public void SimpleProtocolProGetSetIndexer ()
		{
			var swiftCode = @"
public protocol Simplest5 {
	associatedtype Item
	subscript (index: Int) -> Item {
		get set
	}
}
public func doSetIt<T:Simplest5> (a: inout T, i: Int, v: T.Item) {
	a[i] = v
}
";
			var altClass = new CSClass (CSVisibility.Public, "Simple5Impl");
			altClass.Inheritance.Add (new CSIdentifier ("ISimplest5<SwiftString>"));

			var fieldName = new CSIdentifier ("v");
			altClass.Fields.Add (CSFieldDeclaration.FieldLine (new CSSimpleType ("SwiftString"), fieldName));
			var getBlock = CSCodeBlock.Create (CSReturn.ReturnLine (fieldName));
			var setBlock = CSCodeBlock.Create (CSAssignment.Assign (fieldName, new CSIdentifier ("value")));

			var parameters = new CSParameterList (new CSParameter (new CSSimpleType ("nint"), new CSIdentifier ("index")));
			var thingIndex = new CSProperty (new CSSimpleType ("SwiftString"), CSMethodKind.None,
				CSVisibility.Public, getBlock, CSVisibility.Public, setBlock, parameters);
			altClass.Properties.Add (thingIndex);

			var ctor = new CSMethod (CSVisibility.Public, CSMethodKind.None, null, altClass.Name, new CSParameterList (), CSCodeBlock.Create ());
			altClass.Methods.Add (ctor);
			var instID = new CSIdentifier ("inst");
			var instDecl = CSVariableDeclaration.VarLine (instID, new CSFunctionCall ("Simple5Impl", true));
			var callSetter = CSFunctionCall.FunctionCallLine ("TopLevelEntities.DoSetIt", false, instID, CSConstant.Val (3), new CSFunctionCall ("SwiftString.FromString", false, CSConstant.Val ("Got here!")));
			var printer = CSFunctionCall.ConsoleWriteLine (new CSIdentifier ($"{instID.Name}[3]"));
			var callingCode = CSCodeBlock.Create (instDecl, callSetter, printer);
			TestRunning.TestAndExecute (swiftCode, callingCode, "Got here!\n", otherClass: altClass, platform: PlatformName.macOS);
		}
 void DeclInitExposure(CSVisibility vis)
 {
     using (Stream stm = Utils.BasicClass("None", "AClass", null, cl => {
         cl.Fields.Add(CSFieldDeclaration.FieldLine(CSSimpleType.Byte, "b", CSConstant.Val((byte)0), CSVisibility.Public));
         return(cl);
     })) {
         Utils.CompileAStream(stm);
     }
 }
        void DeclType(CSType type)
        {
            if (type == CSSimpleType.Void)
            {
                return;
            }

            using (Stream stm = Utils.BasicClass("None", "AClass", null, cl => {
                cl.Fields.Add(CSFieldDeclaration.FieldLine(type, "b", null, CSVisibility.Public));
                return(cl);
            })) {
                Utils.CompileAStream(stm);
            }
        }
        static void AddMacSpecificInitializationCode(CSClass cl)
        {
            var parms = new CSParameterList {
                new CSParameter(CSSimpleType.String, "path"),
                new CSParameter(CSSimpleType.Int, "mode")
            };

            var dlopen = CSMethod.PrivatePInvoke(CSSimpleType.IntPtr, "dlopen", "/usr/lib/libSystem.dylib", "dlopen", parms);

            cl.Methods.Add(dlopen);

            var appID = new CSIdentifier("Application");

            cl.Fields.Add(CSFieldDeclaration.FieldLine(new CSSimpleType(typeof(Type)), appID, null, CSVisibility.None, true));

            // NSApplication.Init ();
            var body = CSCodeBlock.Create(CSFunctionCall.FunctionCallLine("AppKit.NSApplication.Init", false));

            var staticCtor = new CSMethod(CSVisibility.None, CSMethodKind.Static, null, cl.Name, new CSParameterList(), body);

            cl.Methods.Add(staticCtor);
        }
        public List <ICodeElement> MarshalFromLambdaReceiverToCSFunc(CSType thisType, string csProxyName, CSParameterList delegateParams,
                                                                     FunctionDeclaration funcDecl, CSType methodType, CSParameterList methodParams, string methodName, bool isObjC)
        {
            bool thisIsInterface = csProxyName != null;
            bool isIndexer       = funcDecl.IsSubscript;
            bool needsReturn     = methodType != null && methodType != CSSimpleType.Void;
            bool isSetter        = funcDecl.IsSubscriptSetter;
            bool returnIsGeneric = funcDecl.IsTypeSpecGeneric(funcDecl.ReturnTypeSpec);

