public LoadBoolean ( bool value ) : void | ||
value | bool | The boolean to push onto the stack. |
리턴 | void |
/// <summary> /// Deletes the reference and pushes <c>true</c> if the delete succeeded, or <c>false</c> /// if the delete failed. /// </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 void GenerateDelete(ILGenerator generator, OptimizationInfo optimizationInfo) { // Load the left-hand side and convert to an object instance. var lhs = this.GetOperand(0); lhs.GenerateCode(generator, optimizationInfo); EmitConversion.ToObject(generator, lhs.ResultType, optimizationInfo); // Load the property name and convert to a string. var rhs = this.GetOperand(1); if (this.OperatorType == OperatorType.MemberAccess && rhs is NameExpression) { generator.LoadString((rhs as NameExpression).Name); } else { rhs.GenerateCode(generator, optimizationInfo); EmitConversion.ToString(generator, rhs.ResultType); } // Call Delete() generator.LoadBoolean(optimizationInfo.StrictMode); generator.Call(ReflectionHelpers.ObjectInstance_Delete); // If the return value is not wanted then pop it from the stack. //if (optimizationInfo.SuppressReturnValue == true) // generator.Pop(); }
/// <summary> /// Generates CIL for a call to eval(). /// </summary> /// <param name="generator"> The generator to output the CIL to. </param> /// <param name="optimizationInfo"> Information about any optimizations that should be performed. </param> private void GenerateEval(ILGenerator generator, OptimizationInfo optimizationInfo) { // engine EmitHelpers.LoadScriptEngine(generator); // code if (this.OperandCount < 2) { // No arguments were supplied. generator.LoadNull(); } else { // Take the first argument and convert it to a string. GenerateArgumentsArray(generator, optimizationInfo); generator.LoadInt32(0); generator.LoadArrayElement(typeof(object)); } // scope EmitHelpers.LoadScope(generator); // thisObject EmitHelpers.LoadThis(generator); // strictMode generator.LoadBoolean(optimizationInfo.StrictMode); // Call Global.Eval(engine, code, scope, thisValue, strictMode) generator.Call(ReflectionHelpers.Global_Eval); }
/// <summary> /// Emits the given value. Only possible for certain types. /// </summary> /// <param name="generator"> The IL generator. </param> /// <param name="value"> The value to emit. </param> public static void EmitValue(ILGenerator generator, object value) { if (value == null) generator.LoadNull(); else { switch (Type.GetTypeCode(value.GetType())) { case TypeCode.Boolean: generator.LoadBoolean((bool)value); break; case TypeCode.Byte: generator.LoadInt32((byte)value); break; case TypeCode.Char: generator.LoadInt32((char)value); break; case TypeCode.Double: generator.LoadDouble((double)value); break; case TypeCode.Int16: generator.LoadInt32((short)value); break; case TypeCode.Int32: generator.LoadInt32((int)value); break; case TypeCode.Int64: generator.LoadInt64((long)value); break; case TypeCode.SByte: generator.LoadInt32((sbyte)value); break; case TypeCode.Single: generator.LoadDouble((float)value); break; case TypeCode.String: generator.LoadString((string)value); break; case TypeCode.UInt16: generator.LoadInt32((ushort)value); break; case TypeCode.UInt32: generator.LoadInt32((uint)value); break; case TypeCode.UInt64: generator.LoadInt64((ulong)value); break; case TypeCode.Object: case TypeCode.Empty: case TypeCode.DateTime: case TypeCode.DBNull: case TypeCode.Decimal: throw new NotImplementedException(string.Format("Cannot emit the value '{0}'", value)); } } }
/// <summary> /// Generates an array containing the argument values for a tagged template literal. /// </summary> /// <param name="generator"> The generator to output the CIL to. </param> /// <param name="optimizationInfo"> Information about any optimizations that should be performed. </param> /// <param name="templateLiteral"> The template literal expression containing the parameter /// values. </param> internal void GenerateTemplateArgumentsArray(ILGenerator generator, OptimizationInfo optimizationInfo, TemplateLiteralExpression templateLiteral) { // Generate an array containing the value of each argument. generator.LoadInt32(templateLiteral.Values.Count + 1); generator.NewArray(typeof(object)); // Load the first parameter. generator.Duplicate(); generator.LoadInt32(0); // The first parameter to the tag function is an array of strings. var stringsExpression = new List <Expression>(templateLiteral.Strings.Count); foreach (var templateString in templateLiteral.Strings) { stringsExpression.Add(new LiteralExpression(templateString)); } new LiteralExpression(stringsExpression).GenerateCode(generator, optimizationInfo); generator.Duplicate(); // Now we need the name of the property. generator.LoadString("raw"); // Now generate an array of raw strings. var rawStringsExpression = new List <Expression>(templateLiteral.RawStrings.Count); foreach (var rawString in templateLiteral.RawStrings) { rawStringsExpression.Add(new LiteralExpression(rawString)); } new LiteralExpression(rawStringsExpression).GenerateCode(generator, optimizationInfo); // Freeze array by calling ObjectInstance Freeze(ObjectInstance). generator.CallStatic(ReflectionHelpers.ObjectConstructor_Freeze); // Now store the raw strings as a property of the base strings array. generator.LoadBoolean(optimizationInfo.StrictMode); generator.Call(ReflectionHelpers.ObjectInstance_SetPropertyValue_Object); // Freeze array by calling ObjectInstance Freeze(ObjectInstance). generator.CallStatic(ReflectionHelpers.ObjectConstructor_Freeze); // Store in the array. generator.StoreArrayElement(typeof(object)); // Values are passed as subsequent parameters. for (int i = 0; i < templateLiteral.Values.Count; i++) { generator.Duplicate(); generator.LoadInt32(i + 1); templateLiteral.Values[i].GenerateCode(generator, optimizationInfo); EmitConversion.ToAny(generator, templateLiteral.Values[i].ResultType); generator.StoreArrayElement(typeof(object)); } }
/// <summary> /// Generates code that initializes the variable and function declarations. /// </summary> /// <param name="generator"> The generator to output the CIL to. </param> /// <param name="optimizationInfo"> Information about any optimizations that should be performed. </param> internal virtual void GenerateDeclarations(ILGenerator generator, OptimizationInfo optimizationInfo) { // Initialize the declared variables and functions. foreach (var variable in this.variables.Values) { // Emit the initialization code. if (this is ObjectScope) { // Determine the property attributes. var attributes = Library.PropertyAttributes.Enumerable; if (variable.Writable == true) { attributes |= Library.PropertyAttributes.Writable; } if (variable.Deletable == true) { attributes |= Library.PropertyAttributes.Configurable; } if (variable.ValueAtTopOfScope == null) { // void InitializeMissingProperty(object key, PropertyAttributes attributes) EmitHelpers.LoadScope(generator); generator.CastClass(typeof(ObjectScope)); generator.Call(ReflectionHelpers.ObjectScope_ScopeObject); generator.LoadString(variable.Name); generator.LoadInt32((int)attributes); generator.Call(ReflectionHelpers.ObjectInstance_InitializeMissingProperty); } else { // bool DefineProperty(string propertyName, PropertyDescriptor descriptor, bool throwOnError) EmitHelpers.LoadScope(generator); generator.CastClass(typeof(ObjectScope)); generator.Call(ReflectionHelpers.ObjectScope_ScopeObject); generator.LoadString(variable.Name); variable.ValueAtTopOfScope.GenerateCode(generator, optimizationInfo); EmitConversion.Convert(generator, variable.ValueAtTopOfScope.ResultType, PrimitiveType.Any, optimizationInfo); generator.LoadInt32((int)attributes); generator.NewObject(ReflectionHelpers.PropertyDescriptor_Constructor2); generator.LoadBoolean(false); generator.Call(ReflectionHelpers.ObjectInstance_DefineProperty); generator.Pop(); } } else if (variable.ValueAtTopOfScope != null) { variable.ValueAtTopOfScope.GenerateCode(generator, optimizationInfo); var name = new NameExpression(this, variable.Name); name.GenerateSet(generator, optimizationInfo, variable.ValueAtTopOfScope.ResultType, false); } } }
/// <summary> /// Generates code that creates a new scope. /// </summary> /// <param name="generator"> The generator to output the CIL to. </param> /// <param name="optimizationInfo"> Information about any optimizations that should be performed. </param> internal override void GenerateScopeCreation(ILGenerator generator, OptimizationInfo optimizationInfo) { // Create a new runtime object scope. EmitHelpers.LoadScope(generator); // parent scope if (this.ScopeObjectExpression == null) { EmitHelpers.LoadScriptEngine(generator); generator.Call(ReflectionHelpers.ScriptEngine_Global); } else { this.ScopeObjectExpression.GenerateCode(generator, optimizationInfo); EmitConversion.ToObject(generator, this.ScopeObjectExpression.ResultType, optimizationInfo); } generator.LoadBoolean(this.ProvidesImplicitThisValue); generator.LoadBoolean(this.CanDeclareVariables); generator.Call(ReflectionHelpers.ObjectScope_CreateRuntimeScope); // Save the new scope. EmitHelpers.StoreScope(generator); }
/// <summary> /// Generates CIL for the delete 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> private void GenerateDelete(ILGenerator generator, OptimizationInfo optimizationInfo) { // Attempting to delete something that isn't a reference returns true but otherwise does nothing. if ((this.Operand is IReferenceExpression) == false) { // Make sure the expression is evaluated. this.Operand.GenerateCode(generator, optimizationInfo); // Discard the result and return true. generator.Pop(); generator.LoadBoolean(true); return; } // The operand is a variable or property reference. ((IReferenceExpression)this.Operand).GenerateDelete(generator, optimizationInfo); }
/// <summary> /// Deletes the reference and pushes <c>true</c> if the delete succeeded, or <c>false</c> /// if the delete failed. /// </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 void GenerateDelete(ILGenerator generator, OptimizationInfo optimizationInfo) { // Load the left-hand side and convert to an object instance. var lhs = this.GetOperand(0); if (lhs is SuperExpression) { // Deleting a super reference is not allowed. EmitHelpers.EmitThrow(generator, ErrorType.ReferenceError, "Unsupported reference to 'super'."); generator.LoadNull(); // Extraneous, but helps with verification. return; } lhs.GenerateCode(generator, optimizationInfo); EmitConversion.ToObject(generator, lhs.ResultType, optimizationInfo); // Load the property name and convert to a string. var rhs = this.GetOperand(1); if (this.OperatorType == OperatorType.MemberAccess) { // delete a.b if (rhs is NameExpression nameExpession) { generator.LoadString(nameExpession.Name); } else { throw new SyntaxErrorException("Invalid member access", optimizationInfo.SourceSpan.StartLine, optimizationInfo.Source.Path, optimizationInfo.FunctionName); } } else { // delete a['1'] rhs.GenerateCode(generator, optimizationInfo); EmitConversion.ToPropertyKey(generator, rhs.ResultType); } // Call Delete() generator.LoadBoolean(optimizationInfo.StrictMode); generator.Call(ReflectionHelpers.ObjectInstance_Delete); // If the return value is not wanted then pop it from the stack. //if (optimizationInfo.SuppressReturnValue == true) // generator.Pop(); }
/// <summary> /// Generates CIL to set the display name of the function. The function should be on top of the stack. /// </summary> /// <param name="generator"> The generator to output the CIL to. </param> /// <param name="optimizationInfo"> Information about any optimizations that should be performed. </param> /// <param name="displayName"> The display name of the function. </param> /// <param name="force"> <c>true</c> to set the displayName property, even if the function has a name already. </param> public void GenerateDisplayName(ILGenerator generator, OptimizationInfo optimizationInfo, string displayName, bool force) { if (displayName == null) { throw new ArgumentNullException(nameof(displayName)); } // We only infer names for functions if the function doesn't have a name. if (force == true || string.IsNullOrEmpty(this.FunctionName)) { // Statically set the display name. this.context.DisplayName = displayName; // Generate code to set the display name at runtime. generator.Duplicate(); generator.LoadString("displayName"); generator.LoadString(displayName); generator.LoadBoolean(false); generator.Call(ReflectionHelpers.ObjectInstance_SetPropertyValue_Object); } }
/// <summary> /// Deletes the reference and pushes <c>true</c> if the delete succeeded, or <c>false</c> /// if the delete failed. /// </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 void GenerateDelete(ILGenerator generator, OptimizationInfo optimizationInfo) { // Deleting a variable is not allowed in strict mode. if (optimizationInfo.StrictMode == true) { throw new SyntaxErrorException($"Cannot delete {Name} because deleting a variable or argument is not allowed in strict mode", optimizationInfo.SourceSpan.StartLine, optimizationInfo.Source.Path, optimizationInfo.FunctionName); } // If we have allocated an IL variable, then always return false, as we don't support // optimizing deletable variables. var variableInfo = Scope.FindStaticVariable(Name); if (variableInfo != null && variableInfo.Store != null) { generator.LoadBoolean(false); return; } Scope.GenerateReference(generator, optimizationInfo); generator.LoadString(Name); generator.Call(ReflectionHelpers.RuntimeScope_Delete); }
/// <summary> /// Deletes the reference and pushes <c>true</c> if the delete succeeded, or <c>false</c> /// if the delete failed. /// </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 void GenerateDelete(ILGenerator generator, OptimizationInfo optimizationInfo) { // Deleting a variable is not allowed in strict mode. if (optimizationInfo.StrictMode == true) throw new JavaScriptException(optimizationInfo.Engine, ErrorType.SyntaxError, string.Format("Cannot delete {0} because deleting a variable or argument is not allowed in strict mode", this.Name), optimizationInfo.SourceSpan.StartLine, optimizationInfo.Source.Path, optimizationInfo.FunctionName); var endOfDelete = generator.CreateLabel(); var scope = this.Scope; ILLocalVariable scopeVariable = generator.CreateTemporaryVariable(typeof(Scope)); EmitHelpers.LoadScope(generator); generator.StoreVariable(scopeVariable); do { if (scope is DeclarativeScope) { var variable = scope.GetDeclaredVariable(this.Name); if (variable != null) { // The variable is known at compile-time. if (variable.Deletable == false) { // The variable cannot be deleted - return false. generator.LoadBoolean(false); } else { // The variable can be deleted (it was declared inside an eval()). // Delete the variable. generator.LoadVariable(scopeVariable); generator.CastClass(typeof(DeclarativeScope)); generator.LoadString(this.Name); generator.Call(ReflectionHelpers.Scope_Delete); } break; } else { // The variable was not defined at compile time, but may have been // introduced by an eval() statement. if (optimizationInfo.MethodOptimizationHints.HasEval == true) { // Check the variable exists: if (scope.HasValue(variableName) == true) { generator.LoadVariable(scopeVariable); generator.CastClass(typeof(DeclarativeScope)); generator.LoadString(this.Name); generator.Call(ReflectionHelpers.Scope_HasValue); var hasValueClause = generator.CreateLabel(); generator.BranchIfFalse(hasValueClause); // If the variable does exist, return true. generator.LoadVariable(scopeVariable); generator.CastClass(typeof(DeclarativeScope)); generator.LoadString(this.Name); generator.Call(ReflectionHelpers.Scope_Delete); generator.Branch(endOfDelete); // } generator.DefineLabelPosition(hasValueClause); } } } else { // Check if the property exists by calling scope.ScopeObject.HasProperty(propertyName) generator.LoadVariable(scopeVariable); generator.CastClass(typeof(ObjectScope)); generator.Call(ReflectionHelpers.ObjectScope_ScopeObject); generator.Duplicate(); generator.LoadString(this.Name); generator.Call(ReflectionHelpers.ObjectInstance_HasProperty); // Jump past the delete if the property doesn't exist. var endOfExistsCheck = generator.CreateLabel(); generator.BranchIfFalse(endOfExistsCheck); // Call scope.ScopeObject.Delete(key, false) generator.LoadString(this.Name); generator.LoadBoolean(false); generator.Call(ReflectionHelpers.ObjectInstance_Delete); generator.Branch(endOfDelete); generator.DefineLabelPosition(endOfExistsCheck); generator.Pop(); // If the name is not defined, return true. if (scope.ParentScope == null) { generator.LoadBoolean(true); } } // Try the parent scope. if (scope.ParentScope != null && scope.ExistsAtRuntime == true) { generator.LoadVariable(scopeVariable); generator.Call(ReflectionHelpers.Scope_ParentScope); generator.StoreVariable(scopeVariable); } scope = scope.ParentScope; } while (scope != null); // Release the temporary variable. generator.ReleaseTemporaryVariable(scopeVariable); // Define a label at the end. generator.DefineLabelPosition(endOfDelete); // Delete obviously has side-effects so we evaluate the return value then pop it from // the stack. //if (optimizationInfo.SuppressReturnValue == true) // generator.Pop(); }
