/hobgoblin.json5
diff --git a/examples/07-list/output/java/.gitignore b/examples/07-enum/output/java/.gitignore
index ff511d4..ff511d4 100644
--- a/examples/07-list/output/java/.gitignore
+++ b/examples/07-enum/output/java/.gitignore
diff --git a/examples/07-list/output/java/pom.xml b/examples/07-enum/output/java/pom.xml
index 445fa65..445fa65 120000
--- a/examples/07-list/output/java/pom.xml
+++ b/examples/07-enum/output/java/pom.xml
diff --git a/examples/06-enum/output/java/src/main/java/org/zwobble/example/Numbers.java b/examples/07-enum/output/java/src/main/java/org/zwobble/example/Numbers.java
index fc17869..fc17869 100644
--- a/examples/06-enum/output/java/src/main/java/org/zwobble/example/Numbers.java
+++ b/examples/07-enum/output/java/src/main/java/org/zwobble/example/Numbers.java
diff --git a/examples/06-enum/output/java/src/test/java/org/zwobble/example/NumbersTests.java b/examples/07-enum/output/java/src/test/java/org/zwobble/example/NumbersTests.java
index 141d5d1..141d5d1 100644
--- a/examples/06-enum/output/java/src/test/java/org/zwobble/example/NumbersTests.java
+++ b/examples/07-enum/output/java/src/test/java/org/zwobble/example/NumbersTests.java
diff --git a/examples/07-list/output/rust/.gitignore b/examples/07-enum/output/rust/.gitignore
index ea8c4bf..ea8c4bf 100644
--- a/examples/07-list/output/rust/.gitignore
+++ b/examples/07-enum/output/rust/.gitignore
diff --git a/examples/07-list/output/rust/Cargo.lock b/examples/07-enum/output/rust/Cargo.lock
index 9dc6e3e..9dc6e3e 100644
--- a/examples/07-list/output/rust/Cargo.lock
+++ b/examples/07-enum/output/rust/Cargo.lock
diff --git a/examples/07-list/output/rust/Cargo.toml b/examples/07-enum/output/rust/Cargo.toml
index 5d4c622..5d4c622 100644
--- a/examples/07-list/output/rust/Cargo.toml
+++ b/examples/07-enum/output/rust/Cargo.toml
diff --git a/examples/07-list/output/rust/rust-toolchain.toml b/examples/07-enum/output/rust/rust-toolchain.toml
index 4fedb95..4fedb95 100644
--- a/examples/07-list/output/rust/rust-toolchain.toml
+++ b/examples/07-enum/output/rust/rust-toolchain.toml
diff --git a/examples/06-enum/output/rust/src/lib.rs b/examples/07-enum/output/rust/src/lib.rs
index ae0b67c..ae0b67c 100644
--- a/examples/06-enum/output/rust/src/lib.rs
+++ b/examples/07-enum/output/rust/src/lib.rs
diff --git a/examples/06-enum/output/rust/src/numbers.rs b/examples/07-enum/output/rust/src/numbers.rs
index 29483ba..29483ba 100644
--- a/examples/06-enum/output/rust/src/numbers.rs
+++ b/examples/07-enum/output/rust/src/numbers.rs
diff --git a/examples/06-enum/src/numbers.hob b/examples/07-enum/src/numbers.hob
index 125082d..125082d 100644
--- a/examples/06-enum/src/numbers.hob
+++ b/examples/07-enum/src/numbers.hob
diff --git a/examples/07-list/hobgoblin.json5 b/examples/08-list/hobgoblin.json5
index 12713d4..12713d4 100644
--- a/examples/07-list/hobgoblin.json5
+++ b/examples/08-list/hobgoblin.json5
diff --git a/examples/08-native-type/output/java/.gitignore b/examples/08-list/output/java/.gitignore
index ff511d4..ff511d4 100644
--- a/examples/08-native-type/output/java/.gitignore
+++ b/examples/08-list/output/java/.gitignore
diff --git a/examples/08-native-type/output/java/pom.xml b/examples/08-list/output/java/pom.xml
index 445fa65..445fa65 120000
--- a/examples/08-native-type/output/java/pom.xml
+++ b/examples/08-list/output/java/pom.xml
diff --git a/examples/07-list/output/java/src/test/java/org/zwobble/example/PointTests.java b/examples/08-list/output/java/src/test/java/org/zwobble/example/PointTests.java
index e1528b5..e1528b5 100644
--- a/examples/07-list/output/java/src/test/java/org/zwobble/example/PointTests.java
+++ b/examples/08-list/output/java/src/test/java/org/zwobble/example/PointTests.java
diff --git a/examples/08-native-type/output/rust/.gitignore b/examples/08-list/output/rust/.gitignore
index ea8c4bf..ea8c4bf 100644
--- a/examples/08-native-type/output/rust/.gitignore
