CallSiteHelpers.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 / Actions / CallSiteHelpers.cs / 1305376 / CallSiteHelpers.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.Reflection; 
namespace System.Runtime.CompilerServices { 
    /// 
    /// Class that contains helper methods for DLR CallSites. 
    /// 
    public static class CallSiteHelpers {
        private static Type _knownNonDynamicMethodType = typeof(object).GetMethod("ToString").GetType();
 
        /// 
        /// Checks if a  is internally used by DLR and should not 
        /// be displayed on the language code's stack. 
        /// 
        /// The input  
        /// 
        /// True if the input  is internally used by DLR and should not
        /// be displayed on the language code's stack. Otherwise, false.
        ///  
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1011:ConsiderPassingBaseTypesAsParameters")]
        public static bool IsInternalFrame(MethodBase mb) { 
            //All the dynamic methods created for DLR rules have a special name. 
            //We also check if the method has a different type than the known
            //non-static method. If it does, it is a dynamic method. 
            //This could be improved if the CLR provides a way to attach some information
            //to the dynamic method we create, like CustomAttributes.
            if (mb.Name == "CallSite.Target" && mb.GetType() != _knownNonDynamicMethodType) {
                return true; 
            }
 
            //Filter out the helper methods. 
            if (mb.DeclaringType == typeof(System.Dynamic.UpdateDelegates)) {
                return true; 
            }

            return false;
        } 
    }
} 

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

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