| // Copyright (c) 2018, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| /// All classes in this file are temporary. Each class should be split in two: |
| /// |
| /// 1. A common superclass. |
| /// 2. A kernel-specific implementation class. |
| /// |
| /// The common superclass should keep the name of the class and be moved to |
| /// [expression_generator.dart]. The kernel-specific class should be moved to |
| /// [kernel_expression_generator.dart] and we can eventually delete this file. |
| /// |
| /// Take a look at [VariableUseGenerator] for an example of how the common |
| /// superclass should use the forest API in a factory method. |
| part of 'kernel_expression_generator.dart'; |
| |
| class ThisAccessGenerator extends KernelGenerator { |
| final bool isInitializer; |
| final bool inFieldInitializer; |
| |
| final bool isSuper; |
| |
| ThisAccessGenerator(ExpressionGeneratorHelper helper, Token token, |
| this.isInitializer, this.inFieldInitializer, |
| {this.isSuper: false}) |
| : super(helper, token); |
| |
| String get plainNameForRead { |
| return unsupported("${isSuper ? 'super' : 'this'}.plainNameForRead", |
| offsetForToken(token), uri); |
| } |
| |
| String get debugName => "ThisAccessGenerator"; |
| |
| Expression buildSimpleRead() { |
| if (!isSuper) { |
| if (inFieldInitializer) { |
| return buildFieldInitializerError(null); |
| } else { |
| return forest.thisExpression(token); |
| } |
| } else { |
| return helper.buildProblem(messageSuperAsExpression, |
| offsetForToken(token), lengthForToken(token)); |
| } |
| } |
| |
| Expression buildFieldInitializerError(Map<String, int> initializedFields) { |
| String keyword = isSuper ? "super" : "this"; |
| return helper.buildProblem( |
| templateThisOrSuperAccessInFieldInitializer.withArguments(keyword), |
| offsetForToken(token), |
| keyword.length); |
| } |
| |
| @override |
| Initializer buildFieldInitializer(Map<String, int> initializedFields) { |
| Expression error = helper.desugarSyntheticExpression( |
| buildFieldInitializerError(initializedFields)); |
| return helper.buildInvalidInitializer(error, error.fileOffset); |
| } |
| |
| buildPropertyAccess( |
| IncompleteSendGenerator send, int operatorOffset, bool isNullAware) { |
| Name name = send.name; |
| Arguments arguments = send.arguments; |
| int offset = offsetForToken(send.token); |
| if (isInitializer && send is SendAccessGenerator) { |
| if (isNullAware) { |
| helper.addProblem( |
| messageInvalidUseOfNullAwareAccess, operatorOffset, 2); |
| } |
| return buildConstructorInitializer(offset, name, arguments); |
| } |
| if (inFieldInitializer && !isInitializer) { |
| return buildFieldInitializerError(null); |
| } |
| Member getter = helper.lookupInstanceMember(name, isSuper: isSuper); |
| if (send is SendAccessGenerator) { |
| // Notice that 'this' or 'super' can't be null. So we can ignore the |
| // value of [isNullAware]. |
| if (getter == null) { |
| helper.warnUnresolvedMethod(name, offsetForToken(send.token), |
| isSuper: isSuper); |
| } |
| return helper.buildMethodInvocation(forest.thisExpression(null), name, |
| send.arguments, offsetForToken(send.token), |
| isSuper: isSuper, interfaceTarget: getter); |
| } else { |
| Member setter = |
| helper.lookupInstanceMember(name, isSuper: isSuper, isSetter: true); |
| if (isSuper) { |
| return new SuperPropertyAccessGenerator( |
| helper, |
| // TODO(ahe): This is not the 'super' token. |
| send.token, |
| name, |
| getter, |
| setter); |
| } else { |
| return new ThisPropertyAccessGenerator( |
| helper, |
| // TODO(ahe): This is not the 'this' token. |
| send.token, |
| name, |
| getter, |
| setter); |
| } |
| } |
| } |
| |
| doInvocation(int offset, Arguments arguments) { |
| if (isInitializer) { |
| return buildConstructorInitializer(offset, new Name(""), arguments); |
| } else if (isSuper) { |
| return helper.buildProblem(messageSuperAsExpression, offset, noLength); |
| } else { |
| return helper.buildMethodInvocation( |
| forest.thisExpression(null), callName, arguments, offset, |
| isImplicitCall: true); |
| } |
| } |
| |
| Initializer buildConstructorInitializer( |
| int offset, Name name, Arguments arguments) { |
| Constructor constructor = helper.lookupConstructor(name, isSuper: isSuper); |
| LocatedMessage message; |
| if (constructor != null) { |
| message = helper.checkArgumentsForFunction( |
| constructor.function, arguments, offset, <TypeParameter>[]); |
| } else { |
| String fullName = |
| helper.constructorNameForDiagnostics(name.name, isSuper: isSuper); |
| message = (isSuper |
