Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Core / Microsoft / Scripting / Utils / TypeExtensions.cs / 1305376 / TypeExtensions.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.Diagnostics; using System.Reflection; using System.Reflection.Emit; using System.Text; namespace System.Dynamic.Utils { // Extensions on System.Type and friends internal static class TypeExtensions { ////// Creates an open delegate for the given (dynamic)method. /// internal static Delegate CreateDelegate(this MethodInfo methodInfo, Type delegateType) { Debug.Assert(methodInfo != null && delegateType != null); var dm = methodInfo as DynamicMethod; if (dm != null) { return dm.CreateDelegate(delegateType); } else { return Delegate.CreateDelegate(delegateType, methodInfo); } } ////// Creates a closed delegate for the given (dynamic)method. /// internal static Delegate CreateDelegate(this MethodInfo methodInfo, Type delegateType, object target) { Debug.Assert(methodInfo != null && delegateType != null); var dm = methodInfo as DynamicMethod; if (dm != null) { return dm.CreateDelegate(delegateType, target); } else { return Delegate.CreateDelegate(delegateType, target, methodInfo); } } internal static Type GetReturnType(this MethodBase mi) { return (mi.IsConstructor) ? mi.DeclaringType : ((MethodInfo)mi).ReturnType; } private static readonly CacheDict_ParamInfoCache = new CacheDict (75); internal static ParameterInfo[] GetParametersCached(this MethodBase method) { ParameterInfo[] pis; lock (_ParamInfoCache) { if (!_ParamInfoCache.TryGetValue(method, out pis)) { pis = method.GetParameters(); Type t = method.DeclaringType; if (t != null && TypeUtils.CanCache(t)) { _ParamInfoCache[method] = pis; } } } return pis; } // Expression trees/compiler just use IsByRef, why do we need this? // (see LambdaCompiler.EmitArguments for usage in the compiler) internal static bool IsByRefParameter(this ParameterInfo pi) { // not using IsIn/IsOut properties as they are not available in Silverlight: if (pi.ParameterType.IsByRef) return true; return (pi.Attributes & (ParameterAttributes.Out)) == ParameterAttributes.Out; } // Returns the matching method if the parameter types are reference // assignable from the provided type arguments, otherwise null. internal static MethodInfo GetMethodValidated( this Type type, string name, BindingFlags bindingAttr, Binder binder, Type[] types, ParameterModifier[] modifiers) { var method = type.GetMethod(name, bindingAttr, binder, types, modifiers); return method.MatchesArgumentTypes(types) ? method : null; } /// /// Returns true if the method's parameter types are reference assignable from /// the argument types, otherwise false. /// /// An example that can make the method return false is that /// typeof(double).GetMethod("op_Equality", ..., new[] { typeof(double), typeof(int) }) /// returns a method with two double parameters, which doesn't match the provided /// argument types. /// ///private static bool MatchesArgumentTypes(this MethodInfo mi, Type[] argTypes) { if (mi == null || argTypes == null) { return false; } var ps = mi.GetParameters(); if (ps.Length != argTypes.Length) { return false; } for (int i = 0; i < ps.Length; i++) { if (!TypeUtils.AreReferenceAssignable(ps[i].ParameterType, argTypes[i])) { return false; } } return true; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. /* **************************************************************************** * * 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.Diagnostics; using System.Reflection; using System.Reflection.Emit; using System.Text; namespace System.Dynamic.Utils { // Extensions on System.Type and friends internal static class TypeExtensions { /// /// Creates an open delegate for the given (dynamic)method. /// internal static Delegate CreateDelegate(this MethodInfo methodInfo, Type delegateType) { Debug.Assert(methodInfo != null && delegateType != null); var dm = methodInfo as DynamicMethod; if (dm != null) { return dm.CreateDelegate(delegateType); } else { return Delegate.CreateDelegate(delegateType, methodInfo); } } ////// Creates a closed delegate for the given (dynamic)method. /// internal static Delegate CreateDelegate(this MethodInfo methodInfo, Type delegateType, object target) { Debug.Assert(methodInfo != null && delegateType != null); var dm = methodInfo as DynamicMethod; if (dm != null) { return dm.CreateDelegate(delegateType, target); } else { return Delegate.CreateDelegate(delegateType, target, methodInfo); } } internal static Type GetReturnType(this MethodBase mi) { return (mi.IsConstructor) ? mi.DeclaringType : ((MethodInfo)mi).ReturnType; } private static readonly CacheDict_ParamInfoCache = new CacheDict (75); internal static ParameterInfo[] GetParametersCached(this MethodBase method) { ParameterInfo[] pis; lock (_ParamInfoCache) { if (!