/// <summary> /// Generates CIL for the expression. /// </summary> /// <param name="generator"> The generator to output the CIL to. </param> /// <param name="optimizationInfo"> Information about any optimizations that should be performed. </param> public override void GenerateCode(ILGenerator generator, OptimizationInfo optimizationInfo) { // Check if this is a direct call to eval(). if (this.Target is NameExpression && ((NameExpression)this.Target).Name == "eval") { GenerateEval(generator, optimizationInfo); return; } // Check if this is a super() call. if (this.Target is SuperExpression) { // executionContext.CallSuperClass(arguments) EmitHelpers.LoadExecutionContext(generator); GenerateArgumentsArray(generator, optimizationInfo); generator.Call(ReflectionHelpers.ExecutionContext_CallSuperClass); return; } // Emit the function instance first. ILLocalVariable targetBase = null; if (this.Target is MemberAccessExpression) { // The function is a member access expression (e.g. "Math.cos()"). // Evaluate the left part of the member access expression. var baseExpression = ((MemberAccessExpression)this.Target).Base; baseExpression.GenerateCode(generator, optimizationInfo); EmitConversion.ToAny(generator, baseExpression.ResultType); targetBase = generator.CreateTemporaryVariable(typeof(object)); generator.StoreVariable(targetBase); // Evaluate the right part of the member access expression. var memberAccessExpression = new MemberAccessExpression(((MemberAccessExpression)this.Target).Operator); memberAccessExpression.Push(new TemporaryVariableExpression(targetBase)); memberAccessExpression.Push(((MemberAccessExpression)this.Target).GetOperand(1)); memberAccessExpression.GenerateCode(generator, optimizationInfo); EmitConversion.ToAny(generator, this.Target.ResultType); } else { // Something else (e.g. "my_func()"). this.Target.GenerateCode(generator, optimizationInfo); EmitConversion.ToAny(generator, this.Target.ResultType); } // Check the object really is a function - if not, throw an exception. generator.Duplicate(); generator.IsInstance(typeof(FunctionInstance)); var endOfTypeCheck = generator.CreateLabel(); generator.BranchIfTrue(endOfTypeCheck); // Throw an nicely formatted exception. generator.Pop(); EmitHelpers.EmitThrow(generator, ErrorType.TypeError, string.Format("'{0}' is not a function", this.Target.ToString()), optimizationInfo); generator.DefineLabelPosition(endOfTypeCheck); // Pass in the path, function name and line. generator.ReinterpretCast(typeof(FunctionInstance)); generator.LoadStringOrNull(optimizationInfo.Source.Path); generator.LoadStringOrNull(optimizationInfo.FunctionName); generator.LoadInt32(optimizationInfo.SourceSpan.StartLine); // Generate code to produce the "this" value. There are three cases. if (this.Target is NameExpression) { // 1. The function is a name expression (e.g. "parseInt()"). // If we are inside a with() block, then there is an implicit 'this' value, // otherwise 'this' is undefined. Scope.GenerateReference(generator, optimizationInfo); generator.Call(ReflectionHelpers.RuntimeScope_ImplicitThis); } else if (this.Target is MemberAccessExpression targetMemberAccessExpression) { // 2. The function is a member access expression (e.g. "Math.cos()"). // In this case this = Math. // Unless it's a super call like super.blah(). if (targetMemberAccessExpression.Base is SuperExpression) { EmitHelpers.LoadThis(generator); } else { generator.LoadVariable(targetBase); } } else { // 3. Neither of the above (e.g. "(function() { return 5 })()") // In this case this = undefined. EmitHelpers.EmitUndefined(generator); } // Emit an array containing the function arguments. GenerateArgumentsArray(generator, optimizationInfo); // Call FunctionInstance.CallLateBound(thisValue, argumentValues) generator.Call(ReflectionHelpers.FunctionInstance_CallWithStackTrace); // Allow reuse of the temporary variable. if (targetBase != null) { generator.ReleaseTemporaryVariable(targetBase); } }
/// <summary> /// Generates CIL for the expression. /// </summary> /// <param name="generator"> The generator to output the CIL to. </param> /// <param name="optimizationInfo"> Information about any optimizations that should be performed. </param> public override void GenerateCode(ILGenerator generator, OptimizationInfo optimizationInfo) { // Check if this is a direct call to eval(). if (this.Target is NameExpression && ((NameExpression)this.Target).Name == "eval") { GenerateEval(generator, optimizationInfo); return; } // Emit the function instance first. ILLocalVariable targetBase = null; if (this.Target is MemberAccessExpression) { // The function is a member access expression (e.g. "Math.cos()"). // Evaluate the left part of the member access expression. var baseExpression = ((MemberAccessExpression)this.Target).Base; baseExpression.GenerateCode(generator, optimizationInfo); EmitConversion.ToAny(generator, baseExpression.ResultType); targetBase = generator.CreateTemporaryVariable(typeof(object)); generator.StoreVariable(targetBase); // Evaluate the right part of the member access expression. var memberAccessExpression = new MemberAccessExpression(((MemberAccessExpression)this.Target).Operator); memberAccessExpression.Push(new TemporaryVariableExpression(targetBase)); memberAccessExpression.Push(((MemberAccessExpression)this.Target).GetOperand(1)); memberAccessExpression.GenerateCode(generator, optimizationInfo); EmitConversion.ToAny(generator, this.Target.ResultType); } else { // Something else (e.g. "eval()"). this.Target.GenerateCode(generator, optimizationInfo); EmitConversion.ToAny(generator, this.Target.ResultType); } // Check the object really is a function - if not, throw an exception. generator.IsInstance(typeof(Library.FunctionInstance)); generator.Duplicate(); var endOfTypeCheck = generator.CreateLabel(); generator.BranchIfNotNull(endOfTypeCheck); // Throw an nicely formatted exception. generator.Pop(); EmitHelpers.EmitThrow(generator, "TypeError", string.Format("'{0}' is not a function", this.Target.ToString())); generator.DefineLabelPosition(endOfTypeCheck); // Generate code to produce the "this" value. There are three cases. if (this.Target is NameExpression) { // 1. The function is a name expression (e.g. "parseInt()"). // In this case this = scope.ImplicitThisValue, if there is one, otherwise undefined. ((NameExpression)this.Target).GenerateThis(generator); } else if (this.Target is MemberAccessExpression) { // 2. The function is a member access expression (e.g. "Math.cos()"). // In this case this = Math. //var baseExpression = ((MemberAccessExpression)this.Target).Base; //baseExpression.GenerateCode(generator, optimizationInfo); //EmitConversion.ToAny(generator, baseExpression.ResultType); generator.LoadVariable(targetBase); } else { // 3. Neither of the above (e.g. "(function() { return 5 })()") // In this case this = undefined. EmitHelpers.EmitUndefined(generator); } // Emit an array containing the function arguments. GenerateArgumentsArray(generator, optimizationInfo); // Call FunctionInstance.CallLateBound(thisValue, argumentValues) generator.Call(ReflectionHelpers.FunctionInstance_CallLateBound); // Allow reuse of the temporary variable. if (targetBase != null) { generator.ReleaseTemporaryVariable(targetBase); } }
/// <summary> /// Generates CIL for the expression. /// </summary> /// <param name="generator"> The generator to output the CIL to. </param> /// <param name="optimizationInfo"> Information about any optimizations that should be performed. </param> public override void GenerateCode(ILGenerator generator, OptimizationInfo optimizationInfo) { // Check if this is a direct call to eval(). if (this.Target is NameExpression && ((NameExpression)this.Target).Name == "eval") { GenerateEval(generator, optimizationInfo); return; } // Emit the function instance first. ILLocalVariable targetBase = null; if (this.Target is MemberAccessExpression) { // The function is a member access expression (e.g. "Math.cos()"). // Evaluate the left part of the member access expression. var baseExpression = ((MemberAccessExpression)this.Target).Base; baseExpression.GenerateCode(generator, optimizationInfo); EmitConversion.ToAny(generator, baseExpression.ResultType); targetBase = generator.CreateTemporaryVariable(typeof(object)); generator.StoreVariable(targetBase); // Evaluate the right part of the member access expression. var memberAccessExpression = new MemberAccessExpression(((MemberAccessExpression)this.Target).Operator); memberAccessExpression.Push(new TemporaryVariableExpression(targetBase)); memberAccessExpression.Push(((MemberAccessExpression)this.Target).GetOperand(1)); memberAccessExpression.GenerateCode(generator, optimizationInfo); EmitConversion.ToAny(generator, this.Target.ResultType); } else { // Something else (e.g. "eval()"). this.Target.GenerateCode(generator, optimizationInfo); EmitConversion.ToAny(generator, this.Target.ResultType); } // Check the object really is a function - if not, throw an exception. generator.IsInstance(typeof(Library.FunctionInstance)); generator.Duplicate(); var endOfTypeCheck = generator.CreateLabel(); generator.BranchIfNotNull(endOfTypeCheck); // Throw an nicely formatted exception. generator.Pop(); EmitHelpers.EmitThrow(generator, "TypeError", string.Format("'{0}' is not a function", this.Target.ToString())); generator.DefineLabelPosition(endOfTypeCheck); // Pass in the path, function name and line. generator.LoadStringOrNull(optimizationInfo.Source.Path); generator.LoadStringOrNull(optimizationInfo.FunctionName); generator.LoadInt32(optimizationInfo.SourceSpan.StartLine); // Generate code to produce the "this" value. There are three cases. if (this.Target is NameExpression) { // 1. The function is a name expression (e.g. "parseInt()"). // In this case this = scope.ImplicitThisValue, if there is one, otherwise undefined. ((NameExpression)this.Target).GenerateThis(generator); } else if (this.Target is MemberAccessExpression) { // 2. The function is a member access expression (e.g. "Math.cos()"). // In this case this = Math. //var baseExpression = ((MemberAccessExpression)this.Target).Base; //baseExpression.GenerateCode(generator, optimizationInfo); //EmitConversion.ToAny(generator, baseExpression.ResultType); generator.LoadVariable(targetBase); } else { // 3. Neither of the above (e.g. "(function() { return 5 })()") // In this case this = undefined. EmitHelpers.EmitUndefined(generator); } // Emit an array containing the function arguments. GenerateArgumentsArray(generator, optimizationInfo); // Call FunctionInstance.CallLateBound(thisValue, argumentValues) generator.Call(ReflectionHelpers.FunctionInstance_CallWithStackTrace); // Allow reuse of the temporary variable. if (targetBase != null) generator.ReleaseTemporaryVariable(targetBase); }