From 7f3f4236c564dc53d9b580946f6c52b3ad8a0f81 Mon Sep 17 00:00:00 2001
From: Andrey Shchekin <ashmind@gmail.com>
Date: Sun, 25 Jun 2017 16:31:24 +1200
Subject: [PATCH] [closes gh-20] Unrolled operator overloading.

---
 source/#external/ILSpy                        |  2 +-
 .../Decompilation/AstBasedDecompiler.cs       |  1 +
 source/Tests/DecompilationTests.cs            |  2 +
 .../Casts.ExplicitOperatorOnNull.cs2cs        | 39 +++++++++++++++++++
 source/Tests/Tests.csproj                     |  4 ++
 5 files changed, 47 insertions(+), 1 deletion(-)
 create mode 100644 source/Tests/TestCode/Casts.ExplicitOperatorOnNull.cs2cs

diff --git a/source/#external/ILSpy b/source/#external/ILSpy
index 1e338e0..e4edcff 160000
--- a/source/#external/ILSpy
+++ b/source/#external/ILSpy
@@ -1 +1 @@
-Subproject commit 1e338e0fdc676a005522ae6a10adb627a6b94b11
+Subproject commit e4edcffab101aa0660e8fd83a5c7278c03924d6e
diff --git a/source/Server/Decompilation/AstBasedDecompiler.cs b/source/Server/Decompilation/AstBasedDecompiler.cs
index 38af27a..69b0929 100644
--- a/source/Server/Decompilation/AstBasedDecompiler.cs
+++ b/source/Server/Decompilation/AstBasedDecompiler.cs
@@ -25,6 +25,7 @@ namespace SharpLab.Server.Decompilation {
 
             var context = new DecompilerContext(module) {
                 Settings = {
+                    OperatorOverloading = false,
                     AnonymousMethods = false,
                     YieldReturn = false,
                     AsyncAwait = false,
diff --git a/source/Tests/DecompilationTests.cs b/source/Tests/DecompilationTests.cs
index 5d65f5c..ae62882 100644
--- a/source/Tests/DecompilationTests.cs
+++ b/source/Tests/DecompilationTests.cs
@@ -31,6 +31,8 @@ namespace SharpLab.Tests {
         [InlineData("Module.vb2vb")]
         // https://github.com/ashmind/SharpLab/issues/9
         [InlineData("Lambda.CallInArray.cs2cs")]
+        // https://github.com/ashmind/SharpLab/issues/20
+        [InlineData("Casts.ExplicitOperatorOnNull.cs2cs")]
         public async Task SlowUpdate_ReturnsExpectedDecompiledCode(string resourceName) {
             var data = TestData.FromResource(resourceName);
             var driver = await NewTestDriverAsync(data);
diff --git a/source/Tests/TestCode/Casts.ExplicitOperatorOnNull.cs2cs b/source/Tests/TestCode/Casts.ExplicitOperatorOnNull.cs2cs
new file mode 100644
index 0000000..d5ced39
--- /dev/null
+++ b/source/Tests/TestCode/Casts.ExplicitOperatorOnNull.cs2cs
@@ -0,0 +1,39 @@
+public class Foo {
+    public static explicit operator uint? (Foo foo) => 1;
+}
+
+public class Bar {
+    public void Baz() {
+        var x = (uint?)((Foo)null);
+    }
+}
+
+#=>
+
+using System;
+using System.Diagnostics;
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Security;
+using System.Security.Permissions;
+
+[assembly: AssemblyVersion("0.0.0.0")]
+[assembly: Debuggable(DebuggableAttribute.DebuggingModes.IgnoreSymbolStoreSequencePoints)]
+[assembly: CompilationRelaxations(8)]
+[assembly: RuntimeCompatibility(WrapNonExceptionThrows = true)]
+[assembly: SecurityPermission(SecurityAction.RequestMinimum, SkipVerification = true)]
+[module: UnverifiableCode]
+public class Foo
+{
+    public static uint? op_Explicit(Foo foo)
+    {
+        return new uint?(1u);
+    }
+}
+public class Bar
+{
+    public void Baz()
+    {
+        /*uint?*/Foo.op_Explicit(null);
+    }
+}
\ No newline at end of file
diff --git a/source/Tests/Tests.csproj b/source/Tests/Tests.csproj
index 92bd1a4..16e9304 100644
--- a/source/Tests/Tests.csproj
+++ b/source/Tests/Tests.csproj
@@ -26,6 +26,10 @@
     <None Remove="TestCode\Simple.vb2vb" />
   </ItemGroup>
 
+  <ItemGroup>
+    <EmbeddedResource Include="TestCode\Casts.ExplicitOperatorOnNull.cs2cs" />
+  </ItemGroup>
+
   <ItemGroup>
     <EmbeddedResource Include="TestCode\Ast\EmptyType.fs2ast" />
     <EmbeddedResource Include="TestCode\Ast\LiteralTokens.fs2ast" />