_ParamInfoCache.TryGetValue(method, out pis)) { pis = method.GetParameters(); Type t = method.DeclaringType; if (t != null && TypeUtils.CanCache(t)) { _ParamInfoCache[method] = pis; } } } return pis; } // Expression trees/compiler just use IsByRef, why do we need this? // (see LambdaCompiler.EmitArguments for usage in the compiler) internal static bool IsByRefParameter(this ParameterInfo pi) { // not using IsIn/IsOut properties as they are not available in Silverlight: if (pi.ParameterType.IsByRef) return true; return (pi.Attributes & (ParameterAttributes.Out)) == ParameterAttributes.Out; } // Returns the matching method if the parameter types are reference // assignable from the provided type arguments, otherwise null. internal static MethodInfo GetMethodValidated( this Type type, string name, BindingFlags bindingAttr, Binder binder, Type[] types, ParameterModifier[] modifiers) { var method = type.GetMethod(name, bindingAttr, binder, types, modifiers); return method.MatchesArgumentTypes(types) ? method : null; } /// /// Returns true if the method's parameter types are reference assignable from /// the argument types, otherwise false. /// /// An example that can make the method return false is that /// typeof(double).GetMethod("op_Equality", ..., new[] { typeof(double), typeof(int) }) /// returns a method with two double parameters, which doesn't match the provided /// argument types. /// ///private static bool MatchesArgumentTypes(this MethodInfo mi, Type[] argTypes) { if (mi == null || argTypes == null) { return false; } var ps = mi.GetParameters(); if (ps.Length != argTypes.Length) { return false; } for (int i = 0; i < ps.Length; i++) { if (!TypeUtils.AreReferenceAssignable(ps[i].ParameterType, argTypes[i])) { return false; } } return true; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu

This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- FontSourceCollection.cs
- HtmlEncodedRawTextWriter.cs
- KnownTypes.cs
- Pair.cs
- SecurityContext.cs
- ZipIOBlockManager.cs
- OleDbCommandBuilder.cs
- DrawTreeNodeEventArgs.cs
- ValidationErrorEventArgs.cs
- RequiredFieldValidator.cs
- DataSourceSelectArguments.cs
- DataGridBoundColumn.cs
- DataGridViewCellEventArgs.cs
- ConstraintCollection.cs
- ProxyWebPartConnectionCollection.cs
- SessionSwitchEventArgs.cs
- XmlSerializerAssemblyAttribute.cs
- TaiwanLunisolarCalendar.cs
- ListView.cs
- DataBinder.cs
- Constants.cs
- GeneralTransformCollection.cs
- dataSvcMapFileLoader.cs
- ServiceBuildProvider.cs
- NotSupportedException.cs
- UserInitiatedNavigationPermission.cs
- ActivityExecutor.cs
- TreeViewImageGenerator.cs
- DoubleConverter.cs
- QueryContinueDragEvent.cs
- TemplateColumn.cs
- Helpers.cs
- FileDialog_Vista_Interop.cs
- ComponentEditorForm.cs
- ClientRolePrincipal.cs
- ProfileInfo.cs
- PlatformNotSupportedException.cs
- ClientSettingsStore.cs
- DataServiceRequest.cs
- FramingChannels.cs
- FocusWithinProperty.cs
- EncryptedKeyIdentifierClause.cs
- AttachedPropertyBrowsableForChildrenAttribute.cs
- ObjectCloneHelper.cs
- DefaultAsyncDataDispatcher.cs
- SqlGatherConsumedAliases.cs
- GridViewSelectEventArgs.cs
- WindowsListViewSubItem.cs
- RenderData.cs
- XmlElementAttribute.cs
- ExtentCqlBlock.cs
- ControlBindingsConverter.cs
- TextEditorMouse.cs
- ResourceAssociationSetEnd.cs
- DbProviderFactories.cs
- SessionStateItemCollection.cs
- QueuePathDialog.cs
- DetailsViewCommandEventArgs.cs
- Empty.cs
- Misc.cs
- XmlUnspecifiedAttribute.cs
- ByteAnimationBase.cs
- SHA512.cs
- _KerberosClient.cs
- ConfigurationValue.cs
- MetafileHeaderWmf.cs
- Certificate.cs
- WebPartTransformerCollection.cs
- ConvertersCollection.cs
- Cursor.cs
- Shape.cs
- CapabilitiesUse.cs
- MessagePropertyVariants.cs
- PathSegmentCollection.cs
- Annotation.cs
- EncryptedXml.cs
- XmlSchemaComplexType.cs
- CodeConstructor.cs
- XmlReaderDelegator.cs
- BindingWorker.cs
- UserControl.cs
- InfoCardConstants.cs
- Size.cs
- sqlmetadatafactory.cs
- ColorTranslator.cs
- FtpWebRequest.cs
- glyphs.cs
- ImageField.cs
- UnmanagedMemoryStream.cs
- DrawingState.cs
- CryptoStream.cs
- SerializationException.cs
- GridItemPatternIdentifiers.cs
- Vector3DCollectionConverter.cs
- SessionEndingEventArgs.cs
- IncrementalReadDecoders.cs
- SingleAnimationBase.cs
- DataGridViewElement.cs
- PagesSection.cs
- GridViewActionList.cs