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Copy pathparser.ts
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5981 lines (5264 loc) · 287 KB
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/// <reference path="types.ts"/>
/// <reference path="core.ts"/>
/// <reference path="scanner.ts"/>
module ts {
var nodeConstructors = new Array<new () => Node>(SyntaxKind.Count);
export function getFullWidth(node: Node) {
return node.end - node.pos;
}
function hasFlag(val: number, flag: number): boolean {
return (val & flag) !== 0;
}
// Returns true if this node contains a parse error anywhere underneath it.
export function containsParseError(node: Node): boolean {
if (!hasFlag(node.parserContextFlags, ParserContextFlags.HasPropagatedChildContainsErrorFlag)) {
// A node is considered to contain a parse error if:
// a) the parser explicitly marked that it had an error
// b) any of it's children reported that it had an error.
var val = hasFlag(node.parserContextFlags, ParserContextFlags.ContainsError) ||
forEachChild(node, containsParseError);
// If so, mark ourselves accordingly.
if (val) {
node.parserContextFlags |= ParserContextFlags.ContainsError;
}
// Also mark that we've propogated the child information to this node. This way we can
// always consult the bit directly on this node without needing to check its children
// again.
node.parserContextFlags |= ParserContextFlags.HasPropagatedChildContainsErrorFlag;
}
return hasFlag(node.parserContextFlags, ParserContextFlags.ContainsError);
}
export function getNodeConstructor(kind: SyntaxKind): new () => Node {
return nodeConstructors[kind] || (nodeConstructors[kind] = objectAllocator.getNodeConstructor(kind));
}
function createRootNode(kind: SyntaxKind, pos: number, end: number, flags: NodeFlags): Node {
var node = new (getNodeConstructor(kind))();
node.pos = pos;
node.end = end;
node.flags = flags;
return node;
}
interface ReferenceComments {
referencedFiles: FileReference[];
amdDependencies: string[];
amdModuleName: string;
}
export function getSourceFileOfNode(node: Node): SourceFile {
while (node && node.kind !== SyntaxKind.SourceFile) node = node.parent;
return <SourceFile>node;
}
// This is a useful function for debugging purposes.
export function nodePosToString(node: Node): string {
var file = getSourceFileOfNode(node);
var loc = file.getLineAndCharacterFromPosition(node.pos);
return file.filename + "(" + loc.line + "," + loc.character + ")";
}
export function getStartPosOfNode(node: Node): number {
return node.pos;
}
export function isMissingNode(node: Node) {
return node.pos === node.end && node.kind !== SyntaxKind.EndOfFileToken;
}
export function getTokenPosOfNode(node: Node, sourceFile?: SourceFile): number {
// With nodes that have no width (i.e. 'Missing' nodes), we actually *don't*
// want to skip trivia because this will launch us forward to the next token.
if (isMissingNode(node)) {
return node.pos;
}
return skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.pos);
}
export function getSourceTextOfNodeFromSourceFile(sourceFile: SourceFile, node: Node): string {
if (isMissingNode(node)) {
return "";
}
var text = sourceFile.text;
return text.substring(skipTrivia(text, node.pos), node.end);
}
export function getTextOfNodeFromSourceText(sourceText: string, node: Node): string {
if (isMissingNode(node)) {
return "";
}
return sourceText.substring(skipTrivia(sourceText, node.pos), node.end);
}
export function getTextOfNode(node: Node): string {
return getSourceTextOfNodeFromSourceFile(getSourceFileOfNode(node), node);
}
// Add an extra underscore to identifiers that start with two underscores to avoid issues with magic names like '__proto__'
export function escapeIdentifier(identifier: string): string {
return identifier.length >= 2 && identifier.charCodeAt(0) === CharacterCodes._ && identifier.charCodeAt(1) === CharacterCodes._ ? "_" + identifier : identifier;
}
// Remove extra underscore from escaped identifier
export function unescapeIdentifier(identifier: string): string {
return identifier.length >= 3 && identifier.charCodeAt(0) === CharacterCodes._ && identifier.charCodeAt(1) === CharacterCodes._ && identifier.charCodeAt(2) === CharacterCodes._ ? identifier.substr(1) : identifier;
}
// Return display name of an identifier
// Computed property names will just be emitted as "[<expr>]", where <expr> is the source
// text of the expression in the computed property.