/// <summary> /// Stores the value on the top of the stack in the reference. /// </summary> /// <param name="generator"> The generator to output the CIL to. </param> /// <param name="optimizationInfo"> Information about any optimizations that should be performed. </param> /// <param name="valueType"> The primitive type of the value that is on the top of the stack. </param> /// <param name="throwIfUnresolvable"> <c>true</c> to throw a ReferenceError exception if /// the name is unresolvable; <c>false</c> to create a new property instead. </param> public void GenerateSet(ILGenerator generator, OptimizationInfo optimizationInfo, PrimitiveType valueType, bool throwIfUnresolvable) { string propertyName = null; TypeOfMemberAccess memberAccessType = DetermineTypeOfMemberAccess(optimizationInfo, out propertyName); if (memberAccessType == TypeOfMemberAccess.ArrayIndex) { // Array indexer // ------------- // xxx = object[index] // Call the indexer. EmitConversion.ToAny(generator, valueType); generator.LoadBoolean(optimizationInfo.StrictMode); generator.Call(ReflectionHelpers.ObjectInstance_SetPropertyValue_Int); } else if (memberAccessType == TypeOfMemberAccess.Static) { // Named property modification (e.g. x.property = y) // ------------------------------------------------- // __object_cacheKey = null; // __object_property_cachedIndex = 0; // ... // if (__object_cacheKey != object.InlineCacheKey) // object.InlineSetPropertyValue("property", value, strictMode, out __object_property_cachedIndex, out __object_cacheKey) // else // object.InlinePropertyValues[__object_property_cachedIndex] = value; // Convert the value to an object and store it in a temporary variable. var value = generator.CreateTemporaryVariable(typeof(object)); EmitConversion.ToAny(generator, valueType); generator.StoreVariable(value); // TODO: share these variables somehow. var cacheKey = generator.DeclareVariable(typeof(object)); var cachedIndex = generator.DeclareVariable(typeof(int)); // Store the object into a temp variable. var objectInstance = generator.DeclareVariable(PrimitiveType.Object); generator.StoreVariable(objectInstance); // if (__object_cacheKey != object.InlineCacheKey) generator.LoadVariable(cacheKey); generator.LoadVariable(objectInstance); generator.Call(ReflectionHelpers.ObjectInstance_InlineCacheKey); var elseClause = generator.CreateLabel(); generator.BranchIfEqual(elseClause); // xxx = object.InlineSetPropertyValue("property", value, strictMode, out __object_property_cachedIndex, out __object_cacheKey) generator.LoadVariable(objectInstance); generator.LoadString(propertyName); generator.LoadVariable(value); generator.LoadBoolean(optimizationInfo.StrictMode); generator.LoadAddressOfVariable(cachedIndex); generator.LoadAddressOfVariable(cacheKey); generator.Call(ReflectionHelpers.ObjectInstance_InlineSetPropertyValue); var endOfIf = generator.CreateLabel(); generator.Branch(endOfIf); // else generator.DefineLabelPosition(elseClause); // object.InlinePropertyValues[__object_property_cachedIndex] = value; generator.LoadVariable(objectInstance); generator.Call(ReflectionHelpers.ObjectInstance_InlinePropertyValues); generator.LoadVariable(cachedIndex); generator.LoadVariable(value); generator.StoreArrayElement(typeof(object)); // End of the if statement generator.DefineLabelPosition(endOfIf); // The temporary variable is no longer needed. generator.ReleaseTemporaryVariable(value); } else { // Dynamic property access // ----------------------- // xxx = object.Get(x) // Call the indexer. EmitConversion.ToAny(generator, valueType); generator.LoadBoolean(optimizationInfo.StrictMode); generator.Call(ReflectionHelpers.ObjectInstance_SetPropertyValue_Object); } }
/// <summary> /// Deletes the reference and pushes <c>true</c> if the delete succeeded, or <c>false</c> /// if the delete failed. /// </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 void GenerateDelete(ILGenerator generator, OptimizationInfo optimizationInfo) { // Deleting a variable is not allowed in strict mode. if (optimizationInfo.StrictMode == true) { throw new JavaScriptException(optimizationInfo.Engine, ErrorType.SyntaxError, string.Format("Cannot delete {0} because deleting a variable or argument is not allowed in strict mode", this.Name), optimizationInfo.SourceSpan.StartLine, optimizationInfo.Source.Path, optimizationInfo.FunctionName); } var endOfDelete = generator.CreateLabel(); var scope = this.Scope; ILLocalVariable scopeVariable = generator.CreateTemporaryVariable(typeof(Scope)); EmitHelpers.LoadScope(generator); generator.StoreVariable(scopeVariable); do { if (scope is DeclarativeScope) { var variable = scope.GetDeclaredVariable(this.Name); if (variable != null) { // The variable is known at compile-time. if (variable.Deletable == false) { // The variable cannot be deleted - return false. generator.LoadBoolean(false); } else { // The variable can be deleted (it was declared inside an eval()). // Delete the variable. generator.LoadVariable(scopeVariable); generator.CastClass(typeof(DeclarativeScope)); generator.LoadString(this.Name); generator.Call(ReflectionHelpers.Scope_Delete); } break; } else { // The variable was not defined at compile time, but may have been // introduced by an eval() statement. if (optimizationInfo.MethodOptimizationHints.HasEval == true) { // Check the variable exists: if (scope.HasValue(variableName) == true) { generator.LoadVariable(scopeVariable); generator.CastClass(typeof(DeclarativeScope)); generator.LoadString(this.Name); generator.Call(ReflectionHelpers.Scope_HasValue); var hasValueClause = generator.CreateLabel(); generator.BranchIfFalse(hasValueClause); // If the variable does exist, return true. generator.LoadVariable(scopeVariable); generator.CastClass(typeof(DeclarativeScope)); generator.LoadString(this.Name); generator.Call(ReflectionHelpers.Scope_Delete); generator.Branch(endOfDelete); // } generator.DefineLabelPosition(hasValueClause); } } } else { // Check if the property exists by calling scope.ScopeObject.HasProperty(propertyName) generator.LoadVariable(scopeVariable); generator.CastClass(typeof(ObjectScope)); generator.Call(ReflectionHelpers.ObjectScope_ScopeObject); generator.Duplicate(); generator.LoadString(this.Name); generator.Call(ReflectionHelpers.ObjectInstance_HasProperty); // Jump past the delete if the property doesn't exist. var endOfExistsCheck = generator.CreateLabel(); generator.BranchIfFalse(endOfExistsCheck); // Call scope.ScopeObject.Delete(key, false) generator.LoadString(this.Name); generator.LoadBoolean(false); generator.Call(ReflectionHelpers.ObjectInstance_Delete); generator.Branch(endOfDelete); generator.DefineLabelPosition(endOfExistsCheck); generator.Pop(); // If the name is not defined, return true. if (scope.ParentScope == null) { generator.LoadBoolean(true); } } // Try the parent scope. if (scope.ParentScope != null && scope.ExistsAtRuntime == true) { generator.LoadVariable(scopeVariable); generator.Call(ReflectionHelpers.Scope_ParentScope); generator.StoreVariable(scopeVariable); } scope = scope.ParentScope; } while (scope != null); // Release the temporary variable. generator.ReleaseTemporaryVariable(scopeVariable); // Define a label at the end. generator.DefineLabelPosition(endOfDelete); // Delete obviously has side-effects so we evaluate the return value then pop it from // the stack. //if (optimizationInfo.SuppressReturnValue == true) // generator.Pop(); }
/// <summary> /// Generates CIL for the relational operators. /// </summary> /// <param name="generator"> The generator to output the CIL to. </param> /// <param name="optimizationInfo"> Information about any optimizations that should be performed. </param> private void GenerateRelational(ILGenerator generator, OptimizationInfo optimizationInfo) { // Get the statically-determined types of the left and right operands. PrimitiveType leftType = this.Left.ResultType; PrimitiveType rightType = this.Right.ResultType; // The relational operators compare strings if both of the operands are strings. if (leftType == PrimitiveType.String && rightType == PrimitiveType.String) { // Both of the operands are strings. // Load the left hand side operand onto the stack. this.Left.GenerateCode(generator, optimizationInfo); // Load the right hand side operand onto the stack. this.Right.GenerateCode(generator, optimizationInfo); // Compare the two strings. generator.Call(ReflectionHelpers.String_CompareOrdinal); switch (this.OperatorType) { case OperatorType.LessThan: generator.LoadInt32(0); generator.CompareLessThan(); break; case OperatorType.LessThanOrEqual: generator.LoadInt32(1); generator.CompareLessThan(); break; case OperatorType.GreaterThan: generator.LoadInt32(0); generator.CompareGreaterThan(); break; case OperatorType.GreaterThanOrEqual: generator.LoadInt32(-1); generator.CompareGreaterThan(); break; } } else if (leftType == PrimitiveType.Int32 && rightType == PrimitiveType.Int32) { // Both of the operands are integers. // Load the left hand side operand onto the stack. this.Left.GenerateCode(generator, optimizationInfo); // Load the right hand side operand onto the stack. this.Right.GenerateCode(generator, optimizationInfo); // Compare the two numbers. switch (this.OperatorType) { case OperatorType.LessThan: generator.CompareLessThan(); break; case OperatorType.GreaterThan: generator.CompareGreaterThan(); break; case OperatorType.LessThanOrEqual: // a <= b <--> (a > b) == false generator.CompareGreaterThan(); generator.LoadBoolean(false); generator.CompareEqual(); break; case OperatorType.GreaterThanOrEqual: // a >= b <--> (a < b) == false generator.CompareLessThan(); generator.LoadBoolean(false); generator.CompareEqual(); break; } } else if (PrimitiveTypeUtilities.IsNumeric(leftType) || PrimitiveTypeUtilities.IsNumeric(rightType)) { // At least one of the operands is a number. // Load the left hand side operand onto the stack. this.Left.GenerateCode(generator, optimizationInfo); // Convert the operand to a number. EmitConversion.ToNumber(generator, leftType); // Load the right hand side operand onto the stack. this.Right.GenerateCode(generator, optimizationInfo); // Convert the operand to a number. EmitConversion.ToNumber(generator, rightType); // Compare the two numbers. switch (this.OperatorType) { case OperatorType.LessThan: generator.CompareLessThan(); break; case OperatorType.GreaterThan: generator.CompareGreaterThan(); break; case OperatorType.LessThanOrEqual: // a <= b <--> (a > b) == false generator.CompareGreaterThanUnsigned(); generator.LoadBoolean(false); generator.CompareEqual(); break; case OperatorType.GreaterThanOrEqual: // a >= b <--> (a < b) == false generator.CompareLessThanUnsigned(); generator.LoadBoolean(false); generator.CompareEqual(); break; } } else { // It is unknown whether one of the operands is a string. // Load the left hand side operand onto the stack. this.Left.GenerateCode(generator, optimizationInfo); EmitConversion.ToAny(generator, leftType); // Load the right hand side operand onto the stack. this.Right.GenerateCode(generator, optimizationInfo); EmitConversion.ToAny(generator, rightType); switch (this.OperatorType) { case OperatorType.LessThan: generator.Call(ReflectionHelpers.TypeComparer_LessThan); break; case OperatorType.LessThanOrEqual: generator.Call(ReflectionHelpers.TypeComparer_LessThanOrEqual); break; case OperatorType.GreaterThan: generator.Call(ReflectionHelpers.TypeComparer_GreaterThan); break; case OperatorType.GreaterThanOrEqual: generator.Call(ReflectionHelpers.TypeComparer_GreaterThanOrEqual); break; } } }
/// <summary> /// Generates code that initializes the variable and function declarations. /// </summary> /// <param name="generator"> The generator to output the CIL to. </param> /// <param name="optimizationInfo"> Information about any optimizations that should be performed. </param> internal virtual void GenerateDeclarations(ILGenerator generator, OptimizationInfo optimizationInfo) { // Initialize the declared variables and functions. foreach (var variable in this.variables.Values) { // When a scope is reused, i.e. with an eval(), do not reinitialize the variables. if (variable.Initialized == true) continue; if (variable.ValueAtTopOfScope != null) { // Emit the initialization code. if (this is ObjectScope) { // Determine the property attributes. var attributes = Library.PropertyAttributes.Enumerable; if (variable.Writable == true) attributes |= Library.PropertyAttributes.Writable; if (variable.Deletable == true) attributes |= Library.PropertyAttributes.Configurable; // bool DefineProperty(string propertyName, PropertyDescriptor descriptor, bool throwOnError) EmitHelpers.LoadScope(generator); generator.CastClass(typeof(ObjectScope)); generator.Call(ReflectionHelpers.ObjectScope_ScopeObject); generator.LoadString(variable.Name); variable.ValueAtTopOfScope.GenerateCode(generator, optimizationInfo); EmitConversion.Convert(generator, variable.ValueAtTopOfScope.ResultType, PrimitiveType.Any, optimizationInfo); generator.LoadInt32((int)attributes); generator.NewObject(ReflectionHelpers.PropertyDescriptor_Constructor2); generator.LoadBoolean(false); generator.Call(ReflectionHelpers.ObjectInstance_DefineProperty); generator.Pop(); } else { variable.ValueAtTopOfScope.GenerateCode(generator, optimizationInfo); var name = new NameExpression(this, variable.Name); name.GenerateSet(generator, optimizationInfo, variable.ValueAtTopOfScope.ResultType, false); } // Mark the variable as having been initialized. variable.Initialized = true; } } }
/// <summary> /// Stores the value on the top of the stack in the reference. /// </summary> /// <param name="generator"> The generator to output the CIL to. </param> /// <param name="optimizationInfo"> Information about any optimizations that should be performed. </param> /// <param name="valueType"> The primitive type of the value that is on the top of the stack. </param> /// <param name="throwIfUnresolvable"> <c>true</c> to throw a ReferenceError exception if /// the name is unresolvable; <c>false</c> to create a new property instead. </param> public void GenerateSet(ILGenerator generator, OptimizationInfo optimizationInfo, PrimitiveType valueType, bool throwIfUnresolvable) { string propertyName = null; bool isArrayIndex = false; //optimizationInfo = optimizationInfo.RemoveFlags(OptimizationFlags.SuppressReturnValue); // Right-hand-side can be a property name (a.b) if (this.OperatorType == OperatorType.MemberAccess) { var rhs = this.GetOperand(1) as NameExpression; if (rhs == null) { throw new JavaScriptException(optimizationInfo.Engine, "SyntaxError", "Invalid member access", optimizationInfo.SourceSpan.StartLine, optimizationInfo.Source.Path, optimizationInfo.FunctionName); } propertyName = rhs.Name; } // Or a constant indexer (a['b']) if (this.OperatorType == OperatorType.Index) { var rhs = this.GetOperand(1) as LiteralExpression; if (rhs != null) { propertyName = TypeConverter.ToString(rhs.Value); // Or a array index (a[0]) if (rhs.ResultType == PrimitiveType.Int32 || (propertyName != null && Library.ArrayInstance.ParseArrayIndex(propertyName) != uint.MaxValue)) { isArrayIndex = true; } } } // Convert the value to an object and store it in a temporary variable. var value = generator.CreateTemporaryVariable(typeof(object)); EmitConversion.ToAny(generator, valueType); generator.StoreVariable(value); if (isArrayIndex == true) { // Array indexer // ------------- // xxx = object[index] // Load the left-hand side and convert to an object instance. var lhs = this.GetOperand(0); lhs.GenerateCode(generator, optimizationInfo); EmitConversion.ToObject(generator, lhs.ResultType, optimizationInfo); // Load the right-hand side and convert to a uint32. var rhs = this.GetOperand(1); rhs.GenerateCode(generator, optimizationInfo); EmitConversion.ToUInt32(generator, rhs.ResultType); // Call the indexer. generator.LoadVariable(value); generator.LoadBoolean(optimizationInfo.StrictMode); generator.Call(ReflectionHelpers.ObjectInstance_SetPropertyValue_Int); } else if (propertyName != null) { //// Load the left-hand side and convert to an object instance. //var lhs = this.GetOperand(0); //lhs.GenerateCode(generator, optimizationInfo); //EmitConversion.ToObject(generator, lhs.ResultType); //// Call