lrn@google.com
9010ea745c
This is expected to be added to the language specification, for allowing the specification of methods with externally bound implementations. Review URL: https://chromiumcodereview.appspot.com//10697096 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@9456 260f80e4-7a28-3924-810f-c04153c831b5
1755 lines
49 KiB
Dart
1755 lines
49 KiB
Dart
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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interface Visitor<R> {
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R visitBlock(Block node);
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R visitBreakStatement(BreakStatement node);
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R visitCascade(Cascade node);
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R visitCascadeReceiver(CascadeReceiver node);
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R visitCaseMatch(CaseMatch node);
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R visitCatchBlock(CatchBlock node);
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R visitClassNode(ClassNode node);
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R visitConditional(Conditional node);
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R visitContinueStatement(ContinueStatement node);
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R visitDoWhile(DoWhile node);
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R visitEmptyStatement(EmptyStatement node);
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R visitExpressionStatement(ExpressionStatement node);
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R visitFor(For node);
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R visitForIn(ForIn node);
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R visitFunctionDeclaration(FunctionDeclaration node);
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R visitFunctionExpression(FunctionExpression node);
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R visitIdentifier(Identifier node);
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R visitIf(If node);
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R visitLabel(Label node);
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R visitLabeledStatement(LabeledStatement node);
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R visitLiteralBool(LiteralBool node);
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R visitLiteralDouble(LiteralDouble node);
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R visitLiteralInt(LiteralInt node);
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R visitLiteralList(LiteralList node);
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R visitLiteralMap(LiteralMap node);
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R visitLiteralMapEntry(LiteralMapEntry node);
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R visitLiteralNull(LiteralNull node);
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R visitLiteralString(LiteralString node);
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R visitModifiers(Modifiers node);
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R visitNamedArgument(NamedArgument node);
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R visitNewExpression(NewExpression node);
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R visitNodeList(NodeList node);
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R visitOperator(Operator node);
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R visitParenthesizedExpression(ParenthesizedExpression node);
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R visitReturn(Return node);
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R visitScriptTag(ScriptTag node);
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R visitSend(Send node);
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R visitSendSet(SendSet node);
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R visitStringInterpolation(StringInterpolation node);
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R visitStringInterpolationPart(StringInterpolationPart node);
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R visitStringJuxtaposition(StringJuxtaposition node);
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R visitSwitchCase(SwitchCase node);
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R visitSwitchStatement(SwitchStatement node);
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R visitThrow(Throw node);
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R visitTryStatement(TryStatement node);
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R visitTypeAnnotation(TypeAnnotation node);
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R visitTypedef(Typedef node);
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R visitTypeVariable(TypeVariable node);
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R visitVariableDefinitions(VariableDefinitions node);
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R visitWhile(While node);
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}
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Token firstBeginToken(Node first, Node second) {
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Token token = null;
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if (first !== null) {
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token = first.getBeginToken();
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}
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if (token === null && second !== null) {
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// [token] might be null even when [first] is not, e.g. for empty Modifiers.
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token = second.getBeginToken();
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}
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return token;
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}
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class NodeAssertionFailure implements Exception {
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final Node node;
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final String message;
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NodeAssertionFailure(this.node, this.message);
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}
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/**
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* A node in a syntax tree.
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*
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* The abstract part of "abstract syntax tree" is invalidated when
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* supporting tools such as code formatting. These tools need concrete
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* syntax such as parentheses and no constant folding.
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*
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* We support these tools by storing additional references back to the
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* token stream. These references are stored in fields ending with
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* "Token".
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*/
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class Node implements Hashable {
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final int _hashCode;
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static int _HASH_COUNTER = 0;
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Node() : _hashCode = ++_HASH_COUNTER;
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hashCode() => _hashCode;
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abstract accept(Visitor visitor);
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abstract visitChildren(Visitor visitor);
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/**
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* Returns this node unparsed to Dart source string.
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*/
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toString() => unparse();
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/**
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* Returns Xml-like tree representation of this node.
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*/
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toDebugString() {
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return PrettyPrinter.prettyPrint(this);
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}
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String getObjectDescription() => super.toString();
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String unparse() {
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Unparser unparser = new Unparser();
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try {
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return unparser.unparse(this);
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} catch (var e, var trace) {
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print(trace);
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return '<<unparse error: ${getObjectDescription()}: ${unparser.sb}>>';
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}
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}
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abstract Token getBeginToken();
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abstract Token getEndToken();
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Block asBlock() => null;
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BreakStatement asBreakStatement() => null;
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Cascade asCascade() => null;
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CascadeReceiver asCascadeReceiver() => null;
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CaseMatch asCaseMatch() => null;
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CatchBlock asCatchBlock() => null;
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ClassNode asClassNode() => null;
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Conditional asConditional() => null;
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ContinueStatement asContinueStatement() => null;
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DoWhile asDoWhile() => null;
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EmptyStatement asEmptyStatement() => null;
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Expression asExpression() => null;
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ExpressionStatement asExpressionStatement() => null;
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For asFor() => null;
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ForIn asForIn() => null;
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FunctionDeclaration asFunctionDeclaration() => null;
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FunctionExpression asFunctionExpression() => null;
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Identifier asIdentifier() => null;
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If asIf() => null;
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Label asLabel() => null;
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LabeledStatement asLabeledStatement() => null;
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LiteralBool asLiteralBool() => null;
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LiteralDouble asLiteralDouble() => null;
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LiteralInt asLiteralInt() => null;
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LiteralList asLiteralList() => null;
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LiteralMap asLiteralMap() => null;
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LiteralMapEntry asLiteralMapEntry() => null;
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LiteralNull asLiteralNull() => null;
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LiteralString asLiteralString() => null;
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Modifiers asModifiers() => null;
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NamedArgument asNamedArgument() => null;
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NodeList asNodeList() => null;
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Operator asOperator() => null;
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ParenthesizedExpression asParenthesizedExpression() => null;
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Return asReturn() => null;
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ScriptTag asScriptTag() => null;
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Send asSend() => null;
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SendSet asSendSet() => null;
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Statement asStatement() => null;
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StringNode asStringNode() => null;
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StringInterpolation asStringInterpolation() => null;
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StringInterpolationPart asStringInterpolationPart() => null;
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StringJuxtaposition asStringJuxtaposition() => null;
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SwitchCase asSwitchCase() => null;
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SwitchStatement asSwitchStatement() => null;
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Throw asThrow() => null;
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TryStatement asTryStatement() => null;
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TypeAnnotation asTypeAnnotation() => null;
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Typedef asTypedef() => null;
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TypeVariable asTypeVariable() => null;
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VariableDefinitions asVariableDefinitions() => null;
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While asWhile() => null;
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bool isValidBreakTarget() => false;
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bool isValidContinueTarget() => false;
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}
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class ClassNode extends Node {
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final Identifier name;
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final TypeAnnotation superclass;
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final NodeList interfaces;
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final NodeList typeParameters;
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// TODO(ahe, karlklose): the default keyword is not recorded.
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final TypeAnnotation defaultClause;
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final Token beginToken;
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final Token extendsKeyword;
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final Token endToken;
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ClassNode(this.name, this.typeParameters, this.superclass, this.interfaces,
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this.defaultClause, this.beginToken, this.extendsKeyword,
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this.endToken);
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ClassNode asClassNode() => this;
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accept(Visitor visitor) => visitor.visitClassNode(this);
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visitChildren(Visitor visitor) {
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if (name !== null) name.accept(visitor);
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if (superclass !== null) superclass.accept(visitor);
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if (interfaces !== null) interfaces.accept(visitor);
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}
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bool get isInterface() => beginToken.stringValue === 'interface';
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bool get isClass() => !isInterface;
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Token getBeginToken() => beginToken;
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Token getEndToken() => endToken;
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}
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class Expression extends Node {
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Expression();
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Expression asExpression() => this;
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// TODO(ahe): make class abstract instead of adding an abstract method.
