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/*
* Copyright 2013 The Closure Compiler Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.javascript.jscomp.parsing;
import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkState;
import static com.google.javascript.rhino.TypeDeclarationsIR.anyType;
import static com.google.javascript.rhino.TypeDeclarationsIR.arrayType;
import static com.google.javascript.rhino.TypeDeclarationsIR.booleanType;
import static com.google.javascript.rhino.TypeDeclarationsIR.functionType;
import static com.google.javascript.rhino.TypeDeclarationsIR.namedType;
import static com.google.javascript.rhino.TypeDeclarationsIR.numberType;
import static com.google.javascript.rhino.TypeDeclarationsIR.parameterizedType;
import static com.google.javascript.rhino.TypeDeclarationsIR.stringType;
import static com.google.javascript.rhino.TypeDeclarationsIR.undefinedType;
import static com.google.javascript.rhino.TypeDeclarationsIR.unionType;
import static com.google.javascript.rhino.TypeDeclarationsIR.voidType;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;
import com.google.common.collect.UnmodifiableIterator;
import com.google.javascript.jscomp.parsing.Config.LanguageMode;
import com.google.javascript.jscomp.parsing.parser.FeatureSet;
import com.google.javascript.jscomp.parsing.parser.FeatureSet.Feature;
import com.google.javascript.jscomp.parsing.parser.IdentifierToken;
import com.google.javascript.jscomp.parsing.parser.LiteralToken;
import com.google.javascript.jscomp.parsing.parser.TokenType;
import com.google.javascript.jscomp.parsing.parser.trees.AmbientDeclarationTree;
import com.google.javascript.jscomp.parsing.parser.trees.ArrayLiteralExpressionTree;
import com.google.javascript.jscomp.parsing.parser.trees.ArrayPatternTree;
import com.google.javascript.jscomp.parsing.parser.trees.ArrayTypeTree;
import com.google.javascript.jscomp.parsing.parser.trees.AssignmentRestElementTree;
import com.google.javascript.jscomp.parsing.parser.trees.AwaitExpressionTree;
import com.google.javascript.jscomp.parsing.parser.trees.BinaryOperatorTree;
import com.google.javascript.jscomp.parsing.parser.trees.BlockTree;
import com.google.javascript.jscomp.parsing.parser.trees.BreakStatementTree;
import com.google.javascript.jscomp.parsing.parser.trees.CallExpressionTree;
import com.google.javascript.jscomp.parsing.parser.trees.CallSignatureTree;
import com.google.javascript.jscomp.parsing.parser.trees.CaseClauseTree;
import com.google.javascript.jscomp.parsing.parser.trees.CatchTree;
import com.google.javascript.jscomp.parsing.parser.trees.ClassDeclarationTree;
import com.google.javascript.jscomp.parsing.parser.trees.CommaExpressionTree;
import com.google.javascript.jscomp.parsing.parser.trees.Comment;
import com.google.javascript.jscomp.parsing.parser.trees.ComprehensionForTree;
import com.google.javascript.jscomp.parsing.parser.trees.ComprehensionIfTree;
import com.google.javascript.jscomp.parsing.parser.trees.ComprehensionTree;
import com.google.javascript.jscomp.parsing.parser.trees.ComputedPropertyDefinitionTree;
import com.google.javascript.jscomp.parsing.parser.trees.ComputedPropertyGetterTree;
import com.google.javascript.jscomp.parsing.parser.trees.ComputedPropertyMemberVariableTree;
import com.google.javascript.jscomp.parsing.parser.trees.ComputedPropertyMethodTree;
import com.google.javascript.jscomp.parsing.parser.trees.ComputedPropertySetterTree;
import com.google.javascript.jscomp.parsing.parser.trees.ConditionalExpressionTree;
import com.google.javascript.jscomp.parsing.parser.trees.ContinueStatementTree;
import com.google.javascript.jscomp.parsing.parser.trees.DebuggerStatementTree;
import com.google.javascript.jscomp.parsing.parser.trees.DefaultClauseTree;
import com.google.javascript.jscomp.parsing.parser.trees.DefaultParameterTree;
import com.google.javascript.jscomp.parsing.parser.trees.DoWhileStatementTree;
import com.google.javascript.jscomp.parsing.parser.trees.EmptyStatementTree;
import com.google.javascript.jscomp.parsing.parser.trees.EnumDeclarationTree;
import com.google.javascript.jscomp.parsing.parser.trees.ExportDeclarationTree;
import com.google.javascript.jscomp.parsing.parser.trees.ExportSpecifierTree;
import com.google.javascript.jscomp.parsing.parser.trees.ExpressionStatementTree;
import com.google.javascript.jscomp.parsing.parser.trees.FinallyTree;
import com.google.javascript.jscomp.parsing.parser.trees.ForInStatementTree;
import com.google.javascript.jscomp.parsing.parser.trees.ForOfStatementTree;
import com.google.javascript.jscomp.parsing.parser.trees.ForStatementTree;
import com.google.javascript.jscomp.parsing.parser.trees.FormalParameterListTree;
import com.google.javascript.jscomp.parsing.parser.trees.FunctionDeclarationTree;
import com.google.javascript.jscomp.parsing.parser.trees.FunctionTypeTree;
import com.google.javascript.jscomp.parsing.parser.trees.GenericTypeListTree;
import com.google.javascript.jscomp.parsing.parser.trees.GetAccessorTree;
import com.google.javascript.jscomp.parsing.parser.trees.IdentifierExpressionTree;
import com.google.javascript.jscomp.parsing.parser.trees.IfStatementTree;
import com.google.javascript.jscomp.parsing.parser.trees.ImportDeclarationTree;
import com.google.javascript.jscomp.parsing.parser.trees.ImportSpecifierTree;
import com.google.javascript.jscomp.parsing.parser.trees.IndexSignatureTree;
import com.google.javascript.jscomp.parsing.parser.trees.InterfaceDeclarationTree;
import com.google.javascript.jscomp.parsing.parser.trees.LabelledStatementTree;
import com.google.javascript.jscomp.parsing.parser.trees.LiteralExpressionTree;
import com.google.javascript.jscomp.parsing.parser.trees.MemberExpressionTree;
import com.google.javascript.jscomp.parsing.parser.trees.MemberLookupExpressionTree;
import com.google.javascript.jscomp.parsing.parser.trees.MemberVariableTree;
import com.google.javascript.jscomp.parsing.parser.trees.MissingPrimaryExpressionTree;
import com.google.javascript.jscomp.parsing.parser.trees.NamespaceDeclarationTree;
import com.google.javascript.jscomp.parsing.parser.trees.NamespaceNameTree;
import com.google.javascript.jscomp.parsing.parser.trees.NewExpressionTree;
import com.google.javascript.jscomp.parsing.parser.trees.NewTargetExpressionTree;
import com.google.javascript.jscomp.parsing.parser.trees.NullTree;
import com.google.javascript.jscomp.parsing.parser.trees.ObjectLiteralExpressionTree;
import com.google.javascript.jscomp.parsing.parser.trees.ObjectPatternTree;
import com.google.javascript.jscomp.parsing.parser.trees.OptionalParameterTree;
import com.google.javascript.jscomp.parsing.parser.trees.ParameterizedTypeTree;
import com.google.javascript.jscomp.parsing.parser.trees.ParenExpressionTree;
import com.google.javascript.jscomp.parsing.parser.trees.ParseTree;
import com.google.javascript.jscomp.parsing.parser.trees.ParseTreeType;
import com.google.javascript.jscomp.parsing.parser.trees.ProgramTree;
import com.google.javascript.jscomp.parsing.parser.trees.PropertyNameAssignmentTree;
import com.google.javascript.jscomp.parsing.parser.trees.RecordTypeTree;
import com.google.javascript.jscomp.parsing.parser.trees.RestParameterTree;
import com.google.javascript.jscomp.parsing.parser.trees.ReturnStatementTree;
import com.google.javascript.jscomp.parsing.parser.trees.SetAccessorTree;
import com.google.javascript.jscomp.parsing.parser.trees.SpreadExpressionTree;
import com.google.javascript.jscomp.parsing.parser.trees.SuperExpressionTree;
import com.google.javascript.jscomp.parsing.parser.trees.SwitchStatementTree;
import com.google.javascript.jscomp.parsing.parser.trees.TemplateLiteralExpressionTree;
import com.google.javascript.jscomp.parsing.parser.trees.TemplateLiteralPortionTree;
import com.google.javascript.jscomp.parsing.parser.trees.TemplateSubstitutionTree;
import com.google.javascript.jscomp.parsing.parser.trees.ThisExpressionTree;
import com.google.javascript.jscomp.parsing.parser.trees.ThrowStatementTree;
import com.google.javascript.jscomp.parsing.parser.trees.TryStatementTree;
import com.google.javascript.jscomp.parsing.parser.trees.TypeAliasTree;
import com.google.javascript.jscomp.parsing.parser.trees.TypeNameTree;
import com.google.javascript.jscomp.parsing.parser.trees.TypeQueryTree;
import com.google.javascript.jscomp.parsing.parser.trees.TypedParameterTree;
import com.google.javascript.jscomp.parsing.parser.trees.UnaryExpressionTree;
import com.google.javascript.jscomp.parsing.parser.trees.UnionTypeTree;
import com.google.javascript.jscomp.parsing.parser.trees.UpdateExpressionTree;
import com.google.javascript.jscomp.parsing.parser.trees.UpdateExpressionTree.OperatorPosition;
import com.google.javascript.jscomp.parsing.parser.trees.VariableDeclarationListTree;
import com.google.javascript.jscomp.parsing.parser.trees.VariableDeclarationTree;
import com.google.javascript.jscomp.parsing.parser.trees.VariableStatementTree;
import com.google.javascript.jscomp.parsing.parser.trees.WhileStatementTree;
import com.google.javascript.jscomp.parsing.parser.trees.WithStatementTree;
import com.google.javascript.jscomp.parsing.parser.trees.YieldExpressionTree;
import com.google.javascript.jscomp.parsing.parser.util.SourcePosition;
import com.google.javascript.jscomp.parsing.parser.util.SourceRange;
import com.google.javascript.jscomp.parsing.parser.util.format.SimpleFormat;
import com.google.javascript.rhino.ErrorReporter;
import com.google.javascript.rhino.IR;
import com.google.javascript.rhino.JSDocInfo;
import com.google.javascript.rhino.JSDocInfo.Visibility;
import com.google.javascript.rhino.JSDocInfoBuilder;
import com.google.javascript.rhino.Node;
import com.google.javascript.rhino.Node.TypeDeclarationNode;
import com.google.javascript.rhino.StaticSourceFile;
import com.google.javascript.rhino.Token;
import com.google.javascript.rhino.TokenStream;
import com.google.javascript.rhino.dtoa.DToA;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.regex.Pattern;
import javax.annotation.Nullable;
/**
* IRFactory transforms the external AST to the internal AST.
*/
class IRFactory {
static final String GETTER_ERROR_MESSAGE =
"getters are not supported in older versions of JavaScript. " +
"If you are targeting newer versions of JavaScript, " +
"set the appropriate language_in option.";
static final String SETTER_ERROR_MESSAGE =
"setters are not supported in older versions of JavaScript. " +
"If you are targeting newer versions of JavaScript, " +
"set the appropriate language_in option.";
static final String SUSPICIOUS_COMMENT_WARNING =
"Non-JSDoc comment has annotations. " +
"Did you mean to start it with '/**'?";
static final String INVALID_ES3_PROP_NAME =
"Keywords and reserved words are not allowed as unquoted property " +
"names in older versions of JavaScript. " +
"If you are targeting newer versions of JavaScript, " +
"set the appropriate language_in option.";
static final String INVALID_ES5_STRICT_OCTAL =
"Octal integer literals are not supported in strict mode.";
static final String INVALID_OCTAL_DIGIT =
"Invalid octal digit in octal literal.";
static final String STRING_CONTINUATION_WARNING =
"String continuations are not recommended. See"
+ " https://google.github.io/styleguide/javascriptguide.xml?showone=Multiline_string_literals#Multiline_string_literals";
static final String OCTAL_STRING_LITERAL_WARNING =
"Octal literals in strings are not supported in this language mode.";
static final String DUPLICATE_PARAMETER =
"Duplicate parameter name \"%s\"";
static final String DUPLICATE_LABEL =
"Duplicate label \"%s\"";
static final String UNLABELED_BREAK =
"unlabelled break must be inside loop or switch";
static final String UNEXPECTED_CONTINUE = "continue must be inside loop";
static final String UNEXPECTED_LABELLED_CONTINUE =
"continue can only use labeles of iteration statements";
static final String UNEXPECTED_RETURN = "return must be inside function";
static final String UNEXPECTED_NEW_DOT_TARGET = "new.target must be inside a function";
static final String UNDEFINED_LABEL = "undefined label \"%s\"";
private final String sourceString;
private final List newlines;
private final StaticSourceFile sourceFile;
private final String sourceName;
private final Config config;
private final ErrorReporter errorReporter;
private final TransformDispatcher transformDispatcher;
private static final ImmutableSet USE_STRICT_ONLY = ImmutableSet.of("use strict");
private static final ImmutableSet ALLOWED_DIRECTIVES =
USE_STRICT_ONLY;
private static final ImmutableSet ES5_RESERVED_KEYWORDS =
ImmutableSet.of(
// From Section 7.6.1.2
"class", "const", "enum", "export", "extends", "import", "super");
private static final ImmutableSet ES5_STRICT_RESERVED_KEYWORDS =
ImmutableSet.of(
// From Section 7.6.1.2
"class", "const", "enum", "export", "extends", "import", "super",
"implements", "interface", "let", "package", "private", "protected",
"public", "static", "yield");
private static final Pattern COMMENT_PATTERN =
Pattern.compile("(/|(\n[ \t]*))\\*[ \t]*@[a-zA-Z]+[ \t\n{]");
/**
* If non-null, use this set of keywords instead of TokenStream.isKeyword().
