From db1ae9e80a9b330f399f5bdbff8ee402d41a9f0e Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Mon, 10 Aug 2026 10:22:57 +0100
Subject: Extract singleton generation methods

---
 .../generators/javatypes/JavaTypesGenerator.java   | 41 +++++++++++++---------
 1 file changed, 24 insertions(+), 17 deletions(-)

(limited to 'src/main')

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 3dcbd61..709ef12 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
@@ -148,23 +148,8 @@ public class JavaTypesGenerator implements Generator {
         var body = new ArrayList<JavaClassBodyDeclaration>();
 
         if (structDefinition.fields().isEmpty()) {
-            body.add(new JavaFieldDeclaration(
-                JavaVisibility.PUBLIC,
-                JavaMemberKind.STATIC,
-                javaTypeRef,
-                JavaGenerator.INSTANCE_FIELD_NAME,
-                Optional.of(new JavaNewExpression(
-                    javaTypeRef,
-                    List.of()
-                ))
-            ));
-
-            body.add(new JavaConstructorDeclaration(
-                javaTypeRef.typeNames().getLast(),
-                JavaVisibility.PRIVATE,
-                List.of(),
-                new JavaBlock(List.of())
-            ));
+            body.add(generateStructSingletonInstanceField(javaTypeRef));
+            body.add(generateStructSingletonConstructor(javaTypeRef));
         }
 
         body.add(new JavaMethodDeclaration(
@@ -203,6 +188,28 @@ public class JavaTypesGenerator implements Generator {
         }
     }
 
+    private static JavaFieldDeclaration generateStructSingletonInstanceField(JavaTypeRef javaTypeRef) {
+        return new JavaFieldDeclaration(
+            JavaVisibility.PUBLIC,
+            JavaMemberKind.STATIC,
+            javaTypeRef,
+            JavaGenerator.INSTANCE_FIELD_NAME,
+            Optional.of(new JavaNewExpression(
+                javaTypeRef,
+                List.of()
+            ))
+        );
+    }
+
+    private static JavaConstructorDeclaration generateStructSingletonConstructor(JavaTypeRef javaTypeRef) {
+        return new JavaConstructorDeclaration(
+            javaTypeRef.typeNames().getLast(),
+            JavaVisibility.PRIVATE,
+            List.of(),
+            new JavaBlock(List.of())
+        );
+    }
+
     private JavaRecordDeclaration generateStructDefinitionBuilder(
         TypedStructDefinitionNode structDefinition,
         List<JavaRecordComponent> components,
-- 
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