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Unified Diff: sdk/lib/_internal/compiler/implementation/tree/nodes.dart

Issue 694353007: Move dart2js from sdk/lib/_internal/compiler to pkg/compiler (Closed) Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart
Patch Set: Created 6 years, 1 month ago
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Index: sdk/lib/_internal/compiler/implementation/tree/nodes.dart
diff --git a/sdk/lib/_internal/compiler/implementation/tree/nodes.dart b/sdk/lib/_internal/compiler/implementation/tree/nodes.dart
deleted file mode 100644
index 1e4b75d2ebae3f775beebbf41333e23bfcf61c10..0000000000000000000000000000000000000000
--- a/sdk/lib/_internal/compiler/implementation/tree/nodes.dart
+++ /dev/null
@@ -1,2274 +0,0 @@
-// Copyright (c) 2012, 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.
-
-part of tree;
-
-abstract class Visitor<R> {
- const Visitor();
-
- R visitNode(Node node);
-
- R visitAsyncModifier(AsyncModifier node) => visitNode(node);
- R visitAwait(Await node) => visitExpression(node);
- R visitBlock(Block node) => visitStatement(node);
- R visitBreakStatement(BreakStatement node) => visitGotoStatement(node);
- R visitCascade(Cascade node) => visitExpression(node);
- R visitCascadeReceiver(CascadeReceiver node) => visitExpression(node);
- R visitCaseMatch(CaseMatch node) => visitNode(node);
- R visitCatchBlock(CatchBlock node) => visitNode(node);
- R visitClassNode(ClassNode node) => visitNode(node);
- R visitCombinator(Combinator node) => visitNode(node);
- R visitConditional(Conditional node) => visitExpression(node);
- R visitContinueStatement(ContinueStatement node) => visitGotoStatement(node);
- R visitDoWhile(DoWhile node) => visitLoop(node);
- R visitEmptyStatement(EmptyStatement node) => visitStatement(node);
- R visitExport(Export node) => visitLibraryDependency(node);
- R visitExpression(Expression node) => visitNode(node);
- R visitExpressionStatement(ExpressionStatement node) => visitStatement(node);
- R visitFor(For node) => visitLoop(node);
- R visitForIn(ForIn node) => visitLoop(node);
- R visitFunctionDeclaration(FunctionDeclaration node) => visitStatement(node);
- R visitFunctionExpression(FunctionExpression node) => visitExpression(node);
- R visitGotoStatement(GotoStatement node) => visitStatement(node);
- R visitIdentifier(Identifier node) => visitExpression(node);
- R visitIf(If node) => visitStatement(node);
- R visitImport(Import node) => visitLibraryDependency(node);
- R visitLabel(Label node) => visitNode(node);
- R visitLabeledStatement(LabeledStatement node) => visitStatement(node);
- R visitLibraryDependency(LibraryDependency node) => visitLibraryTag(node);
- R visitLibraryName(LibraryName node) => visitLibraryTag(node);
- R visitLibraryTag(LibraryTag node) => visitNode(node);
- R visitLiteral(Literal node) => visitExpression(node);
- R visitLiteralBool(LiteralBool node) => visitLiteral(node);
- R visitLiteralDouble(LiteralDouble node) => visitLiteral(node);
- R visitLiteralInt(LiteralInt node) => visitLiteral(node);
- R visitLiteralList(LiteralList node) => visitExpression(node);
- R visitLiteralMap(LiteralMap node) => visitExpression(node);
- R visitLiteralMapEntry(LiteralMapEntry node) => visitNode(node);
- R visitLiteralNull(LiteralNull node) => visitLiteral(node);
- R visitLiteralString(LiteralString node) => visitStringNode(node);
- R visitStringJuxtaposition(StringJuxtaposition node) => visitStringNode(node);
- R visitLoop(Loop node) => visitStatement(node);
- R visitMetadata(Metadata node) => visitNode(node);
- R visitMixinApplication(MixinApplication node) => visitNode(node);
- R visitModifiers(Modifiers node) => visitNode(node);
- R visitNamedArgument(NamedArgument node) => visitExpression(node);
- R visitNamedMixinApplication(NamedMixinApplication node) {
- return visitMixinApplication(node);
- }
- R visitNewExpression(NewExpression node) => visitExpression(node);
- R visitNodeList(NodeList node) => visitNode(node);
- R visitOperator(Operator node) => visitIdentifier(node);
- R visitParenthesizedExpression(ParenthesizedExpression node) {
- return visitExpression(node);
- }
- R visitPart(Part node) => visitLibraryTag(node);
- R visitPartOf(PartOf node) => visitNode(node);
- R visitPostfix(Postfix node) => visitNodeList(node);
- R visitPrefix(Prefix node) => visitNodeList(node);
- R visitRedirectingFactoryBody(RedirectingFactoryBody node) {
- return visitStatement(node);
- }
- R visitRethrow(Rethrow node) => visitStatement(node);
- R visitReturn(Return node) => visitStatement(node);
- R visitSend(Send node) => visitExpression(node);
- R visitSendSet(SendSet node) => visitSend(node);
- R visitStatement(Statement node) => visitNode(node);
- R visitStringNode(StringNode node) => visitExpression(node);
- R visitStringInterpolation(StringInterpolation node) => visitStringNode(node);
- R visitStringInterpolationPart(StringInterpolationPart node) {
- return visitNode(node);
- }
- R visitSwitchCase(SwitchCase node) => visitNode(node);
- R visitSwitchStatement(SwitchStatement node) => visitStatement(node);
- R visitLiteralSymbol(LiteralSymbol node) => visitExpression(node);
- R visitThrow(Throw node) => visitExpression(node);
- R visitTryStatement(TryStatement node) => visitStatement(node);
- R visitTypeAnnotation(TypeAnnotation node) => visitNode(node);
- R visitTypedef(Typedef node) => visitNode(node);
- R visitTypeVariable(TypeVariable node) => visitNode(node);
- R visitVariableDefinitions(VariableDefinitions node) => visitStatement(node);
- R visitWhile(While node) => visitLoop(node);
- R visitYield(Yield node) => visitStatement(node);
-}
-
-Token firstBeginToken(Node first, Node second) {
- Token token = null;
- if (first != null) {
- token = first.getBeginToken();
- }
- if (token == null && second != null) {
- // [token] might be null even when [first] is not, e.g. for empty Modifiers.