| ? templateSuperclassHasNoConstructor |
| : templateConstructorNotFound) |
| .withArguments(fullName) |
| .withLocation(uri, offsetForToken(token), lengthForToken(token)); |
| } |
| if (message != null) { |
| return helper.buildInvalidInitializer(helper.wrapSyntheticExpression( |
| helper.throwNoSuchMethodError( |
| forest.literalNull(null)..fileOffset = offset, |
| helper.constructorNameForDiagnostics(name.name, isSuper: isSuper), |
| arguments, |
| offset, |
| isSuper: isSuper, |
| message: message), |
| offset)); |
| } else if (isSuper) { |
| return helper.buildSuperInitializer( |
| false, constructor, arguments, offset); |
| } else { |
| return helper.buildRedirectingInitializer(constructor, arguments, offset); |
| } |
| } |
| |
| Expression buildAssignment(Expression value, {bool voidContext: false}) { |
| return buildAssignmentError(); |
| } |
| |
| Expression buildNullAwareAssignment( |
| Expression value, DartType type, int offset, |
| {bool voidContext: false}) { |
| return buildAssignmentError(); |
| } |
| |
| Expression buildCompoundAssignment(Name binaryOperator, Expression value, |
| {int offset: TreeNode.noOffset, |
| bool voidContext: false, |
| Procedure interfaceTarget, |
| bool isPreIncDec: false, |
| bool isPostIncDec: false}) { |
| return buildAssignmentError(); |
| } |
| |
| Expression buildPrefixIncrement(Name binaryOperator, |
| {int offset: TreeNode.noOffset, |
| bool voidContext: false, |
| Procedure interfaceTarget}) { |
| return buildAssignmentError(); |
| } |
| |
| Expression buildPostfixIncrement(Name binaryOperator, |
| {int offset: TreeNode.noOffset, |
| bool voidContext: false, |
| Procedure interfaceTarget}) { |
| return buildAssignmentError(); |
| } |
| |
| Expression buildAssignmentError() { |
| return helper.desugarSyntheticExpression(helper.buildProblem( |
| isSuper ? messageCannotAssignToSuper : messageNotAnLvalue, |
| offsetForToken(token), |
| token.length)); |
| } |
| |
| @override |
| void printOn(StringSink sink) { |
| sink.write(", isInitializer: "); |
| sink.write(isInitializer); |
| sink.write(", isSuper: "); |
| sink.write(isSuper); |
| } |
| } |
| |
| abstract class IncompleteSendGenerator extends KernelGenerator { |
| final Name name; |
| |
| IncompleteSendGenerator( |
| ExpressionGeneratorHelper helper, Token token, this.name) |
| : super(helper, token); |
| |
| withReceiver(Object receiver, int operatorOffset, {bool isNullAware}); |
| |
| Arguments get arguments => null; |
| |
| @override |
| void printOn(StringSink sink) { |
| sink.write(", name: "); |
| sink.write(name.name); |
| } |
| } |
| |
| class IncompleteErrorGenerator extends IncompleteSendGenerator |
| with ErroneousExpressionGenerator { |
| final Message message; |
| |
| IncompleteErrorGenerator( |
| ExpressionGeneratorHelper helper, Token token, this.message) |
| : super(helper, token, null); |
| |
| String get plainNameForRead => token.lexeme; |
| |
| String get debugName => "IncompleteErrorGenerator"; |
| |
| @override |
| Expression buildError(Arguments arguments, |
| {bool isGetter: false, bool isSetter: false, int offset}) { |
| int length = noLength; |
| if (offset == null) { |
| offset = offsetForToken(token); |
| length = lengthForToken(token); |
| } |
| return helper.buildProblem(message, offset, length); |
| } |
| |
| @override |
| doInvocation(int offset, Arguments arguments) => this; |
| |
| @override |
| Expression buildSimpleRead() { |
| return buildError(forest.argumentsEmpty(token), isGetter: true) |
| ..fileOffset = offsetForToken(token); |
| } |
| |
| @override |
| void printOn(StringSink sink) { |
| sink.write(", message: "); |
| sink.write(message.code.name); |
| } |
| } |
| |
| // TODO(ahe): Rename to SendGenerator. |
| class SendAccessGenerator extends IncompleteSendGenerator { |
| @override |
| final Arguments arguments; |
| |
| SendAccessGenerator( |
| ExpressionGeneratorHelper helper, Token token, Name name, this.arguments) |
| : super(helper, token, name) { |
| assert(arguments != null); |
| } |
| |
| String get plainNameForRead => name.name; |
| |
| String get debugName => "SendAccessGenerator"; |
| |
| Expression buildSimpleRead() { |
| return unsupported("buildSimpleRead", offsetForToken(token), uri); |
| } |
| |
| Expression buildAssignment(Expression value, {bool voidContext: false}) { |
| return unsupported("buildAssignment", offsetForToken(token), uri); |
| } |
| |
| withReceiver(Object receiver, int operatorOffset, {bool isNullAware: false}) { |
| if (receiver is Generator) { |
| return receiver.buildPropertyAccess(this, operatorOffset, isNullAware); |