export function declarationNameToString(name: DeclarationName) {
return getFullWidth(name) === 0 ? "(Missing)" : getTextOfNode(name);
}
export function createDiagnosticForNode(node: Node, message: DiagnosticMessage, arg0?: any, arg1?: any, arg2?: any): Diagnostic {
node = getErrorSpanForNode(node);
var file = getSourceFileOfNode(node);
var start = getFullWidth(node) === 0 ? node.pos : skipTrivia(file.text, node.pos);
var length = node.end - start;
return createFileDiagnostic(file, start, length, message, arg0, arg1, arg2);
}
export function createDiagnosticForNodeFromMessageChain(node: Node, messageChain: DiagnosticMessageChain, newLine: string): Diagnostic {
node = getErrorSpanForNode(node);
var file = getSourceFileOfNode(node);
var start = skipTrivia(file.text, node.pos);
var length = node.end - start;
return flattenDiagnosticChain(file, start, length, messageChain, newLine);
}
export function getErrorSpanForNode(node: Node): Node {
var errorSpan: Node;
switch (node.kind) {
// This list is a work in progress. Add missing node kinds to improve their error
// spans.
case SyntaxKind.VariableDeclaration:
case SyntaxKind.ClassDeclaration:
case SyntaxKind.InterfaceDeclaration:
case SyntaxKind.ModuleDeclaration:
case SyntaxKind.EnumDeclaration:
case SyntaxKind.EnumMember:
errorSpan = (<Declaration>node).name;
break;
}
// We now have the ideal error span, but it may be a node that is optional and absent
// (e.g. the name of a function expression), in which case errorSpan will be undefined.
// Alternatively, it might be required and missing (e.g. the name of a module), in which
// case its pos will equal its end (length 0). In either of these cases, we should fall
// back to the original node that the error was issued on.
return errorSpan && errorSpan.pos < errorSpan.end ? errorSpan : node;
}
export function isExternalModule(file: SourceFile): boolean {
return file.externalModuleIndicator !== undefined;
}
export function isDeclarationFile(file: SourceFile): boolean {
return (file.flags & NodeFlags.DeclarationFile) !== 0;
}
export function isConstEnumDeclaration(node: Node): boolean {
return node.kind === SyntaxKind.EnumDeclaration && isConst(node);
}
export function isConst(node: Node): boolean {
return !!(node.flags & NodeFlags.Const);
}
export function isLet(node: Node): boolean {
return !!(node.flags & NodeFlags.Let);
}
export function isPrologueDirective(node: Node): boolean {
return node.kind === SyntaxKind.ExpressionStatement && (<ExpressionStatement>node).expression.kind === SyntaxKind.StringLiteral;
}
function isEvalOrArgumentsIdentifier(node: Node): boolean {
return node.kind === SyntaxKind.Identifier &&
(<Identifier>node).text &&
((<Identifier>node).text === "eval" || (<Identifier>node).text === "arguments");
}
/// Should be called only on prologue directives (isPrologueDirective(node) should be true)
function isUseStrictPrologueDirective(node: Node): boolean {
Debug.assert(isPrologueDirective(node));
return (<Identifier>(<ExpressionStatement>node).expression).text === "use strict";
}
export function getLeadingCommentRangesOfNode(node: Node, sourceFileOfNode?: SourceFile) {
sourceFileOfNode = sourceFileOfNode || getSourceFileOfNode(node);
// If parameter/type parameter, the prev token trailing comments are part of this node too
if (node.kind === SyntaxKind.Parameter || node.kind === SyntaxKind.TypeParameter) {
// e.g. (/** blah */ a, /** blah */ b);
return concatenate(getTrailingCommentRanges(sourceFileOfNode.text, node.pos),
// e.g.: (
// /** blah */ a,
// /** blah */ b);
getLeadingCommentRanges(sourceFileOfNode.text, node.pos));
}
else {
return getLeadingCommentRanges(sourceFileOfNode.text, node.pos);
}
}
export function getJsDocComments(node: Node, sourceFileOfNode: SourceFile) {
return filter(getLeadingCommentRangesOfNode(node, sourceFileOfNode), isJsDocComment);
function isJsDocComment(comment: CommentRange) {
// True if the comment starts with '/**' but not if it is '/**/'
return sourceFileOfNode.text.charCodeAt(comment.pos + 1) === CharacterCodes.asterisk &&
sourceFileOfNode.text.charCodeAt(comment.pos + 2) === CharacterCodes.asterisk &&
sourceFileOfNode.text.charCodeAt(comment.pos + 3) !== CharacterCodes.slash;
}
}
export var fullTripleSlashReferencePathRegEx = /^(\/\/\/\s*<reference\s+path\s*=\s*)('|")(.+?)\2.*?\/>/
// Invokes a callback for each child of the given node. The 'cbNode' callback is invoked for all child nodes
// stored in properties. If a 'cbNodes' callback is specified, it is invoked for embedded arrays; otherwise,
// embedded arrays are flattened and the 'cbNode' callback is invoked for each element. If a callback returns
// a truthy value, iteration stops and that value is returned. Otherwise, undefined is returned.
