Add reference types to Rust AST

8 files changed, 194 insertions, 2 deletions

diff --git a/hobgoblin/src/output/lang/rust/ast.hob b/hobgoblin/src/output/lang/rust/ast.hob
index 884f4d4..22ee689 100644
--- a/hobgoblin/src/output/lang/rust/ast.hob
+++ b/hobgoblin/src/output/lang/rust/ast.hob
@@ -171,13 +171,23 @@ struct RustStructExprField {
 
 sum RustType {
     variant RustImplTraitType;
+    variant RustMutableReferenceType;
     variant RustPath;
+    variant RustSharedReferenceType;
 }
 
 struct RustImplTraitType {
     field trait: RustPath;
 }
 
+struct RustMutableReferenceType {
+    field referencedType: RustType;
+}
+
+struct RustSharedReferenceType {
+    field referencedType: RustType;
+}
+
 // == Paths ==
 
 struct RustPath {
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 c0550fd..3c1bfba 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
@@ -324,7 +324,7 @@ public class RustWriter implements AutoCloseable {
             case RustPath path -> {
                 this.writePath(path);
             }
-            
+
             case RustPrefixExpression prefixExpression -> {
                 this.writePrefixExpression(prefixExpression);
             }
@@ -415,9 +415,17 @@ public class RustWriter implements AutoCloseable {
                 writeImplTraitType(implTraitType);
             }
 
+            case RustMutableReferenceType mutableReferenceType -> {
+                writeMutableReferenceType(mutableReferenceType);
+            }
+
             case RustPath path -> {
                 writePath(path);
             }
+
+            case RustSharedReferenceType sharedReferenceType -> {
+                writeSharedReferenceType(sharedReferenceType);
+            }
         }
     }
 
@@ -426,6 +434,16 @@ public class RustWriter implements AutoCloseable {
         this.writePath(implTraitType.trait());
     }
 
+    private void writeMutableReferenceType(RustMutableReferenceType mutableReferenceType) throws IOException {
+        this.writer.write("&mut ");
+        this.writeType(mutableReferenceType.referencedType());
+    }
+
+    private void writeSharedReferenceType(RustSharedReferenceType sharedReferenceType) throws IOException {
+        this.writer.write("&");
+        this.writeType(sharedReferenceType.referencedType());
+    }
+
     // == Paths ==
 
     private void writePath(RustPath path) throws IOException {
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustMutableReferenceType.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustMutableReferenceType.java
new file mode 100644
index 0000000..37c8ee4
--- /dev/null
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustMutableReferenceType.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.RustMutableReferenceType imports
+// Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMutableReferenceType imports
+
+public record RustMutableReferenceType(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustType referencedType) implements org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustType {
+    public static org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMutableReferenceType.Builder arbitrary() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMutableReferenceType.Builder(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustImplTraitType.arbitrary().build());
+    }
+
+    public record Builder(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustType referencedType) implements org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustType.Builder {
+        public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMutableReferenceType build() {
+            return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMutableReferenceType(referencedType);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMutableReferenceType.Builder withReferencedType(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustType referencedType) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMutableReferenceType.Builder(referencedType);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMutableReferenceType.Builder withReferencedType(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustType.Builder referencedType) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMutableReferenceType.Builder(referencedType.build());
+        }
+
+        // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMutableReferenceType.Builder body
+        // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMutableReferenceType.Builder body
+    }
+
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMutableReferenceType body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMutableReferenceType body
+}
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustSharedReferenceType.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustSharedReferenceType.java
new file mode 100644
index 0000000..a3131b1
--- /dev/null
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustSharedReferenceType.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.RustSharedReferenceType imports
+// Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustSharedReferenceType imports
+
+public record RustSharedReferenceType(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustType referencedType) implements org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustType {
+    public static org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustSharedReferenceType.Builder arbitrary() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustSharedReferenceType.Builder(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustImplTraitType.arbitrary().build());
+    }
+
+    public record Builder(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustType referencedType) implements org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustType.Builder {
+        public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustSharedReferenceType build() {
+            return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustSharedReferenceType(referencedType);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustSharedReferenceType.Builder withReferencedType(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustType referencedType) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustSharedReferenceType.Builder(referencedType);
+        }
+
+        public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustSharedReferenceType.Builder withReferencedType(org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustType.Builder referencedType) {
+            return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustSharedReferenceType.Builder(referencedType.build());
+        }
+
+        // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustSharedReferenceType.Builder body
+        // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustSharedReferenceType.Builder body
+    }
+
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustSharedReferenceType body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustSharedReferenceType body
+}
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustType.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustType.java
index 41f1777..9c797ac 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustType.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustType.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.RustType imports
 // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustType imports
 
