From 0568d7e77dbe004864e19a75a2216e233fbfad2b Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Thu, 2 Jul 2026 10:07:12 +0100
Subject: Support translating enums into Rust types

---
 .../generators/rusttypes/RustTypesGenerator.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/rusttypes/RustTypesGenerator.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/generators/rusttypes/RustTypesGenerator.java
index e681a3e..b71c9ed 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/generators/rusttypes/RustTypesGenerator.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/generators/rusttypes/RustTypesGenerator.java
@@ -80,7 +80,7 @@ public class RustTypesGenerator implements Generator {
     ) {
         return switch (statement) {
             case TypedEnumDefinitionNode enumDefinition -> {
-                yield List.of();
+                yield generateEnumDefinition(enumDefinition, context);
             }
 
             case TypedNativeTypeDefinitionNode nativeTypeDefinition -> {
@@ -97,6 +97,28 @@ public class RustTypesGenerator implements Generator {
         };
     }
 
+    private List<RustItem> generateEnumDefinition(
+        TypedEnumDefinitionNode enumDefinition,
+        Context context
+    ) {
+        var rustEnumName = generateTypeName(enumDefinition.name());
+
+        var rustVariants = enumDefinition.variants().stream()
+            .map(variant -> new RustEnumVariant(
+                generateVariantName(variant.name()),
+                new RustEnumVariantNoFields()
+            ))
+            .toList();
+
+        var rustEnum = new RustEnum(
+            rustEnumName,
+            rustVariants,
+            enumDefinition.docComment()
+        );
+
+        return List.of(rustEnum);
+    }
+
     private List<RustItem> generateStructDefinition(
         TypedStructDefinitionNode structDefinition,
         Context context
@@ -216,13 +238,16 @@ public class RustTypesGenerator implements Generator {
         return new RustIdentifier(Casing.lowerCamelCaseToSnakeCase(part));
     }
 
+    private RustIdentifier generateVariantName(String enumVariantName) {
+        return generateTypeName(Casing.lowerCamelCaseToUpperCamelCase(enumVariantName));
+    }
+
     private RustIdentifier generateVariantName(Type type) {
         if (type instanceof StructType structType) {
             return generateTypeName(structType.name());
         } else {
             throw new UnsupportedOperationException("TODO");
         }
-
     }
 
     private static class Context {
-- 
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