            var entity = !returnIsGeneric?typeMapper.GetEntityForTypeSpec(funcDecl.ReturnTypeSpec) : null;

            var returnEntity = entity;
            var entityType   = !returnIsGeneric?typeMapper.GetEntityTypeForTypeSpec(funcDecl.ReturnTypeSpec) : EntityType.None;

            bool returnIsStruct   = needsReturn && entity != null && entity.IsStructOrEnum;
            bool returnIsClass    = needsReturn && entity != null && entity.EntityType == EntityType.Class;
            bool returnIsProtocol = needsReturn && ((entity != null && entity.EntityType == EntityType.Protocol) || entityType == EntityType.ProtocolList);
            bool returnIsTuple    = needsReturn && entityType == EntityType.Tuple;
            bool returnIsClosure  = needsReturn && entityType == EntityType.Closure;

            var callParams                    = new List <CSBaseExpression> ();
            var preMarshalCode                = new List <CSLine> ();
            var postMarshalCode               = new List <CSLine> ();
            CSBaseExpression valueExpr        = null;
            bool             marshalingThrows = false;


            if (isSetter)
            {
                var valueID = delegateParams [1].Name;
                valueExpr = valueID;
                var  swiftNewValue     = funcDecl.ParameterLists [1] [0];
                bool newValueIsGeneric = funcDecl.IsTypeSpecGeneric(funcDecl.PropertyType);
                entity = !newValueIsGeneric?typeMapper.GetEntityForTypeSpec(swiftNewValue.TypeSpec) : null;

                entityType = !newValueIsGeneric?typeMapper.GetEntityTypeForTypeSpec(swiftNewValue.TypeSpec) : EntityType.None;

                var isUnusualNewValue = IsUnusualParameter(entity, delegateParams [1]);

                if (entityType == EntityType.Class || entity.IsObjCProtocol)
                {
                    var csParmType = new CSSimpleType(entity.SharpNamespace + "." + entity.SharpTypeName);
                    if (csParmType == null)
                    {
                        throw ErrorHelper.CreateError(ReflectorError.kTypeMapBase + 26, "Inconceivable! The class type for a subscript was NOT a CSSimpleType!");
                    }
                    use.AddIfNotPresent(typeof(SwiftObjectRegistry));

                    var fullClassName = entity.Type.ToFullyQualifiedName(true);
                    valueExpr = NewClassCompiler.SafeMarshalClassFromIntPtr(valueID, csParmType, use, fullClassName, typeMapper, entity.IsObjCProtocol);
                }
                else if (entityType == EntityType.Protocol)
                {
                    var csParmType = new CSSimpleType(entity.SharpNamespace + "." + entity.SharpTypeName);
                    if (csParmType == null)
                    {
                        throw ErrorHelper.CreateError(ReflectorError.kTypeMapBase + 27, "Inconceivable! The protocol type for a subscript was NOT a CSSimpleType!");
                    }
                    use.AddIfNotPresent(typeof(StructMarshal));
                    use.AddIfNotPresent(typeof(SwiftObjectRegistry));
                    valueExpr = new CSFunctionCall($"SwiftObjectRegistry.Registry.InterfaceForExistentialContainer<{csParmType.ToString ()}>", false, valueID);
                }
                else if ((entityType == EntityType.Struct || entityType == EntityType.Enum) && !isUnusualNewValue)
                {
                    var csParmType = new CSSimpleType(entity.SharpNamespace + "." + entity.SharpTypeName);
                    if (csParmType == null)
                    {
                        throw ErrorHelper.CreateError(ReflectorError.kTypeMapBase + 28, $"Inconceivable! The {entityType} type for a subscript was NOT a CSSimpleType!");
                    }
                    use.AddIfNotPresent(typeof(StructMarshal));
                    string valMarshalName = MarshalEngine.Uniqueify("val", identifiersUsed);
                    var    valMarshalId   = new CSIdentifier(valMarshalName);

