/* ****************************************************************************
*
* 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{
/// <summary>
/// Class that contains helper methods for DLR CallSites.
/// </summary>
public static class CallSiteHelpers {
private static Type _knownNonDynamicMethodType = typeof(object).GetMethod("ToString").GetType();
/// <summary>
/// Checks if a <see cref="MethodBase"/> is internally used by DLR and should not
/// be displayed on the language code's stack.
/// </summary>
/// <param name="mb">The input <see cref="MethodBase"/></param>
/// <returns>
/// True if the input <see cref="MethodBase"/> is internally used by DLR and should not
/// be displayed on the language code's stack. Otherwise, false.
/// </returns>
[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;
}
}
}
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