- token = second.getBeginToken();
- }
- return token;
-}
-
-/**
- * A node in a syntax tree.
- *
- * The abstract part of "abstract syntax tree" is invalidated when
- * supporting tools such as code formatting. These tools need concrete
- * syntax such as parentheses and no constant folding.
- *
- * We support these tools by storing additional references back to the
- * token stream. These references are stored in fields ending with
- * "Token".
- */
-abstract class Node extends NullTreeElementMixin implements Spannable {
- final int hashCode;
- static int _HASH_COUNTER = 0;
-
- Node() : hashCode = ++_HASH_COUNTER;
-
- accept(Visitor visitor);
-
- visitChildren(Visitor visitor);
-
- /**
- * Returns this node unparsed to Dart source string.
- */
- toString() => unparse(this);
-
- /**
- * Returns Xml-like tree representation of this node.
- */
- toDebugString() {
- return PrettyPrinter.prettyPrint(this);
- }
-
- String getObjectDescription() => super.toString();
-
- Token getBeginToken();
-
- Token getEndToken();
-
- AsyncModifier asAsyncModifier() => null;
- Await asAwait() => null;
- Block asBlock() => null;
- BreakStatement asBreakStatement() => null;
- Cascade asCascade() => null;
- CascadeReceiver asCascadeReceiver() => null;
- CaseMatch asCaseMatch() => null;
- CatchBlock asCatchBlock() => null;
- ClassNode asClassNode() => null;
- Combinator asCombinator() => null;
- Conditional asConditional() => null;
- ContinueStatement asContinueStatement() => null;
- DoWhile asDoWhile() => null;
- EmptyStatement asEmptyStatement() => null;
- ErrorExpression asErrorExpression() => null;
- Export asExport() => null;
- Expression asExpression() => null;
- ExpressionStatement asExpressionStatement() => null;
- For asFor() => null;
- ForIn asForIn() => null;
- FunctionDeclaration asFunctionDeclaration() => null;
- FunctionExpression asFunctionExpression() => null;
- Identifier asIdentifier() => null;
- If asIf() => null;
- Import asImport() => null;
- Label asLabel() => null;
- LabeledStatement asLabeledStatement() => null;
- LibraryName asLibraryName() => null;
- LibraryDependency asLibraryDependency() => null;
- LiteralBool asLiteralBool() => null;
- LiteralDouble asLiteralDouble() => null;
- LiteralInt asLiteralInt() => null;
- LiteralList asLiteralList() => null;
- LiteralMap asLiteralMap() => null;
- LiteralMapEntry asLiteralMapEntry() => null;
- LiteralNull asLiteralNull() => null;
- LiteralString asLiteralString() => null;
- LiteralSymbol asLiteralSymbol() => null;
- Metadata asMetadata() => null;
- MixinApplication asMixinApplication() => null;
- Modifiers asModifiers() => null;
- NamedArgument asNamedArgument() => null;
- NamedMixinApplication asNamedMixinApplication() => null;
- NewExpression asNewExpression() => null;
- NodeList asNodeList() => null;
- Operator asOperator() => null;
- ParenthesizedExpression asParenthesizedExpression() => null;
- Part asPart() => null;
- PartOf asPartOf() => null;
- RedirectingFactoryBody asRedirectingFactoryBody() => null;
- Rethrow asRethrow() => null;
- Return asReturn() => null;
- Send asSend() => null;
- SendSet asSendSet() => null;
- Statement asStatement() => null;
- StringInterpolation asStringInterpolation() => null;
- StringInterpolationPart asStringInterpolationPart() => null;
- StringJuxtaposition asStringJuxtaposition() => null;
- StringNode asStringNode() => null;
- SwitchCase asSwitchCase() => null;
- SwitchStatement asSwitchStatement() => null;
- Throw asThrow() => null;
- TryStatement asTryStatement() => null;
- TypeAnnotation asTypeAnnotation() => null;
- TypeVariable asTypeVariable() => null;
- Typedef asTypedef() => null;
- VariableDefinitions asVariableDefinitions() => null;
- While asWhile() => null;
- Yield asYield() => null;
-
- bool isValidBreakTarget() => false;
- bool isValidContinueTarget() => false;
- bool isThis() => false;
- bool isSuper() => false;
-
- bool get isErroneous => false;
-}
-
-class ClassNode extends Node {
- final Modifiers modifiers;
- final Identifier name;
- final Node superclass;
- final NodeList interfaces;
- final NodeList typeParameters;
- final NodeList body;
-
- final Token beginToken;
- final Token extendsKeyword;
- final Token endToken;
-
- ClassNode(this.modifiers, this.name, this.typeParameters, this.superclass,
- this.interfaces, this.beginToken,
- this.extendsKeyword, this.body, this.endToken);
-
- ClassNode asClassNode() => this;
-
- accept(Visitor visitor) => visitor.visitClassNode(this);
-
- visitChildren(Visitor visitor) {
- if (name != null) name.accept(visitor);
- if (typeParameters != null) typeParameters.accept(visitor);
- if (superclass != null) superclass.accept(visitor);
- if (interfaces != null) interfaces.accept(visitor);
- if (body != null) body.accept(visitor);
- }
-
- Token getBeginToken() => beginToken;
-
- Token getEndToken() => endToken;
-}
-
-class MixinApplication extends Node {
- final TypeAnnotation superclass;
- final NodeList mixins;
-
- MixinApplication(this.superclass, this.mixins);
-
- MixinApplication asMixinApplication() => this;
-
- accept(Visitor visitor) => visitor.visitMixinApplication(this);
-
- visitChildren(Visitor visitor) {
- if (superclass != null) superclass.accept(visitor);
- if (mixins != null) mixins.accept(visitor);
- }
-
- Token getBeginToken() => superclass.getBeginToken();
- Token getEndToken() => mixins.getEndToken();
-}
-
-// TODO(kasperl): Let this share some structure with the typedef for function
-// type aliases?
