public abstract LoadField ( System field ) : void | ||
field | System | The field whose value will be pushed. |
리턴 | void |
/// <summary> /// Pops the value on the stack, converts it from one type to another, then pushes the /// result onto the stack. Undefined is converted to the given default value. /// </summary> /// <param name="generator"> The IL generator. </param> /// <param name="fromType"> The type to convert from. </param> /// <param name="targetParameter"> The type to convert to and the default value, if there is one. </param> private static void EmitTypeConversion(ILGenerator generator, Type fromType, BinderArgument argument) { // Emit either the default value if there is one, otherwise emit "undefined". if (argument.HasDefaultValue) { // Check if the input value is undefined. var elseClause = generator.CreateLabel(); generator.Duplicate(); generator.BranchIfNull(elseClause); generator.Duplicate(); generator.LoadField(ReflectionHelpers.Undefined_Value); generator.CompareEqual(); generator.BranchIfTrue(elseClause); // Convert as per normal. EmitTypeConversion(generator, fromType, argument.Type); // Jump to the end. var endOfIf = generator.CreateLabel(); generator.Branch(endOfIf); generator.DefineLabelPosition(elseClause); // Pop the existing value and emit the default value. generator.Pop(); EmitUndefined(generator, argument); // Define the end of the block. generator.DefineLabelPosition(endOfIf); } else { // Convert as per normal. EmitTypeConversion(generator, fromType, argument.Type); } }
/// <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) { // Check for the correct number of arguments. if (argumentCount != 0) { EmitHelpers.EmitThrow(generator, ErrorType.TypeError, "Wrong number of arguments"); EmitHelpers.EmitDefaultValue(generator, PrimitiveType.Any); generator.Complete(); return; } if (this.field.IsStatic == false) { generator.LoadArgument(1); ClrBinder.EmitConversionToType(generator, this.field.DeclaringType, convertToAddress: true); } generator.LoadField(this.field); ClrBinder.EmitConversionToObject(generator, this.field.FieldType); 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) { // Check for the correct number of arguments. if (argumentCount != 0) { EmitHelpers.EmitThrow(generator, "TypeError", "Wrong number of arguments"); EmitHelpers.EmitDefaultValue(generator, PrimitiveType.Any); generator.Complete(); return; } if (this.field.IsStatic == false) { generator.LoadArgument(1); ClrBinder.EmitConversionToType(generator, this.field.DeclaringType, convertToAddress: true); } generator.LoadField(this.field); ClrBinder.EmitConversionToObject(generator, this.field.FieldType); generator.Complete(); }
/// <summary> /// Emits null. /// </summary> /// <param name="generator"> The IL generator. </param> public static void EmitNull(ILGenerator generator) { generator.LoadField(ReflectionHelpers.Null_Value); }
/// <summary> /// Emits undefined. /// </summary> /// <param name="generator"> The IL generator. </param> public static void EmitUndefined(ILGenerator generator) { generator.LoadField(ReflectionHelpers.Undefined_Value); }
/// <summary> /// Emits null. /// </summary> /// <param name="generator"> The IL generator. </param> public static void EmitNull(ILGenerator generator) { generator.LoadField(ReflectionHelpers.Null_Value); }
/// <summary> /// Emits undefined. /// </summary> /// <param name="generator"> The IL generator. </param> public static void EmitUndefined(ILGenerator generator) { generator.LoadField(ReflectionHelpers.Undefined_Value); }
/// <summary> /// Pops the value on the stack, converts it from one type to another, then pushes the /// result onto the stack. Undefined is converted to the given default value. /// </summary> /// <param name="generator"> The IL generator. </param> /// <param name="fromType"> The type to convert from. </param> /// <param name="targetParameter"> The type to convert to and the default value, if there is one. </param> private static void EmitTypeConversion(ILGenerator generator, Type fromType, BinderArgument argument) { // Emit either the default value if there is one, otherwise emit "undefined". if (argument.HasDefaultValue) { // Check if the input value is undefined. var elseClause = generator.CreateLabel(); generator.Duplicate(); generator.BranchIfNull(elseClause); generator.Duplicate(); generator.LoadField(ReflectionHelpers.Undefined_Value); generator.CompareEqual(); generator.BranchIfTrue(elseClause); // Convert as per normal. EmitTypeConversion(generator, fromType, argument.Type); // Jump to the end. var endOfIf = generator.CreateLabel(); generator.Branch(endOfIf); generator.DefineLabelPosition(elseClause); // Pop the existing value and emit the default value. generator.Pop(); EmitUndefined(generator, argument); // Define the end of the block. generator.DefineLabelPosition(endOfIf); } else { // Convert as per normal. EmitTypeConversion(generator, fromType, argument.Type); } }