                    CSLine valDecl = CSVariableDeclaration.VarLine(csParmType, valMarshalId,
                                                                   new CSCastExpression(csParmType, new CSFunctionCall("StructMarshal.Marshaler.ToNet", false, valueID,
                                                                                                                       csParmType.Typeof())));
                    preMarshalCode.Add(valDecl);
                    valueExpr = valMarshalId;
                }
                else if (entityType == EntityType.Tuple)
                {
                    var csParmType = new CSSimpleType(entity.SharpNamespace + "." + entity.SharpTypeName);
                    if (csParmType == null)
                    {
                        throw ErrorHelper.CreateError(ReflectorError.kTypeMapBase + 29, "Inconceivable! The tuple type for a subscript was NOT a CSSimpleType!");
                    }
                    use.AddIfNotPresent(typeof(StructMarshal));
                    string valMarshalName = MarshalEngine.Uniqueify("val", identifiersUsed);
                    var    valMarshalId   = new CSIdentifier(valMarshalName);

                    var valDecl = CSVariableDeclaration.VarLine(csParmType, valMarshalId,
                                                                new CSCastExpression(csParmType, new CSFunctionCall("StructMarshal.Marshaler.ToNet", false, valueID,
                                                                                                                    csParmType.Typeof())));
                    preMarshalCode.Add(valDecl);
                    valueExpr = valMarshalId;
                }
                else if (newValueIsGeneric)
                {
                    var depthIndex = funcDecl.GetGenericDepthAndIndex(swiftNewValue.TypeSpec);
                    var genRef     = new CSGenericReferenceType(depthIndex.Item1, depthIndex.Item2);
                    if (genRef == null)
                    {
                        throw ErrorHelper.CreateError(ReflectorError.kTypeMapBase + 30, "Inconceivable! The generic type for a parameter in a method was NOT a CSGenericReferenceType!");
                    }
                    use.AddIfNotPresent(typeof(StructMarshal));
                    string valMarshalName = MarshalEngine.Uniqueify("valTemp", identifiersUsed);
                    var    valMarshalId   = new CSIdentifier(valMarshalName);

                    var valDecl = CSVariableDeclaration.VarLine(genRef, valMarshalId,
                                                                new CSCastExpression(genRef, new CSFunctionCall("StructMarshal.Marshaler.ToNet", false,
                                                                                                                valueID, genRef.Typeof())));
                    preMarshalCode.Add(valDecl);
                    valueExpr = valMarshalId;
                }
            }

            int j = 0;
            int k = isSetter ? 1 : 0;

            for (int i = (funcDecl.HasThrows || returnIsStruct || returnIsProtocol || isSetter || returnIsGeneric) ? 2 : 1; i < delegateParams.Count; i++, j++, k++)
            {
                var  swiftParm     = funcDecl.ParameterLists [1] [k];
                bool parmIsGeneric = funcDecl.IsTypeSpecGeneric(swiftParm);
                entity = !parmIsGeneric?typeMapper.GetEntityForTypeSpec(swiftParm.TypeSpec) : null;

                entityType = !parmIsGeneric?typeMapper.GetEntityTypeForTypeSpec(swiftParm.TypeSpec) : EntityType.None;

                var isUnusualParameter = IsUnusualParameter(entity, delegateParams [i]);
                var csParm             = methodParams [j];

                if (entityType == EntityType.Class || (entity != null && entity.IsObjCProtocol))
                {
                    var csParmType = csParm.CSType as CSSimpleType;
                    if (csParmType == null)
                    {
                        throw ErrorHelper.CreateError(ReflectorError.kTypeMapBase + 31, "Inconceivable! The class type for a method was NOT a CSSimpleType!");
                    }
                    use.AddIfNotPresent(typeof(SwiftObjectRegistry));

                    var fullClassName = entity.Type.ToFullyQualifiedName(true);
                    var retrievecall  = NewClassCompiler.SafeMarshalClassFromIntPtr(delegateParams [0].Name, csParmType, use, fullClassName, typeMapper, entity.IsObjCProtocol);
                    if (csParm.ParameterKind == CSParameterKind.Out || csParm.ParameterKind == CSParameterKind.Ref)
                    {
                        string id = MarshalEngine.Uniqueify(delegateParams [i].Name.Name, identifiersUsed);
                        identifiersUsed.Add(id);
                        preMarshalCode.Add(CSFieldDeclaration.FieldLine(csParmType, id, retrievecall));
                        callParams.Add(new CSIdentifier(String.Format("{0} {1}",
                                                                      csParm.ParameterKind == CSParameterKind.Out ? "out" : "ref", id)));
                        postMarshalCode.Add(CSAssignment.Assign(delegateParams [i].Name,
                                                                NewClassCompiler.SafeBackingFieldAccessor(new CSIdentifier(id), use, entity.Type.ToFullyQualifiedName(true), typeMapper)));
                    }
                    else
                    {
                        callParams.Add(retrievecall);
                    }
                }
                else if (entityType == EntityType.Protocol)
                {
                    var thePtr     = new CSIdentifier(MarshalEngine.Uniqueify("p", identifiersUsed));
                    var csParmType = csParm.CSType as CSSimpleType;
                    if (csParmType == null)
                    {
                        throw ErrorHelper.CreateError(ReflectorError.kTypeMapBase + 32, "Inconceivable! The protocol type for a method was NOT a CSSimpleType!");
                    }
                    use.AddIfNotPresent(typeof(SwiftObjectRegistry));
                    string csParmProxyType = NewClassCompiler.CSProxyNameForProtocol(entity.Type.ToFullyQualifiedName(true), typeMapper);
                    if (csParmProxyType == null)
                    {
                        throw ErrorHelper.CreateError(ReflectorError.kTypeMapBase + 33, $"Unable to find C# interface type for protocol {entity.Type.ToFullyQualifiedName ()}");
                    }

