Implement IL codes for #91, #93, fix #105

IL2C.Core/ILConveters/StargConverters .cs

@@ -0,0 +1,67 @@
+/////////////////////////////////////////////////////////////////////////////////////////////////
+//
+// IL2C - A translator for ECMA-335 CIL/MSIL to C language.
+// Copyright (c) 2016-2019 Kouji Matsui (@kozy_kekyo, @kekyo2)
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//	http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+/////////////////////////////////////////////////////////////////////////////////////////////////
+
+using System;
+
+using Mono.Cecil.Cil;
+
+using IL2C.Translators;
+using IL2C.Metadata;
+
+namespace IL2C.ILConverters
+{
+    internal static class StargConverterUtilities
+    {
+        public static ExpressionEmitter Prepare(
+            int parameterIndex, DecodeContext decodeContext, bool isReference)
+        {
+            var parameter = decodeContext.Method.Parameters[parameterIndex];
+            var targetType = isReference ? parameter.TargetType.MakeByReference() : parameter.TargetType;
+            var symbol = decodeContext.PushStack(targetType);
+
+            return (extractContext, _) => new[] { string.Format(
+                "{0} = {1}{2}",
+                parameter.ParameterName,
+                // NOTE: Don't check "targetType.IsByReference" instead "isReference."
+                //   Because it's maybe double encoded byref type.
+                isReference ? "&" : string.Empty,
+                extractContext.GetSymbolName(symbol)) };
+        }
+    }
+
+    internal sealed class StargSConverter : ShortInlineParamConverter
+    {
+        public override OpCode OpCode => OpCodes.Starg_S;
+
+        public override ExpressionEmitter Prepare(VariableInformation operand, DecodeContext decodeContext)
+        {
+            return StargConverterUtilities.Prepare(operand.Index, decodeContext, false);
+        }
+    }
+
+    internal sealed class StargConverter : InlineParamConverter
+    {
+        public override OpCode OpCode => OpCodes.Starg;
+
+        public override ExpressionEmitter Prepare(VariableInformation operand, DecodeContext decodeContext)
+        {
+            return StargConverterUtilities.Prepare(operand.Index, decodeContext, false);
+        }
+    }
+}