export function forEachChild<T>(node: Node, cbNode: (node: Node) => T, cbNodes?: (nodes: Node[]) => T): T {
function child(node: Node): T {
if (node) {
return cbNode(node);
}
}
function children(nodes: Node[]) {
if (nodes) {
if (cbNodes) {
return cbNodes(nodes);
}
for (var i = 0, len = nodes.length; i < len; i++) {
var result = cbNode(nodes[i])
if (result) {
return result;
}
}
return undefined;
}
}
if (!node) {
return;
}
switch (node.kind) {
case SyntaxKind.QualifiedName:
return child((<QualifiedName>node).left) ||
child((<QualifiedName>node).right);
case SyntaxKind.TypeParameter:
return child((<TypeParameterDeclaration>node).name) ||
child((<TypeParameterDeclaration>node).constraint);
case SyntaxKind.Parameter:
return children(node.modifiers) ||
child((<ParameterDeclaration>node).dotDotDotToken) ||
child((<ParameterDeclaration>node).name) ||
child((<ParameterDeclaration>node).questionToken) ||
child((<ParameterDeclaration>node).type) ||
child((<ParameterDeclaration>node).initializer);
case SyntaxKind.Property:
case SyntaxKind.PropertyAssignment:
case SyntaxKind.ShorthandPropertyAssignment:
return children(node.modifiers) ||
child((<PropertyDeclaration>node).name) ||
child((<PropertyDeclaration>node).questionToken) ||
child((<PropertyDeclaration>node).type) ||
child((<PropertyDeclaration>node).initializer);
case SyntaxKind.FunctionType:
case SyntaxKind.ConstructorType:
case SyntaxKind.CallSignature:
case SyntaxKind.ConstructSignature:
case SyntaxKind.IndexSignature:
return children(node.modifiers) ||
children((<SignatureDeclaration>node).typeParameters) ||
children((<SignatureDeclaration>node).parameters) ||
child((<SignatureDeclaration>node).type);
case SyntaxKind.Method:
case SyntaxKind.Constructor:
case SyntaxKind.GetAccessor:
case SyntaxKind.SetAccessor:
case SyntaxKind.FunctionExpression:
case SyntaxKind.FunctionDeclaration:
case SyntaxKind.ArrowFunction:
return children(node.modifiers) ||
child((<FunctionLikeDeclaration>node).name) ||
child((<FunctionLikeDeclaration>node).questionToken) ||
children((<FunctionLikeDeclaration>node).typeParameters) ||
children((<FunctionLikeDeclaration>node).parameters) ||
child((<FunctionLikeDeclaration>node).type) ||
child((<FunctionLikeDeclaration>node).body);
case SyntaxKind.TypeReference:
return child((<TypeReferenceNode>node).typeName) ||
children((<TypeReferenceNode>node).typeArguments);
case SyntaxKind.TypeQuery:
return child((<TypeQueryNode>node).exprName);
case SyntaxKind.TypeLiteral:
return children((<TypeLiteralNode>node).members);
case SyntaxKind.ArrayType:
return child((<ArrayTypeNode>node).elementType);
case SyntaxKind.TupleType:
return children((<TupleTypeNode>node).elementTypes);
case SyntaxKind.UnionType:
return children((<UnionTypeNode>node).types);
case SyntaxKind.ParenthesizedType:
return child((<ParenthesizedTypeNode>node).type);
case SyntaxKind.ArrayLiteralExpression:
return children((<ArrayLiteralExpression>node).elements);
case SyntaxKind.ObjectLiteralExpression:
return children((<ObjectLiteralExpression>node).properties);
case SyntaxKind.PropertyAccessExpression:
return child((<PropertyAccessExpression>node).expression) ||
child((<PropertyAccessExpression>node).name);
case SyntaxKind.ElementAccessExpression:
return child((<ElementAccessExpression>node).expression) ||
child((<ElementAccessExpression>node).argumentExpression);
case SyntaxKind.CallExpression:
case SyntaxKind.NewExpression:
