ILSpy/ICSharpCode.Decompiler/IL/ILVariable.cs

// Copyright (c) 2014 Daniel Grunwald
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy of this
// software and associated documentation files (the "Software"), to deal in the Software
// without restriction, including without limitation the rights to use, copy, modify, merge,
// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
// to whom the Software is furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in all copies or
// substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.

using Mono.Cecil;
using Mono.Cecil.Cil;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ICSharpCode.Decompiler.IL
{
	enum VariableKind
	{
		Local,
		Parameter,
	}

	class ILVariable
	{
		public readonly VariableKind Kind;
		public readonly TypeReference Type;
		public readonly int Index;

		readonly object CecilObject;
		
		public ILVariable(VariableKind kind, TypeReference type, int index)
		{
			if (type == null)
				throw new ArgumentNullException("type");
			this.Kind = kind;
			this.Type = type;
			this.Index = index;
		}
		
		public ILVariable(VariableDefinition v)
			: this(VariableKind.Local, v.VariableType, v.Index)
		{
			this.CecilObject = v;
		}

		public ILVariable(ParameterDefinition p)
			: this(VariableKind.Parameter, p.ParameterType, p.Index)
		{
			this.CecilObject = p;
		}

		public override string ToString()
		{
			switch (Kind) {
				case VariableKind.Local:
					return "V_" + Index.ToString();
				case VariableKind.Parameter:
					if (Index == -1)
						return "this";
					return "P_" + Index.ToString();
				default:
					return Kind.ToString();
			}
		}

		internal void WriteTo(ITextOutput output)
		{
			output.WriteReference(this.ToString(), CecilObject ?? this, isLocal: true);
		}
	}
}