the indexer. //generator.LoadString(propertyName); //generator.LoadVariable(value); //generator.LoadBoolean(optimizationInfo.StrictMode); //generator.Call(ReflectionHelpers.ObjectInstance_SetPropertyValue_String); // Named property modification (e.g. x.property = y) // ------------------------------------------------- // __object_cacheKey = null; // __object_property_cachedIndex = 0; // ... // if (__object_cacheKey != object.InlineCacheKey) // object.InlineSetPropertyValue("property", value, strictMode, out __object_property_cachedIndex, out __object_cacheKey) // else // object.InlinePropertyValues[__object_property_cachedIndex] = value; // Load the left-hand side and convert to an object instance. var lhs = this.GetOperand(0); lhs.GenerateCode(generator, optimizationInfo); EmitConversion.ToObject(generator, lhs.ResultType, optimizationInfo); // TODO: share these variables somehow. var cacheKey = generator.DeclareVariable(typeof(object)); var cachedIndex = generator.DeclareVariable(typeof(int)); // Store the object into a temp variable. var objectInstance = generator.DeclareVariable(PrimitiveType.Object); generator.StoreVariable(objectInstance); // if (__object_cacheKey != object.InlineCacheKey) generator.LoadVariable(cacheKey); generator.LoadVariable(objectInstance); generator.Call(ReflectionHelpers.ObjectInstance_InlineCacheKey); var elseClause = generator.CreateLabel(); generator.BranchIfEqual(elseClause); // xxx = object.InlineSetPropertyValue("property", value, strictMode, out __object_property_cachedIndex, out __object_cacheKey) generator.LoadVariable(objectInstance); generator.LoadString(propertyName); generator.LoadVariable(value); generator.LoadBoolean(optimizationInfo.StrictMode); generator.LoadAddressOfVariable(cachedIndex); generator.LoadAddressOfVariable(cacheKey); generator.Call(ReflectionHelpers.ObjectInstance_InlineSetPropertyValue); var endOfIf = generator.CreateLabel(); generator.Branch(endOfIf); // else generator.DefineLabelPosition(elseClause); // object.InlinePropertyValues[__object_property_cachedIndex] = value; generator.LoadVariable(objectInstance); generator.Call(ReflectionHelpers.ObjectInstance_InlinePropertyValues); generator.LoadVariable(cachedIndex); generator.LoadVariable(value); generator.StoreArrayElement(typeof(object)); // End of the if statement generator.DefineLabelPosition(endOfIf); } else { // Dynamic property access // ----------------------- // xxx = object.Get(x) // Load the left-hand side and convert to an object instance. var lhs = this.GetOperand(0); lhs.GenerateCode(generator, optimizationInfo); EmitConversion.ToObject(generator, lhs.ResultType, optimizationInfo); // Load the property name and convert to a string. var rhs = this.GetOperand(1); rhs.GenerateCode(generator, optimizationInfo); EmitConversion.ToString(generator, rhs.ResultType); // Call the indexer. generator.LoadVariable(value); generator.LoadBoolean(optimizationInfo.StrictMode); generator.Call(ReflectionHelpers.ObjectInstance_SetPropertyValue_String); } // The temporary variable is no longer needed. generator.ReleaseTemporaryVariable(value); }
/// <summary> /// Generates CIL to set the display name of the function. The function should be on top of the stack. /// </summary> /// <param name="generator"> The generator to output the CIL to. </param> /// <param name="optimizationInfo"> Information about any optimizations that should be performed. </param> /// <param name="displayName"> The display name of the function. </param> /// <param name="force"> <c>true</c> to set the displayName property, even if the function has a name already. </param> public void GenerateDisplayName(ILGenerator generator, OptimizationInfo optimizationInfo, string displayName, bool force) { if (displayName == null) throw new ArgumentNullException("displayName"); // We only infer names for functions if the function doesn't have a name. if (force == true || string.IsNullOrEmpty(this.FunctionName)) { // Statically set the display name. this.context.DisplayName = displayName; // Generate code to set the display name at runtime. generator.Duplicate(); generator.LoadString("displayName"); generator.LoadString(displayName); generator.LoadBoolean(false); generator.Call(ReflectionHelpers.ObjectInstance_SetPropertyValue_String); } }
/// <summary> /// Generates CIL for the relational operators. /// </summary> /// <param name="generator"> The generator to output the CIL to. </param> /// <param name="optimizationInfo"> Information about any optimizations that should be performed. </param> private void GenerateRelational(ILGenerator generator, OptimizationInfo optimizationInfo) { // Get the statically-determined types of the left and right operands. PrimitiveType leftType = this.Left.ResultType; PrimitiveType rightType = this.Right.ResultType; // The relational operators compare strings if both of the operands are strings. if (leftType == PrimitiveType.String && rightType == PrimitiveType.String) { // Both of the operands are strings. // Load the left hand side operand onto the stack. this.Left.GenerateCode(generator, optimizationInfo); // Load the right hand side operand onto the stack. this.Right.GenerateCode(generator, optimizationInfo); // Compare the two strings. generator.Call(ReflectionHelpers.String_CompareOrdinal); switch (this.OperatorType) { case OperatorType.LessThan: generator.LoadInt32(0); generator.CompareLessThan(); break; case OperatorType.LessThanOrEqual: generator.LoadInt32(1); generator.CompareLessThan(); break; case OperatorType.GreaterThan: generator.LoadInt32(0); generator.CompareGreaterThan(); break; case OperatorType.GreaterThanOrEqual: generator.LoadInt32(-1); generator.CompareGreaterThan(); break; } } else if (leftType == PrimitiveType.Int32 && rightType == PrimitiveType.Int32) { // Both of the operands are integers. // Load the left hand side operand onto the stack. this.Left.GenerateCode(generator, optimizationInfo); // Load the right hand side operand onto the stack. this.Right.GenerateCode(generator, optimizationInfo); // Compare the two numbers. switch (this.OperatorType) { case OperatorType.LessThan: generator.CompareLessThan(); break; case OperatorType.GreaterThan: generator.CompareGreaterThan(); break; case OperatorType.LessThanOrEqual: // a <= b <--> (a > b) == false generator.CompareGreaterThan(); generator.LoadBoolean(false); generator.CompareEqual(); break; case OperatorType.GreaterThanOrEqual: // a >= b <--> (a < b) == false generator.CompareLessThan(); generator.LoadBoolean(false); generator.CompareEqual(); break; } } else if (PrimitiveTypeUtilities.IsNumeric(leftType) || PrimitiveTypeUtilities.IsNumeric(rightType)) { // At least one of the operands is a number. // Load the left hand side operand onto the stack. this.Left.GenerateCode(generator, optimizationInfo); // Convert the operand to a number. EmitConversion.ToNumber(generator, leftType); // Load the right hand side operand onto the stack. this.Right.GenerateCode(generator, optimizationInfo); // Convert the operand to a number. EmitConversion.ToNumber(generator, rightType); // Compare the two numbers. switch (this.OperatorType) { case OperatorType.LessThan: generator.CompareLessThan(); break; case OperatorType.GreaterThan: generator.CompareGreaterThan(); break; case OperatorType.LessThanOrEqual: // a <= b <--> (a > b) == false generator.CompareGreaterThanUnsigned(); generator.LoadBoolean(false); generator.CompareEqual(); break; case OperatorType.GreaterThanOrEqual: // a >= b <--> (a < b) == false generator.CompareLessThanUnsigned(); generator.LoadBoolean(false); generator.CompareEqual(); break; } } else { // It is unknown whether one of the operands is a string. // Load the left hand side operand onto the stack. this.Left.GenerateCode(generator, optimizationInfo); EmitConversion.ToAny(generator, leftType); // Load the right hand side operand onto the stack. this.Right.GenerateCode(generator, optimizationInfo); EmitConversion.ToAny(generator, rightType); switch (this.OperatorType) { case OperatorType.LessThan: generator.Call(ReflectionHelpers.TypeComparer_LessThan); break; case OperatorType.LessThanOrEqual: generator.Call(ReflectionHelpers.TypeComparer_LessThanOrEqual); break; case OperatorType.GreaterThan: generator.Call(ReflectionHelpers.TypeComparer_GreaterThan); break; case OperatorType.GreaterThanOrEqual: generator.Call(ReflectionHelpers.TypeComparer_GreaterThanOrEqual); break; } } }
/// <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) { // If a return value is not expected, generate only the side-effects. /*if (optimizationInfo.SuppressReturnValue == true) { this.GenerateSideEffects(generator, optimizationInfo); return; }*/ // Special case the addition operator. if (this.OperatorType == OperatorType.Add) { GenerateAdd(generator, optimizationInfo); return; } // Special case the instanceof operator. if (this.OperatorType == OperatorType.InstanceOf) { GenerateInstanceOf(generator, optimizationInfo); return; } // Special case the in operator. if (this.OperatorType == OperatorType.In) { GenerateIn(generator, optimizationInfo); return; } // Special case the relational operators. if (this.OperatorType == OperatorType.LessThan || this.OperatorType == OperatorType.LessThanOrEqual || this.OperatorType == OperatorType.GreaterThan || this.OperatorType == OperatorType.GreaterThanOrEqual) { GenerateRelational(generator, optimizationInfo); return; } // Special case the logical operators. if (this.OperatorType == OperatorType.LogicalAnd || this.OperatorType == OperatorType.LogicalOr) { GenerateLogical(generator, optimizationInfo); return; } // Load the left hand side onto the stack. this.Left.GenerateCode(generator, optimizationInfo); // Convert the left argument. switch (this.OperatorType) { // Arithmetic operations. case OperatorType.Subtract: case OperatorType.Multiply: case OperatorType.Divide: case OperatorType.Modulo: EmitConversion.ToNumber(generator, this.Left.ResultType); break; // Bitwise operations. case OperatorType.BitwiseAnd: case OperatorType.BitwiseOr: case OperatorType.BitwiseXor: case OperatorType.LeftShift: case OperatorType.SignedRightShift: case OperatorType.UnsignedRightShift: EmitConversion.ToInt32(generator, this.Left.ResultType); break; // Equality operations. case OperatorType.Equal: case OperatorType.StrictlyEqual: case OperatorType.NotEqual: case OperatorType.StrictlyNotEqual: EmitConversion.ToAny(generator, this.Left.ResultType); break; } // Load the right hand side onto the stack. this.Right.GenerateCode(generator, optimizationInfo); // Convert the right argument. switch (this.OperatorType) { // Arithmetic operations. case OperatorType.Subtract: case OperatorType.Multiply: case OperatorType.Divide: case OperatorType.Modulo: EmitConversion.ToNumber(generator, this.Right.ResultType); break; // Bitwise operations. case OperatorType.BitwiseAnd: case OperatorType.BitwiseOr: case OperatorType.BitwiseXor: EmitConversion.ToInt32(generator, this.Right.ResultType); break; case OperatorType.LeftShift: case OperatorType.SignedRightShift: case OperatorType.UnsignedRightShift: EmitConversion.ToUInt32(generator, this.Right.ResultType); generator.LoadInt32(0x1F); generator.BitwiseAnd(); break; // Equality operations. case OperatorType.Equal: case OperatorType.StrictlyEqual: case OperatorType.NotEqual: case OperatorType.StrictlyNotEqual: EmitConversion.ToAny(generator, this.Right.ResultType); break; } // Apply the operator. switch (this.OperatorType) { // Arithmetic operations. case OperatorType.Subtract: generator.Subtract(); break; case OperatorType.Multiply: generator.Multiply(); break; case OperatorType.Divide: generator.Divide(); break; case OperatorType.Modulo: generator.Remainder(); break; // Bitwise operations. case OperatorType.BitwiseAnd: generator.BitwiseAnd(); break; case OperatorType.BitwiseOr: generator.BitwiseOr(); break; case OperatorType.BitwiseXor: generator.BitwiseXor(); break; // Shift operations. case OperatorType.LeftShift: generator.ShiftLeft(); break; case OperatorType.SignedRightShift: generator.ShiftRight(); break; case OperatorType.UnsignedRightShift: generator.ShiftRightUnsigned(); EmitConversion.ToNumber(generator, PrimitiveType.UInt32); break; // Equality operations. case OperatorType.Equal: generator.Call(ReflectionHelpers.TypeComparer_Equals); break; case OperatorType.StrictlyEqual: generator.Call(ReflectionHelpers.TypeComparer_StrictEquals); break; case OperatorType.NotEqual: generator.Call(ReflectionHelpers.TypeComparer_Equals); generator.LoadBoolean(false); generator.CompareEqual(); break; case OperatorType.StrictlyNotEqual: generator.Call(ReflectionHelpers.TypeComparer_StrictEquals); generator.LoadBoolean(false); generator.CompareEqual(); break; default: throw new NotImplementedException(string.Format("Unsupported operator {0}", this.OperatorType)); } }
/// <summary> /// Generates an array containing the argument values for a tagged template literal. /// </summary> /// <param name="generator"> The generator to output the CIL to. </param> /// <param name="optimizationInfo"> Information about any optimizations that should be performed. </param> /// <param name="templateLiteral"> The template literal expression containing the parameter /// values. </param> internal void GenerateTemplateArgumentsArray(ILGenerator generator, OptimizationInfo optimizationInfo, TemplateLiteralExpression templateLiteral) { // Generate an array containing the value of each argument. generator.LoadInt32(templateLiteral.Values.Count + 1); generator.NewArray(typeof(object)); // Load the first parameter. generator.Duplicate(); generator.LoadInt32(0); // The first parameter to the tag function is an array of strings. var stringsExpression = new List<Expression>(templateLiteral.Strings.Count); foreach (var templateString in templateLiteral.Strings) { stringsExpression.Add(new LiteralExpression(templateString)); } new LiteralExpression(stringsExpression).GenerateCode(generator, optimizationInfo); generator.Duplicate(); // Now we need the name of the property. generator.LoadString("raw"); // Now generate an array of raw strings. var rawStringsExpression = new List<Expression>(templateLiteral.RawStrings.Count); foreach (var rawString in templateLiteral.RawStrings) { rawStringsExpression.Add(new LiteralExpression(rawString)); } new LiteralExpression(rawStringsExpression).GenerateCode(generator, optimizationInfo); // Freeze array by calling ObjectInstance Freeze(ObjectInstance). generator.CallStatic(ReflectionHelpers.ObjectConstructor_Freeze); // Now store the raw strings as a property of the base strings array. generator.LoadBoolean(optimizationInfo.StrictMode); generator.Call(ReflectionHelpers.ObjectInstance_SetPropertyValue_Object); // Freeze array by calling ObjectInstance Freeze(ObjectInstance). generator.CallStatic(ReflectionHelpers.ObjectConstructor_Freeze); // Store in the array. generator.StoreArrayElement(typeof(object)); // Values are passed as subsequent parameters. for (int i = 0; i < templateLiteral.Values.Count; i++) { generator.Duplicate(); generator.LoadInt32(i + 1); templateLiteral.Values[i].GenerateCode(generator, optimizationInfo); EmitConversion.ToAny(generator, templateLiteral.Values[i].ResultType); generator.StoreArrayElement(typeof(object)); } }
