Add Shared type

13 files changed, 806 insertions, 0 deletions

diff --git a/examples/11-transient-0/output/java/.gitignore b/examples/11-transient-0/output/java/.gitignore
new file mode 100644
index 0000000..ff511d4
--- /dev/null
+++ b/examples/11-transient-0/output/java/.gitignore
@@ -0,0 +1,2 @@
+/src/gen/
+/target/
diff --git a/examples/11-transient-0/output/java/pom.xml b/examples/11-transient-0/output/java/pom.xml
new file mode 120000
index 0000000..445fa65
--- /dev/null
+++ b/examples/11-transient-0/output/java/pom.xml
@@ -0,0 +1 @@
+../../../templates/java-junit/pom.xml
\ No newline at end of file
diff --git a/examples/11-transient-0/output/java/src/test/java/org/zwobble/example/Transient0Tests.java b/examples/11-transient-0/output/java/src/test/java/org/zwobble/example/Transient0Tests.java
new file mode 100644
index 0000000..6369f93
--- /dev/null
+++ b/examples/11-transient-0/output/java/src/test/java/org/zwobble/example/Transient0Tests.java
@@ -0,0 +1,214 @@
+package org.zwobble.example;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.List;
+import java.util.Optional;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.zwobble.example.types.data.EnumWithVariants;
+import org.zwobble.example.types.data.HobgoblinTransient0Data;
+import org.zwobble.example.types.data.StructWithBool;
+import org.zwobble.example.types.data.StructWithEnum;
+import org.zwobble.example.types.data.StructWithInt32;
+import org.zwobble.example.types.data.StructWithInt64;
+import org.zwobble.example.types.data.StructWithList;
+import org.zwobble.example.types.data.StructWithOption;
+import org.zwobble.example.types.data.StructWithString;
+import org.zwobble.example.types.data.StructWithStruct;
+import org.zwobble.example.types.data.StructWithSum;
+import org.zwobble.example.types.data.VariantOne;
+import org.zwobble.example.types.data.VariantTwo;
+
+public class Transient0Tests {
+    @Test
+    public void structWithBool() throws IOException {
+        var value = new StructWithBool(true, false);
+
+        assertRoundTripEncoding(
+            value,
+            HobgoblinTransient0Data::encodeStructWithBool,
+            HobgoblinTransient0Data::decodeStructWithBool
+        );
+    }
+
+    @Test
+    public void structWithInt32() throws IOException {
+        var value = new StructWithInt32(10, 25);
+
+        assertRoundTripEncoding(
+            value,
+            HobgoblinTransient0Data::encodeStructWithInt32,
+            HobgoblinTransient0Data::decodeStructWithInt32
+        );
+    }
+
+    @Test
+    public void structWithInt64() throws IOException {
+        var value = new StructWithInt64(10, 25);
+
+        assertRoundTripEncoding(
+            value,
+            HobgoblinTransient0Data::encodeStructWithInt64,
+            HobgoblinTransient0Data::decodeStructWithInt64
+        );
+    }
+
+    @Test
+    public void structWithString() throws IOException {
+        var value = new StructWithString("abc", "def");
+
+        assertRoundTripEncoding(
+            value,
+            HobgoblinTransient0Data::encodeStructWithString,
+            HobgoblinTransient0Data::decodeStructWithString
+        );
+    }
+
+    @Test
+    public void structWithStruct() throws IOException {
+        var value = new StructWithStruct(new StructWithInt32(10, 25), 42);
+
+        assertRoundTripEncoding(
+            value,
+            HobgoblinTransient0Data::encodeStructWithStruct,
+            HobgoblinTransient0Data::decodeStructWithStruct
+        );
+    }
+
+    @Test
+    public void structWithList() throws IOException {
+        var value = new StructWithList(
+            List.of(10L, 25L),
+            List.of(
+                new StructWithInt32(42, 47),
+                new StructWithInt32(52, 57),
+                new StructWithInt32(62, 67)
+            )
+        );
+
+        assertRoundTripEncoding(
+            value,
+            HobgoblinTransient0Data::encodeStructWithList,
+            HobgoblinTransient0Data::decodeStructWithList
+        );
+    }
+
+    @Test
+    public void structWithOptionNone() throws IOException {
+        var value = new StructWithOption(
+            Optional.empty(),
+            Optional.empty()
+        );
+
+        assertRoundTripEncoding(
+            value,
+            HobgoblinTransient0Data::encodeStructWithOption,
+            HobgoblinTransient0Data::decodeStructWithOption
+        );
+    }
+
+    @Test
+    public void structWithOptionSome() throws IOException {
+        var value = new StructWithOption(
+            Optional.of(10L),
