Move dart2js from sdk/lib/_internal/compiler to pkg/compiler

sdk/lib/_internal/compiler/implementation/tree/unparser.dart

Index: sdk/lib/_internal/compiler/implementation/tree/unparser.dart
diff --git a/sdk/lib/_internal/compiler/implementation/tree/unparser.dart b/sdk/lib/_internal/compiler/implementation/tree/unparser.dart
deleted file mode 100644
index b4ce89d0e0e2d87bc22dd965363e1d85bd6bcaf9..0000000000000000000000000000000000000000
--- a/sdk/lib/_internal/compiler/implementation/tree/unparser.dart
+++ /dev/null
@@ -1,830 +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;
-
-String unparse(Node node, {minify: true}) {
-  Unparser unparser = new Unparser(minify: minify);
-  unparser.unparse(node);
-  return unparser.result;
-}
-
-class Unparser extends Indentation implements Visitor {
-  final StringBuffer sb = new StringBuffer();
-
-  String get result => sb.toString();
-
-  Unparser({this.minify: true, this.stripTypes: false});
-
-  bool minify;
-  bool stripTypes;
-
-  void newline() {
-    if (!minify) {
-      sb.write("\n");
-      onEmptyLine = true;
-    }
-  }
-
-  void space([String token = " "]) {
-    write(minify ? "" : token);
-  }
-
-  void addToken(Token token) {
-    if (token == null) return;
-    write(token.value);
-    if (identical(token.kind, KEYWORD_TOKEN)
-        || identical(token.kind, IDENTIFIER_TOKEN)) {
-      write(' ');
-    }
-  }
-
-  bool onEmptyLine = true;
-
-  write(object) {
-    String s = object.toString();
-    if (s == '') return;
-    if (onEmptyLine) {
-      sb.write(indentation);
-    }
-    sb.write(s);
-    onEmptyLine = false;
-  }
-
-  unparse(Node node) { visit(node); }
-
-  visit(Node node) {
-    if (node != null) node.accept(this);
-  }
-
-  visitBlock(Block node) => unparseBlockStatements(node.statements);
-
-  unparseBlockStatements(NodeList statements) {
-    addToken(statements.beginToken);
-
-    Link<Node> nodes = statements.nodes;
-    if (nodes != null && !nodes.isEmpty) {
-      indentMore();
-      newline();
-      visit(nodes.head);
-      String delimiter =
-        (statements.delimiter == null) ? "" : "${statements.delimiter}";
-      for (Link link = nodes.tail; !link.isEmpty; link = link.tail) {
-        newline();
-        visit(link.head);
-      }
-      indentLess();
-      newline();
-    }
-    if (statements.endToken != null) {
-      write(statements.endToken.value);
-    }
-  }
-
-
-  visitCascade(Cascade node) {
-    visit(node.expression);
-  }
-
-  visitCascadeReceiver(CascadeReceiver node) {
-    visit(node.expression);
-  }
-
-  unparseClassWithBody(ClassNode node, members) {
-    if (!node.modifiers.nodes.isEmpty) {
-      visit(node.modifiers);
-      write(' ');
-    }
-    write('class ');
-    visit(node.name);
-    if (node.typeParameters != null) {
-      visit(node.typeParameters);
-    }
-    if (node.extendsKeyword != null) {
-      write(' ');
-      addToken(node.extendsKeyword);
-      visit(node.superclass);
-    }
-    if (!node.interfaces.isEmpty) {
-      write(' ');
-      visit(node.interfaces);
-    }
-    space();
-    write('{');
-    if (!members.isEmpty) {
-      newline();
-      indentMore();
-      for (Node member in members) {
-        visit(member);
-        newline();
-      }
-      indentLess();
-    }
-    write('}');
-  }
-
-  visitClassNode(ClassNode node) {
-    unparseClassWithBody(node, node.body.nodes);
-  }
-
-  visitMixinApplication(MixinApplication node) {
-    visit(node.superclass);
-    write(' with ');
-    visit(node.mixins);
-  }
-
-  visitNamedMixinApplication(NamedMixinApplication node) {
-    if (!node.modifiers.nodes.isEmpty) {