                    var retrievecall = new CSFunctionCall($"SwiftObjectRegistry.Registry.InterfaceForExistentialContainer<{csParmType.Name}>", false, delegateParams [i].Name);
                    if (csParm.ParameterKind == CSParameterKind.Out || csParm.ParameterKind == CSParameterKind.Ref)
                    {
                        CSIdentifier id = new CSIdentifier(MarshalEngine.Uniqueify(delegateParams [i].Name.Name, identifiersUsed));
                        identifiersUsed.Add(id.Name);
                        preMarshalCode.Add(CSFieldDeclaration.FieldLine(csParmType, id.Name, retrievecall));
                        callParams.Add(new CSIdentifier(String.Format("{0} {1}",
                                                                      csParm.ParameterKind == CSParameterKind.Out ? "out" : "ref", id)));
                        postMarshalCode.Add(CSAssignment.Assign(delegateParams [i].Name,
                                                                new CSFunctionCall("SwiftExistentialContainer1", true,
                                                                                   new CSFunctionCall("SwiftObjectRegistry.Registry.ExistentialContainerForProtocol", false, id, csParmType.Typeof()))));
                    }
                    else
                    {
                        callParams.Add(retrievecall);
                    }
                }
                else if ((entityType == EntityType.Struct || entityType == EntityType.Enum) && !isUnusualParameter)
                {
                    var csParmType = csParm.CSType as CSSimpleType;
                    if (csParmType == null)
                    {
                        throw ErrorHelper.CreateError(ReflectorError.kTypeMapBase + 34, $"Inconceivable! The {entityType} type for a method was NOT a CSSimpleType!");
                    }
                    use.AddIfNotPresent(typeof(StructMarshal));
                    use.AddIfNotPresent(typeof(StructMarshal));
                    string valMarshalName = MarshalEngine.Uniqueify(delegateParams [i].Name + "Temp", identifiersUsed);
                    var    valMarshalId   = new CSIdentifier(valMarshalName);

                    var valDecl = CSVariableDeclaration.VarLine(csParmType, valMarshalId,
                                                                new CSCastExpression(csParmType, new CSFunctionCall("StructMarshal.Marshaler.ToNet", false, delegateParams [i].Name,
                                                                                                                    csParmType.Typeof())));
                    preMarshalCode.Add(valDecl);
                    callParams.Add(valMarshalId);
                }
                else if (entityType == EntityType.Tuple)
                {
                    var csParmType = csParm.CSType as CSSimpleType;
                    if (csParmType == null)
                    {
                        throw ErrorHelper.CreateError(ReflectorError.kTypeMapBase + 35, "Inconceivable! The tuple type for a parameter in a method was NOT a CSSimpleType!");
                    }
                    use.AddIfNotPresent(typeof(StructMarshal));
                    string valMarshalName = MarshalEngine.Uniqueify(delegateParams [i].Name + "Temp", identifiersUsed);
                    var    valMarshalId   = new CSIdentifier(valMarshalName);