+            Optional.of(new StructWithInt32(42, 47))
+        );
+
+        assertRoundTripEncoding(
+            value,
+            HobgoblinTransient0Data::encodeStructWithOption,
+            HobgoblinTransient0Data::decodeStructWithOption
+        );
+    }
+
+    @Test
+    public void enumWithVariants() throws IOException {
+        assertRoundTripEncoding(
+            EnumWithVariants.ZERO,
+            HobgoblinTransient0Data::encodeEnumWithVariants,
+            HobgoblinTransient0Data::decodeEnumWithVariants
+        );
+
+        assertRoundTripEncoding(
+            EnumWithVariants.ONE,
+            HobgoblinTransient0Data::encodeEnumWithVariants,
+            HobgoblinTransient0Data::decodeEnumWithVariants
+        );
+
+        assertRoundTripEncoding(
+            EnumWithVariants.TWO,
+            HobgoblinTransient0Data::encodeEnumWithVariants,
+            HobgoblinTransient0Data::decodeEnumWithVariants
+        );
+    }
+
+    @Test
+    public void structWithEnum() throws IOException {
+        var value = new StructWithEnum(
+            EnumWithVariants.ONE,
+            42
+        );
+
+        assertRoundTripEncoding(
+            value,
+            HobgoblinTransient0Data::encodeStructWithEnum,
+            HobgoblinTransient0Data::decodeStructWithEnum
+        );
+    }
+
+    @Test
+    public void sumWithVariants() throws IOException {
+        assertRoundTripEncoding(
+            new VariantOne(10),
+            HobgoblinTransient0Data::encodeSumWithVariants,
+            HobgoblinTransient0Data::decodeSumWithVariants
+        );
+
+        assertRoundTripEncoding(
+            new VariantTwo(25),
+            HobgoblinTransient0Data::encodeSumWithVariants,
+            HobgoblinTransient0Data::decodeSumWithVariants
+        );
+    }
+
+    @Test
+    public void structWithSum() throws IOException {
+        var value = new StructWithSum(
+            new VariantTwo(25),
+            42
+        );
+
+        assertRoundTripEncoding(
+            value,
+            HobgoblinTransient0Data::encodeStructWithSum,
+            HobgoblinTransient0Data::decodeStructWithSum
+        );
+    }
+
+    private <T> void assertRoundTripEncoding(
+        T value,
+        Encoder<T> encoder,
+        Decoder<T> decoder
+    ) throws IOException {
+        var outputStream = new ByteArrayOutputStream();
+        encoder.encode(value, outputStream);
+        var bytes = outputStream.toByteArray();
+
+        var inputStream = new ByteArrayInputStream(bytes);
+        var decodedValue = decoder.decode(inputStream);
+
+        Assertions.assertEquals(value, decodedValue);
+    }
+
+    private interface Encoder<T> {
+        void encode(T value, OutputStream outputStream) throws IOException;
+    }
+
+    private interface Decoder<T> {
+        T decode(InputStream inputStream) throws IOException;
+    }
+}
diff --git a/examples/11-transient-0/output/rust/.gitignore b/examples/11-transient-0/output/rust/.gitignore
new file mode 100644
index 0000000..ea8c4bf
--- /dev/null
+++ b/examples/11-transient-0/output/rust/.gitignore
@@ -0,0 +1 @@
+/target
diff --git a/examples/11-transient-0/output/rust/Cargo.lock b/examples/11-transient-0/output/rust/Cargo.lock
new file mode 100644
index 0000000..9dc6e3e
--- /dev/null
+++ b/examples/11-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/11-transient-0/output/rust/Cargo.toml b/examples/11-transient-0/output/rust/Cargo.toml
new file mode 100644
index 0000000..5d4c622
--- /dev/null
+++ b/examples/11-transient-0/output/rust/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "example"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
diff --git a/examples/11-transient-0/output/rust/rust-toolchain.toml b/examples/11-transient-0/output/rust/rust-toolchain.toml
new file mode 100644
index 0000000..4fedb95
--- /dev/null
+++ b/examples/11-transient-0/output/rust/rust-toolchain.toml
@@ -0,0 +1,2 @@
+[toolchain]
+channel = "1.96"
diff --git a/examples/11-transient-0/output/rust/src/data.rs b/examples/11-transient-0/output/rust/src/data.rs
new file mode 100644
index 0000000..7a0c4fa
--- /dev/null
+++ b/examples/11-transient-0/output/rust/src/data.rs
@@ -0,0 +1,5 @@
+include!("./gen/data.rs");
+
+pub mod transient_0 {
+    include!("./gen/data/transient_0.rs");
+}
diff --git a/examples/11-transient-0/output/rust/src/gen/data.rs b/examples/11-transient-0/output/rust/src/gen/data.rs
new file mode 100644
index 0000000..0ea6c0f
--- /dev/null
+++ b/examples/11-transient-0/output/rust/src/gen/data.rs
@@ -0,0 +1,90 @@
+// Generated by hobgoblin.