| } |
| return helper.buildMethodInvocation( |
| helper.toValue(receiver), name, arguments, offsetForToken(token), |
| isNullAware: isNullAware); |
| } |
| |
| Expression buildNullAwareAssignment( |
| Expression value, DartType type, int offset, |
| {bool voidContext: false}) { |
| return unsupported("buildNullAwareAssignment", offset, uri); |
| } |
| |
| Expression buildCompoundAssignment(Name binaryOperator, Expression value, |
| {int offset: TreeNode.noOffset, |
| bool voidContext: false, |
| Procedure interfaceTarget, |
| bool isPreIncDec: false, |
| bool isPostIncDec: false}) { |
| return unsupported( |
| "buildCompoundAssignment", offset ?? offsetForToken(token), uri); |
| } |
| |
| Expression buildPrefixIncrement(Name binaryOperator, |
| {int offset: TreeNode.noOffset, |
| bool voidContext: false, |
| Procedure interfaceTarget}) { |
| return unsupported( |
| "buildPrefixIncrement", offset ?? offsetForToken(token), uri); |
| } |
| |
| Expression buildPostfixIncrement(Name binaryOperator, |
| {int offset: TreeNode.noOffset, |
| bool voidContext: false, |
| Procedure interfaceTarget}) { |
| return unsupported( |
| "buildPostfixIncrement", offset ?? offsetForToken(token), uri); |
| } |
| |
| Expression doInvocation(int offset, Arguments arguments) { |
| return unsupported("doInvocation", offset, uri); |
| } |
| |
| @override |
| void printOn(StringSink sink) { |
| super.printOn(sink); |
| sink.write(", arguments: "); |
| var node = arguments; |
| if (node is Node) { |
| printNodeOn(node, sink); |
| } else { |
| sink.write(node); |
| } |
| } |
| } |
| |
| class IncompletePropertyAccessGenerator extends IncompleteSendGenerator { |
| IncompletePropertyAccessGenerator( |
| ExpressionGeneratorHelper helper, Token token, Name name) |
| : super(helper, token, name); |
| |
| String get plainNameForRead => name.name; |
| |
| String get debugName => "IncompletePropertyAccessGenerator"; |
| |
| Expression buildSimpleRead() { |
| return unsupported("buildSimpleRead", offsetForToken(token), uri); |
| } |
| |
| Expression buildAssignment(Expression value, {bool voidContext: false}) { |
| return unsupported("buildAssignment", offsetForToken(token), uri); |
| } |
| |
| withReceiver(Object receiver, int operatorOffset, {bool isNullAware: false}) { |
| if (receiver is Generator) { |
| return receiver.buildPropertyAccess(this, operatorOffset, isNullAware); |
| } |
| return PropertyAccessGenerator.make( |
| helper, token, helper.toValue(receiver), name, null, null, isNullAware); |
| } |
| |
| Expression buildNullAwareAssignment( |
| Expression value, DartType type, int offset, |
| {bool voidContext: false}) { |
| return unsupported("buildNullAwareAssignment", offset, uri); |
| } |
| |
| Expression buildCompoundAssignment(Name binaryOperator, Expression value, |
| {int offset: TreeNode.noOffset, |
| bool voidContext: false, |
| Procedure interfaceTarget, |
| bool isPreIncDec: false, |
| bool isPostIncDec: false}) { |
| return unsupported( |
| "buildCompoundAssignment", offset ?? offsetForToken(token), uri); |
| } |
| |
| Expression buildPrefixIncrement(Name binaryOperator, |
| {int offset: TreeNode.noOffset, |
| bool voidContext: false, |
| Procedure interfaceTarget}) { |
| return unsupported( |
| "buildPrefixIncrement", offset ?? offsetForToken(token), uri); |
| } |
| |
| Expression buildPostfixIncrement(Name binaryOperator, |
| {int offset: TreeNode.noOffset, |
| bool voidContext: false, |
| Procedure interfaceTarget}) { |
| return unsupported( |
| "buildPostfixIncrement", offset ?? offsetForToken(token), uri); |
| } |
| |
| Expression doInvocation(int offset, Arguments arguments) { |
| return unsupported("doInvocation", offset, uri); |
| } |
| } |
| |
| class ParenthesizedExpressionGenerator extends KernelReadOnlyAccessGenerator { |
| ParenthesizedExpressionGenerator( |
| ExpressionGeneratorHelper helper, Token token, Expression expression) |
| : super(helper, token, expression, null); |
| |
| String get debugName => "ParenthesizedExpressionGenerator"; |
| |
| @override |
| ComplexAssignmentJudgment startComplexAssignment(Expression rhs) { |
| return shadow.SyntheticWrapper.wrapIllegalAssignment(rhs, |
| assignmentOffset: offsetForToken(token)); |
| } |
| |
| Expression makeInvalidWrite(Expression value) { |
| return helper.wrapInvalidWrite( |
| helper.desugarSyntheticExpression(helper.buildProblem( |
| messageCannotAssignToParenthesizedExpression, |
| offsetForToken(token), |
| lengthForToken(token))), |
| expression, |
| offsetForToken(token)); |
| } |
| } |