*/
@Nullable
private final Set reservedKeywords;
private final Set parsedComments = new HashSet<>();
// @license text gets appended onto the fileLevelJsDocBuilder as found,
// and stored in JSDocInfo for placeholder node.
JSDocInfoBuilder fileLevelJsDocBuilder;
JSDocInfo fileOverviewInfo = null;
// Use a template node for properties set on all nodes to minimize the
// memory footprint associated with these.
private final Node templateNode;
private final UnmodifiableIterator nextCommentIter;
private Comment currentComment;
private boolean currentFileIsExterns = false;
private boolean hasJsDocTypeAnnotations = false;
private FeatureSet features = FeatureSet.BARE_MINIMUM;
private Node resultNode;
private IRFactory(String sourceString,
StaticSourceFile sourceFile,
Config config,
ErrorReporter errorReporter,
ImmutableList comments) {
this.sourceString = sourceString;
this.nextCommentIter = comments.iterator();
this.currentComment = skipNonJsDoc(nextCommentIter);
this.newlines = new ArrayList<>();
this.sourceFile = sourceFile;
// The template node properties are applied to all nodes in this transform.
this.templateNode = createTemplateNode();
this.fileLevelJsDocBuilder =
new JSDocInfoBuilder(config.jsDocParsingMode().shouldParseDescriptions());
// Pre-generate all the newlines in the file.
for (int charNo = 0; true; charNo++) {
charNo = sourceString.indexOf('\n', charNo);
if (charNo == -1) {
break;
}
newlines.add(charNo);
}
// Sometimes this will be null in tests.
this.sourceName = sourceFile == null ? null : sourceFile.getName();
this.config = config;
this.errorReporter = errorReporter;
this.transformDispatcher = new TransformDispatcher();
if (config.strictMode().isStrict()) {
reservedKeywords = ES5_STRICT_RESERVED_KEYWORDS;
} else if (config.languageMode() == LanguageMode.ECMASCRIPT3) {
reservedKeywords = null; // use TokenStream.isKeyword instead
} else {
reservedKeywords = ES5_RESERVED_KEYWORDS;
}
}
private static Comment skipNonJsDoc(UnmodifiableIterator comments) {
while (comments.hasNext()) {
Comment comment = comments.next();
if (comment.type == Comment.Type.JSDOC) {
return comment;
}
}
return null;
}
// Create a template node to use as a source of common attributes, this allows
// the prop structure to be shared among all the node from this source file.
// This reduces the cost of these properties to O(nodes) to O(files).
private Node createTemplateNode() {
// The Node type choice is arbitrary.
Node templateNode = new Node(Token.SCRIPT);
templateNode.setStaticSourceFile(sourceFile);
return templateNode;
}
public static IRFactory transformTree(ProgramTree tree,
StaticSourceFile sourceFile,
String sourceString,
Config config,
ErrorReporter errorReporter) {
IRFactory irFactory = new IRFactory(sourceString, sourceFile,
config, errorReporter, tree.sourceComments);
// don't call transform as we don't want standard jsdoc handling.
Node n = irFactory.transformDispatcher.process(tree);
irFactory.setSourceInfo(n, tree);
if (tree.sourceComments != null) {
for (Comment comment : tree.sourceComments) {
if ((comment.type == Comment.Type.JSDOC || comment.type == Comment.Type.IMPORTANT)
&& !irFactory.parsedComments.contains(comment)) {
irFactory.handlePossibleFileOverviewJsDoc(comment);
} else if (comment.type == Comment.Type.BLOCK) {
irFactory.handleBlockComment(comment);
}
}
}
irFactory.setFileOverviewJsDoc(n);
irFactory.validateAll(n);
irFactory.resultNode = n;
return irFactory;
}
static FeatureSet detectFeatures(
ProgramTree tree, StaticSourceFile sourceFile, String sourceString) {
IRFactory irFactory =
new IRFactory(sourceString, sourceFile, NULL_CONFIG, NULL_REPORTER, tree.sourceComments);
Node n = irFactory.transformDispatcher.process(tree);
irFactory.validateAll(n);
return irFactory.features;
}
static final Config NULL_CONFIG = Config.builder().build();
static final ErrorReporter NULL_REPORTER = new ErrorReporter() {
@Override
public void warning(String message, String sourceName, int line, int lineOffset) {}
@Override
public void error(String message, String sourceName, int line, int lineOffset) {}
};
Node getResultNode() {
return resultNode;
}
FeatureSet getFeatures() {
return features;
}
private void validateAll(Node n) {
ArrayDeque work = new ArrayDeque<>();
while (n != null) {
validate(n);
Node nextSibling = n.getNext();
Node firstChild = n.getFirstChild();
if (firstChild != null) {
if (nextSibling != null) {
// handle the siblings later
work.push(nextSibling);
}
n = firstChild;
} else if (nextSibling != null) {
// no children, handle the next sibling
n = nextSibling;
} else {
// no siblings, continue with work we have saved on the work queue
n = work.poll();
}
}
checkState(work.isEmpty());
}
private void validate(Node n) {
validateParameters(n);
validateBreakContinue(n);
validateReturn(n);
validateNewDotTarget(n);
validateLabel(n);
validateBlockScopedFunctions(n);
}
private void validateReturn(Node n) {
if (n.isReturn()) {
Node parent = n;
while ((parent = parent.getParent()) != null) {
if (parent.isFunction()) {
return;
}
}
errorReporter.error(UNEXPECTED_RETURN,
sourceName, n.getLineno(), n.getCharno());
}
}
private void validateNewDotTarget(Node n) {
if (n.getToken() == Token.NEW_TARGET) {
Node parent = n;
while ((parent = parent.getParent()) != null) {
if (parent.isFunction()) {
return;
}
}
errorReporter.error(UNEXPECTED_NEW_DOT_TARGET, sourceName, n.getLineno(), n.getCharno());
}
}
private void validateBreakContinue(Node n) {
if (n.isBreak() || n.isContinue()) {
Node labelName = n.getFirstChild();
if (labelName != null) {
Node parent = n.getParent();
while (!parent.isLabel() || !labelsMatch(parent, labelName)) {
if (parent.isFunction() || parent.isScript()) {
// report missing label
errorReporter.error(
SimpleFormat.format(UNDEFINED_LABEL, labelName.getString()),
sourceName,
n.getLineno(), n.getCharno());
break;
}
parent = parent.getParent();
}
if (parent.isLabel() && labelsMatch(parent, labelName)) {
if (n.isContinue() && !isContinueTarget(parent.getLastChild())) {
// report invalid continue target
errorReporter.error(
UNEXPECTED_LABELLED_CONTINUE,
sourceName,
n.getLineno(), n.getCharno());
}
}
} else {
if (n.isContinue()) {
Node parent = n.getParent();
while (!isContinueTarget(parent)) {
if (parent.isFunction() || parent.isScript()) {
// report invalid continue
errorReporter.error(
UNEXPECTED_CONTINUE,
sourceName,
n.getLineno(), n.getCharno());
break;
}
parent = parent.getParent();
}
} else {
Node parent = n.getParent();
while (!isBreakTarget(parent)) {
if (parent.isFunction() || parent.isScript()) {
// report invalid break
errorReporter.error(
UNLABELED_BREAK,
sourceName,
n.getLineno(), n.getCharno());
break;
}
parent = parent.getParent();
}
}
}
}
}
private static boolean isBreakTarget(Node n) {
switch (n.getToken()) {
case FOR:
case FOR_IN:
case FOR_OF:
case WHILE:
case DO:
case SWITCH:
return true;
default:
return false;
}
}
private static boolean isContinueTarget(Node n) {
switch (n.getToken()) {
case FOR:
case FOR_IN:
case FOR_OF:
case WHILE:
case DO:
return true;
default:
return false;
}
}
private static boolean labelsMatch(Node label, Node labelName) {
return label.getFirstChild().getString().equals(labelName.getString());
}
private void validateLabel(Node n) {
if (n.isLabel()) {
Node labelName = n.getFirstChild();
for (Node parent = n.getParent();
parent != null && !parent.isFunction(); parent = parent.getParent()) {
if (parent.isLabel() && labelsMatch(parent, labelName)) {
errorReporter.error(
SimpleFormat.format(DUPLICATE_LABEL, labelName.getString()),
sourceName,
n.getLineno(), n.getCharno());
break;
}
}
}
}
private void validateParameters(Node n) {
if (n.isParamList()) {
Node c = n.getFirstChild();
for (; c != null; c = c.getNext()) {
if (!c.isName()) {
continue;
}
Node sibling = c.getNext();
for (; sibling != null; sibling = sibling.getNext()) {
if (sibling.isName() && c.getString().equals(sibling.getString())) {
errorReporter.warning(
SimpleFormat.format(DUPLICATE_PARAMETER, c.getString()),
sourceName,
n.getLineno(), n.getCharno());
}
}
}
}
}
private void validateBlockScopedFunctions(Node n) {
if (n.isFunction() && n.getParent().isNormalBlock() && !n.getGrandparent().isFunction()) {
maybeWarnForFeature(n, Feature.BLOCK_SCOPED_FUNCTION_DECLARATION);
}
}
JSDocInfo recordJsDoc(SourceRange location, JSDocInfo info) {
if (info != null && info.hasTypeInformation()) {
hasJsDocTypeAnnotations = true;
if (features.version().equals("ts")) {
errorReporter.error("Can only have JSDoc or inline type annotations, not both",
sourceName, lineno(location.start), charno(location.start));
}
}
return info;
}
void recordTypeSyntax(SourceRange location) {
if (hasJsDocTypeAnnotations) {
errorReporter.error("Can only have JSDoc or inline type annotations, not both",
sourceName, lineno(location.start), charno(location.start));
}
}
private void setFileOverviewJsDoc(Node irNode) {
// Only after we've seen all @fileoverview entries, attach the
// last one to the root node, and copy the found license strings
// to that node.
JSDocInfo rootNodeJsDoc = fileLevelJsDocBuilder.build();
if (rootNodeJsDoc != null) {
irNode.setJSDocInfo(rootNodeJsDoc);
}
if (fileOverviewInfo != null) {
if ((irNode.getJSDocInfo() != null) &&
(irNode.getJSDocInfo().getLicense() != null)) {
JSDocInfoBuilder builder = JSDocInfoBuilder.copyFrom(fileOverviewInfo);
builder.recordLicense(irNode.getJSDocInfo().getLicense());
fileOverviewInfo = builder.build();
}
irNode.setJSDocInfo(fileOverviewInfo);
}
}
Node transformBlock(ParseTree node) {
Node irNode = transform(node);
if (!irNode.isNormalBlock()) {
if (irNode.isEmpty()) {
irNode.setToken(Token.BLOCK);
} else {
Node newBlock = newNode(Token.BLOCK, irNode);
setSourceInfo(newBlock, irNode);
irNode = newBlock;
}
irNode.setIsAddedBlock(true);
}
return irNode;
}
/**
* Check to see if the given block comment looks like it should be JSDoc.
*/
private void handleBlockComment(Comment comment) {
if (COMMENT_PATTERN.matcher(comment.value).find()) {
errorReporter.warning(
SUSPICIOUS_COMMENT_WARNING,
sourceName,
lineno(comment.location.start),
charno(comment.location.start));
}
}
/**
* @return true if the jsDocParser represents a fileoverview.
*/
private boolean handlePossibleFileOverviewJsDoc(
JsDocInfoParser jsDocParser) {
if (jsDocParser.getFileOverviewJSDocInfo() != fileOverviewInfo) {
fileOverviewInfo = jsDocParser.getFileOverviewJSDocInfo();
if (fileOverviewInfo.isExterns()) {
this.currentFileIsExterns = true;
}
return true;
}
return false;
}
private void handlePossibleFileOverviewJsDoc(Comment comment) {
JsDocInfoParser jsDocParser = createJsDocInfoParser(comment);
parsedComments.add(comment);
handlePossibleFileOverviewJsDoc(jsDocParser);
}
private Comment getJsDoc(SourceRange location) {
Comment closestPreviousComment = null;
while (hasPendingCommentBefore(location)) {
closestPreviousComment = currentComment;
currentComment = skipNonJsDoc(nextCommentIter);
}
return closestPreviousComment;
}
private Comment getJsDoc(ParseTree tree) {
return getJsDoc(tree.location);
}
private Comment getJsDoc(
com.google.javascript.jscomp.parsing.parser.Token token) {
return getJsDoc(token.location);
}
private boolean hasPendingCommentBefore(SourceRange location) {
return currentComment != null
&& currentComment.location.end.offset <= location.start.offset;
}
private boolean hasPendingCommentBefore(ParseTree tree) {
return hasPendingCommentBefore(tree.location);
}
private JSDocInfo handleJsDoc(Comment comment) {
if (comment != null) {
JsDocInfoParser jsDocParser = createJsDocInfoParser(comment);
parsedComments.add(comment);
if (!handlePossibleFileOverviewJsDoc(jsDocParser)) {
return recordJsDoc(comment.location,
jsDocParser.retrieveAndResetParsedJSDocInfo());
}
}
return null;
}
private JSDocInfo handleJsDoc(ParseTree node) {
if (!shouldAttachJSDocHere(node)) {
return null;
}
return handleJsDoc(getJsDoc(node));
}
JSDocInfo handleJsDoc(com.google.javascript.jscomp.parsing.parser.Token token) {
return handleJsDoc(getJsDoc(token));
}
private boolean shouldAttachJSDocHere(ParseTree tree) {
switch (tree.type) {
case EXPRESSION_STATEMENT:
case LABELLED_STATEMENT:
case EXPORT_DECLARATION:
return false;
case CALL_EXPRESSION:
case CONDITIONAL_EXPRESSION:
case BINARY_OPERATOR:
case MEMBER_EXPRESSION:
case MEMBER_LOOKUP_EXPRESSION:
case UPDATE_EXPRESSION:
ParseTree nearest = findNearestNode(tree);
if (nearest.type == ParseTreeType.PAREN_EXPRESSION) {
return false;
}
return true;
default:
return true;
}
}
private static ParseTree findNearestNode(ParseTree tree) {
while (true) {
switch (tree.type) {
case EXPRESSION_STATEMENT:
tree = tree.asExpressionStatement().expression;
continue;
case CALL_EXPRESSION:
tree = tree.asCallExpression().operand;
continue;
case BINARY_OPERATOR:
tree = tree.asBinaryOperator().left;
continue;
case CONDITIONAL_EXPRESSION:
tree = tree.asConditionalExpression().condition;
continue;
case MEMBER_EXPRESSION:
tree = tree.asMemberExpression().operand;
continue;
case MEMBER_LOOKUP_EXPRESSION:
tree = tree.asMemberLookupExpression().operand;
continue;
case UPDATE_EXPRESSION:
tree = tree.asUpdateExpression().operand;
continue;
default:
return tree;
}
}
}
Node transform(ParseTree tree) {
JSDocInfo info = handleJsDoc(tree);
Node node = transformDispatcher.process(tree);
if (info != null) {
node = maybeInjectCastNode(tree, info, node);
node.setJSDocInfo(info);
}
setSourceInfo(node, tree);
return node;
}
private Node maybeInjectCastNode(ParseTree node, JSDocInfo info, Node irNode) {
if (node.type == ParseTreeType.PAREN_EXPRESSION && info.hasType()) {
irNode = newNode(Token.CAST, irNode);
}
return irNode;
}
/**
* Names and destructuring patterns, in parameters or variable declarations are special,
* because they can have inline type docs attached.
