Add rust enums

12 files changed, 423 insertions, 1 deletions

diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/RustWriter.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/RustWriter.java
index 514e3f5..51de98a 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/RustWriter.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/RustWriter.java
@@ -56,12 +56,52 @@ public class RustWriter implements AutoCloseable {
 
     void writeItem(RustItem item) throws IOException {
         switch (item) {
+            case RustEnum enum_ -> {
+                writeEnum(enum_);
+            }
+
             case RustStructStruct structStruct -> {
                 writeStructStruct(structStruct);
             }
         }
     }
 
+    private void writeEnum(RustEnum enum_) throws IOException {
+        this.writeDocComment(enum_.docComment());
+        this.writer.write("pub enum ");
+        this.writeIdentifier(enum_.name());
+        this.writer.write(" {");
+
+        if (!enum_.variants().isEmpty()) {
+            this.writer.indent();
+
+            for (var variant : enum_.variants()) {
+                this.writer.newLine();
+                writeIdentifier(variant.name());
+                this.writer.write("(");
+
+                switch (variant.fields()) {
+                    case RustEnumVariantTuple tuple -> {
+                        writeWithSeparator(
+                            tuple.fields(),
+                            field -> {
+                                this.writeType(field.type());
+                            },
+                            () -> this.writer.write(", ")
+                        );
+                    }
+                }
+
+                this.writer.write("),");
+            }
+
+            this.writer.dedent();
+        }
+
+        this.writer.newLine();
+        this.writer.write("}");
+    }
+
     private void writeStructStruct(RustStructStruct structStruct) throws IOException {
         this.writeDocComment(structStruct.docComment());
         this.writer.write("pub struct ");
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustEnum.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustEnum.java
new file mode 100644
index 0000000..338bdb4
--- /dev/null
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustEnum.java
@@ -0,0 +1,40 @@
+// Generated by hobgoblin.
+
+package org.zwobble.hobgoblin.compiler.output.lang.rust.ast;
+
+// Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnum imports
+// Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnum imports
+
+public record RustEnum(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustIdentifier name, java.util.List<org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariant> variants, org.zwobble.hobgoblin.compiler.ast.DocComment docComment) implements org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustItem {
+    public static org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnum.Builder arbitrary() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnum.Builder(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustIdentifier.arbitrary().build(), java.util.List.of(), org.zwobble.hobgoblin.compiler.ast.HobgoblinNativeAst.arbitraryDocComment());
+    }
+
+    public record Builder(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustIdentifier name, java.util.List<org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariant> variants, org.zwobble.hobgoblin.compiler.ast.DocComment docComment) implements org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustItem.Builder {
+        public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnum build() {
+            return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnum(name, variants, docComment);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnum.Builder withName(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustIdentifier name) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnum.Builder(name, variants, docComment);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnum.Builder withName(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustIdentifier.Builder name) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnum.Builder(name.build(), variants, docComment);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnum.Builder withVariants(java.util.List<org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariant> variants) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnum.Builder(name, variants, docComment);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnum.Builder withDocComment(org.zwobble.hobgoblin.compiler.ast.DocComment docComment) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnum.Builder(name, variants, docComment);
+        }
+
+        // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnum.Builder body
+        // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnum.Builder body
+    }
+
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnum body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnum body
+}
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustEnumVariant.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustEnumVariant.java
new file mode 100644
index 0000000..3eff7a1
--- /dev/null
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustEnumVariant.java
@@ -0,0 +1,40 @@
+// Generated by hobgoblin.
+
+package org.zwobble.hobgoblin.compiler.output.lang.rust.ast;
+
+// Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariant imports
+// Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariant imports
+
