How to use Emit method of Telerik.JustMock.Core.Castle.DynamicProxy.Generators.Emitters.SimpleAST.IfNullExpression class

Best JustMockLite code snippet using Telerik.JustMock.Core.Castle.DynamicProxy.Generators.Emitters.SimpleAST.IfNullExpression.Emit

MethodWithInvocationGenerator.cs

Source:MethodWithInvocationGenerator.cs

...15{16	using System;17	using System.Diagnostics;18	using System.Reflection;19	using System.Reflection.Emit;20#if FEATURE_SERIALIZATION21	using System.Xml.Serialization;22#endif23	using Telerik.JustMock.Core.Castle.Core.Internal;24	using Telerik.JustMock.Core.Castle.DynamicProxy.Contributors;25	using Telerik.JustMock.Core.Castle.DynamicProxy.Generators.Emitters;26	using Telerik.JustMock.Core.Castle.DynamicProxy.Generators.Emitters.SimpleAST;27	using Telerik.JustMock.Core.Castle.DynamicProxy.Internal;28	using Telerik.JustMock.Core.Castle.DynamicProxy.Tokens;29	internal class MethodWithInvocationGenerator : MethodGenerator30	{31		private readonly IInvocationCreationContributor contributor;32		private readonly GetTargetExpressionDelegate getTargetExpression;33		private readonly GetTargetExpressionDelegate getTargetTypeExpression;34		private readonly Reference interceptors;35		private readonly Type invocation;36		public MethodWithInvocationGenerator(MetaMethod method, Reference interceptors, Type invocation,37		                                     GetTargetExpressionDelegate getTargetExpression,38		                                     OverrideMethodDelegate createMethod, IInvocationCreationContributor contributor)39			: this(method, interceptors, invocation, getTargetExpression, null, createMethod, contributor)40		{41		}42		public MethodWithInvocationGenerator(MetaMethod method, Reference interceptors, Type invocation,43		                                     GetTargetExpressionDelegate getTargetExpression,44		                                     GetTargetExpressionDelegate getTargetTypeExpression,45		                                     OverrideMethodDelegate createMethod, IInvocationCreationContributor contributor)46			: base(method, createMethod)47		{48			this.invocation = invocation;49			this.getTargetExpression = getTargetExpression;50			this.getTargetTypeExpression = getTargetTypeExpression;51			this.interceptors = interceptors;52			this.contributor = contributor;53		}54		protected FieldReference BuildMethodInterceptorsField(ClassEmitter @class, MethodInfo method, INamingScope namingScope)55		{56			var methodInterceptors = @class.CreateField(57				namingScope.GetUniqueName(string.Format("interceptors_{0}", method.Name)),58				typeof(IInterceptor[]),59				false);60#if FEATURE_SERIALIZATION61			@class.DefineCustomAttributeFor<XmlIgnoreAttribute>(methodInterceptors);62#endif63			return methodInterceptors;64		}65		protected override MethodEmitter BuildProxiedMethodBody(MethodEmitter emitter, ClassEmitter @class, ProxyGenerationOptions options, INamingScope namingScope)66		{67			var invocationType = invocation;68			Trace.Assert(MethodToOverride.IsGenericMethod == invocationType.GetTypeInfo().IsGenericTypeDefinition);69			var genericArguments = Type.EmptyTypes;70			var constructor = invocation.GetConstructors()[0];71			Expression proxiedMethodTokenExpression;72			if (MethodToOverride.IsGenericMethod)73			{74				// bind generic method arguments to invocation's type arguments75				genericArguments = emitter.MethodBuilder.GetGenericArguments();76				invocationType = invocationType.MakeGenericType(genericArguments);77				constructor = TypeBuilder.GetConstructor(invocationType, constructor);78				// Not in the cache: generic method79				proxiedMethodTokenExpression = new MethodTokenExpression(MethodToOverride.MakeGenericMethod(genericArguments));80			}81			else82			{83				var proxiedMethodToken = @class.CreateStaticField(namingScope.GetUniqueName("token_" + MethodToOverride.Name), typeof(MethodInfo));84				@class.ClassConstructor.CodeBuilder.AddStatement(new AssignStatement(proxiedMethodToken, new MethodTokenExpression(MethodToOverride)));85				proxiedMethodTokenExpression = proxiedMethodToken.ToExpression();86			}87			var methodInterceptors = SetMethodInterceptors(@class, namingScope, emitter, proxiedMethodTokenExpression);88			var dereferencedArguments = IndirectReference.WrapIfByRef(emitter.Arguments);89			var hasByRefArguments = HasByRefArguments(emitter.Arguments);90			var arguments = GetCtorArguments(@class, proxiedMethodTokenExpression, dereferencedArguments, methodInterceptors);91			var ctorArguments = ModifyArguments(@class, arguments);92			var invocationLocal = emitter.CodeBuilder.DeclareLocal(invocationType);93			emitter.CodeBuilder.AddStatement(new AssignStatement(invocationLocal,94			                                                     new NewInstanceExpression(constructor, ctorArguments)));95			if (MethodToOverride.ContainsGenericParameters)96			{97				EmitLoadGenricMethodArguments(emitter, MethodToOverride.MakeGenericMethod(genericArguments), invocationLocal);98			}99			if (hasByRefArguments)100			{101				emitter.CodeBuilder.AddStatement(new