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abstract accept(Visitor visitor);
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}
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class Statement extends Node {
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Statement();
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Statement asStatement() => this;
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// TODO(ahe): make class abstract instead of adding an abstract method.
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abstract accept(Visitor visitor);
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bool isValidBreakTarget() => true;
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}
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/**
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* A message send aka method invocation. In Dart, most operations can
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* (and should) be considered as message sends. Getters and setters
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* are just methods with a special syntax. Consequently, we model
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* property access, assignment, operators, and method calls with this
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* one node.
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*/
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class Send extends Expression {
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final Node receiver;
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final Node selector;
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final NodeList argumentsNode;
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Link<Node> get arguments() => argumentsNode.nodes;
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Send([this.receiver, this.selector, this.argumentsNode]);
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Send.postfix(this.receiver, this.selector, [Node argument = null])
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: argumentsNode = (argument === null)
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? new Postfix()
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: new Postfix.singleton(argument);
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Send.prefix(this.receiver, this.selector, [Node argument = null])
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: argumentsNode = (argument === null)
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? new Prefix()
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: new Prefix.singleton(argument);
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Send asSend() => this;
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accept(Visitor visitor) => visitor.visitSend(this);
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visitChildren(Visitor visitor) {
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if (receiver !== null) receiver.accept(visitor);
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if (selector !== null) selector.accept(visitor);
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if (argumentsNode !== null) argumentsNode.accept(visitor);
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}
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int argumentCount() => (argumentsNode === null) ? -1 : argumentsNode.length();
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bool get isSuperCall() {
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return receiver !== null &&
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receiver.asIdentifier() !== null &&
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receiver.asIdentifier().isSuper();
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}
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bool get isOperator() => selector is Operator;
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bool get isPropertyAccess() => argumentsNode === null;
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bool get isFunctionObjectInvocation() => selector === null;
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bool get isPrefix() => argumentsNode is Prefix;
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bool get isPostfix() => argumentsNode is Postfix;
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bool get isIndex() =>
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isOperator && selector.asOperator().source.stringValue === '[]';
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bool get isCall() => !isOperator && !isPropertyAccess;
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Token getBeginToken() {
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if (isPrefix && !isIndex) return selector.getBeginToken();
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return firstBeginToken(receiver, selector);
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}
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Token getEndToken() {
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if (isPrefix) {
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if (receiver !== null) return receiver.getEndToken();
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if (selector !== null) return selector.getEndToken();
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return null;
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}
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if (!isPostfix && argumentsNode !== null) {
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return argumentsNode.getEndToken();
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}
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if (selector !== null) return selector.getEndToken();
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return receiver.getBeginToken();
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}
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Send copyWithReceiver(Node newReceiver) {
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assert(receiver === null);
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return new Send(newReceiver, selector, argumentsNode);
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}
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}
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class Postfix extends NodeList {
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Postfix() : super(nodes: const EmptyLink<Node>());
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Postfix.singleton(Node argument) : super.singleton(argument);
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}
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class Prefix extends NodeList {
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Prefix() : super(nodes: const EmptyLink<Node>());
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Prefix.singleton(Node argument) : super.singleton(argument);
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}
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class SendSet extends Send {
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final Operator assignmentOperator;
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SendSet(receiver, selector, this.assignmentOperator, argumentsNode)
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: super(receiver, selector, argumentsNode);
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SendSet.postfix(receiver,
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selector,
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this.assignmentOperator,
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[Node argument = null])
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: super.postfix(receiver, selector, argument);
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SendSet.prefix(receiver,
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selector,
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this.assignmentOperator,
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[Node argument = null])
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: super.prefix(receiver, selector, argument);
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SendSet asSendSet() => this;
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accept(Visitor visitor) => visitor.visitSendSet(this);
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visitChildren(Visitor visitor) {
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super.visitChildren(visitor);
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if (assignmentOperator !== null) assignmentOperator.accept(visitor);
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}
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Send copyWithReceiver(Node newReceiver) {
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assert(receiver === null);
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return new SendSet(newReceiver, selector, assignmentOperator,
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argumentsNode);
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}
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Token getBeginToken() {
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if (isPrefix) return assignmentOperator.getBeginToken();
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return super.getBeginToken();
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}
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Token getEndToken() {
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if (isPostfix) return assignmentOperator.getEndToken();
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return super.getEndToken();
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}
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}
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class NewExpression extends Expression {
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/** The token NEW or CONST */
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final Token newToken;
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// Note: we expect that send.receiver is null.
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final Send send;
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NewExpression([this.newToken, this.send]);
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accept(Visitor visitor) => visitor.visitNewExpression(this);
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visitChildren(Visitor visitor) {
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if (send !== null) send.accept(visitor);
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}
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bool isConst() => newToken.stringValue === 'const';
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Token getBeginToken() => newToken;
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Token getEndToken() => send.getEndToken();
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}
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class NodeList extends Node implements Iterable<Node> {
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final Link<Node> nodes;
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final Token beginToken;
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final Token endToken;
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final SourceString delimiter;
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bool isEmpty() => nodes.isEmpty();
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NodeList([this.beginToken, this.nodes, this.endToken, this.delimiter]);
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Iterator<Node> iterator() => nodes.iterator();
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NodeList.singleton(Node node) : this(null, new Link<Node>(node));
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NodeList.empty() : this(null, const EmptyLink<Node>());
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NodeList asNodeList() => this;
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int length() {
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int result = 0;
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for (Link<Node> cursor = nodes; !cursor.isEmpty(); cursor = cursor.tail) {
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result++;
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}
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return result;
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}
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accept(Visitor visitor) => visitor.visitNodeList(this);
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visitChildren(Visitor visitor) {
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if (nodes === null) return;
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for (Link<Node> link = nodes; !link.isEmpty(); link = link.tail) {
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if (link.head !== null) link.head.accept(visitor);
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}
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}
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Token getBeginToken() {
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if (beginToken !== null) return beginToken;
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if (nodes !== null) {
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for (Link<Node> link = nodes; !link.isEmpty(); link = link.tail) {
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if (link.head.getBeginToken() !== null) {
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return link.head.getBeginToken();
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}
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if (link.head.getEndToken() !== null) {
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return link.head.getEndToken();
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}
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}
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}
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return endToken;
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}
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Token getEndToken() {
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if (endToken !== null) return endToken;
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if (nodes !== null) {
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Link<Node> link = nodes;
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if (link.isEmpty()) return beginToken;
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while (!link.tail.isEmpty()) link = link.tail;
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if (link.head.getEndToken() !== null) return link.head.getEndToken();
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if (link.head.getBeginToken() !== null) return link.head.getBeginToken();
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}
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return beginToken;
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}
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}
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class Block extends Statement {
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final NodeList statements;
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Block(this.statements);
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Block asBlock() => this;
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accept(Visitor visitor) => visitor.visitBlock(this);
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visitChildren(Visitor visitor) {
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if (statements !== null) statements.accept(visitor);
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}
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Token getBeginToken() => statements.getBeginToken();
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Token getEndToken() => statements.getEndToken();
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}
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class If extends Statement {
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final ParenthesizedExpression condition;
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final Statement thenPart;
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final Statement elsePart;
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final Token ifToken;
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final Token elseToken;
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If(this.condition, this.thenPart, this.elsePart,
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this.ifToken, this.elseToken);
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If asIf() => this;
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bool get hasElsePart() => elsePart !== null;
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void validate() {
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// TODO(ahe): Check that condition has size one.