+
+#[derive(Debug, PartialEq)]
+pub struct StructWithBool {
+    pub a: ::core::primitive::bool,
+    pub b: ::core::primitive::bool,
+}
+
+#[derive(Debug, PartialEq)]
+pub struct StructWithInt32 {
+    pub a: ::core::primitive::i32,
+    pub b: ::core::primitive::i32,
+}
+
+#[derive(Debug, PartialEq)]
+pub struct StructWithInt64 {
+    pub a: ::core::primitive::i64,
+    pub b: ::core::primitive::i64,
+}
+
+#[derive(Debug, PartialEq)]
+pub struct StructWithString {
+    pub a: ::std::string::String,
+    pub b: ::std::string::String,
+}
+
+#[derive(Debug, PartialEq)]
+pub struct StructWithStruct {
+    pub inner: crate::data::StructWithInt32,
+    pub c: ::core::primitive::i32,
+}
+
+#[derive(Debug, PartialEq)]
+pub struct StructWithList {
+    pub a: ::std::vec::Vec::<::core::primitive::i64>,
+    pub b: ::std::vec::Vec::<crate::data::StructWithInt32>,
+}
+
+#[derive(Debug, PartialEq)]
+pub struct StructWithOption {
+    pub a: ::std::option::Option::<::core::primitive::i64>,
+    pub b: ::std::option::Option::<crate::data::StructWithInt32>,
+}
+
+#[derive(Debug, PartialEq)]
+pub enum EnumWithVariants {
+    Zero,
+    One,
+    Two,
+}
+
+#[derive(Debug, PartialEq)]
+pub struct StructWithEnum {
+    pub inner: crate::data::EnumWithVariants,
+    pub c: ::core::primitive::i32,
+}
+
+#[derive(Debug, PartialEq)]
+pub enum SumWithVariants {
+    VariantOne(crate::data::VariantOne),
+    VariantTwo(crate::data::VariantTwo),
+}
+
+impl ::std::convert::From::<crate::data::VariantOne> for crate::data::SumWithVariants {
+    fn from(value: crate::data::VariantOne) -> Self {
+        Self::VariantOne(value)
+    }
+}
+
+impl ::std::convert::From::<crate::data::VariantTwo> for crate::data::SumWithVariants {
+    fn from(value: crate::data::VariantTwo) -> Self {
+        Self::VariantTwo(value)
+    }
+}
+
+#[derive(Debug, PartialEq)]
+pub struct VariantOne {
+    pub a: ::core::primitive::i32,
+}
+
+#[derive(Debug, PartialEq)]
+pub struct VariantTwo {
+    pub a: ::core::primitive::i64,
+}
+
+#[derive(Debug, PartialEq)]
+pub struct StructWithSum {
+    pub inner: crate::data::SumWithVariants,
+    pub b: ::core::primitive::i32,
+}
diff --git a/examples/11-transient-0/output/rust/src/gen/data/transient_0.rs b/examples/11-transient-0/output/rust/src/gen/data/transient_0.rs
new file mode 100644
index 0000000..82fb5f7
--- /dev/null
+++ b/examples/11-transient-0/output/rust/src/gen/data/transient_0.rs
@@ -0,0 +1,223 @@
+// Generated by hobgoblin.
