From a8f916ed81731eaba61b2bd1ef6f3b6fb40c23af Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Sun, 12 Jul 2026 17:43:27 +0100
Subject: Add postfix expressions to Java AST

---
 .../compiler/output/lang/java/JavaWriterTests.java | 26 +++++++++++++
 .../java/ast/JavaPostfixExpressionMatcher.java     | 45 ++++++++++++++++++++++
 2 files changed, 71 insertions(+)
 create mode 100644 src/test/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaPostfixExpressionMatcher.java

(limited to 'src/test')

diff --git a/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/java/JavaWriterTests.java b/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/java/JavaWriterTests.java
index b8bfe5c..8eb738a 100644
--- a/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/java/JavaWriterTests.java
+++ b/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/java/JavaWriterTests.java
@@ -1372,6 +1372,32 @@ public class JavaWriterTests {
         assertThat(string, equalTo("null"));
     }
 
+    // === Postfix expressions ===
+
+    @Test
+    public void postfixDecrement() throws IOException {
+        var java = JavaPostfixExpression.arbitrary()
+            .withOperator(JavaPostfixOperator.DECREMENT)
+            .withOperand(JavaRef.arbitrary().withName(JavaIdentifier.of("x")))
+            .build();
+
+        var string = write(writer -> writer.writeTopLevelExpression(java));
+
+        assertThat(string, equalTo("x--"));
+    }
+
+    @Test
+    public void postfixIncrement() throws IOException {
+        var java = JavaPostfixExpression.arbitrary()
+            .withOperator(JavaPostfixOperator.INCREMENT)
+            .withOperand(JavaRef.arbitrary().withName(JavaIdentifier.of("x")))
+            .build();
+
+        var string = write(writer -> writer.writeTopLevelExpression(java));
+
+        assertThat(string, equalTo("x++"));
+    }
+
     // === Refs ===
 
     @Test
diff --git a/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaPostfixExpressionMatcher.java b/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaPostfixExpressionMatcher.java
new file mode 100644
index 0000000..2a0cb13
--- /dev/null
+++ b/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaPostfixExpressionMatcher.java
@@ -0,0 +1,45 @@
+// Generated by hobgoblin.
+
+package org.zwobble.hobgoblin.compiler.output.lang.java.ast;
+
+// Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaPostfixExpressionMatcher imports
+// Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaPostfixExpressionMatcher imports
+
+public class JavaPostfixExpressionMatcher implements org.zwobble.precisely.Matcher<java.lang.Object> {
+    public static org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaPostfixExpressionMatcher isJavaPostfixExpression() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaPostfixExpressionMatcher(java.util.List.of());
+    }
+
+    private final java.util.List<org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaPostfixExpression>> submatchers;
+
+    private JavaPostfixExpressionMatcher(java.util.List<org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaPostfixExpression>> submatchers) {
+        this.submatchers = submatchers;
+    }
+
+    public org.zwobble.precisely.MatchResult match(java.lang.Object actual) {
+        return this.toMatcher().match(actual);
+    }
+
+    public org.zwobble.precisely.TextTree describe() {
+        return this.toMatcher().describe();
+    }
+
+    private org.zwobble.precisely.Matcher<java.lang.Object> toMatcher() {
+        return org.zwobble.precisely.Matchers.instanceOf(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaPostfixExpression.class, this.submatchers);
+    }
+
+    public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaPostfixExpressionMatcher withOperator(org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaPostfixOperator> operator) {
+        var submatchers = new java.util.ArrayList<org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaPostfixExpression>>(this.submatchers);
+        submatchers.add(org.zwobble.precisely.Matchers.has("operator", org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaPostfixExpression::operator, operator));
+        return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaPostfixExpressionMatcher(submatchers);
+    }
+
+    public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaPostfixExpressionMatcher withOperand(org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression> operand) {
+        var submatchers = new java.util.ArrayList<org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaPostfixExpression>>(this.submatchers);
+        submatchers.add(org.zwobble.precisely.Matchers.has("operand", org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaPostfixExpression::operand, operand));
+        return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaPostfixExpressionMatcher(submatchers);
+    }
+
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaPostfixExpressionMatcher body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaPostfixExpressionMatcher body
+}
-- 
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