-class NamedMixinApplication extends Node implements MixinApplication {
- final Identifier name;
- final NodeList typeParameters;
-
- final Modifiers modifiers;
- final MixinApplication mixinApplication;
- final NodeList interfaces;
-
- final Token classKeyword;
- final Token endToken;
-
- NamedMixinApplication(this.name, this.typeParameters,
- this.modifiers, this.mixinApplication, this.interfaces,
- this.classKeyword, this.endToken);
-
- TypeAnnotation get superclass => mixinApplication.superclass;
- NodeList get mixins => mixinApplication.mixins;
-
- MixinApplication asMixinApplication() => this;
- NamedMixinApplication asNamedMixinApplication() => this;
-
- accept(Visitor visitor) => visitor.visitNamedMixinApplication(this);
-
- visitChildren(Visitor visitor) {
- name.accept(visitor);
- if (typeParameters != null) typeParameters.accept(visitor);
- if (modifiers != null) modifiers.accept(visitor);
- if (interfaces != null) interfaces.accept(visitor);
- mixinApplication.accept(visitor);
- }
-
- Token getBeginToken() => classKeyword;
- Token getEndToken() => endToken;
-}
-
-abstract class Expression extends Node {
- Expression();
-
- Expression asExpression() => this;
-
- // TODO(ahe): make class abstract instead of adding an abstract method.
- accept(Visitor visitor);
-}
-
-abstract class Statement extends Node {
- Statement();
-
- Statement asStatement() => this;
-
- // TODO(ahe): make class abstract instead of adding an abstract method.
- accept(Visitor visitor);
-
- bool isValidBreakTarget() => true;
-}
-
-/// Erroneous expression that behaves as a literal null.
-class ErrorExpression extends LiteralNull {
- ErrorExpression(token)
- : super(token);
-
- ErrorExpression asErrorExpression() => this;
-
- bool get isErroneous => true;
-}
-
-/**
- * A message send aka method invocation. In Dart, most operations can
- * (and should) be considered as message sends. Getters and setters
- * are just methods with a special syntax. Consequently, we model
- * property access, assignment, operators, and method calls with this
- * one node.
- */
-class Send extends Expression with StoredTreeElementMixin {
- final Node receiver;
- final Node selector;
- final NodeList argumentsNode;
- Link<Node> get arguments => argumentsNode.nodes;
-
- Send([this.receiver, this.selector, this.argumentsNode]);
- Send.postfix(this.receiver, this.selector, [Node argument = null])
- : argumentsNode = (argument == null)
- ? new Postfix()
- : new Postfix.singleton(argument);
- Send.prefix(this.receiver, this.selector, [Node argument = null])
- : argumentsNode = (argument == null)
- ? new Prefix()
- : new Prefix.singleton(argument);
-
- Send asSend() => this;
-
- accept(Visitor visitor) => visitor.visitSend(this);
-
- visitChildren(Visitor visitor) {
- if (receiver != null) receiver.accept(visitor);
- if (selector != null) selector.accept(visitor);
- if (argumentsNode != null) argumentsNode.accept(visitor);
- }
-
- int argumentCount() {
- return (argumentsNode == null) ? -1 : argumentsNode.slowLength();
- }
-
- bool get isSuperCall {
- return receiver != null && receiver.isSuper();
- }
- bool get isOperator => selector is Operator;
- bool get isPropertyAccess => argumentsNode == null;
- bool get isFunctionObjectInvocation => selector == null;
- bool get isPrefix => argumentsNode is Prefix;
- bool get isPostfix => argumentsNode is Postfix;
- bool get isCall => !isOperator && !isPropertyAccess;
- bool get isIndex =>
- isOperator && identical(selector.asOperator().source, '[]');
- bool get isLogicalAnd =>
- isOperator && identical(selector.asOperator().source, '&&');
- bool get isLogicalOr =>
- isOperator && identical(selector.asOperator().source, '||');
-
- bool get isTypeCast {
- return isOperator
- && identical(selector.asOperator().source, 'as');
- }
-
- bool get isTypeTest {
- return isOperator
- && identical(selector.asOperator().source, 'is');
- }
-
- bool get isIsNotCheck {
- return isTypeTest && arguments.head.asSend() != null;
- }
-
- TypeAnnotation get typeAnnotationFromIsCheckOrCast {
- assert(isOperator);
- assert(identical(selector.asOperator().source, 'is') ||
- identical(selector.asOperator().source, 'as'));
- return isIsNotCheck
- ? arguments.head.asSend().receiver
- : arguments.head;
- }
-
- Token getBeginToken() {
- if (isPrefix && !isIndex) return selector.getBeginToken();
- return firstBeginToken(receiver, selector);
- }
-
- Token getEndToken() {
- if (isPrefix) {
- if (receiver != null) return receiver.getEndToken();
- if (selector != null) return selector.getEndToken();
- return null;
- }
- if (!isPostfix && argumentsNode != null) {
- Token token = argumentsNode.getEndToken();
- if (token != null) return token;
- }
- if (selector != null) return selector.getEndToken();
- return getBeginToken();
- }
-
- Send copyWithReceiver(Node newReceiver) {
- assert(receiver == null);
- return new Send(newReceiver, selector, argumentsNode);
- }
-}
-
-class Postfix extends NodeList {
- Postfix() : super(null, const Link<Node>());
- Postfix.singleton(Node argument) : super.singleton(argument);
-}
-
-class Prefix extends NodeList {
- Prefix() : super(null, const Link<Node>());
- Prefix.singleton(Node argument) : super.singleton(argument);
-}
-
-class SendSet extends Send {
- final Operator assignmentOperator;
- SendSet(receiver, selector, this.assignmentOperator, argumentsNode)
- : super(receiver, selector, argumentsNode);
- SendSet.postfix(receiver,
- selector,
- this.assignmentOperator,
- [Node argument = null])
- : super.postfix(receiver, selector, argument);
- SendSet.prefix(receiver,
- selector,
- this.assignmentOperator,
- [Node argument = null])
- : super.prefix(receiver, selector, argument);
-
- SendSet asSendSet() => this;
-
- accept(Visitor visitor) => visitor.visitSendSet(this);
-
- visitChildren(Visitor visitor) {
- super.visitChildren(visitor);
- if (assignmentOperator != null) assignmentOperator.accept(visitor);
- }
-
- Send copyWithReceiver(Node newReceiver) {
- assert(receiver == null);
- return new SendSet(newReceiver, selector, assignmentOperator,
- argumentsNode);
- }
-
- Token getBeginToken() {
- if (isPrefix) return assignmentOperator.getBeginToken();
- return super.getBeginToken();
- }
-
- Token getEndToken() {
- if (isPostfix) return assignmentOperator.getEndToken();
- return super.getEndToken();
- }
-}
-
-class NewExpression extends Expression {
- /** The token NEW or CONST or `null` for metadata */
- final Token newToken;
-
- // Note: we expect that send.receiver is null.
