From 55a43dcbb231ad1d1b38fe1b5ab21c1a2b3dc088 Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Fri, 12 Jun 2026 15:45:13 +0100
Subject: Add Java null literal

---
 .../zwobble/hobgoblin/compiler/output/lang/java/JavaWriter.java   | 8 ++++++++
 .../hobgoblin/compiler/output/lang/java/ast/JavaExpression.java   | 2 +-
 .../hobgoblin/compiler/output/lang/java/ast/JavaNullLiteral.java  | 4 ++++
 3 files changed, 13 insertions(+), 1 deletion(-)
 create mode 100644 src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaNullLiteral.java

(limited to 'src/main/java/org')

diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/JavaWriter.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/JavaWriter.java
index 87da849..d7a5325 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/JavaWriter.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/JavaWriter.java
@@ -148,6 +148,10 @@ public class JavaWriter implements AutoCloseable {
                 writeNewExpression(newExpression);
             }
 
+            case JavaNullLiteral nullLiteral -> {
+                writeNullLiteral(null);
+            }
+
             case JavaRef ref -> {
                 writeRef(ref);
             }
@@ -284,6 +288,10 @@ public class JavaWriter implements AutoCloseable {
         this.writer.write(")");
     }
 
+    private void writeNullLiteral(JavaNullLiteral nullLiteral) throws IOException {
+        this.writer.write("null");
+    }
+
     private void writeRecordDeclaration(JavaRecordDeclaration recordDeclaration) throws IOException {
         writeDocComment(recordDeclaration.docComment());
 
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaExpression.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaExpression.java
index a8cb596..bbc087d 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaExpression.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaExpression.java
@@ -1,4 +1,4 @@
 package org.zwobble.hobgoblin.compiler.output.lang.java.ast;
 
-public sealed interface JavaExpression permits JavaIntegerLiteral, JavaMethodCall, JavaNewExpression, JavaRef, JavaStaticMethodCall, JavaStringLiteral {
+public sealed interface JavaExpression permits JavaIntegerLiteral, JavaMethodCall, JavaNewExpression, JavaNullLiteral, JavaRef, JavaStaticMethodCall, JavaStringLiteral {
 }
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaNullLiteral.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaNullLiteral.java
new file mode 100644
index 0000000..3ce68eb
--- /dev/null
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaNullLiteral.java
@@ -0,0 +1,4 @@
+package org.zwobble.hobgoblin.compiler.output.lang.java.ast;
+
+public record JavaNullLiteral() implements JavaExpression {
+}
-- 
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