-public sealed interface RustType permits org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustImplTraitType, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustPath {
+public sealed interface RustType permits org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustImplTraitType, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMutableReferenceType, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustPath, org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustSharedReferenceType {
     public interface Builder {
         public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustType build();
 
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 7f85b8a..6900f83 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
@@ -558,6 +558,28 @@ public class RustWriterTests {
         assertThat(string, equalTo("impl std::io::Read"));
     }
 
+    @Test
+    public void mutableReferenceType() throws IOException {
+        var rust = RustMutableReferenceType.arbitrary()
+            .withReferencedType(RustPath.of("i32"))
+            .build();
+
+        var string = write(writer -> writer.writeType(rust));
+
+        assertThat(string, equalTo("&mut i32"));
+    }
+
+    @Test
+    public void sharedReferenceType() throws IOException {
+        var rust = RustSharedReferenceType.arbitrary()
+            .withReferencedType(RustPath.of("i32"))
+            .build();
+
+        var string = write(writer -> writer.writeType(rust));
+
+        assertThat(string, equalTo("&i32"));
+    }
+
     // == Paths ==
 
     @Test
diff --git a/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustMutableReferenceTypeMatcher.java b/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustMutableReferenceTypeMatcher.java
new file mode 100644
index 0000000..875dac8
--- /dev/null
+++ b/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustMutableReferenceTypeMatcher.java
@@ -0,0 +1,39 @@
+// Generated by hobgoblin.
+
+package org.zwobble.hobgoblin.compiler.output.lang.rust.ast;
+
+// Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMutableReferenceTypeMatcher imports
+// Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMutableReferenceTypeMatcher imports
+
+public class RustMutableReferenceTypeMatcher implements org.zwobble.precisely.Matcher<java.lang.Object> {
+    public static org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMutableReferenceTypeMatcher isRustMutableReferenceType() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMutableReferenceTypeMatcher(java.util.List.of());
+    }
+
+    private final java.util.List<org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMutableReferenceType>> submatchers;
+
+    private RustMutableReferenceTypeMatcher(java.util.List<org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMutableReferenceType>> 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.RustMutableReferenceType.class, this.submatchers);
+    }
+
+    public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMutableReferenceTypeMatcher withReferencedType(org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustType> referencedType) {
+        var submatchers = new java.util.ArrayList<org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMutableReferenceType>>(this.submatchers);
+        submatchers.add(org.zwobble.precisely.Matchers.has("referencedType", org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMutableReferenceType::referencedType, referencedType));
+        return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMutableReferenceTypeMatcher(submatchers);
+    }
+
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMutableReferenceTypeMatcher body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustMutableReferenceTypeMatcher body
+}
diff --git a/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustSharedReferenceTypeMatcher.java b/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustSharedReferenceTypeMatcher.java
new file mode 100644
index 0000000..1776707
--- /dev/null
+++ b/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustSharedReferenceTypeMatcher.java
@@ -0,0 +1,39 @@
+// Generated by hobgoblin.
+
+package org.zwobble.hobgoblin.compiler.output.lang.rust.ast;
+
+// Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustSharedReferenceTypeMatcher imports
+// Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustSharedReferenceTypeMatcher imports
+
+public class RustSharedReferenceTypeMatcher implements org.zwobble.precisely.Matcher<java.lang.Object> {
+    public static org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustSharedReferenceTypeMatcher isRustSharedReferenceType() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustSharedReferenceTypeMatcher(java.util.List.of());
+    }
+
+    private final java.util.List<org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustSharedReferenceType>> submatchers;
+
+    private RustSharedReferenceTypeMatcher(java.util.List<org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustSharedReferenceType>> 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.RustSharedReferenceType.class, this.submatchers);
+    }
+
+    public org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustSharedReferenceTypeMatcher withReferencedType(org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustType> referencedType) {
+        var submatchers = new java.util.ArrayList<org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustSharedReferenceType>>(this.submatchers);
+        submatchers.add(org.zwobble.precisely.Matchers.has("referencedType", org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustSharedReferenceType::referencedType, referencedType));
+        return new org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustSharedReferenceTypeMatcher(submatchers);
+    }
+
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustSharedReferenceTypeMatcher body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustSharedReferenceTypeMatcher body
+}