/// <summary> /// Stores the value on the top of the stack in the reference. /// </summary> /// <param name="generator"> The generator to output the CIL to. </param> /// <param name="optimizationInfo"> Information about any optimizations that should be performed. </param> /// <param name="valueType"> The primitive type of the value that is on the top of the stack. </param> /// <param name="throwIfUnresolvable"> <c>true</c> to throw a ReferenceError exception if /// the name is unresolvable; <c>false</c> to create a new property instead. </param> public void GenerateSet(ILGenerator generator, OptimizationInfo optimizationInfo, PrimitiveType valueType, bool throwIfUnresolvable) { // The value is initially on the top of the stack but is stored in this variable // at the last possible moment. ILLocalVariable value = null; var scope = this.Scope; ILLocalVariable scopeVariable = null; var endOfSet = generator.CreateLabel(); do { if (scope is DeclarativeScope) { // Get information about the variable. var variable = scope.GetDeclaredVariable(this.Name); if (variable != null) { // The variable was declared in this scope. if (scope.ExistsAtRuntime == false) { // The scope has been optimized away. The value of the variable is stored // in an ILVariable. // Declare an IL local variable if no storage location has been allocated yet. if (variable.Store == null) { variable.Store = generator.DeclareVariable(typeof(object), variable.Name); } if (value == null) { // The value to store is on the top of the stack - convert it to the // storage type of the variable. EmitConversion.Convert(generator, valueType, variable.Type, optimizationInfo); } else { // The value to store is in a temporary variable. generator.LoadVariable(value); EmitConversion.Convert(generator, PrimitiveType.Any, variable.Type, optimizationInfo); } // Store the value in the variable. generator.StoreVariable(variable.Store); } else if (variable.Writable == true) { if (value == null) { // The value to store is on the top of the stack - convert it to an // object and store it in a temporary variable. EmitConversion.Convert(generator, valueType, PrimitiveType.Any, optimizationInfo); value = generator.CreateTemporaryVariable(typeof(object)); generator.StoreVariable(value); } // scope.Values[index] = value if (scopeVariable == null) { EmitHelpers.LoadScope(generator); } else { generator.LoadVariable(scopeVariable); } generator.CastClass(typeof(DeclarativeScope)); generator.Call(ReflectionHelpers.DeclarativeScope_Values); generator.LoadInt32(variable.Index); generator.LoadVariable(value); generator.StoreArrayElement(typeof(object)); } else { // The variable exists, but is read-only. // Pop the value off the stack (if it is still there). if (value == null) { generator.Pop(); } } // The variable was found - no need to search any more parent scopes. break; } else { // The variable was not defined at compile time, but may have been // introduced by an eval() statement. if (optimizationInfo.MethodOptimizationHints.HasEval == true) { if (value == null) { // The value to store is on the top of the stack - convert it to an // object and store it in a temporary variable. EmitConversion.Convert(generator, valueType, PrimitiveType.Any, optimizationInfo); value = generator.CreateTemporaryVariable(typeof(object)); generator.StoreVariable(value); } // Check the variable exists: if (scope.HasValue(variableName) == true) { if (scopeVariable == null) { EmitHelpers.LoadScope(generator); } else { generator.LoadVariable(scopeVariable); } generator.CastClass(typeof(DeclarativeScope)); generator.LoadString(this.Name); generator.Call(ReflectionHelpers.Scope_HasValue); var hasValueClause = generator.CreateLabel(); generator.BranchIfFalse(hasValueClause); // Set the value of the variable. if (scopeVariable == null) { EmitHelpers.LoadScope(generator); } else { generator.LoadVariable(scopeVariable); } generator.CastClass(typeof(DeclarativeScope)); generator.LoadString(this.Name); generator.LoadVariable(value); generator.Call(ReflectionHelpers.Scope_SetValue); generator.Branch(endOfSet); // } generator.DefineLabelPosition(hasValueClause); } } } else { if (value == null) { // The value to store is on the top of the stack - convert it to an // object and store it in a temporary variable. EmitConversion.Convert(generator, valueType, PrimitiveType.Any, optimizationInfo); value = generator.CreateTemporaryVariable(typeof(object)); generator.StoreVariable(value); } if (scopeVariable == null) { EmitHelpers.LoadScope(generator); } else { generator.LoadVariable(scopeVariable); } generator.CastClass(typeof(ObjectScope)); generator.Call(ReflectionHelpers.ObjectScope_ScopeObject); if (scope.ParentScope == null && throwIfUnresolvable == false) { // Sets the value of a global variable. // JS: object.property = value // C# ==> // if (propertyName == null) // propertyName = new PropertyName("property"); // object.SetPropertyValue(propertyName, value, strictMode); ILLocalVariable propertyName = optimizationInfo.GetGlobalPropertyReferenceVariable(generator, this.Name); generator.LoadVariable(propertyName); generator.Duplicate(); var afterIf = generator.CreateLabel(); generator.BranchIfNotNull(afterIf); generator.Pop(); generator.LoadString(this.Name); generator.NewObject(ReflectionHelpers.PropertyName_Constructor); generator.Duplicate(); generator.StoreVariable(propertyName); generator.DefineLabelPosition(afterIf); generator.LoadVariable(value); generator.LoadBoolean(optimizationInfo.StrictMode); generator.Call(ReflectionHelpers.ObjectInstance_SetPropertyValue_PropertyReference); } else { // Setting a variable within a "with" scope. generator.LoadString(this.Name); generator.LoadVariable(value); generator.LoadBoolean(optimizationInfo.StrictMode); // Set the property value if the property exists. generator.Call(ReflectionHelpers.ObjectInstance_SetPropertyValueIfExists); // The return value is true if the property was defined, and false if it wasn't. generator.BranchIfTrue(endOfSet); } } // Try the parent scope. if (scope.ParentScope != null && scope.ExistsAtRuntime == true) { if (scopeVariable == null) { scopeVariable = generator.CreateTemporaryVariable(typeof(Scope)); EmitHelpers.LoadScope(generator); } else { generator.LoadVariable(scopeVariable); } generator.Call(ReflectionHelpers.Scope_ParentScope); generator.StoreVariable(scopeVariable); } scope = scope.ParentScope; } while (scope != null); // The value might be still on top of the stack. if (value == null && scope == null) { generator.Pop(); } // Throw an error if the name does not exist and throwIfUnresolvable is true. if (scope == null && throwIfUnresolvable == true) { EmitHelpers.EmitThrow(generator, ErrorType.ReferenceError, this.Name + " is not defined", optimizationInfo); } // Release the temporary variables. if (value != null) { generator.ReleaseTemporaryVariable(value); } if (scopeVariable != null) { generator.ReleaseTemporaryVariable(scopeVariable); } // Define a label at the end. generator.DefineLabelPosition(endOfSet); }
/// <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) { // Special-case the delete operator. if (this.OperatorType == OperatorType.Delete) { GenerateDelete(generator, optimizationInfo); return; } // If a return value is not expected, generate only the side-effects. /*if (optimizationInfo.SuppressReturnValue == true) * { * this.GenerateSideEffects(generator, optimizationInfo); * return; * }*/ // Special-case the typeof operator. if (this.OperatorType == OperatorType.Typeof) { GenerateTypeof(generator, optimizationInfo); return; } // Load the operand onto the stack. this.Operand.GenerateCode(generator, optimizationInfo); // Convert the operand to the correct type. switch (this.OperatorType) { case OperatorType.Plus: case OperatorType.Minus: EmitConversion.ToNumber(generator, this.Operand.ResultType); break; case OperatorType.BitwiseNot: EmitConversion.ToInt32(generator, this.Operand.ResultType); break; case OperatorType.LogicalNot: EmitConversion.ToBool(generator, this.Operand.ResultType); break; } // Apply the operator. switch (this.OperatorType) { case OperatorType.Plus: break; case OperatorType.Minus: generator.Negate(); break; case OperatorType.BitwiseNot: generator.BitwiseNot(); break; case OperatorType.LogicalNot: generator.LoadBoolean(false); generator.CompareEqual(); break; case OperatorType.Void: generator.Pop(); EmitHelpers.EmitUndefined(generator); break; default: throw new NotImplementedException(string.Format("Unsupported operator {0}", this.OperatorType)); } }
/// <summary> /// Generates CIL for a call to eval(). /// </summary> /// <param name="generator"> The generator to output the CIL to. </param> /// <param name="optimizationInfo"> Information about any optimizations that should be performed. </param> private void GenerateEval(ILGenerator generator, OptimizationInfo optimizationInfo) { // engine EmitHelpers.LoadScriptEngine(generator); // code if (this.OperandCount < 2) { // No arguments were supplied. generator.LoadNull(); } else { // Take the first argument and convert it to a string. GenerateArgumentsArray(generator, optimizationInfo); generator.LoadInt32(0); generator.LoadArrayElement(typeof(object)); } // scope EmitHelpers.LoadScope(generator); // thisObject EmitHelpers.LoadThis(generator); // strictMode generator.LoadBoolean(optimizationInfo.StrictMode); // Call Global.Eval(engine, code, scope, thisValue, strictMode) generator.Call(ReflectionHelpers.Global_Eval); }
/// <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) { // Literals cannot have side-effects so if a return value is not expected then generate // nothing. //if (optimizationInfo.SuppressReturnValue == true) // return; if (this.Value is int) generator.LoadInt32((int)this.Value); else if (this.Value is double) generator.LoadDouble((double)this.Value); else if (this.Value is string) generator.LoadString((string)this.Value); else if (this.Value is bool) generator.LoadBoolean((bool)this.Value); else if (this.Value is RegularExpressionLiteral) { // RegExp var sharedRegExpVariable = optimizationInfo.GetRegExpVariable(generator, (RegularExpressionLiteral)this.Value); var label1 = generator.CreateLabel(); var label2 = generator.CreateLabel(); // if (sharedRegExp == null) { generator.LoadVariable(sharedRegExpVariable); generator.LoadNull(); generator.BranchIfNotEqual(label1); // sharedRegExp = Global.RegExp.Construct(source, flags) EmitHelpers.LoadScriptEngine(generator); generator.Call(ReflectionHelpers.ScriptEngine_RegExp); generator.LoadString(((RegularExpressionLiteral)this.Value).Pattern); generator.LoadString(((RegularExpressionLiteral)this.Value).Flags); generator.Call(ReflectionHelpers.RegExp_Construct); generator.Duplicate(); generator.StoreVariable(sharedRegExpVariable); // } else { generator.Branch(label2); generator.DefineLabelPosition(label1); // Global.RegExp.Construct(sharedRegExp, flags) EmitHelpers.LoadScriptEngine(generator); generator.Call(ReflectionHelpers.ScriptEngine_RegExp); generator.LoadVariable(sharedRegExpVariable); generator.LoadNull(); generator.Call(ReflectionHelpers.RegExp_Construct); // } generator.DefineLabelPosition(label2); } else if (this.Value == Null.Value) { // Null. EmitHelpers.EmitNull(generator); } else if (this.Value == Undefined.Value) { // Undefined. EmitHelpers.EmitUndefined(generator); } else if (this.Value is List<Expression>) { // Construct an array literal. var arrayLiteral = (List<Expression>)this.Value; // Operands for ArrayConstructor.New() are: an ArrayConstructor instance (ArrayConstructor), an array (object[]) // ArrayConstructor EmitHelpers.LoadScriptEngine(generator); generator.Call(ReflectionHelpers.ScriptEngine_Array); // object[] generator.LoadInt32(arrayLiteral.Count); generator.NewArray(typeof(object)); for (int i = 0; i < arrayLiteral.Count; i ++) { // Operands for StoreArrayElement() are: an array (object[]), index (int), value (object). // Array generator.Duplicate(); // Index generator.LoadInt32(i); // Value var elementExpression = arrayLiteral[i]; if (elementExpression == null) generator.LoadNull(); else { elementExpression.GenerateCode(generator, optimizationInfo); EmitConversion.ToAny(generator, elementExpression.ResultType); } // Store the element value. generator.StoreArrayElement(typeof(object)); } // ArrayConstructor.New(object[]) generator.Call(ReflectionHelpers.Array_New); } else if (this.Value is Dictionary<string, object>) { // This is an object literal. var properties = (Dictionary<string, object>)this.Value; // Create a new object. EmitHelpers.LoadScriptEngine(generator); generator.Call(ReflectionHelpers.ScriptEngine_Object); generator.Call(ReflectionHelpers.Object_Construct); foreach (var keyValuePair in properties) { string propertyName = keyValuePair.Key; object propertyValue = keyValuePair.Value; generator.Duplicate(); generator.LoadString(propertyName); if (propertyValue is Expression) { // Add a new property to the object. var dataPropertyValue = (Expression)propertyValue; dataPropertyValue.GenerateCode(generator, optimizationInfo); // Support the inferred function displayName property. if (dataPropertyValue is FunctionExpression) ((FunctionExpression)dataPropertyValue).GenerateDisplayName(generator, optimizationInfo, propertyName, false); EmitConversion.ToAny(generator, dataPropertyValue.ResultType); generator.LoadBoolean(optimizationInfo.StrictMode); generator.Call(ReflectionHelpers.ObjectInstance_SetPropertyValue_String); } else if (propertyValue is Parser.ObjectLiteralAccessor) { // Add a new getter/setter to the object. var accessorValue = (Parser.ObjectLiteralAccessor)propertyValue; if (accessorValue.Getter != null) { accessorValue.Getter.GenerateCode(generator, optimizationInfo); // Support the inferred function displayName property. accessorValue.Getter.GenerateDisplayName(generator, optimizationInfo, "get " + propertyName, true); EmitConversion.ToAny(generator, accessorValue.Getter.ResultType); } else generator.LoadNull(); if (accessorValue.Setter != null) { accessorValue.Setter.GenerateCode(generator, optimizationInfo); // Support the inferred function displayName property. accessorValue.Setter.GenerateDisplayName(generator, optimizationInfo, "set " + propertyName, true); EmitConversion.ToAny(generator, accessorValue.Setter.ResultType); } else generator.LoadNull(); generator.LoadInt32((int)Library.PropertyAttributes.FullAccess); generator.NewObject(ReflectionHelpers.PropertyDescriptor_Constructor3); generator.LoadBoolean(false); generator.Call(ReflectionHelpers.ObjectInstance_DefineProperty); generator.Pop(); } else throw new InvalidOperationException("Invalid property value type in object literal."); } } else throw new NotImplementedException("Unknown literal type."); }
/// <summary> /// Stores the value on the top of the stack in the reference. /// </summary> /// <param name="generator"> The generator to output the CIL to. </param> /// <param name="optimizationInfo"> Information about any optimizations that should be performed. </param> /// <param name="valueType"> The primitive type of the value that is on the top of the stack. </param> public void GenerateSet(ILGenerator generator, OptimizationInfo optimizationInfo, PrimitiveType valueType) { string propertyName = null; TypeOfMemberAccess memberAccessType = DetermineTypeOfMemberAccess(optimizationInfo, out propertyName); if (memberAccessType == TypeOfMemberAccess.ArrayIndex) { // Array indexer // ------------- // xxx = object[index] // Call the indexer. EmitConversion.ToAny(generator, valueType); generator.LoadBoolean(optimizationInfo.StrictMode); generator.Call(ReflectionHelpers.ObjectInstance_SetPropertyValue_Int); generator.Pop(); } else if (memberAccessType == TypeOfMemberAccess.Static) { // Named property modification (e.g. object.property = value) // ---------------------------------------------------------- // object.SetPropertyValue(property, value, strictMode) // Convert the value to an object and store it in a temporary variable. var value = generator.CreateTemporaryVariable(typeof(object)); EmitConversion.ToAny(generator, valueType); generator.StoreVariable(value); // Use a PropertyReference to speed up access if we are inside a loop. if (optimizationInfo.InsideLoop) { ILLocalVariable propertyReference = optimizationInfo.GetPropertyReferenceVariable(generator, propertyName); generator.LoadVariable(propertyReference); generator.Duplicate(); var afterIf = generator.CreateLabel(); generator.BranchIfNotNull(afterIf); generator.Pop(); generator.LoadString(propertyName); generator.NewObject(ReflectionHelpers.PropertyName_Constructor); generator.Duplicate(); generator.StoreVariable(propertyReference); generator.DefineLabelPosition(afterIf); generator.LoadVariable(value); generator.LoadBoolean(optimizationInfo.StrictMode); generator.Call(ReflectionHelpers.ObjectInstance_SetPropertyValue_PropertyReference); generator.Pop(); } else { generator.LoadString(propertyName); generator.LoadVariable(value); generator.LoadBoolean(optimizationInfo.StrictMode); generator.Call(ReflectionHelpers.ObjectInstance_SetPropertyValue_Object); generator.Pop(); } generator.ReleaseTemporaryVariable(value); } else { // Dynamic property access // ----------------------- // object.SetPropertyValue(property, value, strictMode) EmitConversion.ToAny(generator, valueType); generator.LoadBoolean(optimizationInfo.StrictMode); generator.Call(ReflectionHelpers.ObjectInstance_SetPropertyValue_Object); generator.Pop(); } }
/// <summary> /// Generates CIL for the delete 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> private void GenerateDelete(ILGenerator generator, OptimizationInfo optimizationInfo) { // Attempting to delete something that isn't a reference returns true but otherwise does nothing. if ((this.Operand is IReferenceExpression) == false) { // Make sure the expression is evaluated. this.Operand.GenerateCode(generator, optimizationInfo); // Discard the result and return true. generator.Pop(); generator.LoadBoolean(true); return; } // The operand is a variable or property reference. ((IReferenceExpression)this.Operand).GenerateDelete(generator, optimizationInfo); }