*
* function f(/** string */ x) {} annotates 'x' as a string.
*
* @see
* Using Inline Doc Comments
*/
Node transformNodeWithInlineJsDoc(ParseTree node) {
JSDocInfo info = handleInlineJsDoc(node);
Node irNode = transformDispatcher.process(node);
if (info != null) {
irNode.setJSDocInfo(info);
}
setSourceInfo(irNode, node);
return irNode;
}
JSDocInfo handleInlineJsDoc(ParseTree node) {
return handleInlineJsDoc(node.location);
}
JSDocInfo handleInlineJsDoc(
com.google.javascript.jscomp.parsing.parser.Token token) {
return handleInlineJsDoc(token.location);
}
JSDocInfo handleInlineJsDoc(SourceRange location) {
Comment comment = getJsDoc(location);
if (comment != null && !comment.value.contains("@")) {
return recordJsDoc(location, parseInlineTypeDoc(comment));
} else {
return handleJsDoc(comment);
}
}
Node transformNumberAsString(LiteralToken token) {
double value = normalizeNumber(token);
Node irNode = newStringNode(DToA.numberToString(value));
JSDocInfo jsDocInfo = handleJsDoc(token);
if (jsDocInfo != null) {
irNode.setJSDocInfo(jsDocInfo);
}
setSourceInfo(irNode, token);
return irNode;
}
static int lineno(ParseTree node) {
return lineno(node.location.start);
}
static int lineno(com.google.javascript.jscomp.parsing.parser.Token token) {
return lineno(token.location.start);
}
static int lineno(SourcePosition location) {
// location lines start at zero, our AST starts at 1.
return location.line + 1;
}
static int charno(ParseTree node) {
return charno(node.location.start);
}
static int charno(com.google.javascript.jscomp.parsing.parser.Token token) {
return charno(token.location.start);
}
static int charno(SourcePosition location) {
return location.column;
}
void maybeWarnForFeature(ParseTree node, Feature feature) {
features = features.with(feature);
if (!isSupportedForInputLanguageMode(feature)) {
errorReporter.warning(
"this language feature is only supported for "
+ LanguageMode.minimumRequiredFor(feature)
+ " mode or better: "
+ feature,
sourceName,
lineno(node), charno(node));
}
}
void maybeWarnForFeature(
com.google.javascript.jscomp.parsing.parser.Token token, Feature feature) {
features = features.with(feature);
if (!isSupportedForInputLanguageMode(feature)) {
errorReporter.warning(
"this language feature is only supported for "
+ LanguageMode.minimumRequiredFor(feature)
+ " mode or better: "
+ feature,
sourceName,
lineno(token), charno(token));
}
}
void maybeWarnForFeature(Node node, Feature feature) {
features = features.with(feature);
if (!isSupportedForInputLanguageMode(feature)) {
errorReporter.warning(
"this language feature is only supported for "
+ LanguageMode.minimumRequiredFor(feature)
+ " mode or better: "
+ feature,
sourceName,
node.getLineno(), node.getCharno());
}
}
void setSourceInfo(Node node, Node ref) {
node.setLineno(ref.getLineno());
node.setCharno(ref.getCharno());
setLengthFrom(node, ref);
}
void setSourceInfo(Node irNode, ParseTree node) {
if (irNode.getLineno() == -1) {
setSourceInfo(irNode, node.location.start, node.location.end);
}
}
void setSourceInfo(
Node irNode, com.google.javascript.jscomp.parsing.parser.Token token) {
setSourceInfo(irNode, token.location.start, token.location.end);
}
void setSourceInfo(
Node node, SourcePosition start, SourcePosition end) {
if (node.getLineno() == -1) {
// If we didn't already set the line, then set it now. This avoids
// cases like ParenthesizedExpression where we just return a previous
// node, but don't want the new node to get its parent's line number.
int lineno = lineno(start);
node.setLineno(lineno);
int charno = charno(start);
node.setCharno(charno);
setLength(node, start, end);
}
}
/**
* Creates a JsDocInfoParser and parses the JsDoc string.
*
* Used both for handling individual JSDoc comments and for handling
* file-level JSDoc comments (@fileoverview and @license).
*
* @param node The JsDoc Comment node to parse.
* @return A JsDocInfoParser. Will contain either fileoverview JsDoc, or
* normal JsDoc, or no JsDoc (if the method parses to the wrong level).
*/
private JsDocInfoParser createJsDocInfoParser(Comment node) {
String comment = node.value;
int lineno = lineno(node.location.start);
int charno = charno(node.location.start);
int position = node.location.start.offset;
// The JsDocInfoParser expects the comment without the initial '/**'.
int numOpeningChars = 3;
JsDocInfoParser jsdocParser =
new JsDocInfoParser(
new JsDocTokenStream(comment.substring(numOpeningChars),
lineno,
charno + numOpeningChars),
comment,
position,
templateNode,
config,
errorReporter);
jsdocParser.setFileLevelJsDocBuilder(fileLevelJsDocBuilder);
jsdocParser.setFileOverviewJSDocInfo(fileOverviewInfo);
if (node.type == Comment.Type.IMPORTANT && node.value.length() > 0) {
jsdocParser.parseImportantComment();
} else {
jsdocParser.parse();
}
return jsdocParser;
}
/**
* Parses inline type info.
*/
private JSDocInfo parseInlineTypeDoc(Comment node) {
String comment = node.value;
int lineno = lineno(node.location.start);
int charno = charno(node.location.start);
// The JsDocInfoParser expects the comment without the initial '/**'.
int numOpeningChars = 3;
JsDocInfoParser parser =
new JsDocInfoParser(
new JsDocTokenStream(comment.substring(numOpeningChars),
lineno,
charno + numOpeningChars),
comment,
node.location.start.offset,
templateNode,
config,
errorReporter);
return parser.parseInlineTypeDoc();
}
// Set the length on the node if we're in IDE mode.
void setLength(
Node node, SourcePosition start, SourcePosition end) {
node.setLength(end.offset - start.offset);
}
void setLengthFrom(Node node, Node ref) {
node.setLength(ref.getLength());
}
private class TransformDispatcher {
/**
* Transforms the given node and then sets its type to Token.STRING if it
* was Token.NAME. If its type was already Token.STRING, then quotes it.
* Used for properties, as the old AST uses String tokens, while the new one
* uses Name tokens for unquoted strings. For example, in
* var o = {'a' : 1, b: 2};
* the string 'a' is quoted, while the name b is turned into a string, but
* unquoted.
*/
private Node processObjectLitKeyAsString(
com.google.javascript.jscomp.parsing.parser.Token token) {
Node ret;
if (token == null) {
return createMissingExpressionNode();
} else if (token.type == TokenType.IDENTIFIER) {
ret = processName(token.asIdentifier(), true);
} else if (token.type == TokenType.NUMBER) {
ret = transformNumberAsString(token.asLiteral());
ret.putBooleanProp(Node.QUOTED_PROP, true);
} else {
ret = processString(token.asLiteral());
ret.putBooleanProp(Node.QUOTED_PROP, true);
}
checkState(ret.isString());
return ret;
}
Node processComprehension(ComprehensionTree tree) {
return unsupportedLanguageFeature(tree, "array/generator comprehensions");
}
Node processComprehensionFor(ComprehensionForTree tree) {
return unsupportedLanguageFeature(tree, "array/generator comprehensions");
}
Node processComprehensionIf(ComprehensionIfTree tree) {
return unsupportedLanguageFeature(tree, "array/generator comprehensions");
}
Node processArrayLiteral(ArrayLiteralExpressionTree tree) {
Node node = newNode(Token.ARRAYLIT);
for (ParseTree child : tree.elements) {
Node c = transform(child);
node.addChildToBack(c);
}
return node;
}
Node processArrayPattern(ArrayPatternTree tree) {
maybeWarnForFeature(tree, Feature.DESTRUCTURING);
Node node = newNode(Token.ARRAY_PATTERN);
for (ParseTree child : tree.elements) {
node.addChildToBack(transformNodeWithInlineJsDoc(child));
}
return node;
}
Node processObjectPattern(ObjectPatternTree tree) {
maybeWarnForFeature(tree, Feature.DESTRUCTURING);
Node node = newNode(Token.OBJECT_PATTERN);
for (ParseTree child : tree.fields) {
Node childNode = transformNodeWithInlineJsDoc(child);
if (childNode.isDefaultValue()) {
// Children of the form {a = b} are parsed as DEFAULT_VALUE{NAME, initializer}.
// In this case, insert an extra STRING_KEY node.
Node name = childNode.getFirstChild();
Node stringKey = newStringNode(Token.STRING_KEY, name.getString());
setSourceInfo(stringKey, name);
stringKey.setShorthandProperty(true);
stringKey.addChildToBack(childNode);
childNode = stringKey;
} else if (childNode.isRest()) {
maybeWarnForFeature(child, Feature.OBJECT_PATTERN_REST);
}
node.addChildToBack(childNode);
}
return node;
}
Node processAssignmentRestElement(AssignmentRestElementTree tree) {
maybeWarnForFeature(tree, Feature.ARRAY_PATTERN_REST);
return newNode(Token.REST, transformNodeWithInlineJsDoc(tree.assignmentTarget));
}
Node processAstRoot(ProgramTree rootNode) {
Node scriptNode = newNode(Token.SCRIPT);
for (ParseTree child : rootNode.sourceElements) {
scriptNode.addChildToBack(transform(child));
}
parseDirectives(scriptNode);
boolean isGoogModule = isGoogModuleFile(scriptNode);
if (isGoogModule || features.has(Feature.MODULES)) {
Node moduleNode = newNode(Token.MODULE_BODY);
setSourceInfo(moduleNode, rootNode);
moduleNode.addChildrenToBack(scriptNode.removeChildren());
scriptNode.addChildToBack(moduleNode);
if (isGoogModule) {
scriptNode.putBooleanProp(Node.GOOG_MODULE, true);
}
}
return scriptNode;
}
private boolean isGoogModuleFile(Node scriptNode) {
checkArgument(scriptNode.isScript());
if (!scriptNode.hasChildren()) {
return false;
}
Node exprResult = scriptNode.getFirstChild();
if (!exprResult.isExprResult()) {
return false;
}
Node call = exprResult.getFirstChild();
if (!call.isCall()) {
return false;
}
return call.getFirstChild().matchesQualifiedName("goog.module");
}
/**
* Parse the directives, encode them in the AST, and remove their nodes.
*
* For information on ES5 directives, see section 14.1 of
* ECMA-262, Edition 5.
*
* It would be nice if Rhino would eventually take care of this for
* us, but right now their directive-processing is a one-off.
*/
private void parseDirectives(Node node) {
// Remove all the directives, and encode them in the AST.
