Helpers.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Core / Microsoft / Scripting / Utils / Helpers.cs / 1305376 / Helpers.cs
                        

                        
                             
/* ****************************************************************************
 *
 * Copyright (c) Microsoft Corporation.
 * 
 * This source code is subject to terms and conditions of the Microsoft Public License. A
 * copy of the license can be found in the License.html file at the root of this distribution. If 
 * you cannot locate the  Microsoft Public License, please send an email to 
 * dlr@microsoft.com. By using this source code in any fashion, you are agreeing to be bound
 * by the terms of the Microsoft Public License. 
 *
 * You must not remove this notice, or any other, from this software.
 *
 * 
 * ***************************************************************************/
 
using System.Collections.Generic; 
using System.Linq.Expressions;
 
namespace System.Dynamic.Utils {
    // Miscellaneous helpers that don't belong anywhere else
    internal static class Helpers {
 
        internal static T CommonNode(T first, T second, Func parent) where T : class {
            var cmp = EqualityComparer.Default; 
            if (cmp.Equals(first, second)) { 
                return first;
            } 
            var set = new Set(cmp);
            for (T t = first; t != null; t = parent(t)) {
                set.Add(t);
            } 
            for (T t = second; t != null; t = parent(t)) {
                if (set.Contains(t)) { 
                    return t; 
                }
            } 
            return null;
        }

        internal static void IncrementCount(T key, Dictionary dict) { 
            int count;
            dict.TryGetValue(key, out count); 
            dict[key] = count + 1; 
        }
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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