From 1d3f9768d5db906b4ba6e3c77345e4af4adddcd2 Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Thu, 31 Mar 2016 14:51:20 +0100
Subject: Add array serialisation to C# backend

---
 .../org/zwobble/couscous/backends/SourceCodeWriter.java     |  7 +++++++
 .../zwobble/couscous/backends/csharp/CsharpSerializer.java  | 10 +++++++++-
 .../tests/backends/csharp/CsharpSerializerTests.java        | 13 +++++++++++++
 3 files changed, 29 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/main/java/org/zwobble/couscous/backends/SourceCodeWriter.java b/src/main/java/org/zwobble/couscous/backends/SourceCodeWriter.java
index 3908f72..393cdc2 100644
--- a/src/main/java/org/zwobble/couscous/backends/SourceCodeWriter.java
+++ b/src/main/java/org/zwobble/couscous/backends/SourceCodeWriter.java
@@ -93,6 +93,13 @@ public class SourceCodeWriter {
         action.run(this);
     }
 
+    public <T> void writeCommaSeparated(Iterable<T> values, Consumer<T> writeValue) {
+        writeWithSeparator(values, writeValue, () -> {
+            writeSymbol(",");
+            writeSpace();
+        });
+    }
+
     public <T> void writeWithSeparator(Iterable<T> values, Consumer<T> writeValue, Action separator) {
         Iterator<T> iterator = values.iterator();
         if (iterator.hasNext()) {
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 e7ac3d7..499121c 100644
--- a/src/main/java/org/zwobble/couscous/backends/csharp/CsharpSerializer.java
+++ b/src/main/java/org/zwobble/couscous/backends/csharp/CsharpSerializer.java
@@ -88,7 +88,15 @@ public class CsharpSerializer implements NodeVisitor {
 
     @Override
     public void visit(ArrayNode array) {
-        throw new UnsupportedOperationException();
+        writer.writeKeyword("new");
+        writer.writeSpace();
+        writeTypeReference(array.getElementType());
+        writer.writeSymbol("[");
+        writer.writeSymbol("]");
+        writer.writeSpace();
+        writer.writeSymbol("{");
+        writer.writeCommaSeparated(array.getElements(), this::write);
+        writer.writeSymbol("}");
     }
 
     @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 5c1044d..51cbeae 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
@@ -8,6 +8,7 @@ import org.zwobble.couscous.tests.TestIds;
 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.ConstructorCallNode.constructorCall;
 import static org.zwobble.couscous.ast.ExpressionStatementNode.expressionStatement;
@@ -67,6 +68,18 @@ public class CsharpSerializerTests {
         assertEquals("this", output);
     }
 
+    @Test
+    public void emptyArraySpecifiesTypeOfArray() {
+        String output = serialize(array(ScalarType.of("X"), list()));
+        assertEquals("new X[] {}", output);
+    }
+
+    @Test
+    public void arrayElementsAreSeparatedByComma() {
+        String output = serialize(array(ScalarType.of("X"), list(literal(1), literal(2))));
+        assertEquals("new X[] {1, 2}", output);
+    }
+
     @Test
     public void assignmentSeparatesTargetAndValueWithEqualsSign() {
         String output = serialize(assign(
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