From 8d7bc34b73f2c62d1b9fd50c12b0e0ba6ab0c37a Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Sat, 16 Jan 2016 16:28:59 +0000
Subject: Add support for reference equality on C# backend

---
 .../zwobble/couscous/backends/csharp/CsharpBackend.java    |  3 ++-
 .../zwobble/couscous/backends/csharp/CsharpSerializer.java | 14 ++++++++------
 src/main/resources/csharp/runtime/_couscous.cs             |  7 +++++++
 .../tests/backends/csharp/CsharpCompilerEvalTests.java     |  5 -----
 4 files changed, 17 insertions(+), 12 deletions(-)
 create mode 100644 src/main/resources/csharp/runtime/_couscous.cs

(limited to 'src')

diff --git a/src/main/java/org/zwobble/couscous/backends/csharp/CsharpBackend.java b/src/main/java/org/zwobble/couscous/backends/csharp/CsharpBackend.java
index b92e683..6c2555c 100644
--- a/src/main/java/org/zwobble/couscous/backends/csharp/CsharpBackend.java
+++ b/src/main/java/org/zwobble/couscous/backends/csharp/CsharpBackend.java
@@ -16,7 +16,8 @@ import static com.google.common.collect.Iterables.transform;
 
 public class CsharpBackend implements Backend {
     private static final List<String> RUNTIME_FILES = ImmutableList.of(
-        "java/lang/String.cs");
+        "java/lang/String.cs",
+        "_couscous.cs");
 
     private final Path directoryPath;
     private final String namespace;
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 ae898f5..6dc7c34 100644
--- a/src/main/java/org/zwobble/couscous/backends/csharp/CsharpSerializer.java
+++ b/src/main/java/org/zwobble/couscous/backends/csharp/CsharpSerializer.java
@@ -10,12 +10,14 @@ import java.util.List;
 import java.util.Map;
 
 public class CsharpSerializer implements NodeVisitor {
-    private final static Map<TypeName, String> PRIMITIVES = ImmutableMap.of(
-        IntegerValue.REF, "int",
-        StringValue.REF, "string",
-        BooleanValue.REF, "bool",
-        ObjectValues.CLASS, "System.Type",
-        UnitValue.REF, "void");
+    private final static Map<TypeName, String> PRIMITIVES = ImmutableMap.<TypeName, String>builder()
+        .put(IntegerValue.REF, "int")
+        .put(StringValue.REF, "string")
+        .put(BooleanValue.REF, "bool")
+        .put(ObjectValues.OBJECT, "object")
+        .put(ObjectValues.CLASS, "System.Type")
+        .put(UnitValue.REF, "void")
+        .build();
 
     public static String serialize(Node node, String namespace) {
         SourceCodeWriter writer = new SourceCodeWriter(
diff --git a/src/main/resources/csharp/runtime/_couscous.cs b/src/main/resources/csharp/runtime/_couscous.cs
new file mode 100644
index 0000000..752b021
--- /dev/null
+++ b/src/main/resources/csharp/runtime/_couscous.cs
@@ -0,0 +1,7 @@
+namespace Couscous {
+    internal class _couscous {
+        internal static bool same(object first, object second) {
+            return object.ReferenceEquals(first, second);
+        }
+    }
+}
diff --git a/src/test/java/org/zwobble/couscous/tests/backends/csharp/CsharpCompilerEvalTests.java b/src/test/java/org/zwobble/couscous/tests/backends/csharp/CsharpCompilerEvalTests.java
index 79c4a6d..56897e1 100644
--- a/src/test/java/org/zwobble/couscous/tests/backends/csharp/CsharpCompilerEvalTests.java
+++ b/src/test/java/org/zwobble/couscous/tests/backends/csharp/CsharpCompilerEvalTests.java
@@ -10,11 +10,6 @@ import org.zwobble.couscous.values.PrimitiveValue;
 import java.util.List;
 
 public class CsharpCompilerEvalTests extends BackendEvalTests {
-    @Test
-    @Ignore
-    public void equalityOnReferenceTypesChecksForIdentity() {
-    }
-
     @Test
     @Ignore
     public void canEvaluateOperationsOnBooleans() {
-- 
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