+++ b/examples/08-list/output/rust/.gitignore
diff --git a/examples/08-native-type/output/rust/Cargo.lock b/examples/08-list/output/rust/Cargo.lock
index 9dc6e3e..9dc6e3e 100644
--- a/examples/08-native-type/output/rust/Cargo.lock
+++ b/examples/08-list/output/rust/Cargo.lock
diff --git a/examples/08-native-type/output/rust/Cargo.toml b/examples/08-list/output/rust/Cargo.toml
index 5d4c622..5d4c622 100644
--- a/examples/08-native-type/output/rust/Cargo.toml
+++ b/examples/08-list/output/rust/Cargo.toml
diff --git a/examples/08-native-type/output/rust/rust-toolchain.toml b/examples/08-list/output/rust/rust-toolchain.toml
index 4fedb95..4fedb95 100644
--- a/examples/08-native-type/output/rust/rust-toolchain.toml
+++ b/examples/08-list/output/rust/rust-toolchain.toml
diff --git a/examples/07-list/output/rust/src/lib.rs b/examples/08-list/output/rust/src/lib.rs
index 907ab8b..907ab8b 100644
--- a/examples/07-list/output/rust/src/lib.rs
+++ b/examples/08-list/output/rust/src/lib.rs
diff --git a/examples/07-list/output/rust/src/point.rs b/examples/08-list/output/rust/src/point.rs
index ebadf95..ebadf95 100644
--- a/examples/07-list/output/rust/src/point.rs
+++ b/examples/08-list/output/rust/src/point.rs
diff --git a/examples/07-list/src/point.hob b/examples/08-list/src/point.hob
index 8dd438c..8dd438c 100644
--- a/examples/07-list/src/point.hob
+++ b/examples/08-list/src/point.hob
diff --git a/examples/08-native-type/hobgoblin.json5 b/examples/09-native-type/hobgoblin.json5
index a0f60c3..a0f60c3 100644
--- a/examples/08-native-type/hobgoblin.json5
+++ b/examples/09-native-type/hobgoblin.json5
diff --git a/examples/09-native-type-custom-config/output/java/.gitignore b/examples/09-native-type/output/java/.gitignore
index ff511d4..ff511d4 100644
--- a/examples/09-native-type-custom-config/output/java/.gitignore
+++ b/examples/09-native-type/output/java/.gitignore
diff --git a/examples/09-native-type-custom-config/output/java/pom.xml b/examples/09-native-type/output/java/pom.xml
index 445fa65..445fa65 120000
--- a/examples/09-native-type-custom-config/output/java/pom.xml
+++ b/examples/09-native-type/output/java/pom.xml
diff --git a/examples/08-native-type/output/java/src/main/java/org/zwobble/example/types/point/HobgoblinNativePoint.java b/examples/09-native-type/output/java/src/main/java/org/zwobble/example/types/point/HobgoblinNativePoint.java
index bdb5427..bdb5427 100644
--- a/examples/08-native-type/output/java/src/main/java/org/zwobble/example/types/point/HobgoblinNativePoint.java
+++ b/examples/09-native-type/output/java/src/main/java/org/zwobble/example/types/point/HobgoblinNativePoint.java
diff --git a/examples/08-native-type/output/java/src/main/java/org/zwobble/example/types/point/Point.java b/examples/09-native-type/output/java/src/main/java/org/zwobble/example/types/point/Point.java
index cd26290..cd26290 100644
--- a/examples/08-native-type/output/java/src/main/java/org/zwobble/example/types/point/Point.java
+++ b/examples/09-native-type/output/java/src/main/java/org/zwobble/example/types/point/Point.java
diff --git a/examples/08-native-type/output/java/src/test/java/org/zwobble/example/PointTests.java b/examples/09-native-type/output/java/src/test/java/org/zwobble/example/PointTests.java
index 8482673..8482673 100644
--- a/examples/08-native-type/output/java/src/test/java/org/zwobble/example/PointTests.java
+++ b/examples/09-native-type/output/java/src/test/java/org/zwobble/example/PointTests.java
diff --git a/examples/09-native-type-custom-config/output/rust/.gitignore b/examples/09-native-type/output/rust/.gitignore
index ea8c4bf..ea8c4bf 100644
--- a/examples/09-native-type-custom-config/output/rust/.gitignore
+++ b/examples/09-native-type/output/rust/.gitignore
diff --git a/examples/09-native-type-custom-config/output/rust/Cargo.lock b/examples/09-native-type/output/rust/Cargo.lock
