From 00cfa7a56b31f0b629a54a77e1934d25471f8156 Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Fri, 14 Aug 2026 11:01:46 +0100
Subject: Add type params to struct in Rust AST

---
 .../compiler/output/lang/rust/RustWriterTests.java       | 16 ++++++++++++++++
 .../output/lang/rust/ast/RustStructStructMatcher.java    |  6 ++++++
 2 files changed, 22 insertions(+)

(limited to 'src/test/java/org/zwobble')

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 b8179f2..feabc12 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
@@ -212,6 +212,22 @@ public class RustWriterTests {
             pub struct Rectangle;"""));
     }
 
+    @Test
+    public void structWithTypeParams() throws IOException {
+        var rust = RustStructStruct.arbitrary()
+            .withName(RustIdentifier.of("X"))
+            .addTypeParam(RustTypeParam.arbitrary().withName(RustIdentifier.of("T1")))
+            .addTypeParam(RustTypeParam.arbitrary().withName(RustIdentifier.of("T2")))
+            .withFields(List.of())
+            .build();
+
+        var string = write(writer -> writer.writeItem(rust));
+
+        assertThat(string, equalTo("""
+            pub struct X<T1, T2> {
+            }"""));
+    }
+
     @Test
     public void structWithFields() throws IOException {
         var rust = RustStructStruct.arbitrary()
diff --git a/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustStructStructMatcher.java b/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustStructStructMatcher.java
index b4c984d..b10f3c6 100644
--- a/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustStructStructMatcher.java
+++ b/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustStructStructMatcher.java
@@ -42,6 +42,12 @@ public final class RustStructStructMatcher implements org.zwobble.precisely.Matc
         return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustStructStructMatcher(submatchers);
     }
 
+    public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustStructStructMatcher withTypeParams(org.zwobble.precisely.Matcher<? super java.util.List<org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypeParam>> typeParams) {
+        var submatchers = new java.util.ArrayList<org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustStructStruct>>(this.submatchers);
+        submatchers.add(org.zwobble.precisely.Matchers.has("typeParams", org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustStructStruct::typeParams, typeParams));
+        return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustStructStructMatcher(submatchers);
+    }
+
     public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustStructStructMatcher withFields(org.zwobble.precisely.Matcher<? super java.util.Optional<java.util.List<org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustStructField>>> fields) {
         var submatchers = new java.util.ArrayList<org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustStructStruct>>(this.submatchers);
         submatchers.add(org.zwobble.precisely.Matchers.has("fields", org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustStructStruct::fields, fields));
-- 
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