ImmutableSet.Builder directives = null;
while (isDirective(node.getFirstChild())) {
String directive = node.removeFirstChild().getFirstChild().getString();
if (directives == null) {
directives = new ImmutableSet.Builder<>();
}
directives.add(directive);
}
if (directives != null) {
ImmutableSet result = directives.build();
if (result.size() == 1 && result.contains("use strict")) {
// Use a shared set.
result = USE_STRICT_ONLY;
}
node.setDirectives(result);
}
}
private boolean isDirective(Node n) {
if (n == null) {
return false;
}
Token nType = n.getToken();
return nType == Token.EXPR_RESULT &&
n.getFirstChild().isString() &&
ALLOWED_DIRECTIVES.contains(n.getFirstChild().getString());
}
Node processBlock(BlockTree blockNode) {
Node node = newNode(Token.BLOCK);
for (ParseTree child : blockNode.statements) {
node.addChildToBack(transform(child));
}
return node;
}
Node processBreakStatement(BreakStatementTree statementNode) {
Node node = newNode(Token.BREAK);
if (statementNode.getLabel() != null) {
Node labelName = transformLabelName(statementNode.name);
node.addChildToBack(labelName);
}
return node;
}
Node transformLabelName(IdentifierToken token) {
Node label = newStringNode(Token.LABEL_NAME, token.value);
setSourceInfo(label, token);
return label;
}
Node processConditionalExpression(ConditionalExpressionTree exprNode) {
return newNode(
Token.HOOK,
transform(exprNode.condition),
transform(exprNode.left),
transform(exprNode.right));
}
Node processContinueStatement(ContinueStatementTree statementNode) {
Node node = newNode(Token.CONTINUE);
if (statementNode.getLabel() != null) {
Node labelName = transformLabelName(statementNode.name);
node.addChildToBack(labelName);
}
return node;
}
Node processDoLoop(DoWhileStatementTree loopNode) {
return newNode(
Token.DO,
transformBlock(loopNode.body),
transform(loopNode.condition));
}
Node processElementGet(MemberLookupExpressionTree getNode) {
return newNode(
Token.GETELEM,
transform(getNode.operand),
transform(getNode.memberExpression));
}
/**
* @param exprNode unused
*/
Node processEmptyStatement(EmptyStatementTree exprNode) {
return newNode(Token.EMPTY);
}
Node processExpressionStatement(ExpressionStatementTree statementNode) {
Node node = newNode(Token.EXPR_RESULT);
node.addChildToBack(transform(statementNode.expression));
return node;
}
Node processForInLoop(ForInStatementTree loopNode) {
Node initializer = transform(loopNode.initializer);
ImmutableSet invalidInitializers =
ImmutableSet.of(Token.ARRAYLIT, Token.OBJECTLIT);
if (invalidInitializers.contains(initializer.getToken())) {
errorReporter.error("Invalid LHS for a for-in loop", sourceName,
lineno(loopNode.initializer), charno(loopNode.initializer));
}
return newNode(
Token.FOR_IN, initializer, transform(loopNode.collection), transformBlock(loopNode.body));
}
Node processForOf(ForOfStatementTree loopNode) {
maybeWarnForFeature(loopNode, Feature.FOR_OF);
Node initializer = transform(loopNode.initializer);
ImmutableSet invalidInitializers =
ImmutableSet.of(Token.ARRAYLIT, Token.OBJECTLIT);
if (invalidInitializers.contains(initializer.getToken())) {
errorReporter.error("Invalid LHS for a for-of loop", sourceName,
lineno(loopNode.initializer), charno(loopNode.initializer));
}
return newNode(
Token.FOR_OF,
initializer,
transform(loopNode.collection),
transformBlock(loopNode.body));
}
Node processForLoop(ForStatementTree loopNode) {
Node node = newNode(
Token.FOR,
transformOrEmpty(loopNode.initializer, loopNode),
transformOrEmpty(loopNode.condition, loopNode),
transformOrEmpty(loopNode.increment, loopNode));
node.addChildToBack(transformBlock(loopNode.body));
return node;
}
Node transformOrEmpty(ParseTree tree, ParseTree parent) {
if (tree == null) {
Node n = newNode(Token.EMPTY);
setSourceInfo(n, parent);
return n;
}
return transform(tree);
}
Node transformOrEmpty(IdentifierToken token, ParseTree parent) {
if (token == null) {
Node n = newNode(Token.EMPTY);
setSourceInfo(n, parent);
return n;
}
return processName(token);
}
Node processFunctionCall(CallExpressionTree callNode) {
Node node = newNode(Token.CALL,
transform(callNode.operand));
for (ParseTree child : callNode.arguments.arguments) {
node.addChildToBack(transform(child));
}
return node;
}
Node processFunction(FunctionDeclarationTree functionTree) {
boolean isDeclaration = (functionTree.kind == FunctionDeclarationTree.Kind.DECLARATION);
boolean isMember = (functionTree.kind == FunctionDeclarationTree.Kind.MEMBER);
boolean isArrow = (functionTree.kind == FunctionDeclarationTree.Kind.ARROW);
boolean isAsync = functionTree.isAsync;
boolean isGenerator = functionTree.isGenerator;
boolean isSignature = (functionTree.functionBody.type == ParseTreeType.EMPTY_STATEMENT);
if (isGenerator) {
maybeWarnForFeature(functionTree, Feature.GENERATORS);
}
if (isMember) {
maybeWarnForFeature(functionTree, Feature.MEMBER_DECLARATIONS);
}
if (isArrow) {
maybeWarnForFeature(functionTree, Feature.ARROW_FUNCTIONS);
}
if (isAsync) {
maybeWarnForFeature(functionTree, Feature.ASYNC_FUNCTIONS);
}
IdentifierToken name = functionTree.name;
Node newName;
if (name != null) {
newName = processNameWithInlineJSDoc(name);
} else {
if (isDeclaration || isMember) {
errorReporter.error(
"unnamed function statement",
sourceName,
lineno(functionTree), charno(functionTree));
// Return the bare minimum to put the AST in a valid state.
newName = createMissingNameNode();
} else {
newName = newStringNode(Token.NAME, "");
}
// Old Rhino tagged the empty name node with the line number of the
// declaration.
setSourceInfo(newName, functionTree);
}
Node node = newNode(Token.FUNCTION);
if (isMember) {
newName.setString("");
}
node.addChildToBack(newName);
maybeProcessGenerics(node.getFirstChild(), functionTree.generics);
node.addChildToBack(transform(functionTree.formalParameterList));
maybeProcessType(node, functionTree.returnType);
Node bodyNode = transform(functionTree.functionBody);
if (!isArrow && !isSignature && !bodyNode.isNormalBlock()) {
// When in "keep going" mode the parser tries to parse some constructs the
// compiler doesn't support, repair it here.
checkState(config.runMode() == Config.RunMode.KEEP_GOING);
bodyNode = IR.block();
}
parseDirectives(bodyNode);
node.addChildToBack(bodyNode);
node.setIsGeneratorFunction(isGenerator);
node.setIsArrowFunction(isArrow);
node.setIsAsyncFunction(isAsync);
node.putBooleanProp(Node.OPT_ES6_TYPED, functionTree.isOptional);
Node result;
if (isMember) {
setSourceInfo(node, functionTree);
Node member = newStringNode(Token.MEMBER_FUNCTION_DEF, name.value);
member.addChildToBack(node);
member.setStaticMember(functionTree.isStatic);
maybeProcessAccessibilityModifier(functionTree, member, functionTree.access);
node.setDeclaredTypeExpression(node.getDeclaredTypeExpression());
result = member;
} else {
result = node;
}
return result;
}
Node processFormalParameterList(FormalParameterListTree tree) {
Node params = newNode(Token.PARAM_LIST);
if (checkParameters(tree.parameters)) {
for (ParseTree param : tree.parameters) {
Node paramNode = transformNodeWithInlineJsDoc(param);
// Children must be simple names, default parameters, rest
// parameters, or destructuring patterns.
checkState(
paramNode.isName()
|| paramNode.isRest()
|| paramNode.isArrayPattern()
|| paramNode.isObjectPattern()
|| paramNode.isDefaultValue());
params.addChildToBack(paramNode);
}
}
return params;
}
Node processDefaultParameter(DefaultParameterTree tree) {
maybeWarnForFeature(tree, Feature.DEFAULT_PARAMETERS);
return newNode(Token.DEFAULT_VALUE,
transform(tree.lhs), transform(tree.defaultValue));
}
Node processRestParameter(RestParameterTree tree) {
maybeWarnForFeature(tree, Feature.REST_PARAMETERS);
Node assignmentTarget = transformNodeWithInlineJsDoc(tree.assignmentTarget);
if (assignmentTarget.isDestructuringPattern()) {
maybeWarnForFeature(tree.assignmentTarget, Feature.DESTRUCTURING);
}
return newNode(Token.REST, assignmentTarget);
}
Node processSpreadExpression(SpreadExpressionTree tree) {
maybeWarnForFeature(tree, Feature.SPREAD_EXPRESSIONS);
return newNode(Token.SPREAD, transform(tree.expression));
}
Node processIfStatement(IfStatementTree statementNode) {
Node node = newNode(Token.IF);
node.addChildToBack(transform(statementNode.condition));
node.addChildToBack(transformBlock(statementNode.ifClause));
if (statementNode.elseClause != null) {
node.addChildToBack(transformBlock(statementNode.elseClause));
}
return node;
}
Node processBinaryExpression(BinaryOperatorTree exprNode) {
if (exprNode.operator.type == TokenType.STAR_STAR
|| exprNode.operator.type == TokenType.STAR_STAR_EQUAL) {
maybeWarnForFeature(exprNode, Feature.EXPONENT_OP);
}
if (hasPendingCommentBefore(exprNode.right)) {
return newNode(
transformBinaryTokenType(exprNode.operator.type),
transform(exprNode.left),
transform(exprNode.right));
} else {
// No JSDoc, we can traverse out of order.
return processBinaryExpressionHelper(exprNode);
}
}
// Deep binary ops (typical string concatentations) can cause stack overflows,
// avoid recursing in this case and loop instead.
private Node processBinaryExpressionHelper(BinaryOperatorTree exprTree) {
Node root = null;
Node current = null;
Node previous = null;
while (exprTree != null) {
previous = current;
// Skip the first child but recurse normally into the right operand as typically this isn't
// deep and because we have already checked that there isn't any JSDoc we can traverse
// out of order.
current = newNode(
transformBinaryTokenType(exprTree.operator.type),
transform(exprTree.right));
// We have inlined "transform" here. Normally, we would need to handle the JSDoc here but we
// know there is no JSDoc to attach, which simplifies things.
setSourceInfo(current, exprTree);
// As the iteration continues add the left operand.
if (previous != null) {
previous.addChildToFront(current);
}
if (exprTree.left instanceof BinaryOperatorTree) {
// continue with the left hand child
exprTree = (BinaryOperatorTree) exprTree.left;
} else {
// Finish things off, add the left operand to the current node.
Node leftNode = transform(exprTree.left);
current.addChildToFront(leftNode);
// Nothing left to do.
exprTree = null;
}
// Save the top binary op, this is the result to return.
if (root == null) {
root = current;
}
}
return root;
}
/**
* @param node unused.
*/
Node processDebuggerStatement(DebuggerStatementTree node) {
return newNode(Token.DEBUGGER);
}
/**
* @param node unused.
*/
Node processThisExpression(ThisExpressionTree node) {
return newNode(Token.THIS);
}
Node processLabeledStatement(LabelledStatementTree labelTree) {
Node statement = transform(labelTree.statement);
if (statement.isFunction()) {
errorReporter.error(
"Functions can only be declared at top level or inside a block.",
sourceName, lineno(labelTree), charno(labelTree));
} else if (statement.isClass()) {
errorReporter.error(
"Classes can only be declared at top level or inside a block.",
sourceName, lineno(labelTree), charno(labelTree));
}
return newNode(Token.LABEL,
transformLabelName(labelTree.name),
statement);
}
Node processName(IdentifierExpressionTree nameNode) {
return processName(nameNode, false);
}
Node processName(IdentifierExpressionTree nameNode, boolean asString) {
return processName(nameNode.identifierToken, asString);
}
Node processName(IdentifierToken identifierToken) {
return processName(identifierToken, false);
}
Node processName(IdentifierToken identifierToken, boolean asString) {
Node node;
if (asString) {
node = newStringNode(Token.STRING, identifierToken.value);
} else {
JSDocInfo info = handleJsDoc(identifierToken);
maybeWarnReservedKeyword(identifierToken);
node = newStringNode(Token.NAME, identifierToken.value);
if (info != null) {
node.setJSDocInfo(info);
}
}
setSourceInfo(node, identifierToken);
return node;
}
Node processString(LiteralToken token) {
checkArgument(token.type == TokenType.STRING);
Node node = newStringNode(Token.STRING, normalizeString(token, false));
setSourceInfo(node, token);
return node;
}
Node processTemplateLiteralToken(LiteralToken token) {
checkArgument(
token.type == TokenType.NO_SUBSTITUTION_TEMPLATE
|| token.type == TokenType.TEMPLATE_HEAD
|| token.type == TokenType.TEMPLATE_MIDDLE
|| token.type == TokenType.TEMPLATE_TAIL);
Node node = newStringNode(normalizeString(token, true));
node.putProp(Node.RAW_STRING_VALUE, token.value);
setSourceInfo(node, token);
return node;
}
Node processNameWithInlineJSDoc(IdentifierToken identifierToken) {
JSDocInfo info = handleInlineJsDoc(identifierToken);
maybeWarnReservedKeyword(identifierToken);
Node node = newStringNode(Token.NAME, identifierToken.value);
if (info != null) {
node.setJSDocInfo(info);
}
setSourceInfo(node, identifierToken);
return node;
}
private void maybeWarnKeywordProperty(Node node) {
if (TokenStream.isKeyword(node.getString())) {
features = features.with(Feature.KEYWORDS_AS_PROPERTIES);
if (config.languageMode() == LanguageMode.ECMASCRIPT3) {
errorReporter.warning(INVALID_ES3_PROP_NAME, sourceName,
node.getLineno(), node.getCharno());
}
}
}
private void maybeWarnReservedKeyword(IdentifierToken token) {
String identifier = token.value;
boolean isIdentifier = false;
if (TokenStream.isKeyword(identifier)) {
features = features.with(Feature.ES3_KEYWORDS_AS_IDENTIFIERS);
isIdentifier = config.languageMode() == LanguageMode.ECMASCRIPT3;
}
if (reservedKeywords != null && reservedKeywords.contains(identifier)) {
features = features.with(Feature.KEYWORDS_AS_PROPERTIES);
isIdentifier = config.languageMode() == LanguageMode.ECMASCRIPT3;
}
if (isIdentifier) {
errorReporter.error(
"identifier is a reserved word",
sourceName,
lineno(token.location.start),
charno(token.location.start));
}
}
Node processNewExpression(NewExpressionTree exprNode) {
Node node = newNode(
Token.NEW,
transform(exprNode.operand));
if (exprNode.arguments != null) {
for (ParseTree arg : exprNode.arguments.arguments) {
node.addChildToBack(transform(arg));
}
}
return node;
}
Node processNumberLiteral(LiteralExpressionTree literalNode) {
double value = normalizeNumber(literalNode.literalToken.asLiteral());
Node number = newNumberNode(value);
setSourceInfo(number, literalNode);
return number;
}
Node processObjectLiteral(ObjectLiteralExpressionTree objTree) {
Node node = newNode(Token.OBJECTLIT);
boolean maybeWarn = false;
for (ParseTree el : objTree.propertyNameAndValues) {
if (el.type == ParseTreeType.DEFAULT_PARAMETER) {
// (e.g. var o = { x=4 };) This is only parsed for compatibility with object patterns.