/// <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) { // Generate a new method. this.context.GenerateCode(); // Add the generated method to the nested function list. if (optimizationInfo.NestedFunctions == null) { optimizationInfo.NestedFunctions = new List <GeneratedMethod>(); } optimizationInfo.NestedFunctions.Add(this.context.GeneratedMethod); // Add all the nested methods to the parent list. if (this.context.GeneratedMethod.Dependencies != null) { foreach (var nestedFunctionExpression in this.context.GeneratedMethod.Dependencies) { optimizationInfo.NestedFunctions.Add(nestedFunctionExpression); } } // Store the generated method in the cache. long generatedMethodID = GeneratedMethod.Save(this.context.GeneratedMethod); // Create a UserDefinedFunction. // prototype EmitHelpers.LoadScriptEngine(generator); generator.Call(ReflectionHelpers.ScriptEngine_Function); generator.Call(ReflectionHelpers.FunctionInstance_InstancePrototype); // name string prefix = null; if (Name.IsGetter) { prefix = "get "; } else if (Name.IsSetter) { prefix = "set "; } if (Name.HasStaticName) { generator.LoadString(prefix + Name.StaticName); } else { // Compute the name at runtime. if (prefix != null) { generator.LoadString(prefix); } Name.ComputedName.GenerateCode(generator, optimizationInfo); EmitConversion.ToString(generator, Name.ComputedName.ResultType); if (prefix != null) { generator.CallStatic(ReflectionHelpers.String_Concat_String_String); } } // argumentNames generator.LoadInt32(this.Arguments.Count); generator.NewArray(typeof(string)); for (int i = 0; i < this.Arguments.Count; i++) { generator.Duplicate(); generator.LoadInt32(i); generator.LoadString(this.Arguments[i].Name); generator.StoreArrayElement(typeof(string)); } // scope Scope.GenerateReference(generator, optimizationInfo); // bodyText generator.LoadString(this.BodyText); // body generator.LoadInt64(generatedMethodID); generator.Call(ReflectionHelpers.GeneratedMethod_Load); // strictMode generator.LoadBoolean(this.context.StrictMode); // container if (ContainerVariable != null) { generator.LoadVariable(ContainerVariable); } else { generator.LoadNull(); } // CreateFunction(ObjectInstance prototype, string name, IList<string> argumentNames, // RuntimeScope scope, Func<Scope, object, object[], object> body, // bool strictMode, FunctionInstance container) generator.CallStatic(ReflectionHelpers.ReflectionHelpers_CreateFunction); }
/// <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) { // Generate a new method. this.context.GenerateCode(); // Add the generated method to the nested function list. if (optimizationInfo.NestedFunctions == null) optimizationInfo.NestedFunctions = new List<GeneratedMethod>(); optimizationInfo.NestedFunctions.Add(this.context.GeneratedMethod); // Add all the nested methods to the parent list. if (this.context.GeneratedMethod.Dependencies != null) { foreach (var nestedFunctionExpression in this.context.GeneratedMethod.Dependencies) optimizationInfo.NestedFunctions.Add(nestedFunctionExpression); } // Store the generated method in the cache. long generatedMethodID = GeneratedMethod.Save(this.context.GeneratedMethod); // Create a UserDefinedFunction. // prototype EmitHelpers.LoadScriptEngine(generator); generator.Call(ReflectionHelpers.ScriptEngine_Function); generator.Call(ReflectionHelpers.FunctionInstance_InstancePrototype); // name generator.LoadString(this.FunctionName); // argumentNames generator.LoadInt32(this.ArgumentNames.Count); generator.NewArray(typeof(string)); for (int i = 0; i < this.ArgumentNames.Count; i++) { generator.Duplicate(); generator.LoadInt32(i); generator.LoadString(this.ArgumentNames[i]); generator.StoreArrayElement(typeof(string)); } // scope EmitHelpers.LoadScope(generator); // bodyText generator.LoadString(this.BodyText); // body generator.LoadInt64(generatedMethodID); generator.Call(ReflectionHelpers.GeneratedMethod_Load); // strictMode generator.LoadBoolean(this.context.StrictMode); // new UserDefinedFunction(ObjectInstance prototype, string name, IList<string> argumentNames, DeclarativeScope scope, Func<Scope, object, object[], object> body, bool strictMode) generator.NewObject(ReflectionHelpers.UserDefinedFunction_Constructor); }
/// <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) { // Literals cannot have side-effects so if a return value is not expected then generate // nothing. //if (optimizationInfo.SuppressReturnValue == true) // return; if (this.Value is int) { generator.LoadInt32((int)this.Value); } else if (this.Value is double) { generator.LoadDouble((double)this.Value); } else if (this.Value is string) { generator.LoadString((string)this.Value); } else if (this.Value is bool) { generator.LoadBoolean((bool)this.Value); } else if (this.Value is RegularExpressionLiteral) { // RegExp var sharedRegExpVariable = optimizationInfo.GetRegExpVariable(generator, (RegularExpressionLiteral)this.Value); var label1 = generator.CreateLabel(); var label2 = generator.CreateLabel(); // if (sharedRegExp == null) { generator.LoadVariable(sharedRegExpVariable); generator.LoadNull(); generator.BranchIfNotEqual(label1); // sharedRegExp = Global.RegExp.Construct(source, flags) EmitHelpers.LoadScriptEngine(generator); generator.Call(ReflectionHelpers.ScriptEngine_RegExp); generator.LoadString(((RegularExpressionLiteral)this.Value).Pattern); generator.LoadString(((RegularExpressionLiteral)this.Value).Flags); generator.Call(ReflectionHelpers.RegExp_Construct); generator.Duplicate(); generator.StoreVariable(sharedRegExpVariable); // } else { generator.Branch(label2); generator.DefineLabelPosition(label1); // Global.RegExp.Construct(sharedRegExp, flags) EmitHelpers.LoadScriptEngine(generator); generator.Call(ReflectionHelpers.ScriptEngine_RegExp); generator.LoadVariable(sharedRegExpVariable); generator.LoadNull(); generator.Call(ReflectionHelpers.RegExp_Construct); // } generator.DefineLabelPosition(label2); } else if (this.Value == Null.Value) { // Null. EmitHelpers.EmitNull(generator); } else if (this.Value == Undefined.Value) { // Undefined. EmitHelpers.EmitUndefined(generator); } else if (this.Value is List <Expression> ) { // Construct an array literal. var arrayLiteral = (List <Expression>) this.Value; // Operands for ArrayConstructor.New() are: an ArrayConstructor instance (ArrayConstructor), an array (object[]) // ArrayConstructor EmitHelpers.LoadScriptEngine(generator); generator.Call(ReflectionHelpers.ScriptEngine_Array); // object[] generator.LoadInt32(arrayLiteral.Count); generator.NewArray(typeof(object)); for (int i = 0; i < arrayLiteral.Count; i++) { // Operands for StoreArrayElement() are: an array (object[]), index (int), value (object). // Array generator.Duplicate(); // Index generator.LoadInt32(i); // Value var elementExpression = arrayLiteral[i]; if (elementExpression == null) { generator.LoadNull(); } else { elementExpression.GenerateCode(generator, optimizationInfo); EmitConversion.ToAny(generator, elementExpression.ResultType); } // Store the element value. generator.StoreArrayElement(typeof(object)); } // ArrayConstructor.New(object[]) generator.Call(ReflectionHelpers.Array_New); } else if (this.Value is List <KeyValuePair <Expression, Expression> > ) { // This is an object literal. var properties = (List <KeyValuePair <Expression, Expression> >) this.Value; // Create a new object. EmitHelpers.LoadScriptEngine(generator); generator.Call(ReflectionHelpers.ScriptEngine_Object); generator.Call(ReflectionHelpers.Object_Construct); foreach (var keyValuePair in properties) { Expression propertyName = keyValuePair.Key; Expression propertyValue = keyValuePair.Value; generator.Duplicate(); // The key can be a property name or an expression that evaluates to a name. propertyName.GenerateCode(generator, optimizationInfo); EmitConversion.ToPropertyKey(generator, propertyName.ResultType); var functionValue = propertyValue as FunctionExpression; if (functionValue != null && functionValue.DeclarationType == FunctionDeclarationType.Getter) { // Add a getter to the object. functionValue.GenerateCode(generator, optimizationInfo); // Support the inferred function displayName property. if (propertyName is LiteralExpression && ((LiteralExpression)propertyName).Value is string) { functionValue.GenerateDisplayName(generator, optimizationInfo, "get " + (string)((LiteralExpression)propertyName).Value, true); } generator.Call(ReflectionHelpers.ReflectionHelpers_SetObjectLiteralGetter); } else if (functionValue != null && functionValue.DeclarationType == FunctionDeclarationType.Setter) { // Add a setter to the object. functionValue.GenerateCode(generator, optimizationInfo); // Support the inferred function displayName property. if (propertyName is LiteralExpression && ((LiteralExpression)propertyName).Value is string) { functionValue.GenerateDisplayName(generator, optimizationInfo, "set " + (string)((LiteralExpression)propertyName).Value, true); } generator.Call(ReflectionHelpers.ReflectionHelpers_SetObjectLiteralSetter); } else { // Add a new property to the object. propertyValue.GenerateCode(generator, optimizationInfo); // Support the inferred function displayName property. if (propertyValue is FunctionExpression && propertyName is LiteralExpression && ((LiteralExpression)propertyName).Value is string) { ((FunctionExpression)propertyValue).GenerateDisplayName(generator, optimizationInfo, (string)((LiteralExpression)propertyName).Value, false); } EmitConversion.ToAny(generator, propertyValue.ResultType); generator.Call(ReflectionHelpers.ReflectionHelpers_SetObjectLiteralValue); } } } else { throw new NotImplementedException("Unknown literal type."); } }
/// <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) { // Literals cannot have side-effects so if a return value is not expected then generate // nothing. //if (optimizationInfo.SuppressReturnValue == true) // return; if (this.Value is int) { generator.LoadInt32((int)this.Value); } else if (this.Value is double) { generator.LoadDouble((double)this.Value); } else if (this.Value is string) { generator.LoadString((string)this.Value); } else if (this.Value is bool) { generator.LoadBoolean((bool)this.Value); } else if (this.Value is RegularExpressionLiteral) { // RegExp var sharedRegExpVariable = optimizationInfo.GetRegExpVariable(generator, (RegularExpressionLiteral)this.Value); var label1 = generator.CreateLabel(); var label2 = generator.CreateLabel(); // if (sharedRegExp == null) { generator.LoadVariable(sharedRegExpVariable); generator.LoadNull(); generator.BranchIfNotEqual(label1); // sharedRegExp = Global.RegExp.Construct(source, flags) EmitHelpers.LoadScriptEngine(generator); generator.Call(ReflectionHelpers.ScriptEngine_RegExp); generator.LoadString(((RegularExpressionLiteral)this.Value).Pattern); generator.LoadString(((RegularExpressionLiteral)this.Value).Flags); generator.Call(ReflectionHelpers.RegExp_Construct); generator.Duplicate(); generator.StoreVariable(sharedRegExpVariable); // } else { generator.Branch(label2); generator.DefineLabelPosition(label1); // Global.RegExp.Construct(sharedRegExp, flags) EmitHelpers.LoadScriptEngine(generator); generator.Call(ReflectionHelpers.ScriptEngine_RegExp); generator.LoadVariable(sharedRegExpVariable); generator.LoadNull(); generator.Call(ReflectionHelpers.RegExp_Construct); // } generator.DefineLabelPosition(label2); } else if (this.Value == Null.Value) { // Null. EmitHelpers.EmitNull(generator); } else if (this.Value == Undefined.Value) { // Undefined. EmitHelpers.EmitUndefined(generator); } else if (this.Value is List <Expression> ) { // Construct an array literal. var arrayLiteral = (List <Expression>) this.Value; // Operands for ArrayConstructor.New() are: an ArrayConstructor instance (ArrayConstructor), an array (object[]) // ArrayConstructor EmitHelpers.LoadScriptEngine(generator); generator.Call(ReflectionHelpers.ScriptEngine_Array); // object[] generator.LoadInt32(arrayLiteral.Count); generator.NewArray(typeof(object)); for (int i = 0; i < arrayLiteral.Count; i++) { // Operands for StoreArrayElement() are: an array (object[]), index (int), value (object). // Array generator.Duplicate(); // Index generator.LoadInt32(i); // Value var elementExpression = arrayLiteral[i]; if (elementExpression == null) { generator.LoadNull(); } else { elementExpression.GenerateCode(generator, optimizationInfo); EmitConversion.ToAny(generator, elementExpression.ResultType); } // Store the element value. generator.StoreArrayElement(typeof(object)); } // ArrayConstructor.New(object[]) generator.Call(ReflectionHelpers.Array_New); } else if (this.Value is Dictionary <string, object> ) { // This is an object literal. var properties = (Dictionary <string, object>) this.Value; // Create a new object. EmitHelpers.LoadScriptEngine(generator); generator.Call(ReflectionHelpers.ScriptEngine_Object); generator.Call(ReflectionHelpers.Object_Construct); foreach (var keyValuePair in properties) { string propertyName = keyValuePair.Key; object propertyValue = keyValuePair.Value; generator.Duplicate(); generator.LoadString(propertyName); if (propertyValue is Expression) { // Add a new property to the object. var dataPropertyValue = (Expression)propertyValue; dataPropertyValue.GenerateCode(generator, optimizationInfo); // Support the inferred function displayName property. if (dataPropertyValue is FunctionExpression) { ((FunctionExpression)dataPropertyValue).GenerateDisplayName(generator, optimizationInfo, propertyName, false); } EmitConversion.ToAny(generator, dataPropertyValue.ResultType); generator.LoadBoolean(optimizationInfo.StrictMode); generator.Call(ReflectionHelpers.ObjectInstance_SetPropertyValue_String); } else if (propertyValue is Parser.ObjectLiteralAccessor) { // Add a new getter/setter to the object. var accessorValue = (Parser.ObjectLiteralAccessor)propertyValue; if (accessorValue.Getter != null) { accessorValue.Getter.GenerateCode(generator, optimizationInfo); // Support the inferred function displayName property. accessorValue.Getter.GenerateDisplayName(generator, optimizationInfo, "get " + propertyName, true); EmitConversion.ToAny(generator, accessorValue.Getter.ResultType); } else { generator.LoadNull(); } if (accessorValue.Setter != null) { accessorValue.Setter.GenerateCode(generator, optimizationInfo); // Support the inferred function displayName property. accessorValue.Setter.GenerateDisplayName(generator, optimizationInfo, "set " + propertyName, true); EmitConversion.ToAny(generator, accessorValue.Setter.ResultType); } else { generator.LoadNull(); } generator.LoadInt32((int)Library.PropertyAttributes.FullAccess); generator.NewObject(ReflectionHelpers.PropertyDescriptor_Constructor3); generator.LoadBoolean(false); generator.Call(ReflectionHelpers.ObjectInstance_DefineProperty); generator.Pop(); } else { throw new InvalidOperationException("Invalid property value type in object literal."); } } } else { throw new NotImplementedException("Unknown literal type."); } }
/// <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) { // Literals cannot have side-effects so if a return value is not expected then generate // nothing. //if (optimizationInfo.SuppressReturnValue == true) // return; if (this.Value is int) { generator.LoadInt32((int)this.Value); } else if (this.Value is double) { generator.LoadDouble((double)this.Value); } else if (this.Value is string) { generator.LoadString((string)this.Value); } else if (this.Value is bool) { generator.LoadBoolean((bool)this.Value); } else if (this.Value is RegularExpressionLiteral) { // RegExp var sharedRegExpVariable = optimizationInfo.GetRegExpVariable(generator, (RegularExpressionLiteral)this.Value); var label1 = generator.CreateLabel(); var label2 = generator.CreateLabel(); // if (sharedRegExp == null) { generator.LoadVariable(sharedRegExpVariable); generator.BranchIfNotNull(label1); // sharedRegExp = Global.RegExp.Construct(source, flags) EmitHelpers.LoadScriptEngine(generator); generator.Call(ReflectionHelpers.ScriptEngine_RegExp); generator.LoadString(((RegularExpressionLiteral)this.Value).Pattern); generator.LoadString(((RegularExpressionLiteral)this.Value).Flags); generator.Call(ReflectionHelpers.RegExp_Construct); generator.Duplicate(); generator.StoreVariable(sharedRegExpVariable); // } else { generator.Branch(label2); generator.DefineLabelPosition(label1); // Global.RegExp.Construct(sharedRegExp, flags) EmitHelpers.LoadScriptEngine(generator); generator.Call(ReflectionHelpers.ScriptEngine_RegExp); generator.LoadVariable(sharedRegExpVariable); generator.LoadNull(); generator.Call(ReflectionHelpers.RegExp_Construct); // } generator.DefineLabelPosition(label2); } else if (this.Value == Null.Value) { // Null. EmitHelpers.EmitNull(generator); } else if (this.Value == Undefined.Value) { // Undefined. EmitHelpers.EmitUndefined(generator); } else { throw new NotImplementedException("Unknown literal type."); } }