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}
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accept(Visitor visitor) => visitor.visitIf(this);
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visitChildren(Visitor visitor) {
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if (condition !== null) condition.accept(visitor);
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if (thenPart !== null) thenPart.accept(visitor);
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if (elsePart !== null) elsePart.accept(visitor);
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}
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Token getBeginToken() => ifToken;
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Token getEndToken() {
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if (elsePart === null) return thenPart.getEndToken();
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return elsePart.getEndToken();
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}
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}
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class Conditional extends Expression {
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final Expression condition;
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final Expression thenExpression;
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final Expression elseExpression;
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final Token questionToken;
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final Token colonToken;
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Conditional(this.condition, this.thenExpression,
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this.elseExpression, this.questionToken, this.colonToken);
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Conditional asConditional() => this;
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accept(Visitor visitor) => visitor.visitConditional(this);
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visitChildren(Visitor visitor) {
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condition.accept(visitor);
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thenExpression.accept(visitor);
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elseExpression.accept(visitor);
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}
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Token getBeginToken() => condition.getBeginToken();
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Token getEndToken() => elseExpression.getEndToken();
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}
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class For extends Loop {
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/** Either a variable declaration or an expression. */
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final Node initializer;
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/** Either an expression statement or an empty statement. */
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final Statement conditionStatement;
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final NodeList update;
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final Token forToken;
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For(this.initializer, this.conditionStatement, this.update, body,
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this.forToken) : super(body);
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For asFor() => this;
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Expression get condition() {
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if (conditionStatement is ExpressionStatement) {
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return conditionStatement.asExpressionStatement().expression;
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} else {
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return null;
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}
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}
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accept(Visitor visitor) => visitor.visitFor(this);
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visitChildren(Visitor visitor) {
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if (initializer !== null) initializer.accept(visitor);
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if (conditionStatement !== null) conditionStatement.accept(visitor);
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if (update !== null) update.accept(visitor);
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if (body !== null) body.accept(visitor);
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}
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Token getBeginToken() => forToken;
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Token getEndToken() {
|
|
return body.getEndToken();
|
|
}
|
|
}
|
|
|
|
class FunctionDeclaration extends Statement {
|
|
final FunctionExpression function;
|
|
|
|
FunctionDeclaration(this.function);
|
|
|
|
FunctionDeclaration asFunctionDeclaration() => this;
|
|
|
|
accept(Visitor visitor) => visitor.visitFunctionDeclaration(this);
|
|
|
|
visitChildren(Visitor visitor) => function.accept(visitor);
|
|
|
|
Token getBeginToken() => function.getBeginToken();
|
|
Token getEndToken() => function.getEndToken();
|
|
}
|
|
|
|
class FunctionExpression extends Expression {
|
|
final Node name;
|
|
|
|
/**
|
|
* List of VariableDefinitions or NodeList.
|
|
*
|
|
* A NodeList can only occur at the end and holds named parameters.
|
|
*/
|
|
final NodeList parameters;
|
|
|
|
final Statement body;
|
|
final TypeAnnotation returnType;
|
|
final Modifiers modifiers;
|
|
final NodeList initializers;
|
|
|
|
final Token getOrSet;
|
|
|
|
FunctionExpression(this.name, this.parameters, this.body, this.returnType,
|
|
this.modifiers, this.initializers, this.getOrSet);
|
|
|
|
FunctionExpression asFunctionExpression() => this;
|
|
|
|
accept(Visitor visitor) => visitor.visitFunctionExpression(this);
|
|
|
|
visitChildren(Visitor visitor) {
|
|
if (modifiers !== null) modifiers.accept(visitor);
|
|
if (returnType !== null) returnType.accept(visitor);
|
|
if (name !== null) name.accept(visitor);
|
|
if (parameters !== null) parameters.accept(visitor);
|
|
if (initializers !== null) initializers.accept(visitor);
|
|
if (body !== null) body.accept(visitor);
|
|
}
|
|
|
|
bool hasBody() {
|
|
// TODO(karlklose,ahe): refactor AST nodes (issue 1713).
|
|
if (body.asReturn() !== null) return true;
|
|
NodeList statements = body.asBlock().statements;
|
|
return (!statements.nodes.isEmpty() ||
|
|
statements.getBeginToken().kind !== $SEMICOLON);
|
|
}
|
|
|
|
Token getBeginToken() {
|
|
Token token = firstBeginToken(modifiers, returnType);
