From ca6307a275a2ab20c2606cea9a916e22225599dd Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Sun, 5 Jul 2026 11:32:05 +0100
Subject: Support nested structs in transient-0

---
 .../javatransient0/JavaTransient0Generator.java    | 29 ++++++++++++++++++++--
 1 file changed, 27 insertions(+), 2 deletions(-)

(limited to 'src/main')

diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/generators/javatransient0/JavaTransient0Generator.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/generators/javatransient0/JavaTransient0Generator.java
index 1695da7..a8bacbf 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/generators/javatransient0/JavaTransient0Generator.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/generators/javatransient0/JavaTransient0Generator.java
@@ -95,6 +95,13 @@ public class JavaTransient0Generator implements Generator {
         );
     }
 
+    private JavaTypeRef generateTransient0TypeRef(NamespaceName namespaceName) {
+        return JavaTypeRef.topLevel(
+            this.javaGenerator.namespaceToJavaPackageName(namespaceName),
+            generateTransient0ClassName(namespaceName)
+        );
+    }
+
     private JavaIdentifier generateTransient0ClassName(NamespaceName namespaceName) {
         var namespaceShortName = namespaceName.shortName();
         return this.javaGenerator.generateTypeName(
@@ -203,7 +210,15 @@ public class JavaTransient0Generator implements Generator {
             }
 
             case StructType structType ->  {
-                throw new UnsupportedOperationException("TODO");
+                yield Stream.of(
+                    new JavaExpressionStatement(
+                        new JavaStaticMethodCall(
+                            generateTransient0TypeRef(structType.namespaceName()),
+                            encodeMethodName(structType),
+                            List.of(value, new JavaRef(OUTPUT_STREAM_NAME))
+                        )
+                    )
+                );
             }
 
             case SumType sumType ->  {
@@ -241,7 +256,17 @@ public class JavaTransient0Generator implements Generator {
             }
 
             case StructType structType ->  {
-                throw new UnsupportedOperationException("TODO");
+                yield Stream.of(
+                    new JavaLocalVariableDeclaration(
+                        Optional.empty(),
+                        target,
+                        new JavaStaticMethodCall(
+                            generateTransient0TypeRef(structType.namespaceName()),
+                            decodeMethodName(structType),
+                            List.of(new JavaRef(INPUT_STREAM_NAME))
+                        )
+                    )
+                );
             }
 
             case SumType sumType ->  {
-- 
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