- final Send send;
-
- NewExpression([this.newToken, this.send]);
-
- NewExpression asNewExpression() => this;
-
- accept(Visitor visitor) => visitor.visitNewExpression(this);
-
- visitChildren(Visitor visitor) {
- if (send != null) send.accept(visitor);
- }
-
- bool get isConst {
- return newToken == null || identical(newToken.stringValue, 'const');
- }
-
- Token getBeginToken() => newToken != null ? newToken : send.getBeginToken();
-
- Token getEndToken() => send.getEndToken();
-}
-
-class NodeList extends Node {
- final Link<Node> nodes;
- final Token beginToken;
- final Token endToken;
- final String delimiter;
- bool get isEmpty => nodes.isEmpty;
-
- NodeList([this.beginToken, this.nodes, this.endToken, this.delimiter]);
-
- Iterator<Node> get iterator => nodes.iterator;
-
- NodeList.singleton(Node node) : this(null, const Link<Node>().prepend(node));
- NodeList.empty() : this(null, const Link<Node>());
-
- NodeList asNodeList() => this;
-
- int slowLength() {
- int result = 0;
- for (Link<Node> cursor = nodes; !cursor.isEmpty; cursor = cursor.tail) {
- result++;
- }
- return result;
- }
-
- accept(Visitor visitor) => visitor.visitNodeList(this);
-
- visitChildren(Visitor visitor) {
- if (nodes == null) return;
- for (Link<Node> link = nodes; !link.isEmpty; link = link.tail) {
- if (link.head != null) link.head.accept(visitor);
- }
- }
-
- Token getBeginToken() {
- if (beginToken != null) return beginToken;
- if (nodes != null) {
- for (Link<Node> link = nodes; !link.isEmpty; link = link.tail) {
- if (link.head.getBeginToken() != null) {
- return link.head.getBeginToken();
- }
- if (link.head.getEndToken() != null) {
- return link.head.getEndToken();
- }
- }
- }
- return endToken;
- }
-
- Token getEndToken() {
- if (endToken != null) return endToken;
- if (nodes != null) {
- Link<Node> link = nodes;
- if (link.isEmpty) return beginToken;
- while (!link.tail.isEmpty) link = link.tail;
- Node lastNode = link.head;
- if (lastNode != null) {
- if (lastNode.getEndToken() != null) return lastNode.getEndToken();
- if (lastNode.getBeginToken() != null) return lastNode.getBeginToken();
- }
- }
- return beginToken;
- }
-}
-
-class Block extends Statement {
- final NodeList statements;
-
- Block(this.statements);
-
- Block asBlock() => this;
-
- accept(Visitor visitor) => visitor.visitBlock(this);
-
- visitChildren(Visitor visitor) {
- if (statements != null) statements.accept(visitor);
- }
-
- Token getBeginToken() => statements.getBeginToken();
-
- Token getEndToken() => statements.getEndToken();
-}
-
-class If extends Statement {
- final ParenthesizedExpression condition;
- final Statement thenPart;
- final Statement elsePart;
-
- final Token ifToken;
- final Token elseToken;
-
- If(this.condition, this.thenPart, this.elsePart,
- this.ifToken, this.elseToken);
-
- If asIf() => this;
-
- bool get hasElsePart => elsePart != null;
-
- accept(Visitor visitor) => visitor.visitIf(this);
-
- visitChildren(Visitor visitor) {
- if (condition != null) condition.accept(visitor);
- if (thenPart != null) thenPart.accept(visitor);
- if (elsePart != null) elsePart.accept(visitor);
- }
-
- Token getBeginToken() => ifToken;
-
- Token getEndToken() {
- if (elsePart == null) return thenPart.getEndToken();
- return elsePart.getEndToken();
- }
-}
-
-class Conditional extends Expression {
- final Expression condition;
- final Expression thenExpression;
- final Expression elseExpression;
-
- final Token questionToken;
- final Token colonToken;
-
- Conditional(this.condition, this.thenExpression,
- this.elseExpression, this.questionToken, this.colonToken);
-
- Conditional asConditional() => this;
-
- accept(Visitor visitor) => visitor.visitConditional(this);
-
- visitChildren(Visitor visitor) {
- condition.accept(visitor);
- thenExpression.accept(visitor);
- elseExpression.accept(visitor);
- }
-
- Token getBeginToken() => condition.getBeginToken();
-
- Token getEndToken() => elseExpression.getEndToken();
-}
-
-class For extends Loop {
- /** Either a variable declaration or an expression. */
- final Node initializer;
- /** Either an expression statement or an empty statement. */
- final Statement conditionStatement;
- final NodeList update;
-
- final Token forToken;
-
- For(this.initializer, this.conditionStatement, this.update, body,
- this.forToken) : super(body);
-
- For asFor() => this;
-
- Expression get condition {
- ExpressionStatement expressionStatement =
- conditionStatement.asExpressionStatement();
- if (expressionStatement != null) {
- return expressionStatement.expression;
- } else {
- return null;
- }
- }
-
- accept(Visitor visitor) => visitor.visitFor(this);
-
- visitChildren(Visitor visitor) {
- if (initializer != null) initializer.accept(visitor);
- if (conditionStatement != null) conditionStatement.accept(visitor);
- if (update != null) update.accept(visitor);
- if (body != null) body.accept(visitor);
- }
-
- Token getBeginToken() => forToken;
-
- 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();
-}
-
-/// Node representing the method implementation modifiers `sync*`, `async`, and
-/// `async*` or the invalid modifier `sync`.
