From 051ea60dc8a775f0fc82ebbc5f65a8c5f57157c0 Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Sat, 25 Jul 2026 23:48:53 +0100
Subject: Add type cases to Rust AST

---
 .../compiler/output/lang/rust/RustWriterTests.java | 14 +++++++
 .../rust/ast/RustTypeCastExpressionMatcher.java    | 45 ++++++++++++++++++++++
 2 files changed, 59 insertions(+)
 create mode 100644 src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustTypeCastExpressionMatcher.java

(limited to 'src/test')

diff --git a/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/RustWriterTests.java b/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/RustWriterTests.java
index fe1f9b4..55c8f54 100644
--- a/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/RustWriterTests.java
+++ b/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/RustWriterTests.java
@@ -842,6 +842,20 @@ public class RustWriterTests {
         assertThat(string, equalTo("(a, b, c)"));
     }
 
+    // === Type cast expressions ===
+
+    @Test
+    public void typeCastExpression() throws IOException {
+        var rust = RustTypeCastExpression.arbitrary()
+            .withLeft(RustPath.of("a"))
+            .withRight(RustPath.of("X"))
+            .build();
+
+        var string = write(writer -> writer.writeTopLevelExpression(rust));
+
+        assertThat(string, equalTo("a as X"));
+    }
+
     // === Vec repeat expressions ===
 
     @Test
diff --git a/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustTypeCastExpressionMatcher.java b/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustTypeCastExpressionMatcher.java
new file mode 100644
index 0000000..2ff190e
--- /dev/null
+++ b/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustTypeCastExpressionMatcher.java
@@ -0,0 +1,45 @@
+// Generated by hobgoblin.
+
+package org.zwobble.hobgoblin.compiler.output.lang.rust.ast;
+
+// Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeCastExpressionMatcher imports
+// Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeCastExpressionMatcher imports
+
+public class RustTypeCastExpressionMatcher implements org.zwobble.precisely.Matcher<java.lang.Object> {
+    public static org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeCastExpressionMatcher isRustTypeCastExpression() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeCastExpressionMatcher(java.util.List.of());
+    }
+
+    private final java.util.List<org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeCastExpression>> submatchers;
+
+    private RustTypeCastExpressionMatcher(java.util.List<org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeCastExpression>> 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.rust.ast.RustTypeCastExpression.class, this.submatchers);
+    }
+
+    public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeCastExpressionMatcher withLeft(org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustExpression> left) {
+        var submatchers = new java.util.ArrayList<org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeCastExpression>>(this.submatchers);
+        submatchers.add(org.zwobble.precisely.Matchers.has("left", org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeCastExpression::left, left));
+        return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeCastExpressionMatcher(submatchers);
+    }
+
+    public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeCastExpressionMatcher withRight(org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustType> right) {
+        var submatchers = new java.util.ArrayList<org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeCastExpression>>(this.submatchers);
+        submatchers.add(org.zwobble.precisely.Matchers.has("right", org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeCastExpression::right, right));
+        return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeCastExpressionMatcher(submatchers);
+    }
+
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeCastExpressionMatcher body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeCastExpressionMatcher body
+}
-- 
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