Add dereference expression to Rust AST

4 files changed, 16 insertions, 1 deletions

diff --git a/hobgoblin/src/output/lang/rust/ast.hob b/hobgoblin/src/output/lang/rust/ast.hob
index 7a405d4..e0f1061 100644
--- a/hobgoblin/src/output/lang/rust/ast.hob
+++ b/hobgoblin/src/output/lang/rust/ast.hob
@@ -179,6 +179,7 @@ struct RustPrefixExpression {
 enum RustPrefixOperator {
     variant borrow;
     variant borrowMutable;
+    variant dereference;
 }
 
 struct RustStructExpression {
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 0f026a2..8c449f9 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
@@ -435,6 +435,7 @@ public class RustWriter implements AutoCloseable {
         this.writer.write(switch (prefixExpression.operator()) {
             case BORROW -> "&";
             case BORROW_MUTABLE -> "&mut ";
+            case DEREFERENCE -> "*";
         });
         this.writeExpression(prefixExpression.operand());
     }
diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustPrefixOperator.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustPrefixOperator.java
index f2c0aa8..a8282de 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustPrefixOperator.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/lang/rust/ast/RustPrefixOperator.java
@@ -7,7 +7,8 @@ package org.zwobble.hobgoblin.compiler.output.lang.rust.ast;
 
 public enum RustPrefixOperator {
     BORROW,
-    BORROW_MUTABLE
+    BORROW_MUTABLE,
+    DEREFERENCE
 
     // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustPrefixOperator body
     // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.rust.ast.RustPrefixOperator 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 67f3f30..16c774f 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
@@ -606,6 +606,18 @@ public class RustWriterTests {
         assertThat(string, equalTo("&mut x"));
     }
 
+    @Test
+    public void dereferenceExpression() throws IOException {
+        var rust = RustPrefixExpression.arbitrary()
+            .withOperator(RustPrefixOperator.DEREFERENCE)
+            .withOperand(RustPath.of("x"))
+            .build();
+
+        var string = write(writer -> writer.writeExpression(rust));
+
+        assertThat(string, equalTo("*x"));
+    }
+
     // === Struct expressions ===
 
     @Test