TryStatement());102			}103			var proceed = new ExpressionStatement(new MethodInvocationExpression(invocationLocal, InvocationMethods.Proceed));104			emitter.CodeBuilder.AddStatement(proceed);105			if (hasByRefArguments)106			{107				emitter.CodeBuilder.AddStatement(new FinallyStatement());108			}109			GeneratorUtil.CopyOutAndRefParameters(dereferencedArguments, invocationLocal, MethodToOverride, emitter);110			if (hasByRefArguments)111			{112				emitter.CodeBuilder.AddStatement(new EndExceptionBlockStatement());113			}114			if (MethodToOverride.ReturnType != typeof(void))115			{116				var getRetVal = new MethodInvocationExpression(invocationLocal, InvocationMethods.GetReturnValue);117				// Emit code to ensure a value type return type is not null, otherwise the cast will cause a null-deref118				if (emitter.ReturnType.GetTypeInfo().IsValueType && !emitter.ReturnType.IsNullableType())119				{120					LocalReference returnValue = emitter.CodeBuilder.DeclareLocal(typeof(object));121					emitter.CodeBuilder.AddStatement(new AssignStatement(returnValue, getRetVal));122					emitter.CodeBuilder.AddExpression(new IfNullExpression(returnValue, new ThrowStatement(typeof(InvalidOperationException),123						"Interceptors failed to set a return value, or swallowed the exception thrown by the target")));124				}125				// Emit code to return with cast from ReturnValue126				emitter.CodeBuilder.AddStatement(new ReturnStatement(new ConvertExpression(emitter.ReturnType, getRetVal)));127			}128			else129			{130				emitter.CodeBuilder.AddStatement(new ReturnStatement());131			}132			return emitter;133		}134		private Expression SetMethodInterceptors(ClassEmitter @class, INamingScope namingScope, MethodEmitter emitter, Expression proxiedMethodTokenExpression)135		{136			var selector = @class.GetField("__selector");137			if(selector == null)138			{139				return null;140			}141			var methodInterceptorsField = BuildMethodInterceptorsField(@class, MethodToOverride, namingScope);142			Expression targetTypeExpression;143			if (getTargetTypeExpression != null)144			{145				targetTypeExpression = getTargetTypeExpression(@class, MethodToOverride);146			}147			else148			{149				targetTypeExpression = new MethodInvocationExpression(null, TypeUtilMethods.GetTypeOrNull, getTargetExpression(@class, MethodToOverride));150			}151			var emptyInterceptors = new NewArrayExpression(0, typeof(IInterceptor));152			var selectInterceptors = new MethodInvocationExpression(selector, InterceptorSelectorMethods.SelectInterceptors,153			                                                        targetTypeExpression,154			                                                        proxiedMethodTokenExpression, interceptors.ToExpression())155			{ VirtualCall = true };156			emitter.CodeBuilder.AddExpression(157				new IfNullExpression(methodInterceptorsField,158				                     new AssignStatement(methodInterceptorsField,159				                                         new NullCoalescingOperatorExpression(selectInterceptors, emptyInterceptors))));160			return methodInterceptorsField.ToExpression();161		}162		private void EmitLoadGenricMethodArguments(MethodEmitter methodEmitter, MethodInfo method, Reference invocationLocal)163		{164			var genericParameters = method.GetGenericArguments().FindAll(t => t.GetTypeInfo().IsGenericParameter);165			var genericParamsArrayLocal = methodEmitter.CodeBuilder.DeclareLocal(typeof(Type[]));166			methodEmitter.CodeBuilder.AddStatement(167				new AssignStatement(genericParamsArrayLocal, new NewArrayExpression(genericParameters.Length, typeof(Type))));168			for (var i = 0; i < genericParameters.Length; ++i)169			{170				methodEmitter.CodeBuilder.AddStatement(171					new AssignArrayStatement(genericParamsArrayLocal, i, new TypeTokenExpression(genericParameters[i])));172			}173			methodEmitter.CodeBuilder.AddExpression(174				new MethodInvocationExpression(invocationLocal,175				                               InvocationMethods.SetGenericMethodArguments,176				                               new ReferenceExpression(177					                               genericParamsArrayLocal)));178		}179		private Expression[] GetCtorArguments(ClassEmitter @class, Expression proxiedMethodTokenExpression, TypeReference[] dereferencedArguments, Expression methodInterceptors)180		{181			return new[]182			{183				getTargetExpression(@class, MethodToOverride),184				SelfReference.Self.ToExpression(),185				methodInterceptors ?? interceptors.ToExpression(),186				proxiedMethodTokenExpression,187				new ReferencesToObjectArrayExpression(dereferencedArguments)188			};189		}190		private Expression[] ModifyArguments(ClassEmitter @class, Expression[] arguments)191		{192			if (contributor == null)193			{194				return arguments;195			}196			return contributor.GetConstructorInvocationArguments(arguments, @class);197		}198		private bool HasByRefArguments(ArgumentReference[] arguments)199		{200			for (int i = 0; i < arguments.Length; i++ )201			{202				if (arguments[i].Type.GetTypeInfo().IsByRef)203				{204					return true;...