-      visit(node.modifiers);
-      write(' ');
-    }
-    write('class ');
-    visit(node.name);
-    if (node.typeParameters != null) {
-      visit(node.typeParameters);
-    }
-    write(' = ');
-    visit(node.mixinApplication);
-    if (node.interfaces != null) {
-      write(' implements ');
-      visit(node.interfaces);
-    }
-    write(';');
-  }
-
-  visitConditional(Conditional node) {
-    visit(node.condition);
-    space();
-    write(node.questionToken.value);
-    space();
-    visit(node.thenExpression);
-    space();
-    write(node.colonToken.value);
-    space();
-    visit(node.elseExpression);
-  }
-
-  visitExpressionStatement(ExpressionStatement node) {
-    visit(node.expression);
-    write(node.endToken.value);
-  }
-
-  visitFor(For node) {
-    write(node.forToken.value);
-    space();
-    write('(');
-    visit(node.initializer);
-    write(';');
-    if (node.conditionStatement is! EmptyStatement) space();
-    visit(node.conditionStatement);
-    if (!node.update.nodes.isEmpty) space();
-    visit(node.update);
-    write(')');
-    space();
-    visit(node.body);
-  }
-
-  visitFunctionDeclaration(FunctionDeclaration node) {
-    visit(node.function);
-  }
-
-  void unparseFunctionName(Node name) {
-    // TODO(antonm): that's a workaround as currently FunctionExpression
-    // names are modelled with Send and it emits operator[] as only
-    // operator, without [] which are expected to be emitted with
-    // arguments.
-    if (name is Send) {
-      Send send = name;
-      assert(send is !SendSet);
-      if (!send.isOperator) {
-        // Looks like a factory method.
-        visit(send.receiver);
-        write('.');
-      } else {
-        visit(send.receiver);
-        Identifier identifier = send.selector.asIdentifier();
-        if (identical(identifier.token.kind, KEYWORD_TOKEN)) {
-          write(' ');
-        } else if (identifier.source == 'negate') {
-          // TODO(ahe): Remove special case for negate.
-          write(' ');
-        }
-      }
-      visit(send.selector);
-    } else {
-      visit(name);
-    }
-  }
-
-  visitAsyncModifier(AsyncModifier node) {
-    write(node.asyncToken.value);
-    if (node.starToken != null) {
-      write(node.starToken.value);
-    }
-  }
-
-  visitFunctionExpression(FunctionExpression node) {
-    if (!node.modifiers.nodes.isEmpty) {
-      visit(node.modifiers);
-      write(' ');
-    }
-    if (node.returnType != null && !stripTypes) {
-      visit(node.returnType);
-      write(' ');
-    }
-    if (node.getOrSet != null) {
-      write(node.getOrSet.value);
-      write(' ');
-    }
-    unparseFunctionName(node.name);
-    visit(node.parameters);
-    if (node.initializers != null) {
-      space();
-      write(':');
-      space();
-      unparseNodeListFrom(node.initializers, node.initializers.nodes,
-          spaces: true);
-    }
-    visit(node.asyncModifier);
-    if (node.body != null && node.body is! EmptyStatement) space();
-    visit(node.body);
-  }
-
-  visitIdentifier(Identifier node) {
-    write(node.token.value);
-  }
-
-  visitIf(If node) {
-    write(node.ifToken.value);
-    space();
-    visit(node.condition);
-    space();
-    visit(node.thenPart);
-    if (node.hasElsePart) {
-      space();
-      write(node.elseToken.value);
-      space();
-      if (node.elsePart is !Block && minify) write(' ');
-      visit(node.elsePart);
-    }
-  }
-
-  visitLiteralBool(LiteralBool node) {
-    write(node.token.value);
-  }
-
-  visitLiteralDouble(LiteralDouble node) {
-    write(node.token.value);
-    // -Lit is represented as a send.