index 9dc6e3e..9dc6e3e 100644
--- a/examples/09-native-type-custom-config/output/rust/Cargo.lock
+++ b/examples/09-native-type/output/rust/Cargo.lock
diff --git a/examples/09-native-type-custom-config/output/rust/Cargo.toml b/examples/09-native-type/output/rust/Cargo.toml
index 5d4c622..5d4c622 100644
--- a/examples/09-native-type-custom-config/output/rust/Cargo.toml
+++ b/examples/09-native-type/output/rust/Cargo.toml
diff --git a/examples/09-native-type-custom-config/output/rust/rust-toolchain.toml b/examples/09-native-type/output/rust/rust-toolchain.toml
index 4fedb95..4fedb95 100644
--- a/examples/09-native-type-custom-config/output/rust/rust-toolchain.toml
+++ b/examples/09-native-type/output/rust/rust-toolchain.toml
diff --git a/examples/08-native-type/output/rust/src/gen/point.rs b/examples/09-native-type/output/rust/src/gen/point.rs
index 8561605..8561605 100644
--- a/examples/08-native-type/output/rust/src/gen/point.rs
+++ b/examples/09-native-type/output/rust/src/gen/point.rs
diff --git a/examples/08-native-type/output/rust/src/lib.rs b/examples/09-native-type/output/rust/src/lib.rs
index 1179cff..1179cff 100644
--- a/examples/08-native-type/output/rust/src/lib.rs
+++ b/examples/09-native-type/output/rust/src/lib.rs
diff --git a/examples/08-native-type/output/rust/src/point.rs b/examples/09-native-type/output/rust/src/point.rs
index 3c763e2..3c763e2 100644
--- a/examples/08-native-type/output/rust/src/point.rs
+++ b/examples/09-native-type/output/rust/src/point.rs
diff --git a/examples/08-native-type/src/point.hob b/examples/09-native-type/src/point.hob
index 7178dcb..7178dcb 100644
--- a/examples/08-native-type/src/point.hob
+++ b/examples/09-native-type/src/point.hob
diff --git a/examples/09-native-type-custom-config/hobgoblin.json5 b/examples/10-native-type-custom-config/hobgoblin.json5
index f925903..f925903 100644
--- a/examples/09-native-type-custom-config/hobgoblin.json5
+++ b/examples/10-native-type-custom-config/hobgoblin.json5
diff --git a/examples/10-shared/output/java/.gitignore b/examples/10-native-type-custom-config/output/java/.gitignore
index ff511d4..ff511d4 100644
--- a/examples/10-shared/output/java/.gitignore
+++ b/examples/10-native-type-custom-config/output/java/.gitignore
diff --git a/examples/10-shared/output/java/pom.xml b/examples/10-native-type-custom-config/output/java/pom.xml
index 445fa65..445fa65 120000
--- a/examples/10-shared/output/java/pom.xml
+++ b/examples/10-native-type-custom-config/output/java/pom.xml
diff --git a/examples/09-native-type-custom-config/output/java/src/main/java/org/zwobble/example/Point.java b/examples/10-native-type-custom-config/output/java/src/main/java/org/zwobble/example/Point.java
index 8862a62..8862a62 100644
--- a/examples/09-native-type-custom-config/output/java/src/main/java/org/zwobble/example/Point.java
+++ b/examples/10-native-type-custom-config/output/java/src/main/java/org/zwobble/example/Point.java
diff --git a/examples/09-native-type-custom-config/output/java/src/main/java/org/zwobble/example/types/point/HobgoblinNativePoint.java b/examples/10-native-type-custom-config/output/java/src/main/java/org/zwobble/example/types/point/HobgoblinNativePoint.java
index 74ac856..74ac856 100644
--- a/examples/09-native-type-custom-config/output/java/src/main/java/org/zwobble/example/types/point/HobgoblinNativePoint.java
+++ b/examples/10-native-type-custom-config/output/java/src/main/java/org/zwobble/example/types/point/HobgoblinNativePoint.java
diff --git a/examples/09-native-type-custom-config/output/java/src/test/java/org/zwobble/example/PointTests.java b/examples/10-native-type-custom-config/output/java/src/test/java/org/zwobble/example/PointTests.java
index ea635ca..ea635ca 100644
--- a/examples/09-native-type-custom-config/output/java/src/test/java/org/zwobble/example/PointTests.java
+++ b/examples/10-native-type-custom-config/output/java/src/test/java/org/zwobble/example/PointTests.java