IfNullExpression.cs

Source:IfNullExpression.cs

...10// distributed under the License is distributed on an "AS IS" BASIS,11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.12// See the License for the specific language governing permissions and13// limitations under the License.14namespace Telerik.JustMock.Core.Castle.DynamicProxy.Generators.Emitters.SimpleAST15{16	using System;17	using System.Reflection.Emit;18	internal class IfNullExpression : Expression19	{20		private readonly IILEmitter ifNotNull;21		private readonly IILEmitter ifNull;22		private readonly Reference reference;23		private readonly Expression expression;24		public IfNullExpression(Reference reference, IILEmitter ifNull, IILEmitter ifNotNull = null)25		{26			this.reference = reference ?? throw new ArgumentNullException(nameof(reference));27			this.ifNull = ifNull;28			this.ifNotNull = ifNotNull;29		}30		public IfNullExpression(Expression expression, IILEmitter ifNull, IILEmitter ifNotNull = null)31		{32			this.expression = expression ?? throw new ArgumentNullException(nameof(expression));33			this.ifNull = ifNull;34			this.ifNotNull = ifNotNull;35		}36		public override void Emit(IMemberEmitter member, ILGenerator gen)37		{38			if (reference != null)39			{40				ArgumentsUtil.EmitLoadOwnerAndReference(reference, gen);41			}42			else if (expression != null)43			{44				expression.Emit(member, gen);45			}46			var notNull = gen.DefineLabel();47			gen.Emit(OpCodes.Brtrue_S, notNull);48			ifNull.Emit(member, gen);49			gen.MarkLabel(notNull);50			if (ifNotNull != null) // yeah, I know that reads funny :)51			{52				ifNotNull.Emit(member, gen);53			}54		}55	}56}...

Emit

Using AI Code Generation

1using System;2using System.Collections.Generic;3using System.Linq;4using System.Text;5using System.Threading.Tasks;6using Telerik.JustMock.Core.Castle.DynamicProxy.Generators.Emitters.SimpleAST;7{8    {9        static void Main(string[] args)10        {11            IfNullExpression ifNullExpression = new IfNullExpression();12            ifNullExpression.Emit(null, null);13        }14    }15}

Emit

Using AI Code Generation

1using System;2using System.Collections.Generic;3using System.Linq;4using System.Text;5using System.Threading.Tasks;6using Telerik.JustMock.Core.Castle.DynamicProxy.Generators.Emitters.SimpleAST;7{8    {9        static void Main(string[] args)10        {11            IfNullExpression ifNullExpression = new IfNullExpression();12            ifNullExpression.Emit(null);13        }14    }15}

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