C# backend: write casts

2 files changed, 14 insertions, 1 deletions

diff --git a/src/main/java/org/zwobble/couscous/backends/csharp/CsharpSerializer.java b/src/main/java/org/zwobble/couscous/backends/csharp/CsharpSerializer.java
index 48ca7e0..19c1943 100644
--- a/src/main/java/org/zwobble/couscous/backends/csharp/CsharpSerializer.java
+++ b/src/main/java/org/zwobble/couscous/backends/csharp/CsharpSerializer.java
@@ -270,7 +270,11 @@ public class CsharpSerializer implements NodeVisitor {
 
     @Override
     public void visit(CastNode cast) {
-        throw new UnsupportedOperationException();
+        writer.writeSymbol("(");
+        writeTypeReference(cast.getType());
+        writer.writeSymbol(")");
+        writer.writeSpace();
+        write(cast.getExpression());
     }
 
     @Override
diff --git a/src/test/java/org/zwobble/couscous/tests/backends/csharp/CsharpSerializerTests.java b/src/test/java/org/zwobble/couscous/tests/backends/csharp/CsharpSerializerTests.java
index 781d00a..b7894c0 100644
--- a/src/test/java/org/zwobble/couscous/tests/backends/csharp/CsharpSerializerTests.java
+++ b/src/test/java/org/zwobble/couscous/tests/backends/csharp/CsharpSerializerTests.java
@@ -10,6 +10,7 @@ import org.zwobble.couscous.types.Types;
 import static org.junit.Assert.assertEquals;
 import static org.zwobble.couscous.ast.ArrayNode.array;
 import static org.zwobble.couscous.ast.AssignmentNode.assign;
+import static org.zwobble.couscous.ast.CastNode.cast;
 import static org.zwobble.couscous.ast.ConstructorCallNode.constructorCall;
 import static org.zwobble.couscous.ast.ExpressionStatementNode.expressionStatement;
 import static org.zwobble.couscous.ast.FieldAccessNode.fieldAccess;
@@ -190,6 +191,14 @@ public class CsharpSerializerTests {
     }
 
     @Test
+    public void castIsWrittenWithParenthesisedType() {
+        String output = serialize(cast(
+            reference(var(TestIds.ANY_ID, "x", ScalarType.of("X"))),
+            ScalarType.of("Y")));
+        assertEquals("(Y) x", output);
+    }
+
+    @Test
     public void returnStatementUsesReturnStatement() {
         String output = serialize(returns(literal(true)));
         assertEquals("return true;\n", output);