                    var valDecl = CSVariableDeclaration.VarLine(csParmType, valMarshalId,
                                                                new CSCastExpression(csParmType, new CSFunctionCall("StructMarshal.Marshaler.ToNet", false, delegateParams [i].Name,
                                                                                                                    csParmType.Typeof())));
                    preMarshalCode.Add(valDecl);
                    callParams.Add(valMarshalId);
                }
                else if (entityType == EntityType.Closure)
                {
                    // parm is a SwiftClosureRepresentation
                    // (FuncType)StructMarshal.Marshaler.MakeDelegateFromBlindClosure (arg, argTypes, returnType);
                    var argTypesId = new CSIdentifier(MarshalEngine.Uniqueify("argTypes" + delegateParams [i], identifiersUsed));
                    identifiersUsed.Add(argTypesId.Name);
                    var parmType = csParm.CSType as CSSimpleType;
                    if (parmType == null)
                    {
                        throw ErrorHelper.CreateError(ReflectorError.kTypeMapBase + 44, "Inconceivable! The type for a closure should be a CSSimpleType");
                    }
                    var hasReturn      = parmType.GenericTypeName == "Func";
                    var returnType     = hasReturn ? (CSBaseExpression)parmType.GenericTypes [parmType.GenericTypes.Length - 1].Typeof() : CSConstant.Null;
                    var argTypesLength = hasReturn ? parmType.GenericTypes.Length - 1 : parmType.GenericTypes.Length;
                    var argTypes       = new CSBaseExpression [argTypesLength];
                    for (int idx = 0; idx < argTypesLength; idx++)
                    {
                        argTypes [idx] = parmType.GenericTypes [idx].Typeof();
                    }
                    var typeArr = new CSArray1DInitialized(CSSimpleType.Type, argTypes);

                    var closureExpr = new CSFunctionCall("StructMarshal.Marshaler.MakeDelegateFromBlindClosure", false, delegateParams [i].Name,
                                                         typeArr, returnType);
                    var castTo = new CSCastExpression(csParm.CSType, closureExpr);
                    callParams.Add(castTo);
                }
                else if (entityType == EntityType.ProtocolList)
                {
                    preMarshalCode.Add(CSFunctionCall.FunctionCallLine("throw new NotImplementedException", false, CSConstant.Val($"Argument {csParm.Name} is a protocol list type and can't be marshaled from a virtual method.")));
                    callParams.Add(CSConstant.Null);
                    marshalingThrows = true;
                }
                else if (parmIsGeneric)
                {
                    // parm is an IntPtr to some T
                    // to get T, we ask funcDecl for the depthIndex of T
                    // T someVal = (T)StructMarshal.Marshaler.ToNet(parm, typeof(T));
                    // someVal gets passed in
                    var genRef = csParm.CSType as CSGenericReferenceType;
                    if (genRef == null)
                    {
                        throw ErrorHelper.CreateError(ReflectorError.kTypeMapBase + 36, "Inconceivable! The generic type for a parameter in a method was NOT a CSGenericReferenceType!");
                    }
                    use.AddIfNotPresent(typeof(StructMarshal));
                    string valMarshalName = MarshalEngine.Uniqueify(delegateParams [i].Name + "Temp", identifiersUsed);
                    var    valMarshalId   = new CSIdentifier(valMarshalName);

                    var valDecl = CSVariableDeclaration.VarLine(genRef, valMarshalId,
                                                                new CSCastExpression(genRef, new CSFunctionCall("StructMarshal.Marshaler.ToNet", false,
                                                                                                                delegateParams [i].Name,
                                                                                                                genRef.Typeof())));
                    preMarshalCode.Add(valDecl);
                    callParams.Add(valMarshalId);
                }
                else
                {
                    if (csParm.ParameterKind == CSParameterKind.Out || csParm.ParameterKind == CSParameterKind.Ref)
                    {
                        callParams.Add(new CSIdentifier(String.Format("{0} {1}",
                                                                      csParm.ParameterKind == CSParameterKind.Out ? "out" : "ref", delegateParams [i].Name.Name)));
                    }
                    else
                    {
                        callParams.Add(delegateParams [i].Name);
                    }
                }
            }

            var body = new CSCodeBlock();

            if (isObjC)
            {
                use.AddIfNotPresent("ObjCRuntime");
            }
            else
            {
                use.AddIfNotPresent(typeof(SwiftObjectRegistry));
            }


            CSBaseExpression invoker = null;

            if (isIndexer)
            {
                if (thisIsInterface)
                {
                    invoker = new CSIndexExpression(
                        $"SwiftObjectRegistry.Registry.InterfaceForExistentialContainer<{thisType.ToString ()}> (self)",
                        false, callParams.ToArray());
                }
                else
                {
                    var registryCall = isObjC ?
                                       $"Runtime.GetNSObject<{thisType.ToString ()}> (self)" :
                                       $"SwiftObjectRegistry.Registry.CSObjectForSwiftObject <{thisType.ToString ()}> (self)";
                    invoker = new CSIndexExpression(registryCall, false, callParams.ToArray());
                }
            }
            else
            {
                if (thisIsInterface)
                {
                    invoker = new CSFunctionCall(
                        $"SwiftObjectRegistry.Registry.InterfaceForExistentialContainer<{thisType.ToString ()}> (self).{methodName}",
                        false, callParams.ToArray());
                }
                else
                {
                    var registryCall = isObjC ?
                                       $"Runtime.GetNSObject<{thisType.ToString ()}>(self).{methodName}" :
                                       $"SwiftObjectRegistry.Registry.CSObjectForSwiftObject <{thisType.ToString ()}> (self).{methodName}";
                    invoker = new CSFunctionCall(registryCall, false, callParams.ToArray());
                }
            }