diff --git a/examples/10-shared/output/rust/.gitignore b/examples/10-native-type-custom-config/output/rust/.gitignore
index ea8c4bf..ea8c4bf 100644
--- a/examples/10-shared/output/rust/.gitignore
+++ b/examples/10-native-type-custom-config/output/rust/.gitignore
diff --git a/examples/10-shared/output/rust/Cargo.lock b/examples/10-native-type-custom-config/output/rust/Cargo.lock
index 9dc6e3e..9dc6e3e 100644
--- a/examples/10-shared/output/rust/Cargo.lock
+++ b/examples/10-native-type-custom-config/output/rust/Cargo.lock
diff --git a/examples/10-shared/output/rust/Cargo.toml b/examples/10-native-type-custom-config/output/rust/Cargo.toml
index 5d4c622..5d4c622 100644
--- a/examples/10-shared/output/rust/Cargo.toml
+++ b/examples/10-native-type-custom-config/output/rust/Cargo.toml
diff --git a/examples/10-shared/output/rust/rust-toolchain.toml b/examples/10-native-type-custom-config/output/rust/rust-toolchain.toml
index 4fedb95..4fedb95 100644
--- a/examples/10-shared/output/rust/rust-toolchain.toml
+++ b/examples/10-native-type-custom-config/output/rust/rust-toolchain.toml
diff --git a/examples/09-native-type-custom-config/output/rust/src/main.rs b/examples/10-native-type-custom-config/output/rust/src/main.rs
index fa127e8..fa127e8 100644
--- a/examples/09-native-type-custom-config/output/rust/src/main.rs
+++ b/examples/10-native-type-custom-config/output/rust/src/main.rs
diff --git a/examples/09-native-type-custom-config/output/rust/src/point.rs b/examples/10-native-type-custom-config/output/rust/src/point.rs
index f25a76f..f25a76f 100644
--- a/examples/09-native-type-custom-config/output/rust/src/point.rs
+++ b/examples/10-native-type-custom-config/output/rust/src/point.rs
diff --git a/examples/09-native-type-custom-config/src/point.hob b/examples/10-native-type-custom-config/src/point.hob
index 7178dcb..7178dcb 100644
--- a/examples/09-native-type-custom-config/src/point.hob
+++ b/examples/10-native-type-custom-config/src/point.hob
diff --git a/examples/11-shared/hobgoblin.json5 b/examples/11-shared/hobgoblin.json5
new file mode 100644
index 0000000..19e0f93
--- /dev/null
+++ b/examples/11-shared/hobgoblin.json5
@@ -0,0 +1,23 @@
+{
+  outputs: {
+    langs: {
+      java: {
+        packageName: "org.zwobble.example.types",
+      },
+    },
+    generators: [
+      {
+        generator: "java-types",
+        path: "output/java/src/gen/java",
+      },
+      {
+        generator: "java-precisely-matchers",
+        path: "output/java/src/gen/java",
+      },
+      {
+        generator: "rust-types",
+        path: "output/rust/src",
+      },
+    ],
+  }
+}
diff --git a/examples/11-custom-code/output/java/.gitignore b/examples/11-shared/output/java/.gitignore
index ff511d4..ff511d4 100644
--- a/examples/11-custom-code/output/java/.gitignore
+++ b/examples/11-shared/output/java/.gitignore
diff --git a/examples/11-custom-code/output/java/pom.xml b/examples/11-shared/output/java/pom.xml
index 445fa65..445fa65 120000
--- a/examples/11-custom-code/output/java/pom.xml
+++ b/examples/11-shared/output/java/pom.xml
diff --git a/examples/10-shared/output/java/src/test/java/org/zwobble/example/PointTests.java b/examples/11-shared/output/java/src/test/java/org/zwobble/example/PointTests.java
index b4c140d..b4c140d 100644
--- a/examples/10-shared/output/java/src/test/java/org/zwobble/example/PointTests.java
+++ b/examples/11-shared/output/java/src/test/java/org/zwobble/example/PointTests.java
diff --git a/examples/11-custom-code/output/rust/.gitignore b/examples/11-shared/output/rust/.gitignore
index ea8c4bf..ea8c4bf 100644
--- a/examples/11-custom-code/output/rust/.gitignore
+++ b/examples/11-shared/output/rust/.gitignore
diff --git a/examples/11-custom-code/output/rust/Cargo.lock b/examples/11-shared/output/rust/Cargo.lock
index 9dc6e3e..9dc6e3e 100644
--- a/examples/11-custom-code/output/rust/Cargo.lock