+
+pub fn encode_struct_with_bool(value: &crate::data::StructWithBool, writer: &mut impl std::io::Write) -> ::std::io::Result::<()> {
+    crate::transient_0::encode_bool(&value.a, writer)?;
+    crate::transient_0::encode_bool(&value.b, writer)?;
+    ::std::io::Result::Ok(())
+}
+
+pub fn decode_struct_with_bool(reader: &mut impl std::io::Read) -> ::std::io::Result::<crate::data::StructWithBool> {
+    let a = crate::transient_0::decode_bool(reader)?;
+    let b = crate::transient_0::decode_bool(reader)?;
+    std::io::Result::Ok(crate::data::StructWithBool { a: a, b: b })
+}
+
+pub fn encode_struct_with_int_32(value: &crate::data::StructWithInt32, writer: &mut impl std::io::Write) -> ::std::io::Result::<()> {
+    crate::transient_0::encode_int_32(&value.a, writer)?;
+    crate::transient_0::encode_int_32(&value.b, writer)?;
+    ::std::io::Result::Ok(())
+}
+
+pub fn decode_struct_with_int_32(reader: &mut impl std::io::Read) -> ::std::io::Result::<crate::data::StructWithInt32> {
+    let a = crate::transient_0::decode_int_32(reader)?;
+    let b = crate::transient_0::decode_int_32(reader)?;
+    std::io::Result::Ok(crate::data::StructWithInt32 { a: a, b: b })
+}
+
+pub fn encode_struct_with_int_64(value: &crate::data::StructWithInt64, writer: &mut impl std::io::Write) -> ::std::io::Result::<()> {
+    crate::transient_0::encode_int_64(&value.a, writer)?;
+    crate::transient_0::encode_int_64(&value.b, writer)?;
+    ::std::io::Result::Ok(())
+}
+
+pub fn decode_struct_with_int_64(reader: &mut impl std::io::Read) -> ::std::io::Result::<crate::data::StructWithInt64> {
+    let a = crate::transient_0::decode_int_64(reader)?;
+    let b = crate::transient_0::decode_int_64(reader)?;
+    std::io::Result::Ok(crate::data::StructWithInt64 { a: a, b: b })
+}
+
+pub fn encode_struct_with_string(value: &crate::data::StructWithString, writer: &mut impl std::io::Write) -> ::std::io::Result::<()> {
+    crate::transient_0::encode_string(&value.a, writer)?;
+    crate::transient_0::encode_string(&value.b, writer)?;
+    ::std::io::Result::Ok(())
+}
+
+pub fn decode_struct_with_string(reader: &mut impl std::io::Read) -> ::std::io::Result::<crate::data::StructWithString> {
+    let a = crate::transient_0::decode_string(reader)?;
+    let b = crate::transient_0::decode_string(reader)?;
+    std::io::Result::Ok(crate::data::StructWithString { a: a, b: b })
+}
+
+pub fn encode_struct_with_struct(value: &crate::data::StructWithStruct, writer: &mut impl std::io::Write) -> ::std::io::Result::<()> {
+    crate::data::transient_0::encode_struct_with_int_32(&value.inner, writer)?;
+    crate::transient_0::encode_int_32(&value.c, writer)?;
+    ::std::io::Result::Ok(())
+}
+
+pub fn decode_struct_with_struct(reader: &mut impl std::io::Read) -> ::std::io::Result::<crate::data::StructWithStruct> {
+    let inner = crate::data::transient_0::decode_struct_with_int_32(reader)?;
+    let c = crate::transient_0::decode_int_32(reader)?;
+    std::io::Result::Ok(crate::data::StructWithStruct { inner: inner, c: c })
+}
+
+pub fn encode_struct_with_list(value: &crate::data::StructWithList, writer: &mut impl std::io::Write) -> ::std::io::Result::<()> {
+    {
+        crate::transient_0::encode_int_64(&(((&value.a).len()).try_into()).map_err(|error| ::std::io::Error::new(::std::io::ErrorKind::InvalidData, error))?, writer)?;
+        for element in &value.a {
+            crate::transient_0::encode_int_64(element, writer)?;
+        };
+    };
+    {
+        crate::transient_0::encode_int_64(&(((&value.b).len()).try_into()).map_err(|error| ::std::io::Error::new(::std::io::ErrorKind::InvalidData, error))?, writer)?;