|
|
if (token !== null) return token;
|
|
if (getOrSet !== null) return getOrSet;
|
|
return firstBeginToken(name, parameters);
|
|
}
|
|
|
|
Token getEndToken() {
|
|
Token token = (body === null) ? null : body.getEndToken();
|
|
token = (token === null) ? parameters.getEndToken() : token;
|
|
return (token === null) ? name.getEndToken() : token;
|
|
}
|
|
}
|
|
|
|
typedef void DecodeErrorHandler(Token token, var error);
|
|
|
|
class Literal<T> extends Expression {
|
|
final Token token;
|
|
final DecodeErrorHandler handler;
|
|
|
|
Literal(Token this.token, DecodeErrorHandler this.handler);
|
|
|
|
abstract T get value();
|
|
|
|
visitChildren(Visitor visitor) {}
|
|
|
|
Token getBeginToken() => token;
|
|
|
|
Token getEndToken() => token;
|
|
}
|
|
|
|
class LiteralInt extends Literal<int> {
|
|
LiteralInt(Token token, DecodeErrorHandler handler) : super(token, handler);
|
|
|
|
LiteralInt asLiteralInt() => this;
|
|
|
|
int get value() {
|
|
try {
|
|
Token valueToken = token;
|
|
if (valueToken.kind === PLUS_TOKEN) valueToken = valueToken.next;
|
|
return Math.parseInt(valueToken.value.slowToString());
|
|
} catch (BadNumberFormatException ex) {
|
|
(this.handler)(token, ex);
|
|
}
|
|
}
|
|
|
|
accept(Visitor visitor) => visitor.visitLiteralInt(this);
|
|
}
|
|
|
|
class LiteralDouble extends Literal<double> {
|
|
LiteralDouble(Token token, DecodeErrorHandler handler)
|
|
: super(token, handler);
|
|
|
|
LiteralDouble asLiteralDouble() => this;
|
|
|
|
double get value() {
|
|
try {
|
|
Token valueToken = token;
|
|
if (valueToken.kind === PLUS_TOKEN) valueToken = valueToken.next;
|
|
return Math.parseDouble(valueToken.value.slowToString());
|
|
} catch (BadNumberFormatException ex) {
|
|
(this.handler)(token, ex);
|
|
}
|
|
}
|
|
|
|
accept(Visitor visitor) => visitor.visitLiteralDouble(this);
|
|
}
|
|
|
|
class LiteralBool extends Literal<bool> {
|
|
LiteralBool(Token token, DecodeErrorHandler handler) : super(token, handler);
|
|
|
|
LiteralBool asLiteralBool() => this;
|
|
|
|
bool get value() {
|
|
if (token.value == Keyword.TRUE) return true;
|
|
if (token.value == Keyword.FALSE) return false;
|
|
(this.handler)(token, "not a bool ${token.value}");
|
|
}
|
|
|
|
accept(Visitor visitor) => visitor.visitLiteralBool(this);
|
|
}
|
|
|
|
|
|
class StringQuoting {
|
|
static final StringQuoting SINGLELINE_DQ =
|
|
const StringQuoting($DQ, raw: false, leftQuoteLength: 1);
|
|
static final StringQuoting RAW_SINGLELINE_DQ =
|
|
const StringQuoting($DQ, raw: true, leftQuoteLength: 1);
|
|
static final StringQuoting MULTILINE_DQ =
|
|
const StringQuoting($DQ, raw: false, leftQuoteLength: 3);
|
|
static final StringQuoting RAW_MULTILINE_DQ =
|
|
const StringQuoting($DQ, raw: true, leftQuoteLength: 3);
|
|
static final StringQuoting MULTILINE_NL_DQ =
|
|
const StringQuoting($DQ, raw: false, leftQuoteLength: 4);
|
|
static final StringQuoting RAW_MULTILINE_NL_DQ =
|
|
const StringQuoting($DQ, raw: true, leftQuoteLength: 4);
|
|
static final StringQuoting MULTILINE_NL2_DQ =
|
|
const StringQuoting($DQ, raw: false, leftQuoteLength: 5);
|
|
static final StringQuoting RAW_MULTILINE_NL2_DQ =
|
|
const StringQuoting($DQ, raw: true, leftQuoteLength: 5);
|
|
static final StringQuoting SINGLELINE_SQ =
|
|
const StringQuoting($SQ, raw: false, leftQuoteLength: 1);
|
|
static final StringQuoting RAW_SINGLELINE_SQ =
|
|
const StringQuoting($SQ, raw: true, leftQuoteLength: 1);
|
|
static final StringQuoting MULTILINE_SQ =
|
|
const StringQuoting($SQ, raw: false, leftQuoteLength: 3);
|
|
static final StringQuoting RAW_MULTILINE_SQ =
|
|
const StringQuoting($SQ, raw: true, leftQuoteLength: 3);
|
|
static final StringQuoting MULTILINE_NL_SQ =
|
|
const StringQuoting($SQ, raw: false, leftQuoteLength: 4);
|
|
static final StringQuoting RAW_MULTILINE_NL_SQ =
|
|
const StringQuoting($SQ, raw: true, leftQuoteLength: 4);
|
|
static final StringQuoting MULTILINE_NL2_SQ =
|
|
const StringQuoting($SQ, raw: false, leftQuoteLength: 5);
|
|
static final StringQuoting RAW_MULTILINE_NL2_SQ =
|
|
const StringQuoting($SQ, raw: true, leftQuoteLength: 5);
|
|
|
|
|
|
static final List<StringQuoting> mapping = const <StringQuoting>[
|
|
SINGLELINE_DQ,
|
|
RAW_SINGLELINE_DQ,
|
|
MULTILINE_DQ,
|
|
RAW_MULTILINE_DQ,
|
|
MULTILINE_NL_DQ,
|
|
RAW_MULTILINE_NL_DQ,
|
|
MULTILINE_NL2_DQ,
|
|
RAW_MULTILINE_NL2_DQ,
|
|
SINGLELINE_SQ,
|
|
RAW_SINGLELINE_SQ,
|
|
MULTILINE_SQ,
|
|
RAW_MULTILINE_SQ,
|
|
MULTILINE_NL_SQ,
|
|
RAW_MULTILINE_NL_SQ,
|
|
MULTILINE_NL2_SQ,
|
|
RAW_MULTILINE_NL2_SQ
|
|
];
|
|
final bool raw;
|
|
final int leftQuoteCharCount;
|
|
final int quote;
|
|
const StringQuoting(this.quote, [bool raw, int leftQuoteLength])
|
|
: this.raw = raw, this.leftQuoteCharCount = leftQuoteLength;
|
|
String get quoteChar() => quote === $DQ ? '"' : "'";
|
|
|
|
int get leftQuoteLength() => (raw ? 1 : 0) + leftQuoteCharCount;
|
|
int get rightQuoteLength() => (leftQuoteCharCount > 2) ? 3 : 1;
|
|
static StringQuoting getQuoting(int quote, bool raw, int quoteLength) {
|
|
int index = quoteLength - 1;
|
|
if (quoteLength > 2) index -= 1;
|
|
return mapping[(raw ? 1 : 0) + index * 2 + (quote === $SQ ? 8 : 0)];
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Superclass for classes representing string literals.
|
|
*/
|
|
class StringNode extends Expression {
|
|
abstract DartString get dartString();
|
|
abstract bool get isInterpolation();
|
|
|
|
StringNode asStringNode() => this;
|
|
}
|
|
|
|
class LiteralString extends StringNode {
|
|
final Token token;
|
|
/** Non-null on validated string literals. */
|
|
final DartString dartString;
|
|
|
|
LiteralString(this.token, this.dartString);
|
|
|
|
LiteralString asLiteralString() => this;
|
|
|
|
void visitChildren(Visitor visitor) {}
|
|
|
|
bool get isInterpolation() => false;
|
|
bool isValidated() => dartString !== null;
|
|
|
|
Token getBeginToken() => token;
|
|
Token getEndToken() => token;
|
|
|
|
accept(Visitor visitor) => visitor.visitLiteralString(this);
|
|
}
|
|
|
|
class LiteralNull extends Literal<SourceString> {
|
|
LiteralNull(Token token) : super(token, null);
|
|
|
|
LiteralNull asLiteralNull() => this;
|
|
|
|
SourceString get value() => null;
|
|
|
|
accept(Visitor visitor) => visitor.visitLiteralNull(this);
|
|
}
|
|
|
|
class LiteralList extends Expression {
|
|
final TypeAnnotation type;
|
|
final NodeList elements;
|
|
|
|
final Token constKeyword;
|
|
|
|
LiteralList(this.type, this.elements, this.constKeyword);
|
|
|
|
bool isConst() => constKeyword !== null;
|
|
|
|
LiteralList asLiteralList() => this;
|
|
accept(Visitor visitor) => visitor.visitLiteralList(this);
|
|
|
|
visitChildren(Visitor visitor) {
|
|
if (type !== null) type.accept(visitor);
|
|
elements.accept(visitor);
|
|
}
|
|
|
|
Token getBeginToken() {
|
|