/// <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) { // If a return value is not expected, generate only the side-effects. /*if (optimizationInfo.SuppressReturnValue == true) * { * this.GenerateSideEffects(generator, optimizationInfo); * return; * }*/ // Special case the addition operator. if (this.OperatorType == OperatorType.Add) { GenerateAdd(generator, optimizationInfo); return; } // Special case the instanceof operator. if (this.OperatorType == OperatorType.InstanceOf) { GenerateInstanceOf(generator, optimizationInfo); return; } // Special case the in operator. if (this.OperatorType == OperatorType.In) { GenerateIn(generator, optimizationInfo); return; } // Special case the relational operators. if (this.OperatorType == OperatorType.LessThan || this.OperatorType == OperatorType.LessThanOrEqual || this.OperatorType == OperatorType.GreaterThan || this.OperatorType == OperatorType.GreaterThanOrEqual) { GenerateRelational(generator, optimizationInfo); return; } // Special case the logical operators. if (this.OperatorType == OperatorType.LogicalAnd || this.OperatorType == OperatorType.LogicalOr) { GenerateLogical(generator, optimizationInfo); return; } // Load the left hand side onto the stack. this.Left.GenerateCode(generator, optimizationInfo); // Convert the left argument. switch (this.OperatorType) { // Arithmetic operations. case OperatorType.Subtract: case OperatorType.Multiply: case OperatorType.Divide: case OperatorType.Modulo: case OperatorType.Exponentiation: EmitConversion.ToNumber(generator, this.Left.ResultType); break; // Bitwise operations. case OperatorType.BitwiseAnd: case OperatorType.BitwiseOr: case OperatorType.BitwiseXor: case OperatorType.LeftShift: case OperatorType.SignedRightShift: case OperatorType.UnsignedRightShift: EmitConversion.ToInt32(generator, this.Left.ResultType); break; // Equality operations. case OperatorType.Equal: case OperatorType.StrictlyEqual: case OperatorType.NotEqual: case OperatorType.StrictlyNotEqual: EmitConversion.ToAny(generator, this.Left.ResultType); break; } // Load the right hand side onto the stack. this.Right.GenerateCode(generator, optimizationInfo); // Convert the right argument. switch (this.OperatorType) { // Arithmetic operations. case OperatorType.Subtract: case OperatorType.Multiply: case OperatorType.Divide: case OperatorType.Modulo: case OperatorType.Exponentiation: EmitConversion.ToNumber(generator, this.Right.ResultType); break; // Bitwise operations. case OperatorType.BitwiseAnd: case OperatorType.BitwiseOr: case OperatorType.BitwiseXor: EmitConversion.ToInt32(generator, this.Right.ResultType); break; case OperatorType.LeftShift: case OperatorType.SignedRightShift: case OperatorType.UnsignedRightShift: EmitConversion.ToUInt32(generator, this.Right.ResultType); generator.LoadInt32(0x1F); generator.BitwiseAnd(); break; // Equality operations. case OperatorType.Equal: case OperatorType.StrictlyEqual: case OperatorType.NotEqual: case OperatorType.StrictlyNotEqual: EmitConversion.ToAny(generator, this.Right.ResultType); break; } // Apply the operator. switch (this.OperatorType) { // Arithmetic operations. case OperatorType.Subtract: generator.Subtract(); break; case OperatorType.Multiply: generator.Multiply(); break; case OperatorType.Divide: generator.Divide(); break; case OperatorType.Modulo: generator.Remainder(); break; case OperatorType.Exponentiation: generator.CallStatic(ReflectionHelpers.Math_Pow); break; // Bitwise operations. case OperatorType.BitwiseAnd: generator.BitwiseAnd(); break; case OperatorType.BitwiseOr: generator.BitwiseOr(); break; case OperatorType.BitwiseXor: generator.BitwiseXor(); break; // Shift operations. case OperatorType.LeftShift: generator.ShiftLeft(); break; case OperatorType.SignedRightShift: generator.ShiftRight(); break; case OperatorType.UnsignedRightShift: generator.ShiftRightUnsigned(); EmitConversion.ToNumber(generator, PrimitiveType.UInt32); break; // Equality operations. case OperatorType.Equal: generator.Call(ReflectionHelpers.TypeComparer_Equals); break; case OperatorType.StrictlyEqual: generator.Call(ReflectionHelpers.TypeComparer_StrictEquals); break; case OperatorType.NotEqual: generator.Call(ReflectionHelpers.TypeComparer_Equals); generator.LoadBoolean(false); generator.CompareEqual(); break; case OperatorType.StrictlyNotEqual: generator.Call(ReflectionHelpers.TypeComparer_StrictEquals); generator.LoadBoolean(false); generator.CompareEqual(); break; default: throw new NotImplementedException(string.Format("Unsupported operator {0}", this.OperatorType)); } }
/// <summary> /// Stores the value on the top of the stack in the reference. /// </summary> /// <param name="generator"> The generator to output the CIL to. </param> /// <param name="optimizationInfo"> Information about any optimizations that should be performed. </param> /// <param name="valueType"> The primitive type of the value that is on the top of the stack. </param> /// <param name="throwIfUnresolvable"> <c>true</c> to throw a ReferenceError exception if /// the name is unresolvable; <c>false</c> to create a new property instead. </param> public void GenerateSet(ILGenerator generator, OptimizationInfo optimizationInfo, PrimitiveType valueType, bool throwIfUnresolvable) { string propertyName = null; bool isArrayIndex = false; //optimizationInfo = optimizationInfo.RemoveFlags(OptimizationFlags.SuppressReturnValue); // Right-hand-side can be a property name (a.b) if (this.OperatorType == OperatorType.MemberAccess) { var rhs = this.GetOperand(1) as NameExpression; if (rhs == null) throw new JavaScriptException(optimizationInfo.Engine, "SyntaxError", "Invalid member access", optimizationInfo.SourceSpan.StartLine, optimizationInfo.Source.Path, optimizationInfo.FunctionName); propertyName = rhs.Name; } // Or a constant indexer (a['b']) if (this.OperatorType == OperatorType.Index) { var rhs = this.GetOperand(1) as LiteralExpression; if (rhs != null) { propertyName = TypeConverter.ToString(rhs.Value); // Or a array index (a[0]) if (rhs.ResultType == PrimitiveType.Int32 || (propertyName != null && Library.ArrayInstance.ParseArrayIndex(propertyName) != uint.MaxValue)) isArrayIndex = true; } } // Convert the value to an object and store it in a temporary variable. var value = generator.CreateTemporaryVariable(typeof(object)); EmitConversion.ToAny(generator, valueType); generator.StoreVariable(value); if (isArrayIndex == true) { // Array indexer // ------------- // xxx = object[index] // Load the left-hand side and convert to an object instance. var lhs = this.GetOperand(0); lhs.GenerateCode(generator, optimizationInfo); EmitConversion.ToObject(generator, lhs.ResultType, optimizationInfo); // Load the right-hand side and convert to a uint32. var rhs = this.GetOperand(1); rhs.GenerateCode(generator, optimizationInfo); EmitConversion.ToUInt32(generator, rhs.ResultType); // Call the indexer. generator.LoadVariable(value); generator.LoadBoolean(optimizationInfo.StrictMode); generator.Call(ReflectionHelpers.ObjectInstance_SetPropertyValue_Int); } else if (propertyName != null) { //// Load the left-hand side and convert to an object instance. //var lhs = this.GetOperand(0); //lhs.GenerateCode(generator, optimizationInfo); //EmitConversion.ToObject(generator, lhs.ResultType); //// Call the indexer. //generator.LoadString(propertyName); //generator.LoadVariable(value); //generator.LoadBoolean(optimizationInfo.StrictMode); //generator.Call(ReflectionHelpers.ObjectInstance_SetPropertyValue_String); // Named property modification (e.g. x.property = y) // ------------------------------------------------- // __object_cacheKey = null; // __object_property_cachedIndex = 0; // ... // if (__object_cacheKey != object.InlineCacheKey) // object.InlineSetPropertyValue("property", value, strictMode, out __object_property_cachedIndex, out __object_cacheKey) // else // object.InlinePropertyValues[__object_property_cachedIndex] = value; // Load the left-hand side and convert to an object instance. var lhs = this.GetOperand(0); lhs.GenerateCode(generator, optimizationInfo); EmitConversion.ToObject(generator, lhs.ResultType, optimizationInfo); // TODO: share these variables somehow. var cacheKey = generator.DeclareVariable(typeof(object)); var cachedIndex = generator.DeclareVariable(typeof(int)); // Store the object into a temp variable. var objectInstance = generator.DeclareVariable(PrimitiveType.Object); generator.StoreVariable(objectInstance); // if (__object_cacheKey != object.InlineCacheKey) generator.LoadVariable(cacheKey); generator.LoadVariable(objectInstance); generator.Call(ReflectionHelpers.ObjectInstance_InlineCacheKey); var elseClause = generator.CreateLabel(); generator.BranchIfEqual(elseClause); // xxx = object.InlineSetPropertyValue("property", value, strictMode, out __object_property_cachedIndex, out __object_cacheKey) generator.LoadVariable(objectInstance); generator.LoadString(propertyName); generator.LoadVariable(value); generator.LoadBoolean(optimizationInfo.StrictMode); generator.LoadAddressOfVariable(cachedIndex); generator.LoadAddressOfVariable(cacheKey); generator.Call(ReflectionHelpers.ObjectInstance_InlineSetPropertyValue); var endOfIf = generator.CreateLabel(); generator.Branch(endOfIf); // else generator.DefineLabelPosition(elseClause); // object.InlinePropertyValues[__object_property_cachedIndex] = value; generator.LoadVariable(objectInstance); generator.Call(ReflectionHelpers.ObjectInstance_InlinePropertyValues); generator.LoadVariable(cachedIndex); generator.LoadVariable(value); generator.StoreArrayElement(typeof(object)); // End of the if statement generator.DefineLabelPosition(endOfIf); } else { // Dynamic property access // ----------------------- // xxx = object.Get(x) // Load the left-hand side and convert to an object instance. var lhs = this.GetOperand(0); lhs.GenerateCode(generator, optimizationInfo); EmitConversion.ToObject(generator, lhs.ResultType, optimizationInfo); // Load the property name and convert to a string. var rhs = this.GetOperand(1); rhs.GenerateCode(generator, optimizationInfo); EmitConversion.ToString(generator, rhs.ResultType); // Call the indexer. generator.LoadVariable(value); generator.LoadBoolean(optimizationInfo.StrictMode); generator.Call(ReflectionHelpers.ObjectInstance_SetPropertyValue_String); } // The temporary variable is no longer needed. generator.ReleaseTemporaryVariable(value); }
/// <summary> /// Stores the value on the top of the stack in the reference. /// </summary> /// <param name="generator"> The generator to output the CIL to. </param> /// <param name="optimizationInfo"> Information about any optimizations that should be performed. </param> /// <param name="valueType"> The primitive type of the value that is on the top of the stack. </param> /// <param name="throwIfUnresolvable"> <c>true</c> to throw a ReferenceError exception if /// the name is unresolvable; <c>false</c> to create a new property instead. </param> public void GenerateSet(ILGenerator generator, OptimizationInfo optimizationInfo, PrimitiveType valueType, bool throwIfUnresolvable) { // The value is initially on the top of the stack but is stored in this variable // at the last possible moment. ILLocalVariable value = null; var scope = this.Scope; ILLocalVariable scopeVariable = null; var endOfSet = generator.CreateLabel(); do { if (scope is DeclarativeScope) { // Get information about the variable. var variable = scope.GetDeclaredVariable(this.Name); if (variable != null) { // The variable was declared in this scope. if (scope.ExistsAtRuntime == false) { // The scope has been optimized away. The value of the variable is stored // in an ILVariable. // Declare an IL local variable if no storage location has been allocated yet. if (variable.Store == null) { variable.Store = generator.DeclareVariable(typeof(object), variable.Name); } if (value == null) { // The value to store is on the top of the stack - convert it to the // storage type of the variable. EmitConversion.Convert(generator, valueType, variable.Type, optimizationInfo); } else { // The value to store is in a temporary variable. generator.LoadVariable(value); EmitConversion.Convert(generator, PrimitiveType.Any, variable.Type, optimizationInfo); } // Store the value in the variable. generator.StoreVariable(variable.Store); } else if (variable.Writable == true) { if (value == null) { // The value to store is on the top of the stack - convert it to an // object and store it in a temporary variable. EmitConversion.Convert(generator, valueType, PrimitiveType.Any, optimizationInfo); value = generator.CreateTemporaryVariable(typeof(object)); generator.StoreVariable(value); } // scope.Values[index] = value if (scopeVariable == null) { EmitHelpers.LoadScope(generator); } else { generator.LoadVariable(scopeVariable); } generator.CastClass(typeof(DeclarativeScope)); generator.Call(ReflectionHelpers.DeclarativeScope_Values); generator.LoadInt32(variable.Index); generator.LoadVariable(value); generator.StoreArrayElement(typeof(object)); } else { // The variable exists, but is read-only. // Pop the value off the stack (if it is still there). if (value == null) { generator.Pop(); } } // The variable was found - no need to search any more parent scopes. break; } else { // The variable was not defined at compile time, but may have been // introduced by an eval() statement. if (optimizationInfo.MethodOptimizationHints.HasEval == true) { if (value == null) { // The value to store is on the top of the stack - convert it to an // object and store it in a temporary variable. EmitConversion.Convert(generator, valueType, PrimitiveType.Any, optimizationInfo); value = generator.CreateTemporaryVariable(typeof(object)); generator.StoreVariable(value); } // Check the variable exists: if (scope.HasValue(variableName) == true) { if (scopeVariable == null) { EmitHelpers.LoadScope(generator); } else { generator.LoadVariable(scopeVariable); } generator.CastClass(typeof(DeclarativeScope)); generator.LoadString(this.Name); generator.Call(ReflectionHelpers.Scope_HasValue); var hasValueClause = generator.CreateLabel(); generator.BranchIfFalse(hasValueClause); // Set the value of the variable. if (scopeVariable == null) { EmitHelpers.LoadScope(generator); } else { generator.LoadVariable(scopeVariable); } generator.CastClass(typeof(DeclarativeScope)); generator.LoadString(this.Name); generator.LoadVariable(value); generator.Call(ReflectionHelpers.Scope_SetValue); generator.Branch(endOfSet); // } generator.DefineLabelPosition(hasValueClause); } } } else { if (value == null) { // The value to store is on the top of the stack - convert it to an // object and store it in a temporary variable. EmitConversion.Convert(generator, valueType, PrimitiveType.Any, optimizationInfo); value = generator.CreateTemporaryVariable(typeof(object)); generator.StoreVariable(value); } if (scope.ParentScope == null) { // Optimization: if this is the global scope, use hidden classes to // optimize variable access. // Global variable modification // ---------------------------- // __object_cacheKey = null; // __object_property_cachedIndex = 0; // ... // if (__object_cacheKey != object.InlineCacheKey) // object.InlineSetPropertyValueIfExists("property", value, strictMode, out __object_property_cachedIndex, out __object_cacheKey) // else // object.InlinePropertyValues[__object_property_cachedIndex] = value; // Get a reference to the global object. if (scopeVariable == null) { EmitHelpers.LoadScope(generator); } else { generator.LoadVariable(scopeVariable); } generator.CastClass(typeof(ObjectScope)); generator.Call(ReflectionHelpers.ObjectScope_ScopeObject); // TODO: share these variables somehow. var cacheKey = generator.DeclareVariable(typeof(object)); var cachedIndex = generator.DeclareVariable(typeof(int)); // Store the object into a temp variable. var objectInstance = generator.DeclareVariable(PrimitiveType.Object); generator.StoreVariable(objectInstance); // if (__object_cacheKey != object.InlineCacheKey) generator.LoadVariable(cacheKey); generator.LoadVariable(objectInstance); generator.Call(ReflectionHelpers.ObjectInstance_InlineCacheKey); var elseClause = generator.CreateLabel(); generator.BranchIfEqual(elseClause); // xxx = object.InlineSetPropertyValueIfExists("property", value, strictMode, out __object_property_cachedIndex, out __object_cacheKey) generator.LoadVariable(objectInstance); generator.LoadString(this.Name); generator.LoadVariable(value); generator.LoadBoolean(optimizationInfo.StrictMode); generator.LoadAddressOfVariable(cachedIndex); generator.LoadAddressOfVariable(cacheKey); if (throwIfUnresolvable == false) { // Set the