-    if (node.token.kind == PLUS_TOKEN) write(node.token.next.value);
-  }
-
-  visitLiteralInt(LiteralInt node) {
-    write(node.token.value);
-    // -Lit is represented as a send.
-    if (node.token.kind == PLUS_TOKEN) write(node.token.next.value);
-  }
-
-  visitLiteralString(LiteralString node) {
-    write(node.token.value);
-  }
-
-  visitStringJuxtaposition(StringJuxtaposition node) {
-    visit(node.first);
-    write(" ");
-    visit(node.second);
-  }
-
-  visitLiteralNull(LiteralNull node) {
-    write(node.token.value);
-  }
-
-  visitLiteralSymbol(LiteralSymbol node) {
-    write(node.hashToken.value);
-    unparseNodeListOfIdentifiers(node.identifiers);
-  }
-
-  unparseNodeListOfIdentifiers(NodeList node) {
-    // Manually print the list to avoid spaces around operators in unminified
-    // code.
-    Link<Node> l = node.nodes;
-    write(l.head.asIdentifier().token.value);
-    for (l = l.tail; !l.isEmpty; l = l.tail) {
-      write(".");
-      write(l.head.asIdentifier().token.value);
-    }
-  }
-
-  visitNewExpression(NewExpression node) {
-    addToken(node.newToken);
-    visit(node.send);
-  }
-
-  visitLiteralList(LiteralList node) {
-    if (node.constKeyword != null) write(node.constKeyword.value);
-    visit(node.typeArguments);
-    visit(node.elements);
-    // If list is empty, emit space after [] to disambiguate cases like []==[].
-    if (minify && node.elements.isEmpty) write(' ');
-  }
-
-  visitModifiers(Modifiers node) {
-    // Spaces are already included as delimiter.
-    unparseNodeList(node.nodes, spaces: false);
-  }
-
-  /**
-   * Unparses given NodeList starting from specific node.
-   */
-  unparseNodeListFrom(NodeList node, Link<Node> from, {bool spaces: true}) {
-    if (from.isEmpty) return;
-    String delimiter = (node.delimiter == null) ? "" : "${node.delimiter}";
-    visit(from.head);
-    for (Link link = from.tail; !link.isEmpty; link = link.tail) {
-      write(delimiter);
-      if (spaces) space();
-      visit(link.head);
-    }
-  }
-
-  unparseNodeList(NodeList node, {bool spaces: true}) {
-    addToken(node.beginToken);
-    if (node.nodes != null) {
-      unparseNodeListFrom(node, node.nodes, spaces: spaces);
-    }
-    if (node.endToken != null) write(node.endToken.value);
-  }
-
-  visitNodeList(NodeList node) {
-    unparseNodeList(node);
-  }
-
-  visitOperator(Operator node) {
-    visitIdentifier(node);
-  }
-
-  visitRedirectingFactoryBody(RedirectingFactoryBody node) {
-    space();
-    write(node.beginToken.value);
-    space();
-    visit(node.constructorReference);
-    write(node.endToken.value);
-  }
-
-  visitRethrow(Rethrow node) {
-    write('rethrow;');
-  }
-
-  visitReturn(Return node) {
-    write(node.beginToken.value);
-    if (node.hasExpression && node.beginToken.stringValue != '=>') {
-      write(' ');
-    }
-    if (node.beginToken.stringValue == '=>') space();
-    visit(node.expression);
-    if (node.endToken != null) write(node.endToken.value);
-  }
-
-  visitYield(Yield node) {
-    write(node.yieldToken);
-    write(node.starToken);
-    space();
-    visit(node.expression);
-    write(node.endToken);
-  }
-
-
-  unparseSendReceiver(Send node, {bool spacesNeeded: false}) {
-    if (node.receiver == null) return;
-    visit(node.receiver);
-    CascadeReceiver asCascadeReceiver = node.receiver.asCascadeReceiver();
-    if (asCascadeReceiver != null) {
-      newline();
-      indentMore();
-      indentMore();