if (constKeyword !== null) return constKeyword;
|
|
return firstBeginToken(type, elements);
|
|
}
|
|
|
|
Token getEndToken() => elements.getEndToken();
|
|
}
|
|
|
|
class Identifier extends Expression {
|
|
final Token token;
|
|
|
|
SourceString get source() => token.value;
|
|
|
|
Identifier(Token this.token);
|
|
|
|
bool isThis() => source.stringValue === 'this';
|
|
|
|
bool isSuper() => source.stringValue === 'super';
|
|
|
|
Identifier asIdentifier() => this;
|
|
|
|
accept(Visitor visitor) => visitor.visitIdentifier(this);
|
|
|
|
visitChildren(Visitor visitor) {}
|
|
|
|
Token getBeginToken() => token;
|
|
|
|
Token getEndToken() => token;
|
|
}
|
|
|
|
class Operator extends Identifier {
|
|
Operator(Token token) : super(token);
|
|
|
|
Operator asOperator() => this;
|
|
|
|
accept(Visitor visitor) => visitor.visitOperator(this);
|
|
}
|
|
|
|
class Return extends Statement {
|
|
final Expression expression;
|
|
final Token beginToken;
|
|
final Token endToken;
|
|
|
|
Return(this.beginToken, this.endToken, this.expression);
|
|
|
|
Return asReturn() => this;
|
|
|
|
bool get hasExpression() => expression !== null;
|
|
|
|
accept(Visitor visitor) => visitor.visitReturn(this);
|
|
|
|
visitChildren(Visitor visitor) {
|
|
if (expression !== null) expression.accept(visitor);
|
|
}
|
|
|
|
Token getBeginToken() => beginToken;
|
|
|
|
Token getEndToken() {
|
|
if (endToken === null) return expression.getEndToken();
|
|
return endToken;
|
|
}
|
|
}
|
|
|
|
class ExpressionStatement extends Statement {
|
|
final Expression expression;
|
|
final Token endToken;
|
|
|
|
ExpressionStatement(this.expression, this.endToken);
|
|
|
|
ExpressionStatement asExpressionStatement() => this;
|
|
|
|
accept(Visitor visitor) => visitor.visitExpressionStatement(this);
|
|
|
|
visitChildren(Visitor visitor) {
|
|
if (expression !== null) expression.accept(visitor);
|
|
}
|
|
|
|
Token getBeginToken() => expression.getBeginToken();
|
|
|
|
Token getEndToken() => endToken;
|
|
}
|
|
|
|
class Throw extends Statement {
|
|
final Expression expression;
|
|
|
|
final Token throwToken;
|
|
final Token endToken;
|
|
|
|
Throw(this.expression, this.throwToken, this.endToken);
|
|
|
|
Throw asThrow() => this;
|
|
|
|
accept(Visitor visitor) => visitor.visitThrow(this);
|
|
|
|
visitChildren(Visitor visitor) {
|
|
if (expression !== null) expression.accept(visitor);
|
|
}
|
|
|
|
Token getBeginToken() => throwToken;
|
|
|
|
Token getEndToken() => endToken;
|
|
}
|
|
|
|
class TypeAnnotation extends Node {
|
|
final Expression typeName;
|
|
final NodeList typeArguments;
|
|
|
|
TypeAnnotation(Expression this.typeName, NodeList this.typeArguments);
|
|
|
|
TypeAnnotation asTypeAnnotation() => this;
|
|
|
|
accept(Visitor visitor) => visitor.visitTypeAnnotation(this);
|
|
|
|
visitChildren(Visitor visitor) {
|
|
typeName.accept(visitor);
|
|
if (typeArguments !== null) typeArguments.accept(visitor);
|
|
}
|
|
|
|
Token getBeginToken() => typeName.getBeginToken();
|
|
|
|
Token getEndToken() => typeName.getEndToken();
|
|
}
|
|
|
|
class TypeVariable extends Node {
|
|
final Identifier name;
|
|
final TypeAnnotation bound;
|
|
TypeVariable(Identifier this.name, TypeAnnotation this.bound);
|
|
|
|
accept(Visitor visitor) => visitor.visitTypeVariable(this);
|
|
|
|
visitChildren(Visitor visitor) {
|
|
name.accept(visitor);
|
|
if (bound !== null) {
|
|
bound.accept(visitor);
|
|
}
|
|
}
|
|
|
|
TypeVariable asTypeVariable() => this;
|
|
|
|
Token getBeginToken() => name.getBeginToken();
|
|
|
|
Token getEndToken() {
|
|
return (bound !== null) ? bound.getEndToken() : name.getEndToken();
|
|
}
|
|
}
|
|
|
|
class VariableDefinitions extends Statement {
|
|
final Token endToken;
|
|
final TypeAnnotation type;
|
|
final Modifiers modifiers;
|
|
final NodeList definitions;
|
|
VariableDefinitions(this.type, this.modifiers, this.definitions,
|
|
this.endToken);
|
|
|
|
VariableDefinitions asVariableDefinitions() => this;
|
|
|
|
accept(Visitor visitor) => visitor.visitVariableDefinitions(this);
|
|
|
|
visitChildren(Visitor visitor) {
|
|
if (type !== null) type.accept(visitor);
|
|
if (definitions !== null) definitions.accept(visitor);
|
|
}
|
|
|
|
Token getBeginToken() {
|
|
var token = firstBeginToken(modifiers, type);
|
|
if (token === null) {
|
|
token = definitions.getBeginToken();
|
|
}
|
|
return token;
|
|
}
|
|
|
|
Token getEndToken() => endToken;
|
|
}
|
|
|
|
class Loop extends Statement {
|
|
abstract Expression get condition();
|
|
final Statement body;
|
|
|
|
Loop(this.body);
|
|
|
|
bool isValidContinueTarget() => true;
|
|
}
|
|
|
|
class DoWhile extends Loop {
|
|
final Token doKeyword;
|
|
final Token whileKeyword;
|
|
final Token endToken;
|
|
|
|
final Expression condition;
|
|
|
|
DoWhile(Statement body, Expression this.condition,
|
|
Token this.doKeyword, Token this.whileKeyword, Token this.endToken)
|
|
: super(body);
|
|
|
|
DoWhile asDoWhile() => this;
|
|
|
|
accept(Visitor visitor) => visitor.visitDoWhile(this);
|
|
|
|
visitChildren(Visitor visitor) {
|
|
if (condition !== null) condition.accept(visitor);
|
|
if (body !== null) body.accept(visitor);
|
|
}
|
|
|
|
Token getBeginToken() => doKeyword;
|
|
|
|
Token getEndToken() => endToken;
|
|
}
|
|
|
|
class While extends Loop {
|
|
final Token whileKeyword;
|
|
final Expression condition;
|
|
|
|
While(Expression this.condition, Statement body,
|
|
Token this.whileKeyword) : super(body);
|
|
|
|
While asWhile() => this;
|
|
|
|
accept(Visitor visitor) => visitor.visitWhile(this);
|
|
|
|
visitChildren(Visitor visitor) {
|
|
if (condition !== null) condition.accept(visitor);
|
|
if (body !== null) body.accept(visitor);
|
|
}
|
|
|
|
Token getBeginToken() => whileKeyword;
|
|
|
|
Token getEndToken() => body.getEndToken();
|
|
}
|
|
|
|
class ParenthesizedExpression extends Expression {
|
|
final Expression expression;
|
|
final BeginGroupToken beginToken;
|
|
|
|
ParenthesizedExpression(Expression this.expression,
|
|
BeginGroupToken this.beginToken);
|
|
|
|
ParenthesizedExpression asParenthesizedExpression() => this;
|
|
|
|
accept(Visitor visitor) => visitor.visitParenthesizedExpression(this);
|
|
|
|
visitChildren(Visitor visitor) {
|
|
if (expression !== null) expression.accept(visitor);
|
|
}
|
|
|
|
Token getBeginToken() => beginToken;
|
|
|
|
Token getEndToken() => beginToken.endGroup;
|
|
}
|
|
|
|
/** Representation of modifiers such as static, abstract, final, etc. */
|
|
class Modifiers extends Node {
|
|
/* TODO(ahe): The following should be validated relating to modifiers:
|
|
* 1. The nodes must come in a certain order.
|
|
* 2. The keywords "var" and "final" may not be used at the same time.
|
|
* 3. The keywords "abstract" and "external" may not be used at the same time.
|
|
* 4. The type of an element must be null if isVar() is true.