+public record RustEnumVariant(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustIdentifier name, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantFields fields) {
+    public static org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariant.Builder arbitrary() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariant.Builder(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustIdentifier.arbitrary().build(), org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantTuple.arbitrary().build());
+    }
+
+    public record Builder(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustIdentifier name, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantFields fields) {
+        public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariant build() {
+            return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariant(name, fields);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariant.Builder withName(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustIdentifier name) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariant.Builder(name, fields);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariant.Builder withName(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustIdentifier.Builder name) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariant.Builder(name.build(), fields);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariant.Builder withFields(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantFields fields) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariant.Builder(name, fields);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariant.Builder withFields(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantFields.Builder fields) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariant.Builder(name, fields.build());
+        }
+
+        // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariant.Builder body
+        // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariant.Builder body
+    }
+
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariant body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariant body
+}
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustEnumVariantFields.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustEnumVariantFields.java
new file mode 100644
index 0000000..56d39e6
--- /dev/null
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustEnumVariantFields.java
@@ -0,0 +1,18 @@
+// Generated by hobgoblin.
+
+package org.zwobble.hobgoblin.compiler.output.lang.rust.ast;
+
+// Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantFields imports
+// Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantFields imports
+
+public sealed interface RustEnumVariantFields permits org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantTuple {
+    public interface Builder {
+        public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantFields build();
+
+        // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantFields.Builder body
+        // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantFields.Builder body
+    }
+
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantFields body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantFields body
+}
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustEnumVariantTuple.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustEnumVariantTuple.java
new file mode 100644
index 0000000..a8b1e68
--- /dev/null
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustEnumVariantTuple.java
@@ -0,0 +1,28 @@
+// Generated by hobgoblin.
+
+package org.zwobble.hobgoblin.compiler.output.lang.rust.ast;
+
+// Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantTuple imports
+// Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantTuple imports
+
+public record RustEnumVariantTuple(java.util.List<org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTupleField> fields) implements org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantFields {
+    public static org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantTuple.Builder arbitrary() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantTuple.Builder(java.util.List.of());
+    }
+
+    public record Builder(java.util.List<org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTupleField> fields) implements org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantFields.Builder {
+        public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantTuple build() {
+            return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantTuple(fields);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantTuple.Builder withFields(java.util.List<org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTupleField> fields) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantTuple.Builder(fields);
+        }
+
+        // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantTuple.Builder body
+        // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantTuple.Builder body
+    }
+
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantTuple body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantTuple body
+}
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustItem.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustItem.java
index d1fa342..4471b49 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustItem.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustItem.java
@@ -5,7 +5,7 @@ package org.zwobble.hobgoblin.compiler.output.lang.rust.ast;
 // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustItem imports
 // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustItem imports
 