property value unconditionally. generator.Call(ReflectionHelpers.ObjectInstance_InlineSetPropertyValue); } else { // Set the property value if the property exists. generator.Call(ReflectionHelpers.ObjectInstance_InlineSetPropertyValueIfExists); // The return value is true if the property was defined, and false if it wasn't. generator.BranchIfTrue(endOfSet); } var endOfIf = generator.CreateLabel(); generator.Branch(endOfIf); // else generator.DefineLabelPosition(elseClause); // object.InlinePropertyValues[__object_property_cachedIndex] = value; generator.LoadVariable(objectInstance); generator.Call(ReflectionHelpers.ObjectInstance_InlinePropertyValues); generator.LoadVariable(cachedIndex); generator.LoadVariable(value); generator.StoreArrayElement(typeof(object)); generator.Branch(endOfSet); // End of the if statement generator.DefineLabelPosition(endOfIf); } else { // Slow route. if (scopeVariable == null) { EmitHelpers.LoadScope(generator); } else { generator.LoadVariable(scopeVariable); } generator.CastClass(typeof(ObjectScope)); generator.Call(ReflectionHelpers.ObjectScope_ScopeObject); generator.LoadString(this.Name); generator.LoadVariable(value); generator.LoadBoolean(optimizationInfo.StrictMode); if (scope.ParentScope == null && throwIfUnresolvable == false) { // Set the property value unconditionally. generator.Call(ReflectionHelpers.ObjectInstance_SetPropertyValue_Object); } else { // Set the property value if the property exists. generator.Call(ReflectionHelpers.ObjectInstance_SetPropertyValueIfExists); // The return value is true if the property was defined, and false if it wasn't. generator.BranchIfTrue(endOfSet); } } } // Try the parent scope. if (scope.ParentScope != null && scope.ExistsAtRuntime == true) { if (scopeVariable == null) { scopeVariable = generator.CreateTemporaryVariable(typeof(Scope)); EmitHelpers.LoadScope(generator); } else { generator.LoadVariable(scopeVariable); } generator.Call(ReflectionHelpers.Scope_ParentScope); generator.StoreVariable(scopeVariable); } scope = scope.ParentScope; } while (scope != null); // The value might be still on top of the stack. if (value == null && scope == null) { generator.Pop(); } // Throw an error if the name does not exist and throwIfUnresolvable is true. if (scope == null && throwIfUnresolvable == true) { EmitHelpers.EmitThrow(generator, ErrorType.ReferenceError, this.Name + " is not defined", optimizationInfo); } // Release the temporary variables. if (value != null) { generator.ReleaseTemporaryVariable(value); } if (scopeVariable != null) { generator.ReleaseTemporaryVariable(scopeVariable); } // Define a label at the end. generator.DefineLabelPosition(endOfSet); }
/// <summary> /// Deletes the reference and pushes <c>true</c> if the delete succeeded, or <c>false</c> /// if the delete failed. /// </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 void GenerateDelete(ILGenerator generator, OptimizationInfo optimizationInfo) { // Load the left-hand side and convert to an object instance. var lhs = this.GetOperand(0); lhs.GenerateCode(generator, optimizationInfo); EmitConversion.ToObject(generator, lhs.ResultType, optimizationInfo); // Load the property name and convert to a string. var rhs = this.GetOperand(1); if (this.OperatorType == OperatorType.MemberAccess && rhs is NameExpression) generator.LoadString((rhs as NameExpression).Name); else { rhs.GenerateCode(generator, optimizationInfo); EmitConversion.ToString(generator, rhs.ResultType); } // Call Delete() generator.LoadBoolean(optimizationInfo.StrictMode); generator.Call(ReflectionHelpers.ObjectInstance_Delete); // If the return value is not wanted then pop it from the stack. //if (optimizationInfo.SuppressReturnValue == true) // generator.Pop(); }
/// <summary> /// Stores the value on the top of the stack in the reference. /// </summary> /// <param name="generator"> The generator to output the CIL to. </param> /// <param name="optimizationInfo"> Information about any optimizations that should be performed. </param> /// <param name="valueType"> The primitive type of the value that is on the top of the stack. </param> /// <param name="throwIfUnresolvable"> <c>true</c> to throw a ReferenceError exception if /// the name is unresolvable; <c>false</c> to create a new property instead. </param> public void GenerateSet(ILGenerator generator, OptimizationInfo optimizationInfo, PrimitiveType valueType, bool throwIfUnresolvable) { string propertyName = null; TypeOfMemberAccess memberAccessType = DetermineTypeOfMemberAccess(optimizationInfo, out propertyName); if (memberAccessType == TypeOfMemberAccess.ArrayIndex) { // Array indexer // ------------- // xxx = object[index] // Call the indexer. EmitConversion.ToAny(generator, valueType); generator.LoadBoolean(optimizationInfo.StrictMode); generator.Call(ReflectionHelpers.ObjectInstance_SetPropertyValue_Int); } else if (memberAccessType == TypeOfMemberAccess.Static) { // Named property modification (e.g. x.property = y) // ------------------------------------------------- // __object_cacheKey = null; // __object_property_cachedIndex = 0; // ... // if (__object_cacheKey != object.InlineCacheKey) // object.InlineSetPropertyValue("property", value, strictMode, out __object_property_cachedIndex, out __object_cacheKey) // else // object.InlinePropertyValues[__object_property_cachedIndex] = value; // Convert the value to an object and store it in a temporary variable. var value = generator.CreateTemporaryVariable(typeof(object)); EmitConversion.ToAny(generator, valueType); generator.StoreVariable(value); // TODO: share these variables somehow. var cacheKey = generator.DeclareVariable(typeof(object)); var cachedIndex = generator.DeclareVariable(typeof(int)); // Store the object into a temp variable. var objectInstance = generator.DeclareVariable(PrimitiveType.Object); generator.StoreVariable(objectInstance); // if (__object_cacheKey != object.InlineCacheKey) generator.LoadVariable(cacheKey); generator.LoadVariable(objectInstance); generator.Call(ReflectionHelpers.ObjectInstance_InlineCacheKey); var elseClause = generator.CreateLabel(); generator.BranchIfEqual(elseClause); // xxx = object.InlineSetPropertyValue("property", value, strictMode, out __object_property_cachedIndex, out __object_cacheKey) generator.LoadVariable(objectInstance); generator.LoadString(propertyName); generator.LoadVariable(value); generator.LoadBoolean(optimizationInfo.StrictMode); generator.LoadAddressOfVariable(cachedIndex); generator.LoadAddressOfVariable(cacheKey); generator.Call(ReflectionHelpers.ObjectInstance_InlineSetPropertyValue); var endOfIf = generator.CreateLabel(); generator.Branch(endOfIf); // else generator.DefineLabelPosition(elseClause); // object.InlinePropertyValues[__object_property_cachedIndex] = value; generator.LoadVariable(objectInstance); generator.Call(ReflectionHelpers.ObjectInstance_InlinePropertyValues); generator.LoadVariable(cachedIndex); generator.LoadVariable(value); generator.StoreArrayElement(typeof(object)); // End of the if statement generator.DefineLabelPosition(endOfIf); // The temporary variable is no longer needed. generator.ReleaseTemporaryVariable(value); } else { // Dynamic property access // ----------------------- // xxx = object.Get(x) // Call the indexer. EmitConversion.ToAny(generator, valueType); generator.LoadBoolean(optimizationInfo.StrictMode); generator.Call(ReflectionHelpers.ObjectInstance_SetPropertyValue_String); } }
/// <summary> /// Emits the given value. Only possible for certain types. /// </summary> /// <param name="generator"> The IL generator. </param> /// <param name="value"> The value to emit. </param> public static void EmitValue(ILGenerator generator, object value) { if (value == null) { generator.LoadNull(); } else { switch (Type.GetTypeCode(value.GetType())) { case TypeCode.Boolean: generator.LoadBoolean((bool)value); break; case TypeCode.Byte: generator.LoadInt32((byte)value); break; case TypeCode.Char: generator.LoadInt32((char)value); break; case TypeCode.Double: generator.LoadDouble((double)value); break; case TypeCode.Int16: generator.LoadInt32((short)value); break; case TypeCode.Int32: generator.LoadInt32((int)value); break; case TypeCode.Int64: generator.LoadInt64((long)value); break; case TypeCode.SByte: generator.LoadInt32((sbyte)value); break; case TypeCode.Single: generator.LoadDouble((float)value); break; case TypeCode.String: generator.LoadString((string)value); break; case TypeCode.UInt16: generator.LoadInt32((ushort)value); break; case TypeCode.UInt32: generator.LoadInt32((uint)value); break; case TypeCode.UInt64: generator.LoadInt64((ulong)value); break; case TypeCode.Object: case TypeCode.Empty: case TypeCode.DateTime: case TypeCode.DBNull: case TypeCode.Decimal: throw new NotImplementedException(string.Format("Cannot emit the value '{0}'", value)); } } }
/// <summary> /// Generates CIL for the statement. /// </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) { // Generate code for the start of the statement. var statementLocals = new StatementLocals() { NonDefaultSourceSpanBehavior = true }; GenerateStartOfStatement(generator, optimizationInfo, statementLocals); // Unlike in .NET, in javascript there are no restrictions on what can appear inside // try, catch and finally blocks. The one restriction which causes problems is the // inability to jump out of .NET finally blocks. This is required when break, continue // or return statements appear inside of a finally block. To work around this, when // inside a finally block these instructions throw an exception instead. // Setting the InsideTryCatchOrFinally flag converts BR instructions into LEAVE // instructions so that the finally block is executed correctly. var previousInsideTryCatchOrFinally = optimizationInfo.InsideTryCatchOrFinally; optimizationInfo.InsideTryCatchOrFinally = true; // Finally requires two exception nested blocks. if (this.FinallyBlock != null) generator.BeginExceptionBlock(); // Begin the exception block. generator.BeginExceptionBlock(); // Generate code for the try block. this.TryBlock.GenerateCode(generator, optimizationInfo); // Generate code for the catch block. ILLocalVariable skipFinallyBlock = null; // Begin a catch block. The exception is on the top of the stack. generator.BeginCatchBlock(typeof(Exception)); // Check the exception is catchable by calling CanCatchException(ex). // We need to handle the case where JS code calls into .NET code which then throws // a JavaScriptException from a different ScriptEngine. // If CatchBlock is null, we need to rethrow the exception in every case. var endOfIfLabel = generator.CreateLabel(); generator.Duplicate(); // ex var exceptionTemporary = generator.CreateTemporaryVariable(typeof(Exception)); generator.StoreVariable(exceptionTemporary); EmitHelpers.LoadScriptEngine(generator); generator.LoadVariable(exceptionTemporary); generator.ReleaseTemporaryVariable(exceptionTemporary); generator.Call(ReflectionHelpers.ScriptEngine_CanCatchException); generator.BranchIfTrue(endOfIfLabel); if (this.FinallyBlock != null) { generator.LoadBoolean(true); skipFinallyBlock = generator.DeclareVariable(typeof(bool), "skipFinallyBlock"); generator.StoreVariable(skipFinallyBlock); } if (this.CatchBlock == null) generator.DefineLabelPosition(endOfIfLabel); generator.Rethrow(); if (this.CatchBlock != null) generator.DefineLabelPosition(endOfIfLabel); if (this.CatchBlock != null) { // Create a new DeclarativeScope. this.CatchScope.GenerateScopeCreation(generator, optimizationInfo); // Store the error object in the variable provided. generator.Call(ReflectionHelpers.JavaScriptException_ErrorObject); var catchVariable = new NameExpression(this.CatchScope, this.CatchVariableName); catchVariable.GenerateSet(generator, optimizationInfo, PrimitiveType.Any, false); // Make sure the scope is reverted even if an exception is thrown. generator.BeginExceptionBlock(); // Emit code for the statements within the catch block. this.CatchBlock.GenerateCode(generator, optimizationInfo); // Revert the scope. generator.BeginFinallyBlock(); this.CatchScope.GenerateScopeDestruction(generator, optimizationInfo); generator.EndExceptionBlock(); } // Generate code for the finally block. if (this.FinallyBlock != null) { generator.BeginFinallyBlock(); // If an exception was thrown that wasn't handled by the catch block, then don't // run the finally block either. This prevents user code from being run when a // ThreadAbortException is thrown. var endOfFinallyBlock = generator.CreateLabel(); generator.LoadVariable(skipFinallyBlock); generator.BranchIfTrue(endOfFinallyBlock); var branches = new List<ILLabel>(); var previousStackSize = optimizationInfo.LongJumpStackSizeThreshold; optimizationInfo.LongJumpStackSizeThreshold = optimizationInfo.BreakOrContinueStackSize; var previousCallback = optimizationInfo.LongJumpCallback; optimizationInfo.LongJumpCallback = (generator2, label) => { // It is not possible to branch out of a finally block - therefore instead of // generating LEAVE instructions we throw an exception then catch it to transfer // control out of the finally block. generator2.LoadInt32(branches.Count); generator2.NewObject(ReflectionHelpers.LongJumpException_Constructor); generator2.Throw(); // Record any branches that are made within the finally code. branches.Add(label); }; // Emit code for the finally block. this.FinallyBlock.GenerateCode(generator, optimizationInfo); // Define the position at the end of the finally block. generator.DefineLabelPosition(endOfFinallyBlock); // End the main exception block. generator.EndExceptionBlock(); // Begin a catch block to catch any LongJumpExceptions. The exception object is on // the top of the stack. generator.BeginCatchBlock(typeof(LongJumpException)); if (branches.Count > 0) { // switch (exception.RouteID) // { // case 0: goto label1; // case 1: goto label2; // } ILLabel[] switchLabels = new ILLabel[branches.Count]; for (int i = 0; i < branches.Count; i++) switchLabels[i] = generator.CreateLabel(); generator.Call(ReflectionHelpers.LongJumpException_RouteID); generator.Switch(switchLabels); for (int i = 0; i < branches.Count; i++) { generator.DefineLabelPosition(switchLabels[i]); generator.Leave(branches[i]); } } // Reset the state we clobbered. optimizationInfo.LongJumpStackSizeThreshold = previousStackSize; optimizationInfo.LongJumpCallback = previousCallback; } // End the exception block. generator.EndExceptionBlock(); // Reset the InsideTryCatchOrFinally flag. optimizationInfo.InsideTryCatchOrFinally = previousInsideTryCatchOrFinally; // Generate code for the end of the statement. GenerateEndOfStatement(generator, optimizationInfo, statementLocals); }
/// <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) { // Special-case the delete operator. if (this.OperatorType == OperatorType.Delete) { GenerateDelete(generator, optimizationInfo); return; } // If a return value is not expected, generate only the side-effects. /*if (optimizationInfo.SuppressReturnValue == true) { this.GenerateSideEffects(generator, optimizationInfo); return; }*/ // Special-case the typeof operator. if (this.OperatorType == OperatorType.Typeof) { GenerateTypeof(generator, optimizationInfo); return; } // Load the operand onto the stack. this.Operand.GenerateCode(generator, optimizationInfo); // Convert the operand to the correct type. switch (this.OperatorType) { case OperatorType.Plus: case OperatorType.Minus: EmitConversion.ToNumber(generator, this.Operand.ResultType); break; case OperatorType.BitwiseNot: EmitConversion.ToInt32(generator, this.Operand.ResultType); break; case OperatorType.LogicalNot: EmitConversion.ToBool(generator, this.Operand.ResultType); break; } // Apply the operator. switch (this.OperatorType) { case OperatorType.Plus: break; case OperatorType.Minus: generator.Negate(); break; case OperatorType.BitwiseNot: generator.BitwiseNot(); break; case OperatorType.LogicalNot: generator.LoadBoolean(false); generator.CompareEqual(); break; case OperatorType.Void: generator.Pop(); EmitHelpers.EmitUndefined(generator); break; default: throw new NotImplementedException(string.Format("Unsupported operator {0}", this.OperatorType)); } }