+        for element in &value.b {
+            crate::data::transient_0::encode_struct_with_int_32(element, writer)?;
+        };
+    };
+    ::std::io::Result::Ok(())
+}
+
+pub fn decode_struct_with_list(reader: &mut impl std::io::Read) -> ::std::io::Result::<crate::data::StructWithList> {
+    let a = {
+        let len = crate::transient_0::decode_int_64(reader)?;
+        let mut elements = ::std::vec::Vec::with_capacity((len.try_into()).map_err(|error| ::std::io::Error::new(::std::io::ErrorKind::InvalidData, error))?);
+        for _ in 0..len {
+            elements.push(crate::transient_0::decode_int_64(reader)?);
+        };
+        elements
+    };
+    let b = {
+        let len = crate::transient_0::decode_int_64(reader)?;
+        let mut elements = ::std::vec::Vec::with_capacity((len.try_into()).map_err(|error| ::std::io::Error::new(::std::io::ErrorKind::InvalidData, error))?);
+        for _ in 0..len {
+            elements.push(crate::data::transient_0::decode_struct_with_int_32(reader)?);
+        };
+        elements
+    };
+    std::io::Result::Ok(crate::data::StructWithList { a: a, b: b })
+}
+
+pub fn encode_struct_with_option(value: &crate::data::StructWithOption, writer: &mut impl std::io::Write) -> ::std::io::Result::<()> {
+    match &value.a {
+        ::std::option::Option::Some(value) => {
+            crate::transient_0::encode_bool(&true, writer)?;
+            crate::transient_0::encode_int_64(&value, writer)?;
+        },
+        ::std::option::Option::None => {
+            crate::transient_0::encode_bool(&false, writer)?;
+        },
+    };
+    match &value.b {
+        ::std::option::Option::Some(value) => {
+            crate::transient_0::encode_bool(&true, writer)?;
+            crate::data::transient_0::encode_struct_with_int_32(&value, writer)?;
+        },
+        ::std::option::Option::None => {
+            crate::transient_0::encode_bool(&false, writer)?;
+        },
+    };
+    ::std::io::Result::Ok(())
+}
+
+pub fn decode_struct_with_option(reader: &mut impl std::io::Read) -> ::std::io::Result::<crate::data::StructWithOption> {
+    let a = {
+        let is_some = crate::transient_0::decode_bool(reader)?;
+        if is_some {
+            ::std::option::Option::Some(crate::transient_0::decode_int_64(reader)?)
+        } else {
+            ::std::option::Option::None
+        }
+    };
+    let b = {
+        let is_some = crate::transient_0::decode_bool(reader)?;
+        if is_some {
+            ::std::option::Option::Some(crate::data::transient_0::decode_struct_with_int_32(reader)?)
+        } else {
+            ::std::option::Option::None
+        }
+    };
+    std::io::Result::Ok(crate::data::StructWithOption { a: a, b: b })
+}
+
+pub fn encode_enum_with_variants(value: &crate::data::EnumWithVariants, writer: &mut impl std::io::Write) -> ::std::io::Result::<()> {
+    crate::transient_0::encode_int_32(&match value {
+        crate::data::EnumWithVariants::Zero => 0,
+        crate::data::EnumWithVariants::One => 1,
+        crate::data::EnumWithVariants::Two => 2,
+    }, writer)?;
+    ::std::io::Result::Ok(())
+}
+
+pub fn decode_enum_with_variants(reader: &mut impl std::io::Read) -> ::std::io::Result::<crate::data::EnumWithVariants> {
+    std::io::Result::Ok(match &crate::transient_0::decode_int_32(reader)? {
+        0 => crate::data::EnumWithVariants::Zero,
+        1 => crate::data::EnumWithVariants::One,
+        2 => crate::data::EnumWithVariants::Two,
+        _ => todo!(),
