From 104245a9b01c379cca76c3114702415d7d296563 Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Sun, 19 Jul 2026 17:54:59 +0100
Subject: Support enums in rust-transient-0

---
 .../output/rust/src/gen/data/transient_0.rs        | 18 +++++++++++++++++
 examples/10-transient-0/output/rust/src/lib.rs     | 23 +++++++++++++++++++++-
 2 files changed, 40 insertions(+), 1 deletion(-)

(limited to 'examples/10-transient-0/output/rust/src')

diff --git a/examples/10-transient-0/output/rust/src/gen/data/transient_0.rs b/examples/10-transient-0/output/rust/src/gen/data/transient_0.rs
index c5bb458..fbfc82d 100644
--- a/examples/10-transient-0/output/rust/src/gen/data/transient_0.rs
+++ b/examples/10-transient-0/output/rust/src/gen/data/transient_0.rs
@@ -152,6 +152,24 @@ pub fn decode_struct_with_option(reader: &mut impl std::io::Read) -> ::std::io::
     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_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(())
diff --git a/examples/10-transient-0/output/rust/src/lib.rs b/examples/10-transient-0/output/rust/src/lib.rs
index 3de2597..c3da14c 100644
--- a/examples/10-transient-0/output/rust/src/lib.rs
+++ b/examples/10-transient-0/output/rust/src/lib.rs
@@ -4,7 +4,7 @@ pub mod transient_0;
 #[cfg(test)]
 mod test {
     use std::io::Cursor;
-    use super::data::{InnerStruct, OuterStruct, StructWithBool, StructWithInt32, StructWithInt64, StructWithList, StructWithOption, StructWithString};
+    use super::data::{EnumWithVariants, InnerStruct, OuterStruct, StructWithBool, StructWithInt32, StructWithInt64, StructWithList, StructWithOption, StructWithString};
 
     #[test]
     fn struct_with_bool() {
@@ -107,6 +107,27 @@ mod test {
         );
     }
 
+    #[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,
+        );
+    }
+
     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<()>,
-- 
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