errorReporter.error(
"Default value cannot appear at top level of an object literal.",
sourceName,
lineno(el), 0);
continue;
} else if (el.type == ParseTreeType.GET_ACCESSOR && maybeReportGetter(el)) {
continue;
} else if (el.type == ParseTreeType.SET_ACCESSOR && maybeReportSetter(el)) {
continue;
}
Node key = transform(el);
if (!key.isComputedProp()
&& !key.isQuotedString()
&& !key.isSpread()
&& !currentFileIsExterns) {
maybeWarnKeywordProperty(key);
}
if (key.isSpread()) {
maybeWarnForFeature(el, Feature.OBJECT_LITERALS_WITH_SPREAD);
}
if (key.isShorthandProperty()) {
maybeWarn = true;
}
node.addChildToBack(key);
}
if (maybeWarn) {
maybeWarnForFeature(objTree, Feature.EXTENDED_OBJECT_LITERALS);
}
return node;
}
Node processComputedPropertyDefinition(ComputedPropertyDefinitionTree tree) {
maybeWarnForFeature(tree, Feature.COMPUTED_PROPERTIES);
return newNode(Token.COMPUTED_PROP,
transform(tree.property), transform(tree.value));
}
Node processComputedPropertyMemberVariable(ComputedPropertyMemberVariableTree tree) {
maybeWarnForFeature(tree, Feature.COMPUTED_PROPERTIES);
maybeWarnTypeSyntax(tree, Feature.MEMBER_VARIABLE_IN_CLASS);
Node n = newNode(Token.COMPUTED_PROP, transform(tree.property));
maybeProcessType(n, tree.declaredType);
n.putBooleanProp(Node.COMPUTED_PROP_VARIABLE, true);
n.putProp(Node.ACCESS_MODIFIER, tree.access);
n.setStaticMember(tree.isStatic);
maybeProcessAccessibilityModifier(tree, n, tree.access);
return n;
}
Node processComputedPropertyMethod(ComputedPropertyMethodTree tree) {
maybeWarnForFeature(tree, Feature.COMPUTED_PROPERTIES);
Node n = newNode(Token.COMPUTED_PROP,
transform(tree.property), transform(tree.method));
n.putBooleanProp(Node.COMPUTED_PROP_METHOD, true);
if (tree.method.asFunctionDeclaration().isStatic) {
n.setStaticMember(true);
}
maybeProcessAccessibilityModifier(tree, n, tree.access);
return n;
}
Node processComputedPropertyGetter(ComputedPropertyGetterTree tree) {
maybeWarnForFeature(tree, Feature.COMPUTED_PROPERTIES);
Node key = transform(tree.property);
Node body = transform(tree.body);
Node function = IR.function(IR.name(""), IR.paramList(), body);
function.useSourceInfoIfMissingFromForTree(body);
Node n = newNode(Token.COMPUTED_PROP, key, function);
n.putBooleanProp(Node.COMPUTED_PROP_GETTER, true);
n.putBooleanProp(Node.STATIC_MEMBER, tree.isStatic);
return n;
}
Node processComputedPropertySetter(ComputedPropertySetterTree tree) {
maybeWarnForFeature(tree, Feature.COMPUTED_PROPERTIES);
Node key = transform(tree.property);
Node body = transform(tree.body);
Node paramList = IR.paramList(safeProcessName(tree.parameter));
Node function = IR.function(IR.name(""), paramList, body);
function.useSourceInfoIfMissingFromForTree(body);
Node n = newNode(Token.COMPUTED_PROP, key, function);
n.putBooleanProp(Node.COMPUTED_PROP_SETTER, true);
n.putBooleanProp(Node.STATIC_MEMBER, tree.isStatic);
return n;
}
Node processGetAccessor(GetAccessorTree tree) {
Node key = processObjectLitKeyAsString(tree.propertyName);
key.setToken(Token.GETTER_DEF);
Node body = transform(tree.body);
Node dummyName = newStringNode(Token.NAME, "");
setSourceInfo(dummyName, tree.body);
Node paramList = newNode(Token.PARAM_LIST);
setSourceInfo(paramList, tree.body);
Node value = newNode(Token.FUNCTION, dummyName, paramList, body);
setSourceInfo(value, tree.body);
key.addChildToFront(value);
maybeProcessType(value, tree.returnType);
key.setStaticMember(tree.isStatic);
return key;
}
Node processSetAccessor(SetAccessorTree tree) {
Node key = processObjectLitKeyAsString(tree.propertyName);
key.setToken(Token.SETTER_DEF);
Node body = transform(tree.body);
Node dummyName = newStringNode(Token.NAME, "");
setSourceInfo(dummyName, tree.propertyName);
Node paramList = newNode(Token.PARAM_LIST, safeProcessName(tree.parameter));
setSourceInfo(paramList, tree.parameter);
maybeProcessType(paramList.getFirstChild(), tree.type);
Node value = newNode(Token.FUNCTION, dummyName, paramList, body);
setSourceInfo(value, tree.body);
key.addChildToFront(value);
key.setStaticMember(tree.isStatic);
return key;
}
Node processPropertyNameAssignment(PropertyNameAssignmentTree tree) {
// TODO(tbreisacher): Allow inline JSDoc here (but then forbid it in CheckJSDoc)
// so that it's clear we don't support annotations like
// function f({x: /** string */ y}) {}
Node key = processObjectLitKeyAsString(tree.name);
key.setToken(Token.STRING_KEY);
if (tree.value != null) {
key.addChildToFront(transform(tree.value));
} else {
Node value = key.cloneNode();
key.setShorthandProperty(true);
value.setToken(Token.NAME);
key.addChildToFront(value);
}
return key;
}
private Node safeProcessName(IdentifierToken identifierToken) {
if (identifierToken == null) {
return createMissingExpressionNode();
} else {
return processName(identifierToken);
}
}
private void checkParenthesizedExpression(ParenExpressionTree exprNode) {
if (exprNode.expression.type == ParseTreeType.COMMA_EXPRESSION) {
List commaNodes = exprNode.expression.asCommaExpression().expressions;
ParseTree lastChild = Iterables.getLast(commaNodes);
if (lastChild.type == ParseTreeType.REST_PARAMETER) {
errorReporter.error(
"A rest parameter must be in a parameter list.",
sourceName,
lineno(lastChild),
charno(lastChild));
}
}
}
Node processParenthesizedExpression(ParenExpressionTree exprNode) {
checkParenthesizedExpression(exprNode);
return transform(exprNode.expression);
}
Node processPropertyGet(MemberExpressionTree getNode) {
Node leftChild = transform(getNode.operand);
IdentifierToken nodeProp = getNode.memberName;
Node rightChild = processObjectLitKeyAsString(nodeProp);
if (!rightChild.isQuotedString() && !currentFileIsExterns) {
maybeWarnKeywordProperty(rightChild);
}
return newNode(Token.GETPROP, leftChild, rightChild);
}
Node processRegExpLiteral(LiteralExpressionTree literalTree) {
LiteralToken token = literalTree.literalToken.asLiteral();
Node literalStringNode = newStringNode(normalizeRegex(token));
// TODO(johnlenz): fix the source location.
setSourceInfo(literalStringNode, token);
Node node = newNode(Token.REGEXP, literalStringNode);
String rawRegex = token.value;
int lastSlash = rawRegex.lastIndexOf('/');
String flags = "";
if (lastSlash < rawRegex.length()) {
flags = rawRegex.substring(lastSlash + 1);
}
validateRegExpFlags(literalTree, flags);
if (!flags.isEmpty()) {
Node flagsNode = newStringNode(flags);
// TODO(johnlenz): fix the source location.
setSourceInfo(flagsNode, token);
node.addChildToBack(flagsNode);
}
return node;
}
private void validateRegExpFlags(LiteralExpressionTree tree, String flags) {
for (char flag : Lists.charactersOf(flags)) {
switch (flag) {
case 'g': case 'i': case 'm':
break;
case 'u': case 'y':
Feature feature = flag == 'u' ? Feature.REGEXP_FLAG_U : Feature.REGEXP_FLAG_Y;
maybeWarnForFeature(tree, feature);
break;
default:
errorReporter.error(
"Invalid RegExp flag '" + flag + "'",
sourceName,
lineno(tree), charno(tree));
}
}
}
Node processReturnStatement(ReturnStatementTree statementNode) {
Node node = newNode(Token.RETURN);
if (statementNode.expression != null) {
node.addChildToBack(transform(statementNode.expression));
}
return node;
}
Node processStringLiteral(LiteralExpressionTree literalTree) {
LiteralToken token = literalTree.literalToken.asLiteral();
Node n = processString(token);
String value = n.getString();
if (value.indexOf('\u000B') != -1) {
// NOTE(nicksantos): In JavaScript, there are 3 ways to
// represent a vertical tab: \v, \x0B, \u000B.
// The \v notation was added later, and is not understood
// on IE. So we need to preserve it as-is. This is really
// obnoxious, because we do not have a good way to represent
// how the original string was encoded without making the
// representation of strings much more complicated.
//
// To handle this, we look at the original source test, and
// mark the string as \v-encoded or not. If a string is
// \v encoded, then all the vertical tabs in that string
// will be encoded with a \v.
int start = token.location.start.offset;
int end = token.location.end.offset;
if (start < sourceString.length() &&
(sourceString.substring(
start, Math.min(sourceString.length(), end)).contains("\\v"))) {
n.putBooleanProp(Node.SLASH_V, true);
}
}
return n;
}
Node processTemplateLiteral(TemplateLiteralExpressionTree tree) {
maybeWarnForFeature(tree, Feature.TEMPLATE_LITERALS);
Node templateLitNode = newNode(Token.TEMPLATELIT);
setSourceInfo(templateLitNode, tree);
Node node = tree.operand == null
? templateLitNode
: newNode(Token.TAGGED_TEMPLATELIT, transform(tree.operand), templateLitNode);
for (ParseTree child : tree.elements) {
templateLitNode.addChildToBack(transform(child));
}
return node;
}
Node processTemplateLiteralPortion(TemplateLiteralPortionTree tree) {
return processTemplateLiteralToken(tree.value.asLiteral());
}
Node processTemplateSubstitution(TemplateSubstitutionTree tree) {
return newNode(Token.TEMPLATELIT_SUB, transform(tree.expression));
}
Node processSwitchCase(CaseClauseTree caseNode) {
ParseTree expr = caseNode.expression;
Node node = newNode(Token.CASE, transform(expr));
Node block = newNode(Token.BLOCK);
block.setIsAddedBlock(true);
setSourceInfo(block, caseNode);
if (caseNode.statements != null) {
for (ParseTree child : caseNode.statements) {
block.addChildToBack(transform(child));
}
}
node.addChildToBack(block);
return node;
}
Node processSwitchDefault(DefaultClauseTree caseNode) {
Node node = newNode(Token.DEFAULT_CASE);
Node block = newNode(Token.BLOCK);
block.setIsAddedBlock(true);
setSourceInfo(block, caseNode);
if (caseNode.statements != null) {
for (ParseTree child : caseNode.statements) {
block.addChildToBack(transform(child));
}
}
node.addChildToBack(block);
return node;
}
Node processSwitchStatement(SwitchStatementTree statementNode) {
Node node = newNode(Token.SWITCH,
transform(statementNode.expression));
for (ParseTree child : statementNode.caseClauses) {
node.addChildToBack(transform(child));
}
return node;
}
Node processThrowStatement(ThrowStatementTree statementNode) {
return newNode(Token.THROW,
transform(statementNode.value));
}
Node processTryStatement(TryStatementTree statementNode) {
Node node = newNode(Token.TRY,
transformBlock(statementNode.body));
Node block = newNode(Token.BLOCK);
boolean lineSet = false;
ParseTree cc = statementNode.catchBlock;
if (cc != null) {
// Mark the enclosing block at the same line as the first catch
// clause.
setSourceInfo(block, cc);
lineSet = true;
block.addChildToBack(transform(cc));
}
node.addChildToBack(block);
ParseTree finallyBlock = statementNode.finallyBlock;
if (finallyBlock != null) {
node.addChildToBack(transformBlock(finallyBlock));
}
// If we didn't set the line on the catch clause, then
// we've got an empty catch clause. Set its line to be the same
// as the finally block (to match Old Rhino's behavior.)
if (!lineSet && (finallyBlock != null)) {
setSourceInfo(block, finallyBlock);
}
return node;
}
Node processCatchClause(CatchTree clauseNode) {
return newNode(Token.CATCH,
transform(clauseNode.exception),
transformBlock(clauseNode.catchBody));
}
Node processFinally(FinallyTree finallyNode) {
return transformBlock(finallyNode.block);
}
Node processUnaryExpression(UnaryExpressionTree exprNode) {
Token type = transformUnaryTokenType(exprNode.operator.type);
Node operand = transform(exprNode.operand);
if (type == Token.NEG && operand.isNumber()) {
operand.setDouble(-operand.getDouble());
return operand;
} else {
if (type == Token.DELPROP
&& !(operand.isGetProp()
|| operand.isGetElem()
|| operand.isName())) {
String msg =
"Invalid delete operand. Only properties can be deleted.";
errorReporter.error(
msg,
sourceName,
operand.getLineno(), 0);
}
return newNode(type, operand);
}
}
Node processUpdateExpression(UpdateExpressionTree updateExpr) {
Token type = transformUpdateTokenType(updateExpr.operator.type);
Node operand = transform(updateExpr.operand);
return createUpdateNode(
type, updateExpr.operatorPosition == OperatorPosition.POSTFIX, operand);
}
private Node createUpdateNode(Token type, boolean postfix, Node operand) {
Node assignTarget = operand.isCast() ? operand.getFirstChild() : operand;
if (!assignTarget.isValidAssignmentTarget()) {
errorReporter.error(
SimpleFormat.format("Invalid %s %s operand.",
(postfix ? "postfix" : "prefix"),
(type == Token.INC ? "increment" : "decrement")),
sourceName,
operand.getLineno(),
operand.getCharno());
}
Node node = newNode(type, operand);
node.putBooleanProp(Node.INCRDECR_PROP, postfix);
return node;
}
Node processVariableStatement(VariableStatementTree stmt) {
// TODO(moz): Figure out why we still need the special handling
return transformDispatcher.process(stmt.declarations);
}
Node processVariableDeclarationList(VariableDeclarationListTree decl) {
Token declType;
switch (decl.declarationType) {
case CONST:
maybeWarnForFeature(decl, Feature.CONST_DECLARATIONS);
declType = Token.CONST;
break;
case LET:
maybeWarnForFeature(decl, Feature.LET_DECLARATIONS);
declType = Token.LET;
break;
case VAR:
declType = Token.VAR;
break;
default:
throw new IllegalStateException();
}
Node node = newNode(declType);
for (VariableDeclarationTree child : decl.declarations) {
node.addChildToBack(transformNodeWithInlineJsDoc(child));
}
return node;
}
Node processVariableDeclaration(VariableDeclarationTree decl) {
Node node = transformNodeWithInlineJsDoc(decl.lvalue);
Node lhs = node.isDestructuringPattern() ? newNode(Token.DESTRUCTURING_LHS, node) : node;
if (decl.initializer != null) {
Node initializer = transform(decl.initializer);
lhs.addChildToBack(initializer);
setLength(lhs, decl.location.start, decl.location.end);
}
maybeProcessType(lhs, decl.declaredType);
return lhs;
}
Node processWhileLoop(WhileStatementTree stmt) {
return newNode(
Token.WHILE,
transform(stmt.condition),
transformBlock(stmt.body));
}
Node processWithStatement(WithStatementTree stmt) {
return newNode(
Token.WITH,
transform(stmt.expression),
transformBlock(stmt.body));
}
/**
* @param tree unused
*/
Node processMissingExpression(MissingPrimaryExpressionTree tree) {
// This will already have been reported as an error by the parser.