|
|
*/
|
|
|
|
final NodeList nodes;
|
|
/** Bit pattern to easy check what modifiers are present. */
|
|
final int flags;
|
|
|
|
static final int FLAG_STATIC = 1;
|
|
static final int FLAG_ABSTRACT = FLAG_STATIC << 1;
|
|
static final int FLAG_FINAL = FLAG_ABSTRACT << 1;
|
|
static final int FLAG_VAR = FLAG_FINAL << 1;
|
|
static final int FLAG_CONST = FLAG_VAR << 1;
|
|
static final int FLAG_FACTORY = FLAG_CONST << 1;
|
|
static final int FLAG_EXTERNAL = FLAG_FACTORY << 1;
|
|
|
|
Modifiers(NodeList nodes) : this.withFlags(nodes, computeFlags(nodes.nodes));
|
|
|
|
Modifiers.empty() : this(new NodeList.empty());
|
|
|
|
Modifiers.withFlags(this.nodes, this.flags);
|
|
|
|
static int computeFlags(Link<Node> nodes) {
|
|
int flags = 0;
|
|
for (; !nodes.isEmpty(); nodes = nodes.tail) {
|
|
String value = nodes.head.asIdentifier().source.stringValue;
|
|
if (value === 'static') flags |= FLAG_STATIC;
|
|
else if (value === 'abstract') flags |= FLAG_ABSTRACT;
|
|
else if (value === 'final') flags |= FLAG_FINAL;
|
|
else if (value === 'var') flags |= FLAG_VAR;
|
|
else if (value === 'const') flags |= FLAG_CONST;
|
|
else if (value === 'factory') flags |= FLAG_FACTORY;
|
|
else if (value === 'external') flags |= FLAG_EXTERNAL;
|
|
else throw 'internal error: ${nodes.head}';
|
|
}
|
|
return flags;
|
|
}
|
|
|
|
Modifiers asModifiers() => this;
|
|
Token getBeginToken() => nodes.getBeginToken();
|
|
Token getEndToken() => nodes.getEndToken();
|
|
accept(Visitor visitor) => visitor.visitModifiers(this);
|
|
visitChildren(Visitor visitor) => nodes.accept(visitor);
|
|
|
|
bool isStatic() => (flags & FLAG_STATIC) != 0;
|
|
bool isAbstract() => (flags & FLAG_ABSTRACT) != 0;
|
|
bool isFinal() => (flags & FLAG_FINAL) != 0;
|
|
bool isVar() => (flags & FLAG_VAR) != 0;
|
|
bool isConst() => (flags & FLAG_CONST) != 0;
|
|
bool isFactory() => (flags & FLAG_FACTORY) != 0;
|
|
bool isExternal() => (flags & FLAG_EXTERNAL) != 0;
|
|
|
|
String toString() {
|
|
LinkBuilder<String> builder = new LinkBuilder<String>();
|
|
if (isStatic()) builder.addLast('static');
|
|
if (isAbstract()) builder.addLast('abstract');
|
|
if (isFinal()) builder.addLast('final');
|
|
if (isVar()) builder.addLast('var');
|
|
if (isConst()) builder.addLast('const');
|
|
if (isFactory()) builder.addLast('factory');
|
|
if (isExternal()) builder.addLast('external');
|
|
StringBuffer buffer = new StringBuffer();
|
|
builder.toLink().printOn(buffer, ', ');
|
|
return buffer.toString();
|
|
}
|
|
}
|
|
|
|
class StringInterpolation extends StringNode {
|
|
final LiteralString string;
|
|
final NodeList parts;
|
|
|
|
StringInterpolation(this.string, this.parts);
|
|
|
|
StringInterpolation asStringInterpolation() => this;
|
|
|
|
DartString get dartString() => null;
|
|
bool get isInterpolation() => true;
|
|
|
|
accept(Visitor visitor) => visitor.visitStringInterpolation(this);
|
|
|
|
visitChildren(Visitor visitor) {
|
|
string.accept(visitor);
|
|
parts.accept(visitor);
|
|
}
|
|
|
|
Token getBeginToken() => string.getBeginToken();
|
|
Token getEndToken() => parts.getEndToken();
|
|
}
|
|
|
|
class StringInterpolationPart extends Node {
|
|
final Expression expression;
|
|
final LiteralString string;
|
|
|
|
StringInterpolationPart(this.expression, this.string);
|
|
|
|
StringInterpolationPart asStringInterpolationPart() => this;
|
|
|
|
accept(Visitor visitor) => visitor.visitStringInterpolationPart(this);
|
|
|
|
visitChildren(Visitor visitor) {
|
|
expression.accept(visitor);
|
|
string.accept(visitor);
|
|
}
|
|
|
|
Token getBeginToken() => expression.getBeginToken();
|
|
|
|
Token getEndToken() => string.getEndToken();
|
|
}
|
|
|
|
/**
|
|
* A class representing juxtaposed string literals.
|
|
* The string literals can be both plain literals and string interpolations.
|
|
*/
|
|
class StringJuxtaposition extends StringNode {
|
|
final Expression first;
|
|
final Expression second;
|
|
|
|
/**
|
|
* Caches the check for whether this juxtaposition contains a string
|
|
* interpolation
|
|
*/
|
|
bool isInterpolationCache = null;
|
|
|
|
/**
|
|
* Caches a Dart string representation of the entire juxtaposition's
|
|
* content. Only juxtapositions that don't (transitively) contains
|
|
* interpolations have a static representation.
|
|
*/
|
|
DartString dartStringCache = null;
|
|
|
|
StringJuxtaposition(this.first, this.second);
|
|
|
|
StringJuxtaposition asStringJuxtaposition() => this;
|
|
|
|
bool get isInterpolation() {
|
|
if (isInterpolationCache === null) {
|
|
isInterpolationCache = (first.accept(const IsInterpolationVisitor()) ||
|
|
second.accept(const IsInterpolationVisitor()));
|
|
}
|
|
return isInterpolationCache;
|
|
}
|
|
|
|
/**
|
|
* Retrieve a single DartString that represents this entire juxtaposition
|
|
* of string literals.
|
|
* Should only be called if [isInterpolation] returns false.
|
|
*/
|
|
DartString get dartString() {
|
|
if (isInterpolation) {
|
|
throw new NodeAssertionFailure(this,
|
|
"Getting dartString on interpolation;");
|
|
}
|
|
if (dartStringCache === null) {
|
|
DartString firstString = first.accept(const GetDartStringVisitor());
|
|
DartString secondString = second.accept(const GetDartStringVisitor());
|
|
if (firstString === null || secondString === null) {
|
|
return null;
|
|
}
|
|
dartStringCache = new DartString.concat(firstString, secondString);
|
|
}
|
|
return dartStringCache;
|
|
}
|
|
|
|
accept(Visitor visitor) => visitor.visitStringJuxtaposition(this);
|
|
|
|
void visitChildren(Visitor visitor) {
|
|
first.accept(visitor);
|
|
second.accept(visitor);
|
|
}
|
|
|
|
Token getBeginToken() => first.getBeginToken();
|
|
|
|
Token getEndToken() => second.getEndToken();
|
|
}
|
|
|
|
class EmptyStatement extends Statement {
|
|
final Token semicolonToken;
|
|
|
|
EmptyStatement(this.semicolonToken);
|
|
|
|
EmptyStatement asEmptyStatement() => this;
|
|
|
|
accept(Visitor visitor) => visitor.visitEmptyStatement(this);
|
|
|
|
visitChildren(Visitor visitor) {}
|
|
|
|
Token getBeginToken() => semicolonToken;
|
|
|
|
Token getEndToken() => semicolonToken;
|
|
}
|
|
|
|
class LiteralMap extends Expression {
|
|
final NodeList typeArguments;
|
|
final NodeList entries;
|
|
|
|
final Token constKeyword;
|
|
|
|
LiteralMap(this.typeArguments, this.entries, this.constKeyword);
|
|
|
|
bool isConst() => constKeyword !== null;
|
|
|
|
LiteralMap asLiteralMap() => this;
|
|
|
|
accept(Visitor visitor) => visitor.visitLiteralMap(this);
|
|
|
|
visitChildren(Visitor visitor) {
|
|
if (typeArguments != null) typeArguments.accept(visitor);
|
|
entries.accept(visitor);
|
|
}
|
|
|
|
Token getBeginToken() {
|
|
if (constKeyword !== null) return constKeyword;
|
|
return firstBeginToken(typeArguments, entries);
|
|
}
|
|
|
|
Token getEndToken() => entries.getEndToken();
|
|
}
|
|
|
|
class LiteralMapEntry extends Node {
|
|
final Expression key;
|
|
final Expression value;
|
|
|
|
final Token colonToken;
|
|
|
|
LiteralMapEntry(this.key, this.colonToken, this.value);
|
|
|
|
LiteralMapEntry asLiteralMapEntry() => this;
|
|
|
|
accept(Visitor visitor) => visitor.visitLiteralMapEntry(this);
|
|
|
|
visitChildren(Visitor visitor) {
|
|
key.accept(visitor);
|
|
value.accept(visitor);
|
|
}
|
|
|
|
Token getBeginToken() => key.getBeginToken();
|
|
|
|
Token getEndToken() => value.getEndToken();
|
|
}
|
|
|
|
class NamedArgument extends Expression {
|
|
final Identifier name;
|
|
final Expression expression;
|
|
|
|
final Token colonToken;
|
|
|
|
NamedArgument(this.name, this.colonToken, this.expression);
|
|
|
|
NamedArgument asNamedArgument() => this;
|
|
|
|
accept(Visitor visitor) => visitor.visitNamedArgument(this);
|
|
|
|
visitChildren(Visitor visitor) {
|
|
name.accept(visitor);
|
|
expression.accept(visitor);
|
|
}
|
|
|
|
Token getBeginToken() => name.getBeginToken();
|
|
|
|
Token getEndToken() => expression.getEndToken();
|
|
}
|
|
|
|
class SwitchStatement extends Statement {
|
|
final ParenthesizedExpression parenthesizedExpression;
|
|
final NodeList cases;
|
|
|
|
final Token switchKeyword;
|
|
|
|
SwitchStatement(this.parenthesizedExpression, this.cases,
|
|
this.switchKeyword);
|
|
|
|
SwitchStatement asSwitchStatement() => this;
|
|
|
|
Expression get expression() => parenthesizedExpression.expression;
|
|
|
|
accept(Visitor visitor) => visitor.visitSwitchStatement(this);
|
|
|
|
visitChildren(Visitor visitor) {
|
|
parenthesizedExpression.accept(visitor);
|
|
cases.accept(visitor);
|
|
}
|
|
|
|
Token getBeginToken() => switchKeyword;
|
|
|
|
Token getEndToken() => cases.getEndToken();
|
|
}
|
|
|
|
class CaseMatch extends Node {
|
|
final Token caseKeyword;
|
|
final Expression expression;
|
|
final Token colonToken;
|
|
CaseMatch(this.caseKeyword, this.expression, this.colonToken);
|
|
|
|
CaseMatch asCaseMatch() => this;
|
|
Token getBeginToken() => caseKeyword;
|
|
Token getEndToken() => colonToken;
|
|
accept(Visitor visitor) => visitor.visitCaseMatch(this);
|
|
visitChildren(Visitor visitor) => expression.accept(visitor);
|
|
}
|
|
|
|
class SwitchCase extends Node {
|
|
// The labels and case patterns are collected in [labelsAndCases].