-class AsyncModifier extends Node {
- /// The `async` or `sync` token.
- final Token asyncToken;
-
- /// The `*` token.
- final Token starToken;
-
- AsyncModifier(this.asyncToken, this.starToken);
-
- AsyncModifier asAsyncModifier() => this;
-
- accept(Visitor visitor) => visitor.visitAsyncModifier(this);
-
- visitChildren(Visitor visitor) {}
-
- Token getBeginToken() => asyncToken;
-
- Token getEndToken() => starToken != null ? starToken : asyncToken;
-
- /// Is `true` if this modifier is either `async` or `async*`.
- bool get isAsynchronous => asyncToken.value == 'async';
-
- /// Is `true` if this modifier is either `sync*` or `async*`.
- bool get isYielding => starToken != null;
-}
-
-class FunctionExpression extends Expression with StoredTreeElementMixin {
- 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;
- final AsyncModifier asyncModifier;
-
- FunctionExpression(this.name, this.parameters, this.body, this.returnType,
- this.modifiers, this.initializers, this.getOrSet,
- this.asyncModifier) {
- assert(modifiers != null);
- }
-
- FunctionExpression asFunctionExpression() => this;
-
- accept(Visitor visitor) => visitor.visitFunctionExpression(this);
-
- bool get isRedirectingFactory {
- return body != null && body.asRedirectingFactoryBody() != null;
- }
-
- 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 (asyncModifier != null) asyncModifier.accept(visitor);
- if (body != null) body.accept(visitor);
- }
-
- bool hasBody() => body.asEmptyStatement() == null;
-
- bool hasEmptyBody() {
- Block block = body.asBlock();
- if (block == null) return false;
- return block.statements.isEmpty;
- }
-
- 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);
-
-abstract class Literal<T> extends Expression {
- final Token token;
- final DecodeErrorHandler handler;
-
- Literal(Token this.token, DecodeErrorHandler this.handler);
-
- 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 (identical(valueToken.kind, PLUS_TOKEN)) valueToken = valueToken.next;
- return int.parse(valueToken.value);
- } on FormatException catch (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 (identical(valueToken.kind, PLUS_TOKEN)) valueToken = valueToken.next;
- return double.parse(valueToken.value);
- } on FormatException catch (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 (identical(token.stringValue, 'true')) return true;
- if (identical(token.stringValue, 'false')) return false;
- (this.handler)(token, "not a bool ${token.value}");
- throw false;
- }
-
- accept(Visitor visitor) => visitor.visitLiteralBool(this);
-}
-
-
-class StringQuoting {
-
- /// Cache of common quotings.
- static const List<StringQuoting> _mapping = const <StringQuoting>[
- const StringQuoting($SQ, raw: false, leftQuoteLength: 1),
- const StringQuoting($SQ, raw: true, leftQuoteLength: 1),
- const StringQuoting($DQ, raw: false, leftQuoteLength: 1),
- const StringQuoting($DQ, raw: true, leftQuoteLength: 1),
- // No string quotes with 2 characters.
- null,
- null,
- null,
- null,
- // Multiline quotings.
- const StringQuoting($SQ, raw: false, leftQuoteLength: 3),
- const StringQuoting($SQ, raw: true, leftQuoteLength: 3),
- const StringQuoting($DQ, raw: false, leftQuoteLength: 3),
- const StringQuoting($DQ, raw: true, leftQuoteLength: 3),
- // Leading single whitespace or espaped newline.
- const StringQuoting($SQ, raw: false, leftQuoteLength: 4),
- const StringQuoting($SQ, raw: true, leftQuoteLength: 4),
- const StringQuoting($DQ, raw: false, leftQuoteLength: 4),
- const StringQuoting($DQ, raw: true, leftQuoteLength: 4),
- // Other combinations of leading whitespace and/or escaped newline.
- const StringQuoting($SQ, raw: false, leftQuoteLength: 5),
- const StringQuoting($SQ, raw: true, leftQuoteLength: 5),
- const StringQuoting($DQ, raw: false, leftQuoteLength: 5),
- const StringQuoting($DQ, raw: true, leftQuoteLength: 5),
- const StringQuoting($SQ, raw: false, leftQuoteLength: 6),
- const StringQuoting($SQ, raw: true, leftQuoteLength: 6),
- const StringQuoting($DQ, raw: false, leftQuoteLength: 6),
- const StringQuoting($DQ, raw: true, leftQuoteLength: 6)
- ];
-
- final bool raw;
- final int leftQuoteCharCount;
- final int quote;
- const StringQuoting(this.quote, { this.raw, int leftQuoteLength })
- : this.leftQuoteCharCount = leftQuoteLength;
- String get quoteChar => identical(quote, $DQ) ? '"' : "'";
-
- int get leftQuoteLength => (raw ? 1 : 0) + leftQuoteCharCount;
- int get rightQuoteLength => (leftQuoteCharCount > 2) ? 3 : 1;
- static StringQuoting getQuoting(int quote, bool raw, int leftQuoteLength) {
- int quoteKindOffset = (quote == $DQ) ? 2 : 0;
- int rawOffset = raw ? 1 : 0;
- int index = (leftQuoteLength - 1) * 4 + rawOffset + quoteKindOffset;
- if (index < _mapping.length) return _mapping[index];
- return new StringQuoting(quote, raw: raw, leftQuoteLength: leftQuoteLength);
- }
-}
-
-/**
- * Superclass for classes representing string literals.