-      write(asCascadeReceiver.cascadeOperator.value);
-      indentLess();
-      indentLess();
-    } else if (node.selector.asOperator() == null) {
-      write('.');
-    } else if (spacesNeeded) {
-      write(' ');
-    }
-  }
-
-  unparseSendArgument(Send node, {bool spacesNeeded: false}) {
-    if (node.argumentsNode == null) return;
-
-    if(node.isIsNotCheck) {
-      Send argNode = node.arguments.head;
-      visit(argNode.selector);
-      space();
-      visit(argNode.receiver);
-    } else {
-      if (spacesNeeded) write(' ');
-      visit(node.argumentsNode);
-    }
-  }
-
-  visitSend(Send node) {
-    Operator op = node.selector.asOperator();
-    String opString = op != null ? op.source : null;
-    bool spacesNeeded = minify
-        ? identical(opString, 'is') || identical(opString, 'as')
-        : (opString != null && !node.isPrefix && !node.isIndex);
-
-    void minusMinusSpace(Node other) {
-      if (other != null && opString == '-') {
-        Token beginToken = other.getBeginToken();
-        if (beginToken != null && beginToken.stringValue != null && beginToken.stringValue.startsWith('-')) {
-          sb.write(' ');
-          spacesNeeded = false;
-        }
-      }
-    }
-
-    if (node.isPrefix) {
-      visit(node.selector);
-      // Add a space for sequences like - -x (double unary minus).
-      minusMinusSpace(node.receiver);
-    }
-
-    unparseSendReceiver(node, spacesNeeded: spacesNeeded);
-    if (!node.isPrefix && !node.isIndex) {
-      visit(node.selector);
-    }
-    minusMinusSpace(node.argumentsNode);
-
-    unparseSendArgument(node, spacesNeeded: spacesNeeded);
-  }
-
-  visitSendSet(SendSet node) {
-    if (node.isPrefix) {
-      if (minify) {
-        write(' ');
-      }
-      visit(node.assignmentOperator);
-    }
-    unparseSendReceiver(node);
-    if (node.isIndex) {
-      write('[');
-      visit(node.arguments.head);
-      write(']');
-      if (!node.isPrefix) {
-        if (!node.isPostfix) {
-          space();
-        }
-        visit(node.assignmentOperator);
-        if (!node.isPostfix) {
-          space();
-        }
-      }
-      unparseNodeListFrom(node.argumentsNode, node.argumentsNode.nodes.tail);
-    } else {
-      visit(node.selector);
-      if (!node.isPrefix) {
-        if (!node.isPostfix && node.assignmentOperator.source != ':') {
-          space();
-        }
-        visit(node.assignmentOperator);
-        if (!node.isPostfix) {
-          space();
-        }
-        if (minify && node.assignmentOperator.source != '=') {
-          write(' ');
-        }
-      }
-      visit(node.argumentsNode);
-    }
-  }
-
-  visitThrow(Throw node) {
-    write(node.throwToken.value);
-    write(' ');
-    visit(node.expression);
-  }
-
-  visitAwait(Await node) {
-    write(node.awaitToken.value);
-    write(' ');
-    visit(node.expression);
-  }
-
-  visitTypeAnnotation(TypeAnnotation node) {
-    visit(node.typeName);
-    visit(node.typeArguments);
-  }
-
-  visitTypeVariable(TypeVariable node) {
-    visit(node.name);
-    if (node.bound != null) {
-      write(' extends ');
-      visit(node.bound);
-    }
-  }
-
-  visitVariableDefinitions(VariableDefinitions node) {
-    if (node.metadata != null) {
-      visit(node.metadata);
-      write(' ');
-    }
-    visit(node.modifiers);
-    if (!node.modifiers.nodes.isEmpty) {
-      write(' ');
-    }
-    // TODO(sigurdm): Avoid writing the space when [stripTypes], but still write
-    // it if the 'type; is var.