|
|
// The default keyword, if present, is collected in [defaultKeyword].
|
|
// Any actual switch case must have at least one 'case' or 'default'
|
|
// clause.
|
|
// Notice: The labels and cases can occur interleaved in the source.
|
|
// They are separated here, since the order is irrelevant to the meaning
|
|
// of the switch.
|
|
|
|
/** List of [Label] and [CaseMatch] nodes. */
|
|
final NodeList labelsAndCases;
|
|
/** A "default" keyword token, if applicable. */
|
|
final Token defaultKeyword;
|
|
/** List of statements, the body of the case. */
|
|
final NodeList statements;
|
|
|
|
final Token startToken;
|
|
|
|
SwitchCase(this.labelsAndCases, this.defaultKeyword,
|
|
this.statements, this.startToken);
|
|
|
|
SwitchCase asSwitchCase() => this;
|
|
|
|
bool get isDefaultCase() => defaultKeyword !== null;
|
|
|
|
bool isValidContinueTarget() => true;
|
|
|
|
accept(Visitor visitor) => visitor.visitSwitchCase(this);
|
|
|
|
visitChildren(Visitor visitor) {
|
|
labelsAndCases.accept(visitor);
|
|
statements.accept(visitor);
|
|
}
|
|
|
|
Token getBeginToken() {
|
|
return startToken;
|
|
}
|
|
|
|
Token getEndToken() {
|
|
if (statements.nodes.isEmpty()) {
|
|
// All cases must have at least one expression or be the default.
|
|
if (defaultKeyword !== null) {
|
|
// The colon after 'default'.
|
|
return defaultKeyword.next;
|
|
}
|
|
// The colon after the last expression.
|
|
return labelsAndCases.getEndToken();
|
|
} else {
|
|
return statements.getEndToken();
|
|
}
|
|
}
|
|
}
|
|
|
|
class GotoStatement extends Statement {
|
|
final Identifier target;
|
|
final Token keywordToken;
|
|
final Token semicolonToken;
|
|
|
|
GotoStatement(this.target, this.keywordToken, this.semicolonToken);
|
|
|
|
visitChildren(Visitor visitor) {
|
|
if (target !== null) target.accept(visitor);
|
|
}
|
|
|
|
Token getBeginToken() => keywordToken;
|
|
|
|
Token getEndToken() => semicolonToken;
|
|
|
|
// TODO(ahe): make class abstract instead of adding an abstract method.
|
|
abstract accept(Visitor visitor);
|
|
}
|
|
|
|
class BreakStatement extends GotoStatement {
|
|
BreakStatement(Identifier target, Token keywordToken, Token semicolonToken)
|
|
: super(target, keywordToken, semicolonToken);
|
|
|
|
BreakStatement asBreakStatement() => this;
|
|
|
|
accept(Visitor visitor) => visitor.visitBreakStatement(this);
|
|
}
|
|
|
|
class ContinueStatement extends GotoStatement {
|
|
ContinueStatement(Identifier target, Token keywordToken, Token semicolonToken)
|
|
: super(target, keywordToken, semicolonToken);
|
|
|
|
ContinueStatement asContinueStatement() => this;
|
|
|
|
accept(Visitor visitor) => visitor.visitContinueStatement(this);
|
|
}
|
|
|
|
class ForIn extends Loop {
|
|
final Node declaredIdentifier;
|
|
final Expression expression;
|
|
|
|
final Token forToken;
|
|
final Token inToken;
|
|
|
|
ForIn(this.declaredIdentifier, this.expression,
|
|
Statement body, this.forToken, this.inToken) : super(body);
|
|
|
|
Expression get condition() => null;
|
|
|
|
ForIn asForIn() => this;
|
|
|
|
accept(Visitor visitor) => visitor.visitForIn(this);
|
|
|
|
visitChildren(Visitor visitor) {
|
|
declaredIdentifier.accept(visitor);
|
|
expression.accept(visitor);
|
|
body.accept(visitor);
|
|
}
|
|
|
|
Token getBeginToken() => forToken;
|
|
|
|
Token getEndToken() => body.getEndToken();
|
|
}
|
|
|
|
class Label extends Node {
|
|
final Identifier identifier;
|
|
final Token colonToken;
|
|
|
|
Label(this.identifier, this.colonToken);
|
|
|
|
String slowToString() => identifier.source.slowToString();
|
|
|
|
Label asLabel() => this;
|
|
|
|
accept(Visitor visitor) => visitor.visitLabel(this);
|
|
|
|
void visitChildren(Visitor visitor) {
|
|
identifier.accept(visitor);
|
|
}
|
|
|
|
Token getBeginToken() => identifier.token;
|
|
Token getEndToken() => colonToken;
|
|
}
|
|
|
|
class LabeledStatement extends Statement {
|
|
final NodeList labels;
|
|
final Statement statement;
|
|
|
|
LabeledStatement(this.labels, this.statement);
|
|
|
|
LabeledStatement asLabeledStatement() => this;
|
|
|
|
accept(Visitor visitor) => visitor.visitLabeledStatement(this);
|
|
|
|
visitChildren(Visitor visitor) {
|
|
labels.accept(visitor);
|
|
statement.accept(visitor);
|
|
}
|
|
|
|
Token getBeginToken() => labels.getBeginToken();
|
|
|
|
Token getEndToken() => statement.getEndToken();
|
|
|
|
bool isValidContinueTarget() => statement.isValidContinueTarget();
|
|
|
|
Node getBody() => statement;
|
|
}
|
|
|
|
class ScriptTag extends Node {
|
|
final Identifier tag;
|
|
final StringNode argument;
|
|
final Identifier prefixIdentifier;
|
|
final StringNode prefix;
|
|
|
|
final Token beginToken;
|
|
final Token endToken;
|
|
|
|
ScriptTag(this.tag, this.argument, this.prefixIdentifier, this.prefix,
|
|
this.beginToken, this.endToken);
|
|
|
|
bool isImport() => tag.source == const SourceString("import");
|
|
bool isSource() => tag.source == const SourceString("source");
|
|
bool isLibrary() => tag.source == const SourceString("library");
|
|
bool isResource() => tag.source == const SourceString("resource");
|
|
|
|
ScriptTag asScriptTag() => this;
|
|
|
|
accept(Visitor visitor) => visitor.visitScriptTag(this);
|
|
|
|
visitChildren(Visitor visitor) {
|
|
tag.accept(visitor);
|
|
argument.accept(visitor);
|
|
if (prefixIdentifier !== null) prefixIdentifier.accept(visitor);
|
|
if (prefix !== null) prefix.accept(visitor);
