// Copyright (c) 2010-2013 AlphaSierraPapa for the SharpDevelop Team
// 
// 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 System;

using ICSharpCode.Decompiler.TypeSystem;

namespace ICSharpCode.Decompiler.Semantics
{
	/// <summary>
	/// Represents the 'sizeof'.
	/// </summary>
	public class SizeOfResolveResult : ResolveResult
	{
		readonly IType referencedType;
		readonly int? constantValue;

		public SizeOfResolveResult(IType int32, IType referencedType, int? constantValue)
			: base(int32)
		{
			if (referencedType == null)
				throw new ArgumentNullException(nameof(referencedType));
			this.referencedType = referencedType;
			this.constantValue = constantValue;
		}

		/// <summary>
		/// The type referenced by the 'sizeof'.
		/// </summary>
		public IType ReferencedType {
			get { return referencedType; }
		}

		public override bool IsCompileTimeConstant {
			get {
				return constantValue != null;
			}
		}

		public override object ConstantValue {
			get {
				return constantValue;
			}
		}

		public override bool IsError {
			get {
				return referencedType.IsReferenceType != false;
			}
		}
	}
}