/// <summary> /// Stores the value on the top of the stack in the reference. /// </summary> /// <param name="generator"> The generator to output the CIL to. </param> /// <param name="optimizationInfo"> Information about any optimizations that should be performed. </param> /// <param name="valueType"> The primitive type of the value that is on the top of the stack. </param> /// <param name="throwIfUnresolvable"> <c>true</c> to throw a ReferenceError exception if /// the name is unresolvable; <c>false</c> to create a new property instead. </param> public void GenerateSet(ILGenerator generator, OptimizationInfo optimizationInfo, PrimitiveType valueType, bool throwIfUnresolvable) { // The value is initially on the top of the stack but is stored in this variable // at the last possible moment. ILLocalVariable value = null; var scope = this.Scope; ILLocalVariable scopeVariable = null; var endOfSet = generator.CreateLabel(); do { if (scope is DeclarativeScope) { // Get information about the variable. var variable = scope.GetDeclaredVariable(this.Name); if (variable != null) { // The variable was declared in this scope. if (scope.ExistsAtRuntime == false) { // The scope has been optimized away. The value of the variable is stored // in an ILVariable. // Declare an IL local variable if no storage location has been allocated yet. if (variable.Store == null) variable.Store = generator.DeclareVariable(typeof(object), variable.Name); if (value == null) { // The value to store is on the top of the stack - convert it to the // storage type of the variable. EmitConversion.Convert(generator, valueType, variable.Type, optimizationInfo); } else { // The value to store is in a temporary variable. generator.LoadVariable(value); EmitConversion.Convert(generator, PrimitiveType.Any, variable.Type, optimizationInfo); } // Store the value in the variable. generator.StoreVariable(variable.Store); } else if (variable.Writable == true) { if (value == null) { // The value to store is on the top of the stack - convert it to an // object and store it in a temporary variable. EmitConversion.Convert(generator, valueType, PrimitiveType.Any, optimizationInfo); value = generator.CreateTemporaryVariable(typeof(object)); generator.StoreVariable(value); } // scope.Values[index] = value if (scopeVariable == null) EmitHelpers.LoadScope(generator); else generator.LoadVariable(scopeVariable); generator.CastClass(typeof(DeclarativeScope)); generator.Call(ReflectionHelpers.DeclarativeScope_Values); generator.LoadInt32(variable.Index); generator.LoadVariable(value); generator.StoreArrayElement(typeof(object)); } else { // The variable exists, but is read-only. // Pop the value off the stack (if it is still there). if (value == null) generator.Pop(); } // The variable was found - no need to search any more parent scopes. break; } else { // The variable was not defined at compile time, but may have been // introduced by an eval() statement. if (optimizationInfo.MethodOptimizationHints.HasEval == true) { if (value == null) { // The value to store is on the top of the stack - convert it to an // object and store it in a temporary variable. EmitConversion.Convert(generator, valueType, PrimitiveType.Any, optimizationInfo); value = generator.CreateTemporaryVariable(typeof(object)); generator.StoreVariable(value); } // Check the variable exists: if (scope.HasValue(variableName) == true) { if (scopeVariable == null) EmitHelpers.LoadScope(generator); else generator.LoadVariable(scopeVariable); generator.CastClass(typeof(DeclarativeScope)); generator.LoadString(this.Name); generator.Call(ReflectionHelpers.Scope_HasValue); var hasValueClause = generator.CreateLabel(); generator.BranchIfFalse(hasValueClause); // Set the value of the variable. if (scopeVariable == null) EmitHelpers.LoadScope(generator); else generator.LoadVariable(scopeVariable); generator.CastClass(typeof(DeclarativeScope)); generator.LoadString(this.Name); generator.LoadVariable(value); generator.Call(ReflectionHelpers.Scope_SetValue); generator.Branch(endOfSet); // } generator.DefineLabelPosition(hasValueClause); } } } else { if (value == null) { // The value to store is on the top of the stack - convert it to an // object and store it in a temporary variable. EmitConversion.Convert(generator, valueType, PrimitiveType.Any, optimizationInfo); value = generator.CreateTemporaryVariable(typeof(object)); generator.StoreVariable(value); } if (scope.ParentScope == null) { // Optimization: if this is the global scope, use hidden classes to // optimize variable access. // Global variable modification // ---------------------------- // __object_cacheKey = null; // __object_property_cachedIndex = 0; // ... // if (__object_cacheKey != object.InlineCacheKey) // object.InlineSetPropertyValueIfExists("property", value, strictMode, out __object_property_cachedIndex, out __object_cacheKey) // else // object.InlinePropertyValues[__object_property_cachedIndex] = value; // Get a reference to the global object. if (scopeVariable == null) EmitHelpers.LoadScope(generator); else generator.LoadVariable(scopeVariable); generator.CastClass(typeof(ObjectScope)); generator.Call(ReflectionHelpers.ObjectScope_ScopeObject); // TODO: share these variables somehow. var cacheKey = generator.DeclareVariable(typeof(object)); var cachedIndex = generator.DeclareVariable(typeof(int)); // Store the object into a temp variable. var objectInstance = generator.DeclareVariable(PrimitiveType.Object); generator.StoreVariable(objectInstance); // if (__object_cacheKey != object.InlineCacheKey) generator.LoadVariable(cacheKey); generator.LoadVariable(objectInstance); generator.Call(ReflectionHelpers.ObjectInstance_InlineCacheKey); var elseClause = generator.CreateLabel(); generator.BranchIfEqual(elseClause); // xxx = object.InlineSetPropertyValueIfExists("property", value, strictMode, out __object_property_cachedIndex, out __object_cacheKey) generator.LoadVariable(objectInstance); generator.LoadString(this.Name); generator.LoadVariable(value); generator.LoadBoolean(optimizationInfo.StrictMode); generator.LoadAddressOfVariable(cachedIndex); generator.LoadAddressOfVariable(cacheKey); if (throwIfUnresolvable == false) { // Set the property value unconditionally. generator.Call(ReflectionHelpers.ObjectInstance_InlineSetPropertyValue); } else { // Set the property value if the property exists. generator.Call(ReflectionHelpers.ObjectInstance_InlineSetPropertyValueIfExists); // The return value is true if the property was defined, and false if it wasn't. generator.BranchIfTrue(endOfSet); } var endOfIf = generator.CreateLabel(); generator.Branch(endOfIf); // else generator.DefineLabelPosition(elseClause); // object.InlinePropertyValues[__object_property_cachedIndex] = value; generator.LoadVariable(objectInstance); generator.Call(ReflectionHelpers.ObjectInstance_InlinePropertyValues); generator.LoadVariable(cachedIndex); generator.LoadVariable(value); generator.StoreArrayElement(typeof(object)); generator.Branch(endOfSet); // End of the if statement generator.DefineLabelPosition(endOfIf); } else { // Slow route. if (scopeVariable == null) EmitHelpers.LoadScope(generator); else generator.LoadVariable(scopeVariable); generator.CastClass(typeof(ObjectScope)); generator.Call(ReflectionHelpers.ObjectScope_ScopeObject); generator.LoadString(this.Name); generator.LoadVariable(value); generator.LoadBoolean(optimizationInfo.StrictMode); if (scope.ParentScope == null && throwIfUnresolvable == false) { // Set the property value unconditionally. generator.Call(ReflectionHelpers.ObjectInstance_SetPropertyValue_Object); } else { // Set the property value if the property exists. generator.Call(ReflectionHelpers.ObjectInstance_SetPropertyValueIfExists); // The return value is true if the property was defined, and false if it wasn't. generator.BranchIfTrue(endOfSet); } } } // Try the parent scope. if (scope.ParentScope != null && scope.ExistsAtRuntime == true) { if (scopeVariable == null) { scopeVariable = generator.CreateTemporaryVariable(typeof(Scope)); EmitHelpers.LoadScope(generator); } else { generator.LoadVariable(scopeVariable); } generator.Call(ReflectionHelpers.Scope_ParentScope); generator.StoreVariable(scopeVariable); } scope = scope.ParentScope; } while (scope != null); // The value might be still on top of the stack. if (value == null && scope == null) generator.Pop(); // Throw an error if the name does not exist and throwIfUnresolvable is true. if (scope == null && throwIfUnresolvable == true) EmitHelpers.EmitThrow(generator, ErrorType.ReferenceError, this.Name + " is not defined", optimizationInfo); // Release the temporary variables. if (value != null) generator.ReleaseTemporaryVariable(value); if (scopeVariable != null) generator.ReleaseTemporaryVariable(scopeVariable); // Define a label at the end. generator.DefineLabelPosition(endOfSet); }
/// <summary> /// Generates code that creates a new scope. /// </summary> /// <param name="generator"> The generator to output the CIL to. </param> /// <param name="optimizationInfo"> Information about any optimizations that should be performed. </param> internal override void GenerateScopeCreation(ILGenerator generator, OptimizationInfo optimizationInfo) { // Create a new runtime object scope. EmitHelpers.LoadScope(generator); // parent scope if (this.ScopeObjectExpression == null) { EmitHelpers.LoadScriptEngine(generator); generator.Call(ReflectionHelpers.ScriptEngine_Global); } else { this.ScopeObjectExpression.GenerateCode(generator, optimizationInfo); EmitConversion.ToObject(generator, this.ScopeObjectExpression.ResultType); } generator.LoadBoolean(this.ProvidesImplicitThisValue); generator.LoadBoolean(this.CanDeclareVariables); generator.Call(ReflectionHelpers.ObjectScope_CreateRuntimeScope); // Save the new scope. EmitHelpers.StoreScope(generator); }
/// <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) { // Generate a new method. this.context.GenerateCode(); // Add the generated method to the nested function list. if (optimizationInfo.NestedFunctions == null) { optimizationInfo.NestedFunctions = new List <GeneratedMethod>(); } optimizationInfo.NestedFunctions.Add(this.context.GeneratedMethod); // Add all the nested methods to the parent list. if (this.context.GeneratedMethod.Dependencies != null) { foreach (var nestedFunctionExpression in this.context.GeneratedMethod.Dependencies) { optimizationInfo.NestedFunctions.Add(nestedFunctionExpression); } } // Store the generated method in the cache. long generatedMethodID = GeneratedMethod.Save(this.context.GeneratedMethod); // Create a UserDefinedFunction. // prototype EmitHelpers.LoadScriptEngine(generator); generator.Call(ReflectionHelpers.ScriptEngine_Function); generator.Call(ReflectionHelpers.FunctionInstance_InstancePrototype); // name if (this.context.DeclarationType == FunctionDeclarationType.Getter) { generator.LoadString("get " + this.FunctionName); } else if (this.context.DeclarationType == FunctionDeclarationType.Setter) { generator.LoadString("set " + this.FunctionName); } else { generator.LoadString(this.FunctionName); } // argumentNames generator.LoadInt32(this.Arguments.Count); generator.NewArray(typeof(string)); for (int i = 0; i < this.Arguments.Count; i++) { generator.Duplicate(); generator.LoadInt32(i); generator.LoadString(this.Arguments[i].Name); generator.StoreArrayElement(typeof(string)); } // scope EmitHelpers.LoadScope(generator); // bodyText generator.LoadString(this.BodyText); // body generator.LoadInt64(generatedMethodID); generator.Call(ReflectionHelpers.GeneratedMethod_Load); // strictMode generator.LoadBoolean(this.context.StrictMode); // new UserDefinedFunction(ObjectInstance prototype, string name, IList<string> argumentNames, DeclarativeScope scope, Func<Scope, object, object[], object> body, bool strictMode) generator.NewObject(ReflectionHelpers.UserDefinedFunction_Constructor); }
/// <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) { // Literals cannot have side-effects so if a return value is not expected then generate // nothing. //if (optimizationInfo.SuppressReturnValue == true) // return; if (this.Value is int) generator.LoadInt32((int)this.Value); else if (this.Value is double) generator.LoadDouble((double)this.Value); else if (this.Value is string) generator.LoadString((string)this.Value); else if (this.Value is bool) generator.LoadBoolean((bool)this.Value); else if (this.Value is RegularExpressionLiteral) { // RegExp var sharedRegExpVariable = optimizationInfo.GetRegExpVariable(generator, (RegularExpressionLiteral)this.Value); var label1 = generator.CreateLabel(); var label2 = generator.CreateLabel(); // if (sharedRegExp == null) { generator.LoadVariable(sharedRegExpVariable); generator.LoadNull(); generator.BranchIfNotEqual(label1); // sharedRegExp = Global.RegExp.Construct(source, flags) EmitHelpers.LoadScriptEngine(generator); generator.Call(ReflectionHelpers.ScriptEngine_RegExp); generator.LoadString(((RegularExpressionLiteral)this.Value).Pattern); generator.LoadString(((RegularExpressionLiteral)this.Value).Flags); generator.Call(ReflectionHelpers.RegExp_Construct); generator.Duplicate(); generator.StoreVariable(sharedRegExpVariable); // } else { generator.Branch(label2); generator.DefineLabelPosition(label1); // Global.RegExp.Construct(sharedRegExp, flags) EmitHelpers.LoadScriptEngine(generator); generator.Call(ReflectionHelpers.ScriptEngine_RegExp); generator.LoadVariable(sharedRegExpVariable); generator.LoadNull(); generator.Call(ReflectionHelpers.RegExp_Construct); // } generator.DefineLabelPosition(label2); } else if (this.Value == Null.Value) { // Null. EmitHelpers.EmitNull(generator); } else if (this.Value == Undefined.Value) { // Undefined. EmitHelpers.EmitUndefined(generator); } else if (this.Value is List<Expression>) { // Construct an array literal. var arrayLiteral = (List<Expression>)this.Value; // Operands for ArrayConstructor.New() are: an ArrayConstructor instance (ArrayConstructor), an array (object[]) // ArrayConstructor EmitHelpers.LoadScriptEngine(generator); generator.Call(ReflectionHelpers.ScriptEngine_Array); // object[] generator.LoadInt32(arrayLiteral.Count); generator.NewArray(typeof(object)); for (int i = 0; i < arrayLiteral.Count; i ++) { // Operands for StoreArrayElement() are: an array (object[]), index (int), value (object). // Array generator.Duplicate(); // Index generator.LoadInt32(i); // Value var elementExpression = arrayLiteral[i]; if (elementExpression == null) generator.LoadNull(); else { elementExpression.GenerateCode(generator, optimizationInfo); EmitConversion.ToAny(generator, elementExpression.ResultType); } // Store the element value. generator.StoreArrayElement(typeof(object)); } // ArrayConstructor.New(object[]) generator.Call(ReflectionHelpers.Array_New); } else if (this.Value is List<KeyValuePair<Expression, Expression>>) { // This is an object literal. var properties = (List<KeyValuePair<Expression, Expression>>)this.Value; // Create a new object. EmitHelpers.LoadScriptEngine(generator); generator.Call(ReflectionHelpers.ScriptEngine_Object); generator.Call(ReflectionHelpers.Object_Construct); foreach (var keyValuePair in properties) { Expression propertyName = keyValuePair.Key; Expression propertyValue = keyValuePair.Value; generator.Duplicate(); // The key can be a property name or an expression that evaluates to a name. propertyName.GenerateCode(generator, optimizationInfo); EmitConversion.ToPropertyKey(generator, propertyName.ResultType); var functionValue = propertyValue as FunctionExpression; if (functionValue != null && functionValue.DeclarationType == FunctionDeclarationType.Getter) { // Add a getter to the object. functionValue.GenerateCode(generator, optimizationInfo); // Support the inferred function displayName property. if (propertyName is LiteralExpression && ((LiteralExpression)propertyName).Value is string) functionValue.GenerateDisplayName(generator, optimizationInfo, "get " + (string)((LiteralExpression)propertyName).Value, true); generator.Call(ReflectionHelpers.ReflectionHelpers_SetObjectLiteralGetter); } else if(functionValue != null && functionValue.DeclarationType == FunctionDeclarationType.Setter) { // Add a setter to the object. functionValue.GenerateCode(generator, optimizationInfo); // Support the inferred function displayName property. if (propertyName is LiteralExpression && ((LiteralExpression)propertyName).Value is string) functionValue.GenerateDisplayName(generator, optimizationInfo, "set " + (string)((LiteralExpression)propertyName).Value, true); generator.Call(ReflectionHelpers.ReflectionHelpers_SetObjectLiteralSetter); } else { // Add a new property to the object. propertyValue.GenerateCode(generator, optimizationInfo); // Support the inferred function displayName property. if (propertyValue is FunctionExpression && propertyName is LiteralExpression && ((LiteralExpression)propertyName).Value is string) ((FunctionExpression)propertyValue).GenerateDisplayName(generator, optimizationInfo, (string)((LiteralExpression)propertyName).Value, false); EmitConversion.ToAny(generator, propertyValue.ResultType); generator.Call(ReflectionHelpers.ReflectionHelpers_SetObjectLiteralValue); } } } else throw new NotImplementedException("Unknown literal type."); }