+++ b/examples/11-shared/output/rust/Cargo.lock
diff --git a/examples/11-custom-code/output/rust/Cargo.toml b/examples/11-shared/output/rust/Cargo.toml
index 5d4c622..5d4c622 100644
--- a/examples/11-custom-code/output/rust/Cargo.toml
+++ b/examples/11-shared/output/rust/Cargo.toml
diff --git a/examples/11-custom-code/output/rust/rust-toolchain.toml b/examples/11-shared/output/rust/rust-toolchain.toml
index 4fedb95..4fedb95 100644
--- a/examples/11-custom-code/output/rust/rust-toolchain.toml
+++ b/examples/11-shared/output/rust/rust-toolchain.toml
diff --git a/examples/10-shared/output/rust/src/lib.rs b/examples/11-shared/output/rust/src/lib.rs
index af2c87f..af2c87f 100644
--- a/examples/10-shared/output/rust/src/lib.rs
+++ b/examples/11-shared/output/rust/src/lib.rs
diff --git a/examples/10-shared/output/rust/src/point.rs b/examples/11-shared/output/rust/src/point.rs
index 7bc470a..7bc470a 100644
--- a/examples/10-shared/output/rust/src/point.rs
+++ b/examples/11-shared/output/rust/src/point.rs
diff --git a/examples/10-shared/src/point.hob b/examples/11-shared/src/point.hob
index 7b9a8e6..7b9a8e6 100644
--- a/examples/10-shared/src/point.hob
+++ b/examples/11-shared/src/point.hob
diff --git a/examples/11-custom-code/hobgoblin.json5 b/examples/12-custom-code/hobgoblin.json5
index 1d08a40..1d08a40 100644
--- a/examples/11-custom-code/hobgoblin.json5
+++ b/examples/12-custom-code/hobgoblin.json5
diff --git a/examples/12-imports/output/java/.gitignore b/examples/12-custom-code/output/java/.gitignore
index ff511d4..ff511d4 100644
--- a/examples/12-imports/output/java/.gitignore
+++ b/examples/12-custom-code/output/java/.gitignore
diff --git a/examples/12-imports/output/java/pom.xml b/examples/12-custom-code/output/java/pom.xml
index 445fa65..445fa65 120000
--- a/examples/12-imports/output/java/pom.xml
+++ b/examples/12-custom-code/output/java/pom.xml
diff --git a/examples/11-custom-code/output/java/src/main/java/org/zwobble/example/types/shapes/Square.java b/examples/12-custom-code/output/java/src/main/java/org/zwobble/example/types/shapes/Square.java
index 69a1ab1..69a1ab1 100644
--- a/examples/11-custom-code/output/java/src/main/java/org/zwobble/example/types/shapes/Square.java
+++ b/examples/12-custom-code/output/java/src/main/java/org/zwobble/example/types/shapes/Square.java
diff --git a/examples/11-custom-code/output/java/src/test/java/org/zwobble/example/ShapesTests.java b/examples/12-custom-code/output/java/src/test/java/org/zwobble/example/ShapesTests.java
index fba8e6c..fba8e6c 100644
--- a/examples/11-custom-code/output/java/src/test/java/org/zwobble/example/ShapesTests.java
+++ b/examples/12-custom-code/output/java/src/test/java/org/zwobble/example/ShapesTests.java
diff --git a/examples/12-imports/output/rust/.gitignore b/examples/12-custom-code/output/rust/.gitignore
index ea8c4bf..ea8c4bf 100644
--- a/examples/12-imports/output/rust/.gitignore
+++ b/examples/12-custom-code/output/rust/.gitignore
diff --git a/examples/12-imports/output/rust/Cargo.lock b/examples/12-custom-code/output/rust/Cargo.lock
index 9dc6e3e..9dc6e3e 100644
--- a/examples/12-imports/output/rust/Cargo.lock
+++ b/examples/12-custom-code/output/rust/Cargo.lock
diff --git a/examples/12-imports/output/rust/Cargo.toml b/examples/12-custom-code/output/rust/Cargo.toml
index 5d4c622..5d4c622 100644
--- a/examples/12-imports/output/rust/Cargo.toml
+++ b/examples/12-custom-code/output/rust/Cargo.toml
diff --git a/examples/12-imports/output/rust/rust-toolchain.toml b/examples/12-custom-code/output/rust/rust-toolchain.toml
index 4fedb95..4fedb95 100644
--- a/examples/12-imports/output/rust/rust-toolchain.toml
+++ b/examples/12-custom-code/output/rust/rust-toolchain.toml
diff --git a/examples/11-custom-code/output/rust/src/gen/shapes.rs b/examples/12-custom-code/output/rust/src/gen/shapes.rs
index d1582ad..d1582ad 100644
--- a/examples/11-custom-code/output/rust/src/gen/shapes.rs