- */
-abstract class StringNode extends Expression {
- DartString get dartString;
- 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;
-
- Token getBeginToken() => token;
- Token getEndToken() => token;
-
- accept(Visitor visitor) => visitor.visitLiteralString(this);
-}
-
-class LiteralNull extends Literal<String> {
- LiteralNull(Token token) : super(token, null);
-
- LiteralNull asLiteralNull() => this;
-
- String get value => null;
-
- accept(Visitor visitor) => visitor.visitLiteralNull(this);
-}
-
-class LiteralList extends Expression {
- final NodeList typeArguments;
- final NodeList elements;
-
- final Token constKeyword;
-
- LiteralList(this.typeArguments, this.elements, this.constKeyword);
-
- bool get isConst => constKeyword != null;
-
- LiteralList asLiteralList() => this;
- accept(Visitor visitor) => visitor.visitLiteralList(this);
-
- visitChildren(Visitor visitor) {
- if (typeArguments != null) typeArguments.accept(visitor);
- elements.accept(visitor);
- }
-
- Token getBeginToken() {
- if (constKeyword != null) return constKeyword;
- return firstBeginToken(typeArguments, elements);
- }
-
- Token getEndToken() => elements.getEndToken();
-}
-
-class LiteralSymbol extends Expression {
- final Token hashToken;
- final NodeList identifiers;
-
- LiteralSymbol(this.hashToken, this.identifiers);
-
- LiteralSymbol asLiteralSymbol() => this;
-
- void visitChildren(Visitor visitor) {
- if (identifiers != null) identifiers.accept(visitor);
- }
-
- accept(Visitor visitor) => visitor.visitLiteralSymbol(this);
-
- Token getBeginToken() => hashToken;
-
- Token getEndToken() => identifiers.getEndToken();
-
- String get slowNameString {
- Unparser unparser = new Unparser();
- unparser.unparseNodeListOfIdentifiers(identifiers);
- return unparser.result;
- }
-}
-
-class Identifier extends Expression with StoredTreeElementMixin {
- final Token token;
-
- String get source => token.value;
-
- Identifier(Token this.token);
-
- bool isThis() => identical(source, 'this');
-
- bool isSuper() => identical(source, 'super');
-
- Identifier asIdentifier() => this;
-
- accept(Visitor visitor) => visitor.visitIdentifier(this);
-
- visitChildren(Visitor visitor) {}
-
- Token getBeginToken() => token;
-
- Token getEndToken() => token;
-}
-
-class Operator extends Identifier {
- static const COMPLEX_OPERATORS =
- const ["--", "++", '+=', "-=", "*=", "/=", "%=", "&=", "|=", "~/=", "^=",
- ">>=", "<<="];
-
- static const INCREMENT_OPERATORS = const <String>["++", "--"];
-
- Operator(Token token) : super(token);
-
- Operator asOperator() => this;
-
- accept(Visitor visitor) => visitor.visitOperator(this);
-}
-
-class Return extends Statement {
- final Node 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 Yield extends Statement {
- final Node expression;
- final Token yieldToken;
- final Token starToken;
- final Token endToken;
-
- Yield(this.yieldToken, this.starToken, this.expression, this.endToken);
-
- Yield asYield() => this;
-
- bool get hasStar => starToken != null;
-
- accept(Visitor visitor) => visitor.visitYield(this);
-
- visitChildren(Visitor visitor) {
- expression.accept(visitor);
- }
-
- Token getBeginToken() => yieldToken;
-
- Token getEndToken() => endToken;
-}
-
-class RedirectingFactoryBody extends Statement with StoredTreeElementMixin {
- final Node constructorReference;
- final Token beginToken;
- final Token endToken;
-
- RedirectingFactoryBody(this.beginToken, this.endToken,
- this.constructorReference);
-
- RedirectingFactoryBody asRedirectingFactoryBody() => this;
-
- accept(Visitor visitor) => visitor.visitRedirectingFactoryBody(this);
-
- visitChildren(Visitor visitor) {
- constructorReference.accept(visitor);
- }
-
- Token getBeginToken() => beginToken;
-
- Token getEndToken() => 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 Expression {
- 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) {
- expression.accept(visitor);
- }
-
- Token getBeginToken() => throwToken;
-
- Token getEndToken() => endToken;
-}
-
-class Await extends Expression {
- final Expression expression;
-
- final Token awaitToken;
-
- Await(this.awaitToken, this.expression);
-
- Await asAwait() => this;
-
- accept(Visitor visitor) => visitor.visitAwait(this);
-
- visitChildren(Visitor visitor) {
- expression.accept(visitor);
- }
-
- Token getBeginToken() => awaitToken;
-
- Token getEndToken() => expression.getEndToken();
-}
-
-class Rethrow extends Statement {
- final Token throwToken;
- final Token endToken;
-
- Rethrow(this.throwToken, this.endToken);
-
- Rethrow asRethrow() => this;
-
- accept(Visitor visitor) => visitor.visitRethrow(this);
- visitChildren(Visitor 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 NodeList metadata;
- final TypeAnnotation type;
- final Modifiers modifiers;
- final NodeList definitions;
-
- VariableDefinitions(this.type,
- this.modifiers,
- this.definitions)
- : this.metadata = null {
- assert(modifiers != null);
- }
-
- // TODO(johnniwinther): Make this its own node type.
- VariableDefinitions.forParameter(this.metadata,
- this.type,
- this.modifiers,
- this.definitions) {
- assert(modifiers != null);
- }
-
- VariableDefinitions asVariableDefinitions() => this;
-
- accept(Visitor visitor) => visitor.visitVariableDefinitions(this);
-
- visitChildren(Visitor visitor) {
- if (metadata != null) metadata.accept(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() => definitions.getEndToken();
-}
-
-abstract class Loop extends Statement {
- 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 {
- /**
- * Pseudo-constant for empty modifiers.