            var    tryBlock   = funcDecl.HasThrows ? new CSCodeBlock() : null;
            var    catchBlock = funcDecl.HasThrows ? new CSCodeBlock() : null;
            var    altBody    = tryBlock ?? body;
            string catchName  = MarshalEngine.Uniqueify("e", identifiersUsed);
            var    catchID    = new CSIdentifier(catchName);


            altBody.AddRange(preMarshalCode);
            if (marshalingThrows)
            {
                return(altBody);
            }

            if (funcDecl.HasThrows || needsReturn)               // function that returns or getter
            {
                if (funcDecl.HasThrows)
                {
                    use.AddIfNotPresent(typeof(SwiftError));
                    use.AddIfNotPresent(typeof(Tuple));
                    use.AddIfNotPresent(typeof(StructMarshal));
                    CSType returnTuple = null;
                    if (needsReturn)
                    {
                        returnTuple = new CSSimpleType("Tuple", false,
                                                       methodType,
                                                       new CSSimpleType(typeof(SwiftError)),
                                                       CSSimpleType.Bool);
                    }
                    else
                    {
                        returnTuple = new CSSimpleType("Tuple", false,
                                                       new CSSimpleType(typeof(SwiftError)),
                                                       CSSimpleType.Bool);
                    }


                    if (needsReturn)
                    {
                        string retvalName = MarshalEngine.Uniqueify("retval", identifiersUsed);
                        var    retvalId   = new CSIdentifier(retvalName);
                        altBody.Add(CSFieldDeclaration.VarLine(methodType, retvalId, invoker));
                        postMarshalCode.Add(CSFunctionCall.FunctionCallLine("StructMarshal.Marshaler.ToSwift", false,
                                                                            methodType.Typeof(),
                                                                            retvalId,
                                                                            delegateParams [0].Name));
                        altBody.Add(CSFunctionCall.FunctionCallLine("StructMarshal.Marshaler.SetErrorNotThrown", false,
                                                                    delegateParams [0].Name, returnTuple.Typeof()));
                    }
                    else
                    {
                        if (isSetter)
                        {
                            altBody.Add(CSAssignment.Assign(invoker, CSAssignmentOperator.Assign, valueExpr));
                        }
                        else
                        {
                            altBody.Add(new CSLine(invoker));
                        }
                        altBody.Add(CSFunctionCall.FunctionCallLine("StructMarshal.Marshaler.SetErrorNotThrown", false,
                                                                    delegateParams [0].Name, returnTuple.Typeof()));
                    }
                    string swiftError           = MarshalEngine.Uniqueify("err", identifiersUsed);
                    var    swiftErrorIdentifier = new CSIdentifier(swiftError);
                    catchBlock.Add(CSFieldDeclaration.VarLine(new CSSimpleType(typeof(SwiftError)), swiftErrorIdentifier,
                                                              new CSFunctionCall("SwiftError.FromException", false, catchID)));
                    catchBlock.Add(CSFunctionCall.FunctionCallLine("StructMarshal.Marshaler.SetErrorThrown", false,
                                                                   delegateParams [0].Name,
                                                                   swiftErrorIdentifier,
                                                                   returnTuple.Typeof()));
                }
                else
                {
                    if (returnIsClass)
                    {
                        string       retvalName = MarshalEngine.Uniqueify("retval", identifiersUsed);
                        CSIdentifier retvalId   = new CSIdentifier(retvalName);
                        altBody.Add(CSFieldDeclaration.VarLine(methodType, retvalId, invoker));
                        postMarshalCode.Add(CSReturn.ReturnLine(
                                                NewClassCompiler.SafeBackingFieldAccessor(retvalId, use, returnEntity.Type.ToFullyQualifiedName(), typeMapper)));
                    }
                    else if (returnIsProtocol)
                    {
                        string retvalName = MarshalEngine.Uniqueify("retval", identifiersUsed);
                        identifiersUsed.Add(retvalName);
                        var retvalId = new CSIdentifier(retvalName);
                        altBody.Add(CSFieldDeclaration.VarLine(methodType, retvalId, invoker));
                        var returnContainer = MarshalEngine.Uniqueify("returnContainer", identifiersUsed);
                        identifiersUsed.Add(returnContainer);
                        var returnContainerId = new CSIdentifier(returnContainer);
                        var protoGetter       = new CSFunctionCall($"SwiftObjectRegistry.Registry.ExistentialContainerForProtocols", false, retvalId, methodType.Typeof());
