From 0df2137ae4f03069398f6417d46d9a6d5bea1ce2 Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Tue, 28 Apr 2026 23:38:42 +0100
Subject: Add TypedSumDefinitionNode

---
 .../compiler/ast/typed/TypedNamespaceStatementNode.java  |  2 +-
 .../compiler/ast/typed/TypedSumDefinitionNode.java       | 16 ++++++++++++++++
 .../ast/typed/TypedSumVariantDefinitionNode.java         | 10 ++++++++++
 .../output/generators/javatypes/JavaTypesGenerator.java  |  5 +++++
 4 files changed, 32 insertions(+), 1 deletion(-)
 create mode 100644 src/main/java/org/zwobble/hobgoblin/compiler/ast/typed/TypedSumDefinitionNode.java
 create mode 100644 src/main/java/org/zwobble/hobgoblin/compiler/ast/typed/TypedSumVariantDefinitionNode.java

diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/ast/typed/TypedNamespaceStatementNode.java b/src/main/java/org/zwobble/hobgoblin/compiler/ast/typed/TypedNamespaceStatementNode.java
index 79dc0bb..6cab80c 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/ast/typed/TypedNamespaceStatementNode.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/ast/typed/TypedNamespaceStatementNode.java
@@ -1,4 +1,4 @@
 package org.zwobble.hobgoblin.compiler.ast.typed;
 
-public sealed interface TypedNamespaceStatementNode extends TypedNode permits TypedStructDefinitionNode {
+public sealed interface TypedNamespaceStatementNode extends TypedNode permits TypedStructDefinitionNode, TypedSumDefinitionNode {
 }
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/ast/typed/TypedSumDefinitionNode.java b/src/main/java/org/zwobble/hobgoblin/compiler/ast/typed/TypedSumDefinitionNode.java
new file mode 100644
index 0000000..e04e2dd
--- /dev/null
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/ast/typed/TypedSumDefinitionNode.java
@@ -0,0 +1,16 @@
+package org.zwobble.hobgoblin.compiler.ast.typed;
+
+import org.zwobble.hobgoblin.compiler.sources.Source;
+import org.zwobble.hobgoblin.compiler.types.SumType;
+
+import java.util.List;
+
+public record TypedSumDefinitionNode(
+    SumType type,
+    List<TypedSumVariantDefinitionNode> variants,
+    Source source
+) implements TypedNamespaceStatementNode {
+    public String name() {
+        return this.type.name();
+    }
+}
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/ast/typed/TypedSumVariantDefinitionNode.java b/src/main/java/org/zwobble/hobgoblin/compiler/ast/typed/TypedSumVariantDefinitionNode.java
new file mode 100644
index 0000000..5c2dd6c
--- /dev/null
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/ast/typed/TypedSumVariantDefinitionNode.java
@@ -0,0 +1,10 @@
+package org.zwobble.hobgoblin.compiler.ast.typed;
+
+import org.zwobble.hobgoblin.compiler.sources.Source;
+import org.zwobble.hobgoblin.compiler.types.Type;
+
+public record TypedSumVariantDefinitionNode(
+    TypedTypeLevelExpressionNode<Type> type,
+    Source source
+) implements TypedNode {
+}
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/generators/javatypes/JavaTypesGenerator.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/generators/javatypes/JavaTypesGenerator.java
index 71fdba9..41070ef 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/generators/javatypes/JavaTypesGenerator.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/generators/javatypes/JavaTypesGenerator.java
@@ -2,6 +2,7 @@ package org.zwobble.hobgoblin.compiler.output.generators.javatypes;
 
 import org.zwobble.hobgoblin.compiler.ast.typed.TypedNamespaceNode;
 import org.zwobble.hobgoblin.compiler.ast.typed.TypedStructDefinitionNode;
+import org.zwobble.hobgoblin.compiler.ast.typed.TypedSumDefinitionNode;
 import org.zwobble.hobgoblin.compiler.ast.typed.TypedTypeLevelExpressionNode;
 import org.zwobble.hobgoblin.compiler.builtins.BuiltinTypes;
 import org.zwobble.hobgoblin.compiler.output.CodeWriter;
@@ -64,6 +65,10 @@ public class JavaTypesGenerator implements Generator {
                         throw new RuntimeException(e);
                     }
                 }
+
+                case TypedSumDefinitionNode sumDefinition -> {
+                    throw new UnsupportedOperationException("TODO");
+                }
             }
         }
     }
-- 
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