return child((<CallExpression>node).expression) ||
children((<CallExpression>node).typeArguments) ||
children((<CallExpression>node).arguments);
case SyntaxKind.TaggedTemplateExpression:
return child((<TaggedTemplateExpression>node).tag) ||
child((<TaggedTemplateExpression>node).template);
case SyntaxKind.TypeAssertionExpression:
return child((<TypeAssertion>node).type) ||
child((<TypeAssertion>node).expression);
case SyntaxKind.ParenthesizedExpression:
return child((<ParenthesizedExpression>node).expression);
case SyntaxKind.DeleteExpression:
return child((<DeleteExpression>node).expression);
case SyntaxKind.TypeOfExpression:
return child((<TypeOfExpression>node).expression);
case SyntaxKind.VoidExpression:
return child((<VoidExpression>node).expression);
case SyntaxKind.PrefixUnaryExpression:
return child((<PrefixUnaryExpression>node).operand);
case SyntaxKind.PostfixUnaryExpression:
return child((<PostfixUnaryExpression>node).operand);
case SyntaxKind.BinaryExpression:
return child((<BinaryExpression>node).left) ||
child((<BinaryExpression>node).right);
case SyntaxKind.ConditionalExpression:
return child((<ConditionalExpression>node).condition) ||
child((<ConditionalExpression>node).whenTrue) ||
child((<ConditionalExpression>node).whenFalse);
case SyntaxKind.Block:
case SyntaxKind.TryBlock:
case SyntaxKind.FinallyBlock:
case SyntaxKind.ModuleBlock:
return children((<Block>node).statements);
case SyntaxKind.SourceFile:
return children((<SourceFile>node).statements) ||
child((<SourceFile>node).endOfFileToken);
case SyntaxKind.VariableStatement:
return children(node.modifiers) ||
children((<VariableStatement>node).declarations);
case SyntaxKind.ExpressionStatement:
return child((<ExpressionStatement>node).expression);
case SyntaxKind.IfStatement:
return child((<IfStatement>node).expression) ||
child((<IfStatement>node).thenStatement) ||
child((<IfStatement>node).elseStatement);
case SyntaxKind.DoStatement:
return child((<DoStatement>node).statement) ||
child((<DoStatement>node).expression);
case SyntaxKind.WhileStatement:
return child((<WhileStatement>node).expression) ||
child((<WhileStatement>node).statement);
case SyntaxKind.ForStatement:
return children((<ForStatement>node).declarations) ||
child((<ForStatement>node).initializer) ||
child((<ForStatement>node).condition) ||
child((<ForStatement>node).iterator) ||
child((<ForStatement>node).statement);
case SyntaxKind.ForInStatement:
return children((<ForInStatement>node).declarations) ||
child((<ForInStatement>node).variable) ||
child((<ForInStatement>node).expression) ||
child((<ForInStatement>node).statement);
case SyntaxKind.ContinueStatement:
case SyntaxKind.BreakStatement:
return child((<BreakOrContinueStatement>node).label);
case SyntaxKind.ReturnStatement:
return child((<ReturnStatement>node).expression);
case SyntaxKind.WithStatement:
return child((<WithStatement>node).expression) ||
child((<WithStatement>node).statement);
case SyntaxKind.SwitchStatement:
return child((<SwitchStatement>node).expression) ||
children((<SwitchStatement>node).clauses);
case SyntaxKind.CaseClause:
return child((<CaseClause>node).expression) ||
children((<CaseClause>node).statements);
case SyntaxKind.DefaultClause:
return children((<DefaultClause>node).statements);
case SyntaxKind.LabeledStatement:
return child((<LabeledStatement>node).label) ||
child((<LabeledStatement>node).statement);
