public abstract LoadToken ( System method ) : void | ||
method | System | The method to convert to a RuntimeMethodHandle. |
Результат | void |
/// <summary> /// Generates a method that does type conversion and calls the bound method. /// </summary> /// <param name="generator"> The ILGenerator used to output the body of the method. </param> /// <param name="argumentCount"> The number of arguments that will be passed to the delegate. </param> /// <returns> A delegate that does type conversion and calls the method represented by this /// object. </returns> protected override void GenerateStub(ILGenerator generator, int argumentCount) { // Determine the methods that have the correct number of arguments. var candidateMethods = new List<BinderMethod>(); foreach (var candidateMethod in this.targetMethods) { if (candidateMethod.IsArgumentCountCompatible(argumentCount) == true) candidateMethods.Add(candidateMethod); } // Zero candidates means no overload had the correct number of arguments. if (candidateMethods.Count == 0) { EmitHelpers.EmitThrow(generator, "TypeError", string.Format("No overload for method '{0}' takes {1} arguments", this.Name, argumentCount)); EmitHelpers.EmitDefaultValue(generator, PrimitiveType.Any); generator.Complete(); return; } // Select the method to call at run time. generator.LoadInt32(candidateMethods.Count); generator.NewArray(typeof(RuntimeMethodHandle)); for (int i = 0; i < candidateMethods.Count; i ++) { generator.Duplicate(); generator.LoadInt32(i); generator.LoadToken(candidateMethods[i]); generator.StoreArrayElement(typeof(RuntimeMethodHandle)); } generator.LoadArgument(0); generator.LoadArgument(1); generator.LoadArgument(2); generator.Call(ReflectionHelpers.BinderUtilities_ResolveOverloads); var endOfMethod = generator.CreateLabel(); for (int i = 0; i < candidateMethods.Count; i++) { // Check if this is the selected method. ILLabel endOfIf = null; if (i < candidateMethods.Count - 1) { generator.Duplicate(); generator.LoadInt32(i); endOfIf = generator.CreateLabel(); generator.BranchIfNotEqual(endOfIf); } generator.Pop(); var targetMethod = candidateMethods[i]; // Convert the arguments. foreach (var argument in targetMethod.GenerateArguments(generator, argumentCount)) { // Load the input parameter value. switch (argument.Source) { case BinderArgumentSource.ScriptEngine: generator.LoadArgument(0); break; case BinderArgumentSource.ThisValue: generator.LoadArgument(1); break; case BinderArgumentSource.InputParameter: generator.LoadArgument(2); generator.LoadInt32(argument.InputParameterIndex); generator.LoadArrayElement(typeof(object)); break; } // Convert to the target type. EmitConversionToType(generator, argument.Type, convertToAddress: argument.Source == BinderArgumentSource.ThisValue); } // Call the target method. targetMethod.GenerateCall(generator); // Convert the return value. if (targetMethod.ReturnType == typeof(void)) EmitHelpers.EmitUndefined(generator); else EmitConversionToObject(generator, targetMethod.ReturnType); // Branch to the end of the method if this was the selected method. if (endOfIf != null) { generator.Branch(endOfMethod); generator.DefineLabelPosition(endOfIf); } } generator.DefineLabelPosition(endOfMethod); generator.Complete(); }
/// <summary> /// Generates a method that does type conversion and calls the bound method. /// </summary> /// <param name="generator"> The ILGenerator used to output the body of the method. </param> /// <param name="argumentCount"> The number of arguments that will be passed to the delegate. </param> /// <returns> A delegate that does type conversion and calls the method represented by this /// object. </returns> protected override void GenerateStub(ILGenerator generator, int argumentCount) { // Determine the methods that have the correct number of arguments. var candidateMethods = new List <BinderMethod>(); foreach (var candidateMethod in this.targetMethods) { if (candidateMethod.IsArgumentCountCompatible(argumentCount) == true) { candidateMethods.Add(candidateMethod); } } // Zero candidates means no overload had the correct number of arguments. if (candidateMethods.Count == 0) { EmitHelpers.EmitThrow(generator, ErrorType.TypeError, string.Format("No overload for method '{0}' takes {1} arguments", this.Name, argumentCount)); EmitHelpers.EmitDefaultValue(generator, PrimitiveType.Any); generator.Complete(); return; } // Select the method to call at run time. generator.LoadInt32(candidateMethods.Count); generator.NewArray(typeof(RuntimeMethodHandle)); for (int i = 0; i < candidateMethods.Count; i++) { generator.Duplicate(); generator.LoadInt32(i); generator.LoadToken(candidateMethods[i]); generator.StoreArrayElement(typeof(RuntimeMethodHandle)); } generator.LoadArgument(0); generator.LoadArgument(1); generator.LoadArgument(2); generator.Call(ReflectionHelpers.BinderUtilities_ResolveOverloads); var endOfMethod = generator.CreateLabel(); for (int i = 0; i < candidateMethods.Count; i++) { // Check if this is the selected method. ILLabel endOfIf = null; if (i < candidateMethods.Count - 1) { generator.Duplicate(); generator.LoadInt32(i); endOfIf = generator.CreateLabel(); generator.BranchIfNotEqual(endOfIf); } generator.Pop(); var targetMethod = candidateMethods[i]; // Convert the arguments. foreach (var argument in targetMethod.GenerateArguments(generator, argumentCount)) { // Load the input parameter value. switch (argument.Source) { case BinderArgumentSource.ScriptEngine: generator.LoadArgument(0); break; case BinderArgumentSource.ThisValue: generator.LoadArgument(1); break; case BinderArgumentSource.InputParameter: generator.LoadArgument(2); generator.LoadInt32(argument.InputParameterIndex); generator.LoadArrayElement(typeof(object)); break; } // Convert to the target type. EmitConversionToType(generator, argument.Type, convertToAddress: argument.Source == BinderArgumentSource.ThisValue); } // Call the target method. targetMethod.GenerateCall(generator); // Convert the return value. if (targetMethod.ReturnType == typeof(void)) { EmitHelpers.EmitUndefined(generator); } else { EmitConversionToObject(generator, targetMethod.ReturnType); } // Branch to the end of the method if this was the selected method. if (endOfIf != null) { generator.Branch(endOfMethod); generator.DefineLabelPosition(endOfIf); } } generator.DefineLabelPosition(endOfMethod); generator.Complete(); }