- */
- static final Modifiers EMPTY = new Modifiers(new NodeList.empty());
-
- /* 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 const int FLAG_STATIC = 1;
- static const int FLAG_ABSTRACT = FLAG_STATIC << 1;
- static const int FLAG_FINAL = FLAG_ABSTRACT << 1;
- static const int FLAG_VAR = FLAG_FINAL << 1;
- static const int FLAG_CONST = FLAG_VAR << 1;
- static const int FLAG_FACTORY = FLAG_CONST << 1;
- static const int FLAG_EXTERNAL = FLAG_FACTORY << 1;
-
- Modifiers(NodeList nodes) : this.withFlags(nodes, computeFlags(nodes.nodes));
-
- 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;
- if (identical(value, 'static')) flags |= FLAG_STATIC;
- else if (identical(value, 'abstract')) flags |= FLAG_ABSTRACT;
- else if (identical(value, 'final')) flags |= FLAG_FINAL;
- else if (identical(value, 'var')) flags |= FLAG_VAR;
- else if (identical(value, 'const')) flags |= FLAG_CONST;
- else if (identical(value, 'factory')) flags |= FLAG_FACTORY;
- else if (identical(value, 'external')) flags |= FLAG_EXTERNAL;
- else throw 'internal error: ${nodes.head}';
- }
- return flags;
- }
-
- Node findModifier(String modifier) {
- Link<Node> nodeList = nodes.nodes;
- for (; !nodeList.isEmpty; nodeList = nodeList.tail) {
- String value = nodeList.head.asIdentifier().source;
- if(identical(value, modifier)) {
- return nodeList.head;
- }
- }
- return null;
- }
-
- Modifiers asModifiers() => this;
- Token getBeginToken() => nodes.getBeginToken();
- Token getEndToken() => nodes.getEndToken();
- accept(Visitor visitor) => visitor.visitModifiers(this);
- visitChildren(Visitor visitor) => nodes.accept(visitor);
-
- bool get isStatic => (flags & FLAG_STATIC) != 0;
- bool get isAbstract => (flags & FLAG_ABSTRACT) != 0;
- bool get isFinal => (flags & FLAG_FINAL) != 0;
- bool get isVar => (flags & FLAG_VAR) != 0;
- bool get isConst => (flags & FLAG_CONST) != 0;
- bool get isFactory => (flags & FLAG_FACTORY) != 0;
- bool get isExternal => (flags & FLAG_EXTERNAL) != 0;
-
- Node getStatic() => findModifier('static');
-
- /**
- * Use this to check if the declaration is either explicitly or implicitly
- * final.
- */
- bool get isFinalOrConst => isFinal || isConst;
-
- String toString() {
- return modifiersToString(isStatic: isStatic,
- isAbstract: isAbstract,
- isFinal: isFinal,
- isVar: isVar,
- isConst: isConst,
- isFactory: isFactory,
- isExternal: isExternal);
- }
-}
-
-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 SpannableAssertionFailure(
- 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 get 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();
- }
- }
-}
-
-abstract 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.
- 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 with StoredTreeElementMixin {
- final Node declaredIdentifier;
- final Expression expression;
-
- final Token awaitToken;
- final Token forToken;
- final Token inToken;
-
- ForIn(this.declaredIdentifier, this.expression,
- Statement body, this.awaitToken, this.forToken, this.inToken)
- : super(body);
-
- bool get isAsync => awaitToken != null;
-
- 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() => awaitToken != null ? awaitToken : forToken;
-
- Token getEndToken() => body.getEndToken();
-}
-
-class Label extends Node {
- final Identifier identifier;
- final Token colonToken;
-
- Label(this.identifier, this.colonToken);
-
- String get labelName => identifier.source;
-
- 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();
-}
-
-abstract class LibraryTag extends Node {
- final Link<MetadataAnnotation> metadata;
-
- LibraryTag(this.metadata);
-
- bool get isLibraryName => false;
- bool get isImport => false;
- bool get isExport => false;
- bool get isPart => false;
- bool get isPartOf => false;
-}
-
-class LibraryName extends LibraryTag {
- final Expression name;
-
- final Token libraryKeyword;
-
- LibraryName(this.libraryKeyword,
- this.name,
- Link<MetadataAnnotation> metadata)
- : super(metadata);
-
- bool get isLibraryName => true;
-
- LibraryName asLibraryName() => this;
-
- accept(Visitor visitor) => visitor.visitLibraryName(this);
-
- visitChildren(Visitor visitor) => name.accept(visitor);
-
- Token getBeginToken() => libraryKeyword;
-
- Token getEndToken() => name.getEndToken().next;
-}
-
-/**
- * This tag describes a dependency between one library and the exported
- * identifiers of another library. The other library is specified by the [uri].
- * Combinators filter away some identifiers from the other library.
- */
-abstract class LibraryDependency extends LibraryTag {
- final StringNode uri;
- final NodeList combinators;
-
- LibraryDependency(this.uri,
- this.combinators,
- Link<MetadataAnnotation> metadata)
- : super(metadata);
-
- LibraryDependency asLibraryDependency() => this;
-}
-
-/**
- * An [:import:] library tag.
- *
- * An import tag is dependency on another library where the exported identifiers
- * are put into the import scope of the importing library. The import scope is
- * only visible inside the library.
- */
-class Import extends LibraryDependency {
- final Identifier prefix;
- final Token importKeyword;
- final bool isDeferred;
-
- Import(this.importKeyword, StringNode uri,
- this.prefix, NodeList combinators,
- Link<MetadataAnnotation> metadata,
- {this.isDeferred})
- : super(uri, combinators, metadata);
-
- bool get isImport => true;
-
- Import asImport() => this;
-
- accept(Visitor visitor) => visitor.visitImport(this);
-
- visitChildren(Visitor visitor) {
- uri.accept(visitor);
- if (prefix != null) prefix.accept(visitor);
- if (combinators != null) combinators.accept(visitor);
- }
-
- Token getBeginToken() => importKeyword;
-
- Token getEndToken() {
- if (combinators != null) return combinators.getEndToken().next;
- if (prefix != null) return prefix.getEndToken().next;
- return uri.getEndToken().next;
- }
-}
-
-/**
- * An [:export:] library tag.
- *
- * An export tag is dependency on another library where the exported identifiers
- * are put into the export scope of the exporting library. The export scope is
- * not visible inside the library.