// Try to create something valid that ide mode might be able to
// continue with.
return createMissingExpressionNode();
}
private Node createMissingNameNode() {
return newStringNode(Token.NAME, "__missing_name__");
}
private Node createMissingExpressionNode() {
return newStringNode(Token.NAME, "__missing_expression__");
}
Node processIllegalToken(ParseTree node) {
errorReporter.error(
"Unsupported syntax: " + node.type, sourceName, lineno(node), 0);
return newNode(Token.EMPTY);
}
/** Reports an illegal getter and returns true if the language mode is too low. */
boolean maybeReportGetter(ParseTree node) {
features = features.with(Feature.GETTER);
if (config.languageMode() == LanguageMode.ECMASCRIPT3) {
errorReporter.error(
GETTER_ERROR_MESSAGE,
sourceName,
lineno(node), 0);
return true;
}
return false;
}
/** Reports an illegal setter and returns true if the language mode is too low. */
boolean maybeReportSetter(ParseTree node) {
features = features.with(Feature.SETTER);
if (config.languageMode() == LanguageMode.ECMASCRIPT3) {
errorReporter.error(
SETTER_ERROR_MESSAGE,
sourceName,
lineno(node), 0);
return true;
}
return false;
}
Node processBooleanLiteral(LiteralExpressionTree literal) {
return newNode(transformBooleanTokenType(
literal.literalToken.type));
}
/**
* @param literal unused
*/
Node processNullLiteral(LiteralExpressionTree literal) {
return newNode(Token.NULL);
}
/**
* @param literal unused
*/
Node processNull(NullTree literal) {
// NOTE: This is not a NULL literal but a placeholder node such as in
// an array with "holes".
return newNode(Token.EMPTY);
}
Node processCommaExpression(CommaExpressionTree tree) {
Node root = newNode(Token.COMMA);
SourcePosition start = tree.expressions.get(0).location.start;
SourcePosition end = tree.expressions.get(1).location.end;
setSourceInfo(root, start, end);
for (ParseTree expr : tree.expressions) {
int count = root.getChildCount();
if (count < 2) {
root.addChildToBack(transform(expr));
} else {
end = expr.location.end;
root = newNode(Token.COMMA, root, transform(expr));
setSourceInfo(root, start, end);
}
}
return root;
}
Node processClassDeclaration(ClassDeclarationTree tree) {
maybeWarnForFeature(tree, Feature.CLASSES);
Node name = transformOrEmpty(tree.name, tree);
maybeProcessGenerics(name, tree.generics);
Node superClass = transformOrEmpty(tree.superClass, tree);
Node interfaces = transformListOrEmpty(Token.IMPLEMENTS, tree.interfaces);
Node body = newNode(Token.CLASS_MEMBERS);
setSourceInfo(body, tree);
for (ParseTree child : tree.elements) {
if (child.type == ParseTreeType.MEMBER_VARIABLE
|| child.type == ParseTreeType.COMPUTED_PROPERTY_MEMBER_VARIABLE) {
maybeWarnTypeSyntax(child, Feature.MEMBER_VARIABLE_IN_CLASS);
}
body.addChildToBack(transform(child));
}
Node classNode = newNode(Token.CLASS, name, superClass, body);
if (!interfaces.isEmpty()) {
maybeWarnTypeSyntax(tree, Feature.IMPLEMENTS);
classNode.putProp(Node.IMPLEMENTS, interfaces);
}
return classNode;
}
Node processInterfaceDeclaration(InterfaceDeclarationTree tree) {
maybeWarnTypeSyntax(tree, Feature.INTERFACE);
Node name = processName(tree.name);
maybeProcessGenerics(name, tree.generics);
Node superInterfaces = transformListOrEmpty(Token.INTERFACE_EXTENDS, tree.superInterfaces);
Node body = newNode(Token.INTERFACE_MEMBERS);
setSourceInfo(body, tree);
for (ParseTree child : tree.elements) {
body.addChildToBack(transform(child));
}
return newNode(Token.INTERFACE, name, superInterfaces, body);
}
Node processEnumDeclaration(EnumDeclarationTree tree) {
maybeWarnTypeSyntax(tree, Feature.ENUM);
Node name = processName(tree.name);
Node body = newNode(Token.ENUM_MEMBERS);
setSourceInfo(body, tree);
for (ParseTree child : tree.members) {
Node childNode = transform(child);
// NOTE: we may need to "undo" the shorthand property normalization,
// since this syntax has a different meaning in enums.
if (childNode.isShorthandProperty()) {
childNode.removeChild(childNode.getLastChild());
childNode.setShorthandProperty(false);
}
body.addChildToBack(childNode);
}
return newNode(Token.ENUM, name, body);
}
Node processSuper(SuperExpressionTree tree) {
maybeWarnForFeature(tree, Feature.SUPER);
return newNode(Token.SUPER);
}
Node processNewTarget(NewTargetExpressionTree tree) {
maybeWarnForFeature(tree, Feature.NEW_TARGET);
return newNode(Token.NEW_TARGET);
}
Node processMemberVariable(MemberVariableTree tree) {
Node member = newStringNode(Token.MEMBER_VARIABLE_DEF, tree.name.value);
maybeProcessType(member, tree.declaredType);
member.setStaticMember(tree.isStatic);
member.putBooleanProp(Node.OPT_ES6_TYPED, tree.isOptional);
maybeProcessAccessibilityModifier(tree, member, tree.access);
return member;
}
Node processYield(YieldExpressionTree tree) {
Node yield = newNode(Token.YIELD);
if (tree.expression != null) {
yield.addChildToBack(transform(tree.expression));
}
yield.setYieldAll(tree.isYieldAll);
return yield;
}
Node processAwait(AwaitExpressionTree tree) {
maybeWarnForFeature(tree, Feature.ASYNC_FUNCTIONS);
Node await = newNode(Token.AWAIT);
await.addChildToBack(transform(tree.expression));
return await;
}
Node processExportDecl(ExportDeclarationTree tree) {
maybeWarnForFeature(tree, Feature.MODULES);
Node decls = null;
if (tree.isExportAll) {
checkState(tree.declaration == null && tree.exportSpecifierList == null);
} else if (tree.declaration != null) {
checkState(tree.exportSpecifierList == null);
decls = transform(tree.declaration);
} else {
decls = transformList(Token.EXPORT_SPECS, tree.exportSpecifierList);
}
if (decls == null) {
decls = newNode(Token.EMPTY);
}
setSourceInfo(decls, tree);
Node export = newNode(Token.EXPORT, decls);
if (tree.from != null) {
Node from = processString(tree.from);
export.addChildToBack(from);
}
export.putBooleanProp(Node.EXPORT_ALL_FROM, tree.isExportAll);
export.putBooleanProp(Node.EXPORT_DEFAULT, tree.isDefault);
return export;
}
Node processExportSpec(ExportSpecifierTree tree) {
Node importedName = processName(tree.importedName, true);
importedName.setToken(Token.NAME);
Node exportSpec = newNode(Token.EXPORT_SPEC, importedName);
if (tree.destinationName == null) {
exportSpec.setShorthandProperty(true);
exportSpec.addChildToBack(importedName.cloneTree());
} else {
Node destinationName = processName(tree.destinationName, true);
destinationName.setToken(Token.NAME);
exportSpec.addChildToBack(destinationName);
}
return exportSpec;
}
Node processImportDecl(ImportDeclarationTree tree) {
maybeWarnForFeature(tree, Feature.MODULES);
Node firstChild = transformOrEmpty(tree.defaultBindingIdentifier, tree);
Node secondChild = (tree.nameSpaceImportIdentifier != null)
? newStringNode(Token.IMPORT_STAR, tree.nameSpaceImportIdentifier.value)
: transformListOrEmpty(Token.IMPORT_SPECS, tree.importSpecifierList);
setSourceInfo(secondChild, tree);
Node thirdChild = processString(tree.moduleSpecifier);
return newNode(Token.IMPORT, firstChild, secondChild, thirdChild);
}
Node processImportSpec(ImportSpecifierTree tree) {
Node importedName = processName(tree.importedName, true);
importedName.setToken(Token.NAME);
Node importSpec = newNode(Token.IMPORT_SPEC, importedName);
if (tree.destinationName == null) {
importSpec.setShorthandProperty(true);
importSpec.addChildToBack(importedName.cloneTree());
} else {
importSpec.addChildToBack(processName(tree.destinationName));
}
return importSpec;
}
Node processTypeName(TypeNameTree tree) {
Node typeNode;
if (tree.segments.size() == 1) {
String typeName = tree.segments.get(0);
switch (typeName) {
case "any":
typeNode = cloneProps(anyType());
break;
case "number":
typeNode = cloneProps(numberType());
break;
case "boolean":
typeNode = cloneProps(booleanType());
break;
case "string":
typeNode = cloneProps(stringType());
break;
case "void":
typeNode = cloneProps(voidType());
break;
case "undefined":
typeNode = cloneProps(undefinedType());
break;
default:
typeNode = cloneProps(namedType(tree.segments));
break;
}
} else {
typeNode = cloneProps(namedType(tree.segments));
}
setSourceInfo(typeNode, tree);
return typeNode;
}
Node processTypedParameter(TypedParameterTree typeAnnotation) {
Node param = transform(typeAnnotation.param);
maybeProcessType(param, typeAnnotation.typeAnnotation);
return param;
}
Node processOptionalParameter(OptionalParameterTree optionalParam) {
maybeWarnTypeSyntax(optionalParam, Feature.OPTIONAL_PARAMETER);
Node param = transform(optionalParam.param);
param.putBooleanProp(Node.OPT_ES6_TYPED, true);
return param;
}
private void maybeProcessType(Node typeTarget, ParseTree typeTree) {
if (typeTree != null) {
recordJsDoc(typeTree.location, typeTarget.getJSDocInfo());
Node typeExpression = convertTypeTree(typeTree);
if (typeExpression.isString()) {
typeExpression = cloneProps(
new TypeDeclarationNode(Token.STRING, typeExpression.getString()));
}
typeTarget.setDeclaredTypeExpression((TypeDeclarationNode) typeExpression);
}
}
private void maybeProcessGenerics(Node n, GenericTypeListTree generics) {
if (generics != null) {
maybeWarnTypeSyntax(generics, Feature.GENERICS);
n.putProp(Node.GENERIC_TYPE_LIST, transform(generics));
}
}
private Node convertTypeTree(ParseTree typeTree) {
maybeWarnTypeSyntax(typeTree, Feature.TYPE_ANNOTATION);
return transform(typeTree);
}
Node processParameterizedType(ParameterizedTypeTree tree) {
ImmutableList.Builder arguments = ImmutableList.builder();
for (ParseTree arg : tree.typeArguments) {
arguments.add((TypeDeclarationNode) transform(arg));
}
TypeDeclarationNode typeName = (TypeDeclarationNode) transform(tree.typeName);
return cloneProps(parameterizedType(typeName, arguments.build()));
}
Node processArrayType(ArrayTypeTree tree) {
return cloneProps(arrayType(transform(tree.elementType)));
}
Node processRecordType(RecordTypeTree tree) {
TypeDeclarationNode node = new TypeDeclarationNode(Token.RECORD_TYPE);
for (ParseTree child : tree.members) {
node.addChildToBack(transform(child));
}
return cloneProps(node);
}
Node processUnionType(UnionTypeTree tree) {
ImmutableList.Builder options = ImmutableList.builder();
for (ParseTree option : tree.types) {
options.add((TypeDeclarationNode) transform(option));
}
return cloneProps(unionType(options.build()));
}
Node processTypeAlias(TypeAliasTree tree) {
maybeWarnTypeSyntax(tree, Feature.TYPE_ALIAS);
Node typeAlias = newStringNode(Token.TYPE_ALIAS, tree.alias.value);
typeAlias.addChildToFront(transform(tree.original));
return typeAlias;
}
Node processAmbientDeclaration(AmbientDeclarationTree tree) {
maybeWarnTypeSyntax(tree, Feature.AMBIENT_DECLARATION);
return newNode(Token.DECLARE, transform(tree.declaration));
}
Node processNamespaceDeclaration(NamespaceDeclarationTree tree) {
maybeWarnTypeSyntax(tree, Feature.NAMESPACE_DECLARATION);
Node name = processNamespaceName(tree.name);
Node body = newNode(Token.NAMESPACE_ELEMENTS);
setSourceInfo(body, tree);
for (ParseTree child : tree.elements) {
body.addChildToBack(transform(child));
}
return newNode(Token.NAMESPACE, name, body);
}
Node processNamespaceName(NamespaceNameTree name) {
ImmutableList segments = name.segments;
if (segments.size() == 1) {
Node namespaceName = newStringNode(Token.NAME, segments.get(0));
setSourceInfo(namespaceName, name);
return namespaceName;
} else {
Iterator segmentsIt = segments.iterator();
Node node = IR.name(segmentsIt.next());
setSourceInfo(node, name);
while (segmentsIt.hasNext()) {
Node string = newStringNode(Token.STRING, segmentsIt.next());
setSourceInfo(string, name);
node = newNode(Token.GETPROP, node, string);
setSourceInfo(node, name);
}
return node;
}
}
Node processIndexSignature(IndexSignatureTree tree) {
maybeWarnTypeSyntax(tree, Feature.INDEX_SIGNATURE);
Node name = transform(tree.name);
Node indexType = name.getDeclaredTypeExpression();
if (indexType.getToken() != Token.NUMBER_TYPE && indexType.getToken() != Token.STRING_TYPE) {
errorReporter.error(
"Index signature parameter type must be 'string' or 'number'",
sourceName,
lineno(tree.name),
charno(tree.name));
}
Node signature = newNode(Token.INDEX_SIGNATURE, name);
maybeProcessType(signature, tree.declaredType);
return signature;
}
Node processCallSignature(CallSignatureTree tree) {
maybeWarnTypeSyntax(
tree, tree.isNew ? Feature.CONSTRUCTOR_SIGNATURE : Feature.CALL_SIGNATURE);
Node signature = newNode(Token.CALL_SIGNATURE, transform(tree.formalParameterList));
maybeProcessType(signature, tree.returnType);
maybeProcessGenerics(signature, tree.generics);
signature.putBooleanProp(Node.CONSTRUCT_SIGNATURE, tree.isNew);
return signature;
}
private boolean checkParameters(ImmutableList params) {
boolean seenOptional = false;
boolean good = true;
for (int i = 0; i < params.size(); i++) {
ParseTree param = params.get(i);
Node type = null;
if (param.type == ParseTreeType.TYPED_PARAMETER) {
TypedParameterTree typedParam = param.asTypedParameter();
type = transform(typedParam.typeAnnotation);
param = typedParam.param;
}
switch (param.type) {
case IDENTIFIER_EXPRESSION:
if (seenOptional) {
errorReporter.error(
"A required parameter cannot follow an optional parameter.",
sourceName,
lineno(param),
charno(param));
good = false;
}
break;
case OPTIONAL_PARAMETER:
seenOptional = true;
break;
case REST_PARAMETER:
if (i != params.size() - 1) {
errorReporter.error(
"A rest parameter must be last in a parameter list.",
sourceName,
lineno(param),
charno(param));
good = false;
}
if (type != null && type.getToken() != Token.ARRAY_TYPE) {
errorReporter.error(
"A rest parameter must be of an array type.",
sourceName,
lineno(param),
charno(param));
good = false;
}
break;
default:
}
}
return good;
}
Node processFunctionType(FunctionTypeTree tree) {
LinkedHashMap requiredParams = new LinkedHashMap<>();
LinkedHashMap optionalParams = new LinkedHashMap<>();
String restName = null;
TypeDeclarationNode restType = null;
if (checkParameters(tree.formalParameterList.parameters)) {
for (ParseTree param : tree.formalParameterList.parameters) {
TypeDeclarationNode type = null;
if (param.type == ParseTreeType.TYPED_PARAMETER) {
TypedParameterTree typedParam = param.asTypedParameter();
type = (TypeDeclarationNode) transform(typedParam.typeAnnotation);
param = typedParam.param;
}
switch (param.type) {
case IDENTIFIER_EXPRESSION:
requiredParams.put(
param.asIdentifierExpression().identifierToken.value,
type);
break;
case OPTIONAL_PARAMETER:
maybeWarnTypeSyntax(param, Feature.OPTIONAL_PARAMETER);
optionalParams.put(
param.asOptionalParameter().param.asIdentifierExpression()
.identifierToken.value,
type);
break;
case REST_PARAMETER:
// TypeScript doesn't allow destructuring parameters, so the assignment target must
// be an identifier.