-    if (node.type != null) {
-      visit(node.type);
-      write(' ');
-    }
-    visit(node.definitions);
-  }
-
-  visitDoWhile(DoWhile node) {
-    write(node.doKeyword.value);
-    if (node.body is !Block) {
-      write(' ');
-    } else {
-      space();
-    }
-    visit(node.body);
-    space();
-    write(node.whileKeyword.value);
-    space();
-    visit(node.condition);
-    write(node.endToken.value);
-  }
-
-  visitWhile(While node) {
-    write(node.whileKeyword.value);
-    space();
-    visit(node.condition);
-    space();
-    visit(node.body);
-  }
-
-  visitParenthesizedExpression(ParenthesizedExpression node) {
-    write(node.getBeginToken().value);
-    visit(node.expression);
-    write(node.getEndToken().value);
-  }
-
-  visitStringInterpolation(StringInterpolation node) {
-    visit(node.string);
-    unparseNodeList(node.parts, spaces: false);
-  }
-
-  visitStringInterpolationPart(StringInterpolationPart node) {
-    write('\${'); // TODO(ahe): Preserve the real tokens.
-    visit(node.expression);
-    write('}');
-    visit(node.string);
-  }
-
-  visitEmptyStatement(EmptyStatement node) {
-    write(node.semicolonToken.value);
-  }
-
-  visitGotoStatement(GotoStatement node) {
-    write(node.keywordToken.value);
-    if (node.target != null) {
-      write(' ');
-      visit(node.target);
-    }
-    write(node.semicolonToken.value);
-  }
-
-  visitBreakStatement(BreakStatement node) {
-    visitGotoStatement(node);
-  }
-
-  visitContinueStatement(ContinueStatement node) {
-    visitGotoStatement(node);
-  }
-
-  visitForIn(ForIn node) {
-    if (node.awaitToken != null) {
-      write(node.awaitToken.value);
-      write(' ');
-    }
-    write(node.forToken.value);
-    space();
-    write('(');
-    visit(node.declaredIdentifier);
-    write(' ');
-    addToken(node.inToken);
-    visit(node.expression);
-    write(')');
-    space();
-    visit(node.body);
-  }
-
-  visitLabel(Label node) {
-    visit(node.identifier);
-    write(node.colonToken.value);
-   }
-
-  visitLabeledStatement(LabeledStatement node) {
-    visit(node.labels);
-    visit(node.statement);
-  }
-
-  visitLiteralMap(LiteralMap node) {
-    if (node.constKeyword != null) write(node.constKeyword.value);
-    if (node.typeArguments != null) visit(node.typeArguments);
-    visit(node.entries);
-  }
-
-  visitLiteralMapEntry(LiteralMapEntry node) {
-    visit(node.key);
-    write(node.colonToken.value);
-    space();
-    visit(node.value);
-  }
-
-  visitNamedArgument(NamedArgument node) {
-    visit(node.name);
-    write(node.colonToken.value);
-    space();
-    visit(node.expression);
-  }
-
-  visitSwitchStatement(SwitchStatement node) {
-    addToken(node.switchKeyword);
-    visit(node.parenthesizedExpression);
-    space();
-    unparseNodeList(node.cases, spaces: false);
-  }
-
-  visitSwitchCase(SwitchCase node) {
-    newline();
-    indentMore();
-    visit(node.labelsAndCases);
-    if (node.isDefaultCase) {
-      write('default:');
-    }
-    unparseBlockStatements(node.statements);
-    indentLess();
-  }
-
-  unparseImportTag(String uri, {String prefix,
-                                List<String> shows: const <String>[],
-                                bool isDeferred: false}) {
-    String deferredString = isDeferred ? ' deferred' : '';
-    String prefixString = prefix == null ? '' : ' as $prefix';
-    String showString = shows.isEmpty ? '' : ' show ${shows.join(", ")}';
-    write('import "$uri"$deferredString$prefixString$showString;');