-public sealed interface RustItem permits org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustStructStruct {
+public sealed interface RustItem permits org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnum, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustStructStruct {
     public interface Builder {
         public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustItem build();
 
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustTupleField.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustTupleField.java
new file mode 100644
index 0000000..4a2eb76
--- /dev/null
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustTupleField.java
@@ -0,0 +1,32 @@
+// Generated by hobgoblin.
+
+package org.zwobble.hobgoblin.compiler.output.lang.rust.ast;
+
+// Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTupleField imports
+// Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTupleField imports
+
+public record RustTupleField(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustType type) {
+    public static org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTupleField.Builder arbitrary() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTupleField.Builder(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTypePath.arbitrary().build());
+    }
+
+    public record Builder(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustType type) {
+        public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTupleField build() {
+            return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTupleField(type);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTupleField.Builder withType(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustType type) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTupleField.Builder(type);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTupleField.Builder withType(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustType.Builder type) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTupleField.Builder(type.build());
+        }
+
+        // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTupleField.Builder body
+        // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTupleField.Builder body
+    }
+
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTupleField body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTupleField body
+}
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 f4103c2..84a1056 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
@@ -37,6 +37,70 @@ public class RustWriterTests {
     // == Items ==
 
     @Test
+    public void emptyEnum() throws IOException {
+        var rust = RustEnum.arbitrary().withName(new RustIdentifier("Shape")).build();
+
+        var string = write(writer -> writer.writeItem(rust));
+
+        assertThat(string, equalTo("""
+            pub enum Shape {
+            }"""));
+    }
+
+    @Test
+    public void enumWithTupleVariants() throws IOException {
+        var rust = RustEnum.arbitrary()
+            .withName(new RustIdentifier("Shape"))
+            .withVariants(List.of(
+                RustEnumVariant.arbitrary()
+                    .withName(new RustIdentifier("Rectangle"))
+                    .withFields(
+                        RustEnumVariantTuple.arbitrary()
+                            .withFields(List.of(
+                                RustTupleField.arbitrary().withType(RustTypePath.of("i32")).build(),
+                                RustTupleField.arbitrary().withType(RustTypePath.of("i32")).build()
+                            ))
+                            .build()
+                    )
+                    .build(),
+                RustEnumVariant.arbitrary()
+                    .withName(new RustIdentifier("Circle"))
+                    .withFields(
+                        RustEnumVariantTuple.arbitrary()
+                            .withFields(List.of(
+                                RustTupleField.arbitrary().withType(RustTypePath.of("u64")).build()
+                            ))
+                            .build()
+                    )
+                    .build()
+            ))
+            .build();
+
+        var string = write(writer -> writer.writeItem(rust));
+
+        assertThat(string, equalTo("""
+            pub enum Shape {
+                Rectangle(i32, i32),
+                Circle(u64),
+            }"""));
+    }
+
+    @Test
+    public void enumWithDocComment() throws IOException {
+        var rust = RustEnum.arbitrary()
+            .withName(new RustIdentifier("Shape"))
+            .withDocComment(new DocComment("A 2D shape."))
+            .build();
+
+        var string = write(writer -> writer.writeItem(rust));
+
+        assertThat(string, equalTo("""
+            /// A 2D shape.
+            pub enum Shape {
+            }"""));
+    }
+
+    @Test
     public void emptyStruct() throws IOException {
         var rust = RustStructStruct.arbitrary().withName(new RustIdentifier("Rectangle")).build();
 