+++ b/examples/12-custom-code/output/rust/src/gen/shapes.rs
diff --git a/examples/11-custom-code/output/rust/src/lib.rs b/examples/12-custom-code/output/rust/src/lib.rs
index 1825d72..1825d72 100644
--- a/examples/11-custom-code/output/rust/src/lib.rs
+++ b/examples/12-custom-code/output/rust/src/lib.rs
diff --git a/examples/11-custom-code/output/rust/src/shapes.rs b/examples/12-custom-code/output/rust/src/shapes.rs
index f806bbb..f806bbb 100644
--- a/examples/11-custom-code/output/rust/src/shapes.rs
+++ b/examples/12-custom-code/output/rust/src/shapes.rs
diff --git a/examples/11-custom-code/src/shapes.hob b/examples/12-custom-code/src/shapes.hob
index 5dfe833..5dfe833 100644
--- a/examples/11-custom-code/src/shapes.hob
+++ b/examples/12-custom-code/src/shapes.hob
diff --git a/examples/12-imports/hobgoblin.json5 b/examples/13-imports/hobgoblin.json5
index 12713d4..12713d4 100644
--- a/examples/12-imports/hobgoblin.json5
+++ b/examples/13-imports/hobgoblin.json5
diff --git a/examples/13-imports/output/java/.gitignore b/examples/13-imports/output/java/.gitignore
new file mode 100644
index 0000000..ff511d4
--- /dev/null
+++ b/examples/13-imports/output/java/.gitignore
@@ -0,0 +1,2 @@
+/src/gen/
+/target/
diff --git a/examples/13-transient-0/output/java/pom.xml b/examples/13-imports/output/java/pom.xml
index 445fa65..445fa65 120000
--- a/examples/13-transient-0/output/java/pom.xml
+++ b/examples/13-imports/output/java/pom.xml
diff --git a/examples/12-imports/output/java/src/test/java/org/zwobble/example/LineTests.java b/examples/13-imports/output/java/src/test/java/org/zwobble/example/LineTests.java
index c376b19..c376b19 100644
--- a/examples/12-imports/output/java/src/test/java/org/zwobble/example/LineTests.java
+++ b/examples/13-imports/output/java/src/test/java/org/zwobble/example/LineTests.java
diff --git a/examples/13-imports/output/rust/.gitignore b/examples/13-imports/output/rust/.gitignore
new file mode 100644
index 0000000..ea8c4bf
--- /dev/null
+++ b/examples/13-imports/output/rust/.gitignore
@@ -0,0 +1 @@
+/target
diff --git a/examples/13-transient-0/output/rust/Cargo.lock b/examples/13-imports/output/rust/Cargo.lock
index 9dc6e3e..9dc6e3e 100644
--- a/examples/13-transient-0/output/rust/Cargo.lock
+++ b/examples/13-imports/output/rust/Cargo.lock
diff --git a/examples/13-transient-0/output/rust/Cargo.toml b/examples/13-imports/output/rust/Cargo.toml
index 5d4c622..5d4c622 100644
--- a/examples/13-transient-0/output/rust/Cargo.toml
+++ b/examples/13-imports/output/rust/Cargo.toml
diff --git a/examples/13-transient-0/output/rust/rust-toolchain.toml b/examples/13-imports/output/rust/rust-toolchain.toml
index 4fedb95..4fedb95 100644
--- a/examples/13-transient-0/output/rust/rust-toolchain.toml
+++ b/examples/13-imports/output/rust/rust-toolchain.toml
diff --git a/examples/12-imports/output/rust/src/lib.rs b/examples/13-imports/output/rust/src/lib.rs
index ffbcbf4..ffbcbf4 100644
--- a/examples/12-imports/output/rust/src/lib.rs
+++ b/examples/13-imports/output/rust/src/lib.rs
diff --git a/examples/12-imports/output/rust/src/line.rs b/examples/13-imports/output/rust/src/line.rs
index 8561605..8561605 100644
--- a/examples/12-imports/output/rust/src/line.rs
+++ b/examples/13-imports/output/rust/src/line.rs
diff --git a/examples/12-imports/output/rust/src/point.rs b/examples/13-imports/output/rust/src/point.rs
index 6d9b010..6d9b010 100644
--- a/examples/12-imports/output/rust/src/point.rs
+++ b/examples/13-imports/output/rust/src/point.rs
diff --git a/examples/12-imports/src/line.hob b/examples/13-imports/src/line.hob
index 562d77f..562d77f 100644
--- a/examples/12-imports/src/line.hob
+++ b/examples/13-imports/src/line.hob
diff --git a/examples/12-imports/src/point.hob b/examples/13-imports/src/point.hob
index 87f9953..87f9953 100644
--- a/examples/12-imports/src/point.hob
+++ b/examples/13-imports/src/point.hob