-    newline();
-  }
-
-  unparseExportTag(String uri, {List<String> shows: const []}) {
-    String suffix = shows.isEmpty ? '' : ' show ${shows.join(", ")}';
-    write('export "$uri"$suffix;');
-    newline();
-  }
-
-  visitTryStatement(TryStatement node) {
-    addToken(node.tryKeyword);
-    visit(node.tryBlock);
-    visit(node.catchBlocks);
-    if (node.finallyKeyword != null) {
-      space();
-      addToken(node.finallyKeyword);
-      visit(node.finallyBlock);
-    }
-  }
-
-  visitCaseMatch(CaseMatch node) {
-    addToken(node.caseKeyword);
-    visit(node.expression);
-    write(node.colonToken.value);
-  }
-
-  visitCatchBlock(CatchBlock node) {
-    addToken(node.onKeyword);
-    if (node.type != null) {
-      visit(node.type);
-      write(' ');
-    }
-    space();
-    addToken(node.catchKeyword);
-    visit(node.formals);
-    space();
-    visit(node.block);
-  }
-
-  visitTypedef(Typedef node) {
-    addToken(node.typedefKeyword);
-    if (node.returnType != null) {
-      visit(node.returnType);
-      write(' ');
-    }
-    visit(node.name);
-    if (node.typeParameters != null) {
-      visit(node.typeParameters);
-    }
-    visit(node.formals);
-    write(node.endToken.value);
-  }
-
-  visitLibraryName(LibraryName node) {
-    addToken(node.libraryKeyword);
-    node.visitChildren(this);
-    write(node.getEndToken().value);
-    newline();
-  }
-
-  visitImport(Import node) {
-    addToken(node.importKeyword);
-    visit(node.uri);
-    if (node.isDeferred) {
-      write(' deferred');
-    }
-    if (node.prefix != null) {
-      write(' as ');
-      visit(node.prefix);
-    }
-    if (node.combinators != null) {
-      write(' ');
-      visit(node.combinators);
-    }
-    write(node.getEndToken().value);
-    newline();
-  }
-
-  visitExport(Export node) {
-    addToken(node.exportKeyword);
-    visit(node.uri);
-    if (node.combinators != null) {
-      write(' ');
-      visit(node.combinators);
-    }
-    write(node.getEndToken().value);
-    newline();
-  }
-
-  visitPart(Part node) {
-    addToken(node.partKeyword);
-    visit(node.uri);
-    write(node.getEndToken().value);
-  }
-
-  visitPartOf(PartOf node) {
-    addToken(node.partKeyword);
-    addToken(node.ofKeyword);
-    visit(node.name);
-    write(node.getEndToken().value);
-  }
-
-  visitCombinator(Combinator node) {
-    addToken(node.keywordToken);
-    visit(node.identifiers);
-  }
-
-  visitMetadata(Metadata node) {
-    addToken(node.token);
-    visit(node.expression);
-  }
-
-  visitNode(Node node) {
-    throw 'internal error'; // Should not be called.
-  }
-
-  visitExpression(Expression node) {
-    throw 'internal error'; // Should not be called.
-  }
-
-  visitLibraryTag(LibraryTag node) {
-    throw 'internal error'; // Should not be called.
-  }
-
-  visitLibraryDependency(Node node) {
-    throw 'internal error'; // Should not be called.
-  }
-
-  visitLiteral(Literal node) {
-    throw 'internal error'; // Should not be called.
-  }
-
-  visitLoop(Loop node) {
-    throw 'internal error'; // Should not be called.
-  }
-
-  visitPostfix(Postfix node) {
-    throw 'internal error'; // Should not be called.
-  }
-
-  visitPrefix(Prefix node) {
-    throw 'internal error'; // Should not be called.
-  }
-
-  visitStatement(Statement node) {
-    throw 'internal error'; // Should not be called.
-  }
-
-  visitStringNode(StringNode node) {
-    throw 'internal error'; // Should not be called.
-  }
-}