case SyntaxKind.ThrowStatement:
return child((<ThrowStatement>node).expression);
case SyntaxKind.TryStatement:
return child((<TryStatement>node).tryBlock) ||
child((<TryStatement>node).catchClause) ||
child((<TryStatement>node).finallyBlock);
case SyntaxKind.CatchClause:
return child((<CatchClause>node).name) ||
child((<CatchClause>node).type) ||
child((<CatchClause>node).block);
case SyntaxKind.VariableDeclaration:
return children(node.modifiers) ||
child((<VariableDeclaration>node).name) ||
child((<VariableDeclaration>node).type) ||
child((<VariableDeclaration>node).initializer);
case SyntaxKind.ClassDeclaration:
return children(node.modifiers) ||
child((<ClassDeclaration>node).name) ||
children((<ClassDeclaration>node).typeParameters) ||
children((<ClassDeclaration>node).heritageClauses) ||
children((<ClassDeclaration>node).members);
case SyntaxKind.InterfaceDeclaration:
return children(node.modifiers) ||
child((<InterfaceDeclaration>node).name) ||
children((<InterfaceDeclaration>node).typeParameters) ||
children((<ClassDeclaration>node).heritageClauses) ||
children((<InterfaceDeclaration>node).members);
case SyntaxKind.TypeAliasDeclaration:
return children(node.modifiers) ||
child((<TypeAliasDeclaration>node).name) ||
child((<TypeAliasDeclaration>node).type);
case SyntaxKind.EnumDeclaration:
return children(node.modifiers) ||
child((<EnumDeclaration>node).name) ||
children((<EnumDeclaration>node).members);
case SyntaxKind.EnumMember:
return child((<EnumMember>node).name) ||
child((<EnumMember>node).initializer);
case SyntaxKind.ModuleDeclaration:
return children(node.modifiers) ||
child((<ModuleDeclaration>node).name) ||
child((<ModuleDeclaration>node).body);
case SyntaxKind.ImportDeclaration:
return children(node.modifiers) ||
child((<ImportDeclaration>node).name) ||
child((<ImportDeclaration>node).moduleReference);
case SyntaxKind.ExportAssignment:
return children(node.modifiers) ||
child((<ExportAssignment>node).exportName);
case SyntaxKind.TemplateExpression:
return child((<TemplateExpression>node).head) || children((<TemplateExpression>node).templateSpans);
case SyntaxKind.TemplateSpan:
return child((<TemplateSpan>node).expression) || child((<TemplateSpan>node).literal);
case SyntaxKind.ComputedPropertyName:
return child((<ComputedPropertyName>node).expression);
case SyntaxKind.HeritageClause:
return children((<HeritageClause>node).types);
case SyntaxKind.ExternalModuleReference:
return child((<ExternalModuleReference>node).expression);
}
}
// Warning: This has the same semantics as the forEach family of functions,
// in that traversal terminates in the event that 'visitor' supplies a truthy value.
export function forEachReturnStatement<T>(body: Block, visitor: (stmt: ReturnStatement) => T): T {
return traverse(body);
function traverse(node: Node): T {
switch (node.kind) {
case SyntaxKind.ReturnStatement:
return visitor(<ReturnStatement>node);
case SyntaxKind.Block:
case SyntaxKind.IfStatement:
case SyntaxKind.DoStatement:
case SyntaxKind.WhileStatement:
case SyntaxKind.ForStatement:
case SyntaxKind.ForInStatement:
case SyntaxKind.WithStatement:
case SyntaxKind.SwitchStatement:
case SyntaxKind.CaseClause:
case SyntaxKind.DefaultClause:
case SyntaxKind.LabeledStatement:
case SyntaxKind.TryStatement:
case SyntaxKind.TryBlock:
case SyntaxKind.CatchClause:
case SyntaxKind.FinallyBlock:
return forEachChild(node, traverse);
}
}
}
export function