diff --git a/examples/13-transient-0/hobgoblin.json5 b/examples/14-transient-0/hobgoblin.json5
index 2160c60..2160c60 100644
--- a/examples/13-transient-0/hobgoblin.json5
+++ b/examples/14-transient-0/hobgoblin.json5
diff --git a/examples/13-transient-0/output/java/.gitignore b/examples/14-transient-0/output/java/.gitignore
index 2fcf0b8..2fcf0b8 100644
--- a/examples/13-transient-0/output/java/.gitignore
+++ b/examples/14-transient-0/output/java/.gitignore
diff --git a/examples/14-transient-0/output/java/pom.xml b/examples/14-transient-0/output/java/pom.xml
new file mode 120000
index 0000000..445fa65
--- /dev/null
+++ b/examples/14-transient-0/output/java/pom.xml
@@ -0,0 +1 @@
+../../../templates/java-junit/pom.xml
+\ No newline at end of file
diff --git a/examples/13-transient-0/output/java/src/test/java/org/zwobble/example/Transient0Tests.java b/examples/14-transient-0/output/java/src/test/java/org/zwobble/example/Transient0Tests.java
index 8161920..8161920 100644
--- a/examples/13-transient-0/output/java/src/test/java/org/zwobble/example/Transient0Tests.java
+++ b/examples/14-transient-0/output/java/src/test/java/org/zwobble/example/Transient0Tests.java
diff --git a/examples/13-transient-0/output/rust/.gitignore b/examples/14-transient-0/output/rust/.gitignore
index fc03479..fc03479 100644
--- a/examples/13-transient-0/output/rust/.gitignore
+++ b/examples/14-transient-0/output/rust/.gitignore
diff --git a/examples/14-transient-0/output/rust/Cargo.lock b/examples/14-transient-0/output/rust/Cargo.lock
new file mode 100644
index 0000000..9dc6e3e
--- /dev/null
+++ b/examples/14-transient-0/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/14-transient-0/output/rust/Cargo.toml b/examples/14-transient-0/output/rust/Cargo.toml
new file mode 100644
index 0000000..5d4c622
--- /dev/null
+++ b/examples/14-transient-0/output/rust/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "example"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
diff --git a/examples/14-transient-0/output/rust/rust-toolchain.toml b/examples/14-transient-0/output/rust/rust-toolchain.toml
new file mode 100644
index 0000000..4fedb95
--- /dev/null
+++ b/examples/14-transient-0/output/rust/rust-toolchain.toml
@@ -0,0 +1,2 @@
+[toolchain]
+channel = "1.96"
diff --git a/examples/13-transient-0/output/rust/src/data.rs b/examples/14-transient-0/output/rust/src/data.rs
index 7a0c4fa..7a0c4fa 100644
--- a/examples/13-transient-0/output/rust/src/data.rs
+++ b/examples/14-transient-0/output/rust/src/data.rs
diff --git a/examples/13-transient-0/output/rust/src/gen/data.rs b/examples/14-transient-0/output/rust/src/gen/data.rs
index 77bcbe8..77bcbe8 100644
--- a/examples/13-transient-0/output/rust/src/gen/data.rs
+++ b/examples/14-transient-0/output/rust/src/gen/data.rs
diff --git a/examples/13-transient-0/output/rust/src/gen/data/transient_0.rs b/examples/14-transient-0/output/rust/src/gen/data/transient_0.rs
index f2bf149..f2bf149 100644
--- a/examples/13-transient-0/output/rust/src/gen/data/transient_0.rs
+++ b/examples/14-transient-0/output/rust/src/gen/data/transient_0.rs
diff --git a/examples/13-transient-0/output/rust/src/gen/transient_0.rs b/examples/14-transient-0/output/rust/src/gen/transient_0.rs
index 6505408..6505408 100644
--- a/examples/13-transient-0/output/rust/src/gen/transient_0.rs
+++ b/examples/14-transient-0/output/rust/src/gen/transient_0.rs
diff --git a/examples/13-transient-0/output/rust/src/lib.rs b/examples/14-transient-0/output/rust/src/lib.rs
index df50cae..df50cae 100644
--- a/examples/13-transient-0/output/rust/src/lib.rs
+++ b/examples/14-transient-0/output/rust/src/lib.rs
diff --git a/examples/13-transient-0/output/rust/src/transient_0.rs b/examples/14-transient-0/output/rust/src/transient_0.rs
index 8b2b800..8b2b800 100644
--- a/examples/13-transient-0/output/rust/src/transient_0.rs
+++ b/examples/14-transient-0/output/rust/src/transient_0.rs
