// 
// UsingStatement.cs
//  
// Author:
//       Mike Krüger <mkrueger@novell.com>
// 
// Copyright (c) 2009 Novell, Inc (http://www.novell.com)
// 
// 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.

namespace ICSharpCode.Decompiler.CSharp.Syntax
{
	/// <summary>
	/// <c>using_statement : 'await'? 'using' '(' resource_acquisition ')' embedded_statement ;</c> (C# grammar §13.14.1)
	/// <c>local_using_declaration : 'await'? 'using' non_ref_local_variable_declaration ';' statement_list? ;</c> (C# grammar §13.14.2)
	/// </summary>
	[DecompilerAstNode(hasNullNode: false)]
	public partial class UsingStatement : Statement
	{
		public static readonly TokenRole UsingKeywordRole = new TokenRole("using");
		public static readonly TokenRole AwaitRole = UnaryOperatorExpression.AwaitRole;
		public static readonly Role<AstNode> ResourceAcquisitionRole = new Role<AstNode>("ResourceAcquisition", AstNode.Null);

		public bool IsAsync { get; set; }

		public bool IsEnhanced { get; set; }

		/// <summary>
		/// Either a VariableDeclarationStatement, or an Expression.
		/// </summary>
		[Slot("ResourceAcquisitionRole")]
		public partial AstNode ResourceAcquisition { get; set; }

		[Slot("Roles.EmbeddedStatement")]
		public partial Statement EmbeddedStatement { get; set; }

		protected internal override bool DoMatch(AstNode other, PatternMatching.Match match)
		{
			UsingStatement o = other as UsingStatement;
			return o != null && this.IsAsync == o.IsAsync && this.ResourceAcquisition.DoMatch(o.ResourceAcquisition, match) && this.EmbeddedStatement.DoMatch(o.EmbeddedStatement, match);
		}
	}
}