                        var protoDecl         = CSVariableDeclaration.VarLine(CSSimpleType.Var, returnContainerId, protoGetter);
                        var marshalBack       = CSFunctionCall.FunctionCallLine($"{returnContainer}.CopyTo", delegateParams [0].Name);
                        postMarshalCode.Add(protoDecl);
                        postMarshalCode.Add(marshalBack);
                    }
                    else if (returnIsStruct)
                    {
                        // non-blitable means that the parameter is an IntPtr and we can call the
                        // marshaler to copy into it
                        use.AddIfNotPresent(typeof(StructMarshal));
                        var marshalCall = CSFunctionCall.FunctionCallLine("StructMarshal.Marshaler.ToSwift", false,
                                                                          invoker, delegateParams [0].Name);
                        altBody.Add(marshalCall);
                    }
                    else if (returnIsTuple)
                    {
                        // non-blitable means that the parameter is an IntPtr and we can call the
                        // marshaler to copy into it
                        use.AddIfNotPresent(typeof(StructMarshal));
                        var marshalCall = CSFunctionCall.FunctionCallLine("StructMarshal.Marshaler.ToSwift", false,
                                                                          invoker, delegateParams [0].Name);
                        altBody.Add(marshalCall);
                    }
                    else if (returnIsGeneric)
                    {
                        // T retval = invoker();
                        // if (retval is ISwiftObject) {
                        //     Marshal.WriteIntPtr(delegateParams [0].Name, ((ISwiftObject)retval).SwiftObject);
                        // }
                        // else {
                        //    StructMarshal.Marshaler.ToSwift(typeof(T), retval, delegateParams[0].Name);
                        // }
                        string retvalName = MarshalEngine.Uniqueify("retval", identifiersUsed);
                        var    retvalId   = new CSIdentifier(retvalName);
                        altBody.Add(CSFieldDeclaration.VarLine(methodType, retvalId, invoker));
                        var ifClause = new CSCodeBlock();
                        ifClause.Add(CSFunctionCall.FunctionCallLine("Marshal.WriteIntPtr", false,
                                                                     delegateParams [0].Name,
                                                                     new CSParenthesisExpression(new CSCastExpression("ISwiftObject", retvalId)).Dot(NewClassCompiler.kSwiftObjectGetter)));
                        var elseClause = new CSCodeBlock();
                        elseClause.Add(CSFunctionCall.FunctionCallLine("StructMarshal.Marshaler.ToSwift", false,
                                                                       methodType.Typeof(),
                                                                       retvalId,
                                                                       delegateParams [0].Name));
                        CSBaseExpression ifExpr = new CSSimpleType("ISwiftObject").Typeof().Dot(new CSFunctionCall("IsAssignableFrom", false,
                                                                                                                   methodType.Typeof()));

                        var retTest = new CSIfElse(ifExpr, ifClause, elseClause);
                        altBody.Add(retTest);
                    }
                    else
                    {
                        if (returnIsClosure)
                        {
                            invoker = MarshalEngine.BuildBlindClosureCall(invoker, methodType as CSSimpleType, use);
                        }
                        if (postMarshalCode.Count > 0)
                        {
                            string       retvalName = MarshalEngine.Uniqueify("retval", identifiersUsed);
                            CSIdentifier retvalId   = new CSIdentifier(retvalName);
                            altBody.Add(CSFieldDeclaration.VarLine(methodType, retvalId, invoker));
                            postMarshalCode.Add(CSReturn.ReturnLine(retvalId));
                        }
                        else
                        {
                            altBody.Add(CSReturn.ReturnLine(invoker));
                        }
                    }
                }
            }
            else                 // no return or setter
            {
                if (isSetter)
                {
                    altBody.Add(CSAssignment.Assign(invoker, CSAssignmentOperator.Assign, valueExpr));
                }
                else
                {
                    altBody.Add(new CSLine(invoker));
                }
            }
            altBody.AddRange(postMarshalCode);

            if (funcDecl.HasThrows)
            {
                body.Add(new CSTryCatch(tryBlock, new CSCatch(typeof(Exception), catchName, catchBlock)));
            }
            return(body);
        }
        public static CSNamespace CreateManagedConsoleRedirect()
        {
            // Same as GetManagedConsoleRedirectCode, just different format.
            var cs = new CSNamespace();

            var console = new CSClass(CSVisibility.Public, "Console", isStatic: true);