diff --git a/examples/13-transient-0/src/data.hob b/examples/14-transient-0/src/data.hob
index 0744b79..0744b79 100644
--- a/examples/13-transient-0/src/data.hob
+++ b/examples/14-transient-0/src/data.hob
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/HobgoblinCompiler.java b/src/main/java/org/zwobble/hobgoblin/compiler/HobgoblinCompiler.java
index 6f4c65d..eb78e2a 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/HobgoblinCompiler.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/HobgoblinCompiler.java
@@ -48,6 +48,7 @@ public class HobgoblinCompiler {
         typeCheckerContext.addNativeType(NativeTypes.INT_32);
         typeCheckerContext.addNativeType(NativeTypes.INT_64);
         typeCheckerContext.addNativeType(NativeTypes.STRING);
+        typeCheckerContext.addNativeTypeConstructor(NativeTypes.BOX);
         typeCheckerContext.addNativeTypeConstructor(NativeTypes.LIST);
         typeCheckerContext.addNativeTypeConstructor(NativeTypes.OPTION);
         typeCheckerContext.addNativeTypeConstructor(NativeTypes.SHARED);
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/builtins/NativeTypes.java b/src/main/java/org/zwobble/hobgoblin/compiler/builtins/NativeTypes.java
index 58c8143..7f8cf0f 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/builtins/NativeTypes.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/builtins/NativeTypes.java
@@ -13,6 +13,13 @@ public class NativeTypes {
     public static SimpleNativeType INT_64 = SimpleNativeType.builtin("Int64");
     public static SimpleNativeType STRING = SimpleNativeType.builtin("String");
 
+    public static final SimpleNativeType BOX_INNER = SimpleNativeType.builtin("Box");
+
+    public static TypeConstructor<SimpleNativeType> BOX = new TypeConstructor<>(
+        List.of(new TypeParam("T")),
+        BOX_INNER
+    );
+
     public static final SimpleNativeType LIST_INNER = SimpleNativeType.builtin("List");
 
     public static TypeConstructor<SimpleNativeType> LIST = new TypeConstructor<>(
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/generators/java/JavaGenerator.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/generators/java/JavaGenerator.java
index 35bb931..eab31b4 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/generators/java/JavaGenerator.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/generators/java/JavaGenerator.java
@@ -210,7 +210,10 @@ public class JavaGenerator {
             return type;
         }
 
-        if (!constructedNativeType.constructor().equals(NativeTypes.SHARED)) {
+        if (
+            !constructedNativeType.constructor().equals(NativeTypes.SHARED) &&
+            !constructedNativeType.constructor().equals(NativeTypes.BOX)
+        ) {
             return type;
         }
 
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/generators/rust/RustGeneratorConfig.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/generators/rust/RustGeneratorConfig.java
index 13721d4..3f5e4d5 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/generators/rust/RustGeneratorConfig.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/generators/rust/RustGeneratorConfig.java
@@ -57,6 +57,7 @@ public record RustGeneratorConfig(
         Map.entry(NativeTypes.INT_32, new RustNativeTypeConfig(RustTypes.I32)),
         Map.entry(NativeTypes.INT_64, new RustNativeTypeConfig(RustTypes.I64)),
         Map.entry(NativeTypes.STRING, new RustNativeTypeConfig(RustTypes.STRING)),
+        Map.entry(NativeTypes.BOX_INNER, new RustNativeTypeConfig(RustTypes.BOX)),
         Map.entry(NativeTypes.LIST_INNER, new RustNativeTypeConfig(RustPath.global("std", "vec", "Vec"))),
         Map.entry(NativeTypes.OPTION_INNER, new RustNativeTypeConfig(RustPath.global("std", "option", "Option"))),
         Map.entry(NativeTypes.SHARED_INNER, new RustNativeTypeConfig(RustPath.global("std", "sync", "Arc")))