diff --git a/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustEnumMatcher.java b/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustEnumMatcher.java
new file mode 100644
index 0000000..c4668d0
--- /dev/null
+++ b/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustEnumMatcher.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.RustEnumMatcher imports
+// Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumMatcher imports
+
+public class RustEnumMatcher implements org.zwobble.precisely.Matcher<java.lang.Object> {
+    public static org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumMatcher isRustEnum() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumMatcher(java.util.List.of());
+    }
+
+    private final java.util.List<org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnum>> submatchers;
+
+    private RustEnumMatcher(java.util.List<org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnum>> 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.RustEnum.class, this.submatchers);
+    }
+
+    public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumMatcher withName(org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustIdentifier> name) {
+        return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumMatcher(java.util.stream.Stream.concat(this.submatchers.stream(), java.util.stream.Stream.of(org.zwobble.precisely.Matchers.has("name", org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnum::name, name))).toList());
+    }
+
+    public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumMatcher withVariants(org.zwobble.precisely.Matcher<? super java.util.List<org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariant>> variants) {
+        return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumMatcher(java.util.stream.Stream.concat(this.submatchers.stream(), java.util.stream.Stream.of(org.zwobble.precisely.Matchers.has("variants", org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnum::variants, variants))).toList());
+    }
+
+    public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumMatcher withDocComment(org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.ast.DocComment> docComment) {
+        return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumMatcher(java.util.stream.Stream.concat(this.submatchers.stream(), java.util.stream.Stream.of(org.zwobble.precisely.Matchers.has("docComment", org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnum::docComment, docComment))).toList());
+    }
+
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumMatcher body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumMatcher body
+}
diff --git a/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustEnumVariantMatcher.java b/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustEnumVariantMatcher.java
new file mode 100644
index 0000000..2d38854
--- /dev/null
+++ b/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustEnumVariantMatcher.java
@@ -0,0 +1,41 @@
+// Generated by hobgoblin.
+
+package org.zwobble.hobgoblin.compiler.output.lang.rust.ast;
+
+// Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantMatcher imports
+// Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantMatcher imports
+
+public class RustEnumVariantMatcher implements org.zwobble.precisely.Matcher<java.lang.Object> {
+    public static org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantMatcher isRustEnumVariant() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantMatcher(java.util.List.of());
+    }
+
+    private final java.util.List<org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariant>> submatchers;
+
+    private RustEnumVariantMatcher(java.util.List<org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariant>> 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.RustEnumVariant.class, this.submatchers);
+    }
+
+    public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantMatcher withName(org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustIdentifier> name) {
+        return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantMatcher(java.util.stream.Stream.concat(this.submatchers.stream(), java.util.stream.Stream.of(org.zwobble.precisely.Matchers.has("name", org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariant::name, name))).toList());
+    }
+
+    public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantMatcher withFields(org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantFields> fields) {
+        return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantMatcher(java.util.stream.Stream.concat(this.submatchers.stream(), java.util.stream.Stream.of(org.zwobble.precisely.Matchers.has("fields", org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariant::fields, fields))).toList());
+    }
+
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantMatcher body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantMatcher body
+}
diff --git a/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustEnumVariantTupleMatcher.java b/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustEnumVariantTupleMatcher.java
new file mode 100644
index 0000000..fd168be
--- /dev/null
+++ b/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustEnumVariantTupleMatcher.java
@@ -0,0 +1,37 @@
+// Generated by hobgoblin.
+
+package org.zwobble.hobgoblin.compiler.output.lang.rust.ast;
+
+// Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantTupleMatcher imports
+// Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantTupleMatcher imports
+
+public class RustEnumVariantTupleMatcher implements org.zwobble.precisely.Matcher<java.lang.Object> {
+    public static org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantTupleMatcher isRustEnumVariantTuple() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantTupleMatcher(java.util.List.of());
+    }
+
+    private final java.util.List<org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantTuple>> submatchers;
+
+    private RustEnumVariantTupleMatcher(java.util.List<org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantTuple>> 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.RustEnumVariantTuple.class, this.submatchers);
+    }
+
+    public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantTupleMatcher withFields(org.zwobble.precisely.Matcher<? super java.util.List<org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTupleField>> fields) {
+        return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantTupleMatcher(java.util.stream.Stream.concat(this.submatchers.stream(), java.util.stream.Stream.of(org.zwobble.precisely.Matchers.has("fields", org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantTuple::fields, fields))).toList());
+    }
+
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantTupleMatcher body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustEnumVariantTupleMatcher body
+}
diff --git a/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustTupleFieldMatcher.java b/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustTupleFieldMatcher.java
new file mode 100644
index 0000000..bfbf63e
--- /dev/null
+++ b/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustTupleFieldMatcher.java
@@ -0,0 +1,37 @@
+// Generated by hobgoblin.
+
+package org.zwobble.hobgoblin.compiler.output.lang.rust.ast;
+
+// Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTupleFieldMatcher imports
+// Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTupleFieldMatcher imports
+
+public class RustTupleFieldMatcher implements org.zwobble.precisely.Matcher<java.lang.Object> {
+    public static org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTupleFieldMatcher isRustTupleField() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTupleFieldMatcher(java.util.List.of());
+    }
+
+    private final java.util.List<org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTupleField>> submatchers;
+
+    private RustTupleFieldMatcher(java.util.List<org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTupleField>> 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.RustTupleField.class, this.submatchers);
+    }
+
+    public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTupleFieldMatcher withType(org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustType> type) {
+        return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTupleFieldMatcher(java.util.stream.Stream.concat(this.submatchers.stream(), java.util.stream.Stream.of(org.zwobble.precisely.Matchers.has("type", org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTupleField::type, type))).toList());
+    }
+
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTupleFieldMatcher body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustTupleFieldMatcher body
+}