            console.Fields.Add(CSFieldDeclaration.FieldLine(CSSimpleType.String, new CSIdentifier("filename"), isStatic: true));
            console.Properties.Add(
                new CSProperty(
                    CSSimpleType.String,
                    CSMethodKind.Static,
                    new CSIdentifier("Filename"),
                    CSVisibility.None,
                    CSCodeBlock.Create(
                        new CSIfElse(
                            new CSBinaryExpression(
                                CSBinaryOperator.Equal,
                                new CSIdentifier("filename"),
                                new CSIdentifier("null")
                                ),
                            CSCodeBlock.Create(
                                CSAssignment.Assign(
                                    new CSIdentifier("filename"),
                                    new CSBinaryExpression(
                                        CSBinaryOperator.NullCoalesce,
                                        CSFunctionCall.Function(
                                            "Environment.GetEnvironmentVariable",
                                            CSConstant.Val("LEAKTEST_STDOUT_PATH")
                                            ),
                                        new CSIdentifier("string.Empty")
                                        )
                                    )
                                )
                            ),
                        CSReturn.ReturnLine(new CSIdentifier("filename"))
                        ),
                    CSVisibility.None,
                    null
                    )
                );
            console.Methods.Add(
                new CSMethod(
                    CSVisibility.Public,
                    CSMethodKind.Static,
                    CSSimpleType.Void,
                    new CSIdentifier("write"),
                    new CSParameterList(
                        new CSParameter(CSSimpleType.String, new CSIdentifier("value"))
                        ),
                    CSCodeBlock.Create(
                        new CSIfElse(
                            new CSIdentifier("string.IsNullOrEmpty (Filename)"),
                            CSCodeBlock.Create(CSFunctionCall.FunctionCallLine("global::System.Console.Write", new CSIdentifier("value"))),
                            CSCodeBlock.Create(CSFunctionCall.FunctionCallLine("System.IO.File.AppendAllText", new CSIdentifier("Filename"), new CSIdentifier("value")))
                            )
                        )
                    )
                );
            console.Methods.Add(
                new CSMethod(
                    CSVisibility.Public,
                    CSMethodKind.Static,
                    CSSimpleType.Void,
                    new CSIdentifier("Write"),
                    new CSParameterList(
                        new CSParameter(CSSimpleType.Object, new CSIdentifier("value"))
                        ),
                    CSCodeBlock.Create(
                        CSFunctionCall.FunctionCallLine(
                            "write",
                            false,
                            new CSIdentifier("value?.ToString ()")
                            )
                        )
                    )
                );
            console.Methods.Add(
                new CSMethod(
                    CSVisibility.Public,
                    CSMethodKind.Static,
                    CSSimpleType.Void,
                    new CSIdentifier("Write"),
                    new CSParameterList(
                        new CSParameter(CSSimpleType.String, new CSIdentifier("value")),
                        new CSParameter(CSSimpleType.CreateArray("object"), new CSIdentifier("args"), CSParameterKind.Params)
                        ),
                    CSCodeBlock.Create(
                        CSFunctionCall.FunctionCallLine(
                            "write",
                            false,
                            new CSIdentifier("value == null ? string.Empty : string.Format (value, args)")
                            )
                        )
                    )
                );
            console.Methods.Add(
                new CSMethod(
                    CSVisibility.Public,
                    CSMethodKind.Static,
                    CSSimpleType.Void,
                    new CSIdentifier("WriteLine"),
                    new CSParameterList(
                        new CSParameter(CSSimpleType.Object, new CSIdentifier("value"))
                        ),
                    CSCodeBlock.Create(
                        CSFunctionCall.FunctionCallLine(
                            "write",
                            false,
                            new CSIdentifier("value?.ToString () + Environment.NewLine")
                            )
                        )
                    )
                );
            console.Methods.Add(
                new CSMethod(
                    CSVisibility.Public,
                    CSMethodKind.Static,
                    CSSimpleType.Void,
                    new CSIdentifier("WriteLine"),
                    new CSParameterList(
                        new CSParameter(CSSimpleType.String, new CSIdentifier("value")),
                        new CSParameter(CSSimpleType.CreateArray("object"), new CSIdentifier("args"), CSParameterKind.Params)
                        ),
                    CSCodeBlock.Create(
                        CSFunctionCall.FunctionCallLine(
                            "write",
                            false,
                            new CSIdentifier("(value == null ? string.Empty : string.Format (value, args)) + Environment.NewLine")
                            )
                        )
                    )
                );
            cs.Block.Add(console);
            return(cs);
        }