/src/Boo.Lang.Compiler/Steps/AstAnnotations.cs

#region license

// Copyright (c) 2004, Rodrigo B. de Oliveira (rbo@acm.org)

// All rights reserved.

// 

// Redistribution and use in source and binary forms, with or without modification,

// are permitted provided that the following conditions are met:

// 

//     * Redistributions of source code must retain the above copyright notice,

//     this list of conditions and the following disclaimer.

//     * Redistributions in binary form must reproduce the above copyright notice,

//     this list of conditions and the following disclaimer in the documentation

//     and/or other materials provided with the distribution.

//     * Neither the name of Rodrigo B. de Oliveira nor the names of its

//     contributors may be used to endorse or promote products derived from this

//     software without specific prior written permission.

// 

// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND

// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE

// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER

// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,

// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#endregion



using Boo.Lang.Compiler.Ast;



namespace Boo.Lang.Compiler.Steps

{

	public class AstAnnotations

	{

		private static object TryBlockDepthKey = new object();

		public const string RawArrayIndexing = "rawarrayindexing";



		public const string Checked = "checked";

		

		public static void MarkChecked(Node node)

		{

			node[AstAnnotations.Checked] = true;

		}



		public static void MarkUnchecked(Node node)

		{

			node[AstAnnotations.Checked] = false;

		}

		

		public static bool IsChecked(Node node)

		{

			return IsChecked(node, true);

		}

		

		public static bool IsChecked(Node node, bool defaultValue)

		{

			return GetBoolAnnotationValue(node, AstAnnotations.Checked, defaultValue);

		}



		public static bool IsRawIndexing(Node node)

		{

			return GetBoolAnnotationValue(node, AstAnnotations.RawArrayIndexing, false);

		}



		public static bool GetBoolAnnotationValue(Node node, string annotation, bool defaultValue)

		{

			object value = node[annotation];

			return value is bool

			       	? (bool)value

			       	: defaultValue;

		}



		public static void MarkRawArrayIndexing(Node node)

		{

			node[AstAnnotations.RawArrayIndexing] = true;

		}



		public static void SetTryBlockDepth(Node node, int depth)

		{

			node[TryBlockDepthKey] = depth;

		}



		public static int GetTryBlockDepth(Node node)

		{

			return (int)node[TryBlockDepthKey];

		}

	}

}