restName =
param
.asRestParameter()
.assignmentTarget
.asIdentifierExpression()
.identifierToken
.value;
restType = type;
break;
default:
throw new IllegalStateException("Illegal parameter type: " + param.type);
}
}
}
return cloneProps(functionType(transform(tree.returnType), requiredParams, optionalParams,
restName, restType));
}
Node processTypeQuery(TypeQueryTree tree) {
Iterator segmentsIt = tree.segments.iterator();
Node node = newStringNode(Token.NAME, segmentsIt.next());
while (segmentsIt.hasNext()) {
node = IR.getprop(node, IR.string(segmentsIt.next()));
}
return cloneProps(new TypeDeclarationNode(Token.TYPEOF, node));
}
Node processGenericTypeList(GenericTypeListTree tree) {
Node list = newNode(Token.GENERIC_TYPE_LIST);
for (Map.Entry generic : tree.generics.entrySet()) {
Node type = newStringNode(Token.GENERIC_TYPE, generic.getKey().value);
ParseTree bound = generic.getValue();
if (bound != null) {
type.addChildToBack(transform(bound));
}
list.addChildToBack(type);
}
return list;
}
private Node transformList(
Token type, ImmutableList list) {
Node n = newNode(type);
for (ParseTree tree : list) {
n.addChildToBack(transform(tree));
}
return n;
}
private Node transformListOrEmpty(
Token type, ImmutableList list) {
if (list == null || list.isEmpty()) {
return newNode(Token.EMPTY);
} else {
return transformList(type, list);
}
}
void maybeProcessAccessibilityModifier(ParseTree parseTree, Node n, @Nullable TokenType type) {
if (type != null) {
Visibility access;
switch (type) {
case PUBLIC:
access = Visibility.PUBLIC;
break;
case PROTECTED:
access = Visibility.PROTECTED;
break;
case PRIVATE:
access = Visibility.PRIVATE;
break;
default:
throw new IllegalStateException("Unexpected access modifier type");
}
maybeWarnTypeSyntax(parseTree, Feature.ACCESSIBILITY_MODIFIER);
n.putProp(Node.ACCESS_MODIFIER, access);
}
}
void maybeWarnTypeSyntax(ParseTree node, Feature feature) {
if (config.languageMode() != LanguageMode.TYPESCRIPT) {
errorReporter.warning(
"type syntax is only supported in ES6 typed mode: " + feature,
sourceName,
lineno(node),
charno(node));
}
features = features.with(feature);
recordTypeSyntax(node.location);
}
Node unsupportedLanguageFeature(ParseTree node, String feature) {
errorReporter.error(
"unsupported language feature: " + feature,
sourceName,
lineno(node), charno(node));
return createMissingExpressionNode();
}
Node processLiteralExpression(LiteralExpressionTree expr) {
switch (expr.literalToken.type) {
case NUMBER:
return processNumberLiteral(expr);
case STRING:
return processStringLiteral(expr);
case FALSE:
case TRUE:
return processBooleanLiteral(expr);
case NULL:
return processNullLiteral(expr);
case REGULAR_EXPRESSION:
return processRegExpLiteral(expr);
default:
throw new IllegalStateException("Unexpected literal type: "
+ expr.literalToken.getClass() + " type: "
+ expr.literalToken.type);
}
}
public Node process(ParseTree node) {
switch (node.type) {
case BINARY_OPERATOR:
return processBinaryExpression(node.asBinaryOperator());
case ARRAY_LITERAL_EXPRESSION:
return processArrayLiteral(node.asArrayLiteralExpression());
case TEMPLATE_LITERAL_EXPRESSION:
return processTemplateLiteral(node.asTemplateLiteralExpression());
case TEMPLATE_LITERAL_PORTION:
return processTemplateLiteralPortion(node.asTemplateLiteralPortion());
case TEMPLATE_SUBSTITUTION:
return processTemplateSubstitution(node.asTemplateSubstitution());
case UNARY_EXPRESSION:
return processUnaryExpression(node.asUnaryExpression());
case BLOCK:
return processBlock(node.asBlock());
case BREAK_STATEMENT:
return processBreakStatement(node.asBreakStatement());
case CALL_EXPRESSION:
return processFunctionCall(node.asCallExpression());
case CASE_CLAUSE:
return processSwitchCase(node.asCaseClause());
case DEFAULT_CLAUSE:
return processSwitchDefault(node.asDefaultClause());
case CATCH:
return processCatchClause(node.asCatch());
case CONTINUE_STATEMENT:
return processContinueStatement(node.asContinueStatement());
case DO_WHILE_STATEMENT:
return processDoLoop(node.asDoWhileStatement());
case EMPTY_STATEMENT:
return processEmptyStatement(node.asEmptyStatement());
case EXPRESSION_STATEMENT:
return processExpressionStatement(node.asExpressionStatement());
case DEBUGGER_STATEMENT:
return processDebuggerStatement(node.asDebuggerStatement());
case THIS_EXPRESSION:
return processThisExpression(node.asThisExpression());
case FOR_STATEMENT:
return processForLoop(node.asForStatement());
case FOR_IN_STATEMENT:
return processForInLoop(node.asForInStatement());
case FUNCTION_DECLARATION:
return processFunction(node.asFunctionDeclaration());
case MEMBER_LOOKUP_EXPRESSION:
return processElementGet(node.asMemberLookupExpression());
case MEMBER_EXPRESSION:
return processPropertyGet(node.asMemberExpression());
case CONDITIONAL_EXPRESSION:
return processConditionalExpression(node.asConditionalExpression());
case IF_STATEMENT:
return processIfStatement(node.asIfStatement());
case LABELLED_STATEMENT:
return processLabeledStatement(node.asLabelledStatement());
case PAREN_EXPRESSION:
return processParenthesizedExpression(node.asParenExpression());
case IDENTIFIER_EXPRESSION:
return processName(node.asIdentifierExpression());
case NEW_EXPRESSION:
return processNewExpression(node.asNewExpression());
case OBJECT_LITERAL_EXPRESSION:
return processObjectLiteral(node.asObjectLiteralExpression());
case COMPUTED_PROPERTY_DEFINITION:
return processComputedPropertyDefinition(node.asComputedPropertyDefinition());
case COMPUTED_PROPERTY_GETTER:
return processComputedPropertyGetter(node.asComputedPropertyGetter());
case COMPUTED_PROPERTY_MEMBER_VARIABLE:
return processComputedPropertyMemberVariable(node.asComputedPropertyMemberVariable());
case COMPUTED_PROPERTY_METHOD:
return processComputedPropertyMethod(node.asComputedPropertyMethod());
case COMPUTED_PROPERTY_SETTER:
return processComputedPropertySetter(node.asComputedPropertySetter());
case RETURN_STATEMENT:
return processReturnStatement(node.asReturnStatement());
case UPDATE_EXPRESSION:
return processUpdateExpression(node.asUpdateExpression());
case PROGRAM:
return processAstRoot(node.asProgram());
case LITERAL_EXPRESSION: // STRING, NUMBER, TRUE, FALSE, NULL, REGEXP
return processLiteralExpression(node.asLiteralExpression());
case SWITCH_STATEMENT:
return processSwitchStatement(node.asSwitchStatement());
case THROW_STATEMENT:
return processThrowStatement(node.asThrowStatement());
case TRY_STATEMENT:
return processTryStatement(node.asTryStatement());
case VARIABLE_STATEMENT: // var const let
return processVariableStatement(node.asVariableStatement());
case VARIABLE_DECLARATION_LIST:
return processVariableDeclarationList(node.asVariableDeclarationList());
case VARIABLE_DECLARATION:
return processVariableDeclaration(node.asVariableDeclaration());
case WHILE_STATEMENT:
return processWhileLoop(node.asWhileStatement());
case WITH_STATEMENT:
return processWithStatement(node.asWithStatement());
case COMMA_EXPRESSION:
return processCommaExpression(node.asCommaExpression());
case NULL: // this is not the null literal
return processNull(node.asNull());
case FINALLY:
return processFinally(node.asFinally());
case MISSING_PRIMARY_EXPRESSION:
return processMissingExpression(node.asMissingPrimaryExpression());
case PROPERTY_NAME_ASSIGNMENT:
return processPropertyNameAssignment(node.asPropertyNameAssignment());
case GET_ACCESSOR:
return processGetAccessor(node.asGetAccessor());
case SET_ACCESSOR:
return processSetAccessor(node.asSetAccessor());
case FORMAL_PARAMETER_LIST:
return processFormalParameterList(node.asFormalParameterList());
case CLASS_DECLARATION:
return processClassDeclaration(node.asClassDeclaration());
case SUPER_EXPRESSION:
return processSuper(node.asSuperExpression());
case NEW_TARGET_EXPRESSION:
return processNewTarget(node.asNewTargetExpression());
case YIELD_EXPRESSION:
return processYield(node.asYieldStatement());
case AWAIT_EXPRESSION:
return processAwait(node.asAwaitExpression());
case FOR_OF_STATEMENT:
return processForOf(node.asForOfStatement());
case EXPORT_DECLARATION:
return processExportDecl(node.asExportDeclaration());
case EXPORT_SPECIFIER:
return processExportSpec(node.asExportSpecifier());
case IMPORT_DECLARATION:
return processImportDecl(node.asImportDeclaration());
case IMPORT_SPECIFIER:
return processImportSpec(node.asImportSpecifier());
case ARRAY_PATTERN:
return processArrayPattern(node.asArrayPattern());
case OBJECT_PATTERN:
return processObjectPattern(node.asObjectPattern());
case ASSIGNMENT_REST_ELEMENT:
return processAssignmentRestElement(node.asAssignmentRestElement());
case COMPREHENSION:
return processComprehension(node.asComprehension());
case COMPREHENSION_FOR:
return processComprehensionFor(node.asComprehensionFor());
case COMPREHENSION_IF:
return processComprehensionIf(node.asComprehensionIf());
case DEFAULT_PARAMETER:
return processDefaultParameter(node.asDefaultParameter());
case REST_PARAMETER:
return processRestParameter(node.asRestParameter());
case SPREAD_EXPRESSION:
return processSpreadExpression(node.asSpreadExpression());
// ES6 Typed
case TYPE_NAME:
return processTypeName(node.asTypeName());
case TYPED_PARAMETER:
return processTypedParameter(node.asTypedParameter());
case OPTIONAL_PARAMETER:
return processOptionalParameter(node.asOptionalParameter());
case PARAMETERIZED_TYPE_TREE:
return processParameterizedType(node.asParameterizedType());
case ARRAY_TYPE:
return processArrayType(node.asArrayType());
case RECORD_TYPE:
return processRecordType(node.asRecordType());
case UNION_TYPE:
return processUnionType(node.asUnionType());
case FUNCTION_TYPE:
return processFunctionType(node.asFunctionType());
case TYPE_QUERY:
return processTypeQuery(node.asTypeQuery());
case GENERIC_TYPE_LIST:
return processGenericTypeList(node.asGenericTypeList());
case MEMBER_VARIABLE:
return processMemberVariable(node.asMemberVariable());
case INTERFACE_DECLARATION:
return processInterfaceDeclaration(node.asInterfaceDeclaration());
case ENUM_DECLARATION:
return processEnumDeclaration(node.asEnumDeclaration());
case TYPE_ALIAS:
return processTypeAlias(node.asTypeAlias());
case AMBIENT_DECLARATION:
return processAmbientDeclaration(node.asAmbientDeclaration());
case NAMESPACE_DECLARATION:
return processNamespaceDeclaration(node.asNamespaceDeclaration());
case INDEX_SIGNATURE:
return processIndexSignature(node.asIndexSignature());
case CALL_SIGNATURE:
return processCallSignature(node.asCallSignature());
// TODO(johnlenz): handle these or remove parser support
case ARGUMENT_LIST:
default:
break;
}
return processIllegalToken(node);
}
}
String normalizeRegex(LiteralToken token) {
String value = token.value;
final int lastSlash = value.lastIndexOf('/');
int cur = value.indexOf('\\');
if (cur == -1) {
return value.substring(1, lastSlash);
}
StringBuilder result = new StringBuilder();
int start = 1;
while (cur != -1) {
result.append(value, start, cur);
cur++; // skip the escape char.