|
|
}
|
|
|
|
Token getBeginToken() => beginToken;
|
|
|
|
Token getEndToken() => endToken;
|
|
}
|
|
|
|
class Typedef extends Node {
|
|
final TypeAnnotation returnType;
|
|
final Identifier name;
|
|
final NodeList typeParameters;
|
|
final NodeList formals;
|
|
|
|
final Token typedefKeyword;
|
|
final Token endToken;
|
|
|
|
Typedef(this.returnType, this.name, this.typeParameters, this.formals,
|
|
this.typedefKeyword, this.endToken);
|
|
|
|
Typedef asTypedef() => this;
|
|
|
|
accept(Visitor visitor) => visitor.visitTypedef(this);
|
|
|
|
visitChildren(Visitor visitor) {
|
|
if (returnType !== null) returnType.accept(visitor);
|
|
name.accept(visitor);
|
|
if (typeParameters !== null) typeParameters.accept(visitor);
|
|
formals.accept(visitor);
|
|
}
|
|
|
|
Token getBeginToken() => typedefKeyword;
|
|
|
|
Token getEndToken() => endToken;
|
|
}
|
|
|
|
class TryStatement extends Statement {
|
|
final Block tryBlock;
|
|
final NodeList catchBlocks;
|
|
final Block finallyBlock;
|
|
|
|
final Token tryKeyword;
|
|
final Token finallyKeyword;
|
|
|
|
TryStatement(this.tryBlock, this.catchBlocks, this.finallyBlock,
|
|
this.tryKeyword, this.finallyKeyword);
|
|
|
|
TryStatement asTryStatement() => this;
|
|
|
|
accept(Visitor visitor) => visitor.visitTryStatement(this);
|
|
|
|
visitChildren(Visitor visitor) {
|
|
tryBlock.accept(visitor);
|
|
catchBlocks.accept(visitor);
|
|
if (finallyBlock !== null) finallyBlock.accept(visitor);
|
|
}
|
|
|
|
Token getBeginToken() => tryKeyword;
|
|
|
|
Token getEndToken() {
|
|
if (finallyBlock !== null) return finallyBlock.getEndToken();
|
|
if (!catchBlocks.isEmpty()) return catchBlocks.getEndToken();
|
|
return tryBlock.getEndToken();
|
|
}
|
|
}
|
|
|
|
class Cascade extends Expression {
|
|
final Expression expression;
|
|
Cascade(this.expression);
|
|
|
|
Cascade asCascade() => this;
|
|
accept(Visitor visitor) => visitor.visitCascade(this);
|
|
|
|
void visitChildren(Visitor visitor) {
|
|
expression.accept(visitor);
|
|
}
|
|
|
|
Token getBeginToken() => expression.getBeginToken();
|
|
|
|
Token getEndToken() => expression.getEndToken();
|
|
}
|
|
|
|
class CascadeReceiver extends Expression {
|
|
final Expression expression;
|
|
final Token cascadeOperator;
|
|
CascadeReceiver(this.expression, this.cascadeOperator);
|
|
|
|
CascadeReceiver asCascadeReceiver() => this;
|
|
accept(Visitor visitor) => visitor.visitCascadeReceiver(this);
|
|
|
|
void visitChildren(Visitor visitor) {
|
|
expression.accept(visitor);
|
|
}
|
|
|
|
Token getBeginToken() => expression.getBeginToken();
|
|
|
|
Token getEndToken() => expression.getEndToken();
|
|
}
|
|
|
|
class CatchBlock extends Node {
|
|
final NodeList formals;
|
|
final Block block;
|
|
|
|
final catchKeyword;
|
|
|
|
CatchBlock(this.formals, this.block, this.catchKeyword);
|
|
|
|
CatchBlock asCatchBlock() => this;
|
|
|
|
accept(Visitor visitor) => visitor.visitCatchBlock(this);
|
|
|
|
Node get exception() {
|
|
if (formals.nodes.isEmpty()) return null;
|
|
VariableDefinitions declarations = formals.nodes.head;
|
|
return declarations.definitions.nodes.head;
|
|
}
|
|
|
|
Node get trace() {
|
|
if (formals.nodes.isEmpty()) return null;
|
|
Link<Node> declarations = formals.nodes.tail;
|
|
if (declarations.isEmpty()) return null;
|
|
VariableDefinitions head = declarations.head;
|
|
return head.definitions.nodes.head;
|
|
}
|
|
|
|
visitChildren(Visitor visitor) {
|
|
formals.accept(visitor);
|
|
block.accept(visitor);
|
|
}
|
|
|
|
Token getBeginToken() => catchKeyword;
|
|
|
|
Token getEndToken() => block.getEndToken();
|
|
}
|
|
|
|
class Initializers {
|
|
static bool isSuperConstructorCall(Send node) {
|
|
return (node.receiver === null &&
|
|
node.selector.asIdentifier() !== null &&
|
|
node.selector.asIdentifier().isSuper()) ||
|
|
(node.receiver !== null &&
|
|
node.receiver.asIdentifier() !== null &&
|
|
node.receiver.asIdentifier().isSuper() &&
|
|
node.selector.asIdentifier() !== null);
|
|
}
|
|
|
|
static bool isConstructorRedirect(Send node) {
|
|
return (node.receiver === null &&
|
|
node.selector.asIdentifier() !== null &&
|
|
node.selector.asIdentifier().isThis()) ||
|
|
(node.receiver !== null &&
|
|
node.receiver.asIdentifier() !== null &&
|
|
node.receiver.asIdentifier().isThis() &&
|
|
node.selector.asIdentifier() !== null);
|
|
}
|
|
}
|
|
|
|
class GetDartStringVisitor extends AbstractVisitor<DartString> {
|
|
const GetDartStringVisitor();
|
|
DartString visitNode(Node node) => null;
|
|
DartString visitStringJuxtaposition(StringJuxtaposition node)
|
|
=> node.dartString;
|
|
DartString visitLiteralString(LiteralString node) => node.dartString;
|
|
}
|
|
|
|
class IsInterpolationVisitor extends AbstractVisitor<bool> {
|
|
const IsInterpolationVisitor();
|
|
bool visitNode(Node node) => false;
|
|
bool visitStringInterpolation(StringInterpolation node) => true;
|
|
bool visitStringJuxtaposition(StringJuxtaposition node)
|
|
=> node.isInterpolation;
|
|
}
|
|
|
|
/**
|
|
* If the given node is a send set, it visits its initializer (first
|
|
* argument).
|
|
*
|
|
* TODO(ahe): This method is controversial, the team needs to discuss
|
|
* if top-level methods are acceptable and what naming conventions to
|
|
* use.
|
|
*/
|
|
initializerDo(Node node, f(Node node)) {
|
|
SendSet send = node.asSendSet();
|
|
if (send !== null) return f(send.arguments.head);
|
|
}
|