public static EmitValue ( |
||
generator | The IL generator. | |
value | object | The value to emit. |
리턴 | void |
/// <summary> /// Pushes the result of converting <c>undefined</c> to the given type onto the stack. /// </summary> /// <param name="il"> The IL generator. </param> /// <param name="targetParameter"> The type to convert to, and optionally a default value. </param> private static void EmitUndefined(ILGenerator il, BinderArgument argument) { // Emit either the default value if there is one, otherwise emit "undefined". if (argument.HasDefaultValue == true) { // Emit the default value. EmitHelpers.EmitValue(il, argument.DefaultValue); } else { // Convert Undefined to the target type and emit. EmitHelpers.EmitUndefined(il); EmitTypeConversion(il, typeof(object), argument.Type); } }
/// <summary> /// Gets an enumerable list of argument objects, equal in size to /// <paramref name="argumentCount"/> while generating code to prepare those arguments for /// a method call. /// </summary> /// <param name="argumentCount"> The number of arguments to return. </param> /// <param name="generator"> The IL generator used to create an array if the method has a /// ParamArray parameter. </param> /// <returns> An enumerable list of argument objects. </returns> public IEnumerable <BinderArgument> GenerateArguments(ILGenerator generator, int argumentCount) { if (generator == null) { throw new ArgumentNullException(nameof(generator)); } int paramArrayIndex = 0; foreach (var argument in this.GetArguments(argumentCount)) { if (argument.IsParamArrayArgument == true) { if (paramArrayIndex == 0) { // This is the start of the ParamArray arguments. // Create an array. int paramArraySize = Math.Max(0, argumentCount - this.OptionalParameterCount - this.RequiredParameterCount); generator.LoadInt32(paramArraySize); generator.NewArray(argument.Type); } // Load the array and index. generator.Duplicate(); generator.LoadInt32(paramArrayIndex++); } // Yield will have the side effect of generating a value. yield return(argument); if (argument.IsParamArrayArgument == true) { // Store the value in the ParamArray array. generator.StoreArrayElement(argument.Type); } } // Populate any missing optional arguments with the default value. if (this.RequiredParameterCount + this.OptionalParameterCount - argumentCount > 0) { var parameters = this.GetParameters(); for (int i = 0; i < this.RequiredParameterCount + this.OptionalParameterCount - argumentCount; i++) { var optionalParameter = parameters[argumentCount + i]; if ((optionalParameter.Attributes & ParameterAttributes.HasDefault) == ParameterAttributes.HasDefault) { // Emit the default value. EmitHelpers.EmitValue(generator, new BinderArgument(optionalParameter, 0).DefaultValue); } else { // Emit default(T). EmitHelpers.EmitDefaultValue(generator, optionalParameter.ParameterType); } } } // Create an empty array if a ParamArray argument exists but no arguments were provided. if (this.HasParamArray == true && paramArrayIndex == 0) { // Create an array. generator.LoadInt32(0); generator.NewArray(this.ParamArrayElementType); } }