+    })
+}
+
+pub fn encode_struct_with_enum(value: &crate::data::StructWithEnum, writer: &mut impl std::io::Write) -> ::std::io::Result::<()> {
+    crate::data::transient_0::encode_enum_with_variants(&value.inner, writer)?;
+    crate::transient_0::encode_int_32(&value.c, writer)?;
+    ::std::io::Result::Ok(())
+}
+
+pub fn decode_struct_with_enum(reader: &mut impl std::io::Read) -> ::std::io::Result::<crate::data::StructWithEnum> {
+    let inner = crate::data::transient_0::decode_enum_with_variants(reader)?;
+    let c = crate::transient_0::decode_int_32(reader)?;
+    std::io::Result::Ok(crate::data::StructWithEnum { inner: inner, c: c })
+}
+
+pub fn encode_sum_with_variants(value: &crate::data::SumWithVariants, writer: &mut impl std::io::Write) -> ::std::io::Result::<()> {
+    match value {
+        crate::data::SumWithVariants::VariantOne(value) => {
+            crate::transient_0::encode_int_32(&0, writer)?;
+            crate::data::transient_0::encode_variant_one(value, writer)?;
+        },
+        crate::data::SumWithVariants::VariantTwo(value) => {
+            crate::transient_0::encode_int_32(&1, writer)?;
+            crate::data::transient_0::encode_variant_two(value, writer)?;
+        },
+    };
+    ::std::io::Result::Ok(())
+}
+
+pub fn decode_sum_with_variants(reader: &mut impl std::io::Read) -> ::std::io::Result::<crate::data::SumWithVariants> {
+    std::io::Result::Ok(match &crate::transient_0::decode_int_32(reader)? {
+        0 => crate::data::SumWithVariants::VariantOne(crate::data::transient_0::decode_variant_one(reader)?),
+        1 => crate::data::SumWithVariants::VariantTwo(crate::data::transient_0::decode_variant_two(reader)?),
+        _ => todo!(),
+    })
+}
+
+pub fn encode_variant_one(value: &crate::data::VariantOne, writer: &mut impl std::io::Write) -> ::std::io::Result::<()> {
+    crate::transient_0::encode_int_32(&value.a, writer)?;
+    ::std::io::Result::Ok(())
+}
+
+pub fn decode_variant_one(reader: &mut impl std::io::Read) -> ::std::io::Result::<crate::data::VariantOne> {
+    let a = crate::transient_0::decode_int_32(reader)?;
+    std::io::Result::Ok(crate::data::VariantOne { a: a })
+}
+
+pub fn encode_variant_two(value: &crate::data::VariantTwo, writer: &mut impl std::io::Write) -> ::std::io::Result::<()> {
+    crate::transient_0::encode_int_64(&value.a, writer)?;
+    ::std::io::Result::Ok(())
+}
+
+pub fn decode_variant_two(reader: &mut impl std::io::Read) -> ::std::io::Result::<crate::data::VariantTwo> {
+    let a = crate::transient_0::decode_int_64(reader)?;
+    std::io::Result::Ok(crate::data::VariantTwo { a: a })
+}
+
+pub fn encode_struct_with_sum(value: &crate::data::StructWithSum, writer: &mut impl std::io::Write) -> ::std::io::Result::<()> {
+    crate::data::transient_0::encode_sum_with_variants(&value.inner, writer)?;
+    crate::transient_0::encode_int_32(&value.b, writer)?;
+    ::std::io::Result::Ok(())
+}
+
+pub fn decode_struct_with_sum(reader: &mut impl std::io::Read) -> ::std::io::Result::<crate::data::StructWithSum> {
+    let inner = crate::data::transient_0::decode_sum_with_variants(reader)?;
+    let b = crate::transient_0::decode_int_32(reader)?;
+    std::io::Result::Ok(crate::data::StructWithSum { inner: inner, b: b })
+}
diff --git a/examples/11-transient-0/output/rust/src/gen/transient_0.rs b/examples/11-transient-0/output/rust/src/gen/transient_0.rs
new file mode 100644
index 0000000..560fe51
--- /dev/null
+++ b/examples/11-transient-0/output/rust/src/gen/transient_0.rs
@@ -0,0 +1,70 @@
+// Generated by hobgoblin.