- */
-class Export extends LibraryDependency {
- final Token exportKeyword;
-
- Export(this.exportKeyword,
- StringNode uri,
- NodeList combinators,
- Link<MetadataAnnotation> metadata)
- : super(uri, combinators, metadata);
-
- bool get isExport => true;
-
- Export asExport() => this;
-
- accept(Visitor visitor) => visitor.visitExport(this);
-
- visitChildren(Visitor visitor) {
- uri.accept(visitor);
- if (combinators != null) combinators.accept(visitor);
- }
-
- Token getBeginToken() => exportKeyword;
-
- Token getEndToken() {
- if (combinators != null) return combinators.getEndToken().next;
- return uri.getEndToken().next;
- }
-}
-
-class Part extends LibraryTag {
- final StringNode uri;
-
- final Token partKeyword;
-
- Part(this.partKeyword, this.uri, Link<MetadataAnnotation> metadata)
- : super(metadata);
-
- bool get isPart => true;
-
- Part asPart() => this;
-
- accept(Visitor visitor) => visitor.visitPart(this);
-
- visitChildren(Visitor visitor) => uri.accept(visitor);
-
- Token getBeginToken() => partKeyword;
-
- Token getEndToken() => uri.getEndToken().next;
-}
-
-class PartOf extends Node {
- final Expression name;
-
- final Token partKeyword;
-
- final Link<MetadataAnnotation> metadata;
-
- PartOf(this.partKeyword, this.name, this.metadata);
-
- Token get ofKeyword => partKeyword.next;
-
- bool get isPartOf => true;
-
- PartOf asPartOf() => this;
-
- accept(Visitor visitor) => visitor.visitPartOf(this);
-
- visitChildren(Visitor visitor) => name.accept(visitor);
-
- Token getBeginToken() => partKeyword;
-
- Token getEndToken() => name.getEndToken().next;
-}
-
-class Combinator extends Node {
- final NodeList identifiers;
-
- final Token keywordToken;
-
- Combinator(this.identifiers, this.keywordToken);
-
- bool get isShow => identical(keywordToken.stringValue, 'show');
-
- bool get isHide => identical(keywordToken.stringValue, 'hide');
-
- Combinator asCombinator() => this;
-
- accept(Visitor visitor) => visitor.visitCombinator(this);
-
- visitChildren(Visitor visitor) => identifiers.accept(visitor);
-
- Token getBeginToken() => keywordToken;
-
- Token getEndToken() => identifiers.getEndToken();
-}
-
-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 TypeAnnotation type;
- final NodeList formals;
- final Block block;
-
- final Token onKeyword;
- final Token catchKeyword;
-
- CatchBlock(this.type, this.formals, this.block,
- this.onKeyword, this.catchKeyword);
-
- CatchBlock asCatchBlock() => this;
-
- accept(Visitor visitor) => visitor.visitCatchBlock(this);
-
- Node get exception {
- if (formals == null || formals.nodes.isEmpty) return null;
- VariableDefinitions declarations = formals.nodes.head;
- return declarations.definitions.nodes.head;
- }
-
- Node get trace {
- if (formals == null || 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) {
- if (type != null) type.accept(visitor);
- if (formals != null) formals.accept(visitor);
- block.accept(visitor);
- }
-
- Token getBeginToken() => onKeyword != null ? onKeyword : catchKeyword;
-
- Token getEndToken() => block.getEndToken();
-}
-
-class Metadata extends Node {
- final Token token;
- final Expression expression;
-
- Metadata(this.token, this.expression);
-
- Metadata asMetadata() => this;
-
- accept(Visitor visitor) => visitor.visitMetadata(this);
-
- visitChildren(Visitor visitor) {
- expression.accept(visitor);
- }
-
- Token getBeginToken() => token;
-
- Token getEndToken() => expression.getEndToken();
-}
-
-class Initializers {
- static bool isSuperConstructorCall(Send node) {
- return (node.receiver == null && node.selector.isSuper()) ||
- (node.receiver != null &&
- node.receiver.isSuper() &&
- node.selector.asIdentifier() != null);
- }
-
- static bool isConstructorRedirect(Send node) {
- return (node.receiver == null && node.selector.isThis()) ||
- (node.receiver != null &&
- node.receiver.isThis() &&
- node.selector.asIdentifier() != null);
- }
-}
-
-class GetDartStringVisitor extends Visitor<DartString> {
- const GetDartStringVisitor();
- DartString visitNode(Node node) => null;
- DartString visitStringJuxtaposition(StringJuxtaposition node)
- => node.dartString;
- DartString visitLiteralString(LiteralString node) => node.dartString;
-}
-
-class IsInterpolationVisitor extends Visitor<bool> {
- const IsInterpolationVisitor();
- bool visitNode(Node node) => false;
- bool visitStringInterpolation(StringInterpolation node) => true;
- bool visitStringJuxtaposition(StringJuxtaposition node)
- => node.isInterpolation;
-}
-
-/// Erroneous node used to recover from parser errors. Implements various
-/// interfaces and provides bare minimum of implementation to avoid unnecessary
-/// messages.
-class ErrorNode
- extends Node
- implements FunctionExpression, VariableDefinitions, Typedef {
- final Token token;
- final String reason;
- final Identifier name;
- final NodeList definitions;
-
- ErrorNode.internal(this.token, this.reason, this.name, this.definitions);
-
- factory ErrorNode(Token token, String reason) {
- Identifier name = new Identifier(token);
- NodeList definitions = new NodeList(
- null, const Link<Node>().prepend(name), null, null);
- return new ErrorNode.internal(token, reason, name, definitions);
- }
-
- Token get beginToken => token;
- Token get endToken => token;
-
- Token getBeginToken() => token;
-
- Token getEndToken() => token;
-
- accept(Visitor visitor) {}
-
- visitChildren(Visitor visitor) {}
-
- bool get isErroneous => true;
-
- // FunctionExpression.
- get asyncModifier => null;
- get parameters => null;
- get body => null;
- get returnType => null;
- get modifiers => Modifiers.EMPTY;
- get initializers => null;
- get getOrSet => null;
- get isRedirectingFactory => false;
- bool hasBody() => false;
- bool hasEmptyBody() => false;
-
- // VariableDefinitions.
- get metadata => null;
- get type => null;
-
- // Typedef.
- get typeParameters => null;
- get formals => null;
- get typedefKeyword => null;
-}
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