char c = value.charAt(cur);
switch (c) {
// Characters for which the backslash is semantically important.
case '^':
case '$':
case '\\':
case '/':
case '.':
case '*':
case '+':
case '?':
case '(':
case ')':
case '[':
case ']':
case '{':
case '}':
case '|':
case '-':
case 'b':
case 'B':
case 'c':
case 'd':
case 'D':
case 'f':
case 'n':
case 'r':
case 's':
case 'S':
case 't':
case 'u':
case 'v':
case 'w':
case 'W':
case 'x':
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
result.append('\\');
// fallthrough
default:
// For all other characters, the backslash has no effect, so just append the next char.
result.append(c);
}
start = cur + 1;
cur = value.indexOf('\\', start);
}
result.append(value, start, lastSlash);
return result.toString();
}
String normalizeString(LiteralToken token, boolean templateLiteral) {
String value = token.value;
if (templateLiteral) {
// and are normalized as for raw string value
value = value.replaceAll("\r\n?", "\n");
}
int start = templateLiteral ? 0 : 1; // skip the leading quote
int cur = value.indexOf('\\');
if (cur == -1) {
// short circuit no escapes.
return templateLiteral ? value : value.substring(1, value.length() - 1);
}
StringBuilder result = new StringBuilder();
while (cur != -1) {
result.append(value, start, cur);
cur += 1; // skip the escape char.
char c = value.charAt(cur);
switch (c) {
case 'b':
result.append('\b');
break;
case 'f':
result.append('\f');
break;
case 'n':
result.append('\n');
break;
case 'r':
result.append('\r');
break;
case 't':
result.append('\t');
break;
case 'v':
result.append('\u000B');
break;
case '\n':
// line continuation, skip the line break
maybeWarnForFeature(token, Feature.STRING_CONTINUATION);
errorReporter.warning(
STRING_CONTINUATION_WARNING,
sourceName,
lineno(token.location.start),
charno(token.location.start));
break;
case '0':
if (cur + 1 >= value.length()) {
break;
}
// fall through
case '1': case '2': case '3': case '4': case '5': case '6': case '7':
char next1 = value.charAt(cur + 1);
if (inStrictContext() || templateLiteral) {
if (c == '0' && !isOctalDigit(next1)) {
// No warning: "\0" followed by a character which is not an octal digit
// is allowed in strict mode.
} else {
errorReporter.warning(OCTAL_STRING_LITERAL_WARNING,
sourceName,
lineno(token.location.start), charno(token.location.start));
}
}
if (!isOctalDigit(next1)) {
result.append((char) octaldigit(c));
} else {
char next2 = value.charAt(cur + 2);
if (!isOctalDigit(next2)) {
result.append((char) (8 * octaldigit(c) + octaldigit(next1)));
cur += 1;
} else {
result.append((char)
(8 * 8 * octaldigit(c) + 8 * octaldigit(next1) + octaldigit(next2)));
cur += 2;
}
}
break;
case 'x':
result.append((char) (
hexdigit(value.charAt(cur + 1)) * 0x10
+ hexdigit(value.charAt(cur + 2))));
cur += 2;
break;
case 'u':
int escapeEnd;
String hexDigits;
if (value.charAt(cur + 1) != '{') {
// Simple escape with exactly four hex digits: \\uXXXX
escapeEnd = cur + 5;
hexDigits = value.substring(cur + 1, escapeEnd);
} else {
// Escape with braces can have any number of hex digits: \\u{XXXXXXX}
escapeEnd = cur + 2;
while (Character.digit(value.charAt(escapeEnd), 0x10) >= 0) {
escapeEnd++;
}
hexDigits = value.substring(cur + 2, escapeEnd);
escapeEnd++;
}
result.append(Character.toChars(Integer.parseInt(hexDigits, 0x10)));
cur = escapeEnd - 1;
break;
case '\'':
case '"':
case '\\':
default:
result.append(c);
break;
}
start = cur + 1;
cur = value.indexOf('\\', start);
}
// skip the trailing quote.
result.append(value, start, templateLiteral ? value.length() : value.length() - 1);
return result.toString();
}
boolean isSupportedForInputLanguageMode(Feature feature) {
return config.languageMode().featureSet.has(feature);
}
boolean isEs5OrBetterMode() {
return config.languageMode().featureSet.contains(FeatureSet.ES5);
}
private boolean inStrictContext() {
// TODO(johnlenz): in ECMASCRIPT5/6 is a "mixed" mode and we should track the context
// that we are in, if we want to support it.
return config.strictMode().isStrict();
}
double normalizeNumber(LiteralToken token) {
String value = token.value;
SourceRange location = token.location;
int length = value.length();
checkState(length > 0);
checkState(value.charAt(0) != '-' && value.charAt(0) != '+');
if (value.charAt(0) == '.') {
return Double.valueOf('0' + value);
} else if (value.charAt(0) == '0' && length > 1) {
switch (value.charAt(1)) {
case '.':
case 'e':
case 'E':
return Double.valueOf(value);
case 'b':
case 'B': {
maybeWarnForFeature(token, Feature.BINARY_LITERALS);
double v = 0;
int c = 1;
while (++c < length) {
v = (v * 2) + binarydigit(value.charAt(c));
}
return v;
}
case 'o':
case 'O': {
maybeWarnForFeature(token, Feature.OCTAL_LITERALS);
double v = 0;
int c = 1;
while (++c < length) {
v = (v * 8) + octaldigit(value.charAt(c));
}
return v;
}
case 'x':
case 'X': {
double v = 0;
int c = 1;
while (++c < length) {
v = (v * 0x10) + hexdigit(value.charAt(c));
}
return v;
}
case '0': case '1': case '2': case '3':
case '4': case '5': case '6': case '7':
double v = 0;
int c = 0;
while (++c < length) {
char digit = value.charAt(c);
if (isOctalDigit(digit)) {
v = (v * 8) + octaldigit(digit);
} else {
errorReporter.error(INVALID_OCTAL_DIGIT, sourceName,
lineno(location.start), charno(location.start));
return 0;
}
}
if (inStrictContext()) {
errorReporter.error(INVALID_ES5_STRICT_OCTAL, sourceName,
lineno(location.start), charno(location.start));
} else {
errorReporter.warning(INVALID_ES5_STRICT_OCTAL, sourceName,
lineno(location.start), charno(location.start));
}
return v;
case '8': case '9':
errorReporter.error(INVALID_OCTAL_DIGIT, sourceName,
lineno(location.start), charno(location.start));
return 0;
default:
throw new IllegalStateException(
"Unexpected character in number literal: " + value.charAt(1));
}
} else {
return Double.valueOf(value);
}
}
private static int binarydigit(char c) {
if (c >= '0' && c <= '1') {
return (c - '0');
}
throw new IllegalStateException("unexpected: " + c);
}
private static boolean isOctalDigit(char c) {
return c >= '0' && c <= '7';
}
private static int octaldigit(char c) {
if (isOctalDigit(c)) {
return (c - '0');
}
throw new IllegalStateException("unexpected: " + c);
}
private static int hexdigit(char c) {
switch (c) {
case '0': return 0;
case '1': return 1;
case '2': return 2;
case '3': return 3;
case '4': return 4;
case '5': return 5;
case '6': return 6;
case '7': return 7;
case '8': return 8;
case '9': return 9;
case 'a': case 'A': return 10;
case 'b': case 'B': return 11;
case 'c': case 'C': return 12;
case 'd': case 'D': return 13;
case 'e': case 'E': return 14;
case 'f': case 'F': return 15;
default: throw new IllegalStateException("unexpected: " + c);
}
}
static Token transformBooleanTokenType(TokenType token) {
switch (token) {
case TRUE:
return Token.TRUE;
case FALSE:
return Token.FALSE;
default:
throw new IllegalStateException(String.valueOf(token));
}
}
static Token transformUpdateTokenType(TokenType token) {
switch (token) {
case PLUS_PLUS:
return Token.INC;
case MINUS_MINUS:
return Token.DEC;
default:
throw new IllegalStateException(String.valueOf(token));
}
}
static Token transformUnaryTokenType(TokenType token) {
switch (token) {
case BANG:
return Token.NOT;
case TILDE:
return Token.BITNOT;
case PLUS:
return Token.POS;
case MINUS:
return Token.NEG;
case DELETE:
return Token.DELPROP;
case TYPEOF:
return Token.TYPEOF;
case VOID:
return Token.VOID;
default:
throw new IllegalStateException(String.valueOf(token));
}
}
static Token transformBinaryTokenType(TokenType token) {
switch (token) {
case BAR:
return Token.BITOR;
case CARET:
return Token.BITXOR;
case AMPERSAND:
return Token.BITAND;
case EQUAL_EQUAL:
return Token.EQ;
case NOT_EQUAL:
return Token.NE;
case OPEN_ANGLE:
return Token.LT;
case LESS_EQUAL:
return Token.LE;
case CLOSE_ANGLE:
return Token.GT;
case GREATER_EQUAL:
return Token.GE;
case LEFT_SHIFT:
return Token.LSH;
case RIGHT_SHIFT:
return Token.RSH;
case UNSIGNED_RIGHT_SHIFT:
return Token.URSH;
case PLUS:
return Token.ADD;
case MINUS:
return Token.SUB;
case STAR:
return Token.MUL;
case SLASH:
return Token.DIV;
case PERCENT:
return Token.MOD;
case STAR_STAR:
return Token.EXPONENT;
case EQUAL_EQUAL_EQUAL:
return Token.SHEQ;
case NOT_EQUAL_EQUAL:
return Token.SHNE;
case IN:
return Token.IN;
case INSTANCEOF:
return Token.INSTANCEOF;
case COMMA:
return Token.COMMA;
case EQUAL:
return Token.ASSIGN;
case BAR_EQUAL:
return Token.ASSIGN_BITOR;
case CARET_EQUAL:
return Token.ASSIGN_BITXOR;
case AMPERSAND_EQUAL:
return Token.ASSIGN_BITAND;
case LEFT_SHIFT_EQUAL:
return Token.ASSIGN_LSH;
case RIGHT_SHIFT_EQUAL:
return Token.ASSIGN_RSH;
case UNSIGNED_RIGHT_SHIFT_EQUAL:
return Token.ASSIGN_URSH;
case PLUS_EQUAL:
return Token.ASSIGN_ADD;
case MINUS_EQUAL:
return Token.ASSIGN_SUB;
case STAR_EQUAL:
return Token.ASSIGN_MUL;
case STAR_STAR_EQUAL:
return Token.ASSIGN_EXPONENT;
case SLASH_EQUAL:
return Token.ASSIGN_DIV;
case PERCENT_EQUAL:
return Token.ASSIGN_MOD;
case OR:
return Token.OR;
case AND:
return Token.AND;
default:
throw new IllegalStateException(String.valueOf(token));
}
}
// Simple helper to create nodes and set the initial node properties.
Node newNode(Token type) {
return new Node(type).clonePropsFrom(templateNode);
}
Node newNode(Token type, Node child1) {
return new Node(type, child1).clonePropsFrom(templateNode);
}
Node newNode(Token type, Node child1, Node child2) {
return new Node(type, child1, child2).clonePropsFrom(templateNode);
}
Node newNode(Token type, Node child1, Node child2, Node child3) {
return new Node(type, child1, child2, child3).clonePropsFrom(templateNode);
}
Node newStringNode(String value) {
return IR.string(value).clonePropsFrom(templateNode);
}
Node newStringNode(Token type, String value) {
return Node.newString(type, value).clonePropsFrom(templateNode);
}
Node newNumberNode(Double value) {
return IR.number(value).clonePropsFrom(templateNode);
}
/**
* Clone the properties from the template node recursively, skips nodes that
* have properties already.
*/
Node cloneProps(Node n) {
if (!n.hasProps()) {
n.clonePropsFrom(templateNode);
}
for (Node child : n.children()) {
cloneProps(child);
}
return n;
}
}