+
+pub fn encode_bool(value: &::core::primitive::bool, writer: &mut impl std::io::Write) -> ::std::io::Result::<()> {
+    if *value {
+        writer.write_all(&1u8.to_le_bytes())?;
+    } else {
+        writer.write_all(&0u8.to_le_bytes())?;
+    };
+    ::std::io::Result::Ok(())
+}
+
+pub fn decode_bool(reader: &mut impl std::io::Read) -> ::std::io::Result::<::core::primitive::bool> {
+    let int_value = {
+        let bytes = {
+            let mut bytes = [0; 1];
+            reader.read_exact(&mut bytes)?;
+            bytes
+        };
+        u8::from_le_bytes(bytes)
+    };
+    std::io::Result::Ok(if int_value == 0 {
+        false
+    } else {
+        true
+    })
+}
+
+pub fn encode_int_32(value: &::core::primitive::i32, writer: &mut impl std::io::Write) -> ::std::io::Result::<()> {
+    writer.write_all(&value.to_le_bytes())?;
+    ::std::io::Result::Ok(())
+}
+
+pub fn decode_int_32(reader: &mut impl std::io::Read) -> ::std::io::Result::<::core::primitive::i32> {
+    let bytes = {
+        let mut bytes = [0; 4];
+        reader.read_exact(&mut bytes)?;
+        bytes
+    };
+    std::io::Result::Ok(::core::primitive::i32::from_le_bytes(bytes))
+}
+
+pub fn encode_int_64(value: &::core::primitive::i64, writer: &mut impl std::io::Write) -> ::std::io::Result::<()> {
+    writer.write_all(&value.to_le_bytes())?;
+    ::std::io::Result::Ok(())
+}
+
+pub fn decode_int_64(reader: &mut impl std::io::Read) -> ::std::io::Result::<::core::primitive::i64> {
+    let bytes = {
+        let mut bytes = [0; 8];
+        reader.read_exact(&mut bytes)?;
+        bytes
+    };
+    std::io::Result::Ok(::core::primitive::i64::from_le_bytes(bytes))
+}
+
+pub fn encode_string(value: &::std::string::String, writer: &mut impl std::io::Write) -> ::std::io::Result::<()> {
+    crate::transient_0::encode_int_64(&((value.len()).try_into()).map_err(|error| ::std::io::Error::new(::std::io::ErrorKind::InvalidData, error))?, writer)?;
+    writer.write_all(value.as_bytes())?;
+    ::std::io::Result::Ok(())
+}
+
+pub fn decode_string(reader: &mut impl std::io::Read) -> ::std::io::Result::<::std::string::String> {
+    let len = crate::transient_0::decode_int_64(reader)?;
+    let bytes = {
+        let mut bytes = vec![0u8; (len.try_into()).map_err(|error| ::std::io::Error::new(::std::io::ErrorKind::InvalidData, error))?];
+        reader.read_exact(&mut bytes)?;
+        bytes
+    };
+    std::io::Result::Ok((::std::string::String::from_utf8(bytes)).map_err(|error| ::std::io::Error::new(::std::io::ErrorKind::InvalidData, error))?)
+}
diff --git a/examples/11-transient-0/output/rust/src/lib.rs b/examples/11-transient-0/output/rust/src/lib.rs
new file mode 100644
index 0000000..e31e1fb
--- /dev/null
+++ b/examples/11-transient-0/output/rust/src/lib.rs
@@ -0,0 +1,184 @@
+pub mod data;
+pub mod transient_0;
+
+#[cfg(test)]
+mod test {
+    use std::io::Cursor;
+    use super::data::{EnumWithVariants, StructWithBool, StructWithEnum, StructWithInt32, StructWithInt64, StructWithList, StructWithOption, StructWithString, StructWithStruct, StructWithSum, SumWithVariants, VariantOne, VariantTwo };
+
+    #[test]
+    fn struct_with_bool() {
+        let value = StructWithBool { a: true, b: false };
+
+        assert_round_trip_encoding(
+            value,
+            super::data::transient_0::encode_struct_with_bool,
+            super::data::transient_0::decode_struct_with_bool,
+        );
+    }
+
+    #[test]
+    fn struct_with_int_32() {
+        let value = StructWithInt32 { a: 10, b: 25 };
+
+        assert_round_trip_encoding(
+            value,
+            super::data::transient_0::encode_struct_with_int_32,
+            super::data::transient_0::decode_struct_with_int_32,
+        );
+    }
+
+    #[test]
+    fn struct_with_int_64() {
+        let value = StructWithInt64 { a: 10, b: 25 };
+
+        assert_round_trip_encoding(
+            value,
+            super::data::transient_0::encode_struct_with_int_64,
+            super::data::transient_0::decode_struct_with_int_64,
+        );
+    }
+
+    #[test]
+    fn struct_with_string() {
+        let value = StructWithString { a: "abc".to_string(), b: "def".to_string() };
+
+        assert_round_trip_encoding(
+            value,
+            super::data::transient_0::encode_struct_with_string,
+            super::data::transient_0::decode_struct_with_string,
+        );
+    }
+
+    #[test]
+    fn struct_with_struct() {
+        let value = StructWithStruct { inner: StructWithInt32 { a: 10, b: 25 }, c: 42 };
+
+        assert_round_trip_encoding(
+            value,
+            super::data::transient_0::encode_struct_with_struct,
+            super::data::transient_0::decode_struct_with_struct,
+        );
+    }
+
+    #[test]
+    fn struct_with_list() {
+        let value = StructWithList {
+            a: vec![10, 25],
+            b: vec![
+                StructWithInt32 { a: 42, b: 47 },
+                StructWithInt32 { a: 52, b: 57 },
+                StructWithInt32 { a: 62, b: 67 },
+            ],
+        };
+
+        assert_round_trip_encoding(
+            value,
+            super::data::transient_0::encode_struct_with_list,
+            super::data::transient_0::decode_struct_with_list,
+        );
+    }
+
+    #[test]
+    fn struct_with_option_none() {
+        let value = StructWithOption {
+            a: None,
+            b: None,
+        };
+
+        assert_round_trip_encoding(
+            value,
+            super::data::transient_0::encode_struct_with_option,
+            super::data::transient_0::decode_struct_with_option,
+        );
+    }
+
+    #[test]
+    fn struct_with_option_some() {
+        let value = StructWithOption {
+            a: Some(10),
+            b: Some(StructWithInt32 { a: 42, b: 47 }),
+        };
+
+        assert_round_trip_encoding(
+            value,
+            super::data::transient_0::encode_struct_with_option,
+            super::data::transient_0::decode_struct_with_option,
+        );
+    }
+
+    #[test]
+    fn enum_with_variants() {
+        assert_round_trip_encoding(
+            EnumWithVariants::Zero,
+            super::data::transient_0::encode_enum_with_variants,
+            super::data::transient_0::decode_enum_with_variants,
+        );
+
+        assert_round_trip_encoding(
+            EnumWithVariants::One,
+            super::data::transient_0::encode_enum_with_variants,
+            super::data::transient_0::decode_enum_with_variants,
+        );
+
+        assert_round_trip_encoding(
+            EnumWithVariants::Two,
+            super::data::transient_0::encode_enum_with_variants,
+            super::data::transient_0::decode_enum_with_variants,
+        );
+    }
+
+    #[test]
+    fn struct_with_enum() {
+        let value = StructWithEnum { inner: EnumWithVariants::One, c: 42 };
+
+        assert_round_trip_encoding(
+            value,
+            super::data::transient_0::encode_struct_with_enum,
+            super::data::transient_0::decode_struct_with_enum,
+        );
+    }
+
+    #[test]
+    fn sum_with_variants() {
+        assert_round_trip_encoding(
+            SumWithVariants::VariantOne(VariantOne { a: 10 }),
+            super::data::transient_0::encode_sum_with_variants,
+            super::data::transient_0::decode_sum_with_variants,
+        );
+
+        assert_round_trip_encoding(
+            SumWithVariants::VariantTwo(VariantTwo { a: 25 }),
+            super::data::transient_0::encode_sum_with_variants,
+            super::data::transient_0::decode_sum_with_variants,
+        );
+    }
+
+    #[test]
+    fn struct_with_sum() {
+        let value = StructWithSum {
+            inner: SumWithVariants::VariantTwo(VariantTwo { a: 25 }),
+            b: 42,
+        };
+
+        assert_round_trip_encoding(
+            value,
+            super::data::transient_0::encode_struct_with_sum,
+            super::data::transient_0::decode_struct_with_sum,
+        );
+    }
+
+    fn assert_round_trip_encoding<T: std::cmp::PartialEq + std::fmt::Debug>(
+        value: T,
+        encode: impl Fn(&T, &mut Cursor<Vec<u8>>) -> std::io::Result<()>,
+        decode: impl Fn(&mut Cursor<Vec<u8>>) -> std::io::Result<T>,
+    ) {
+        let mut bytes = Cursor::new(Vec::new());
+        encode(&value, &mut bytes).unwrap();
+
+        bytes.set_position(0);
+        let decoded_value = decode(&mut bytes).unwrap();
+
+        assert_eq!(value, decoded_value);
+    }
+}
diff --git a/examples/11-transient-0/output/rust/src/transient_0.rs b/examples/11-transient-0/output/rust/src/transient_0.rs
new file mode 100644
index 0000000..8b2b800
--- /dev/null
+++ b/examples/11-transient-0/output/rust/src/transient_0.rs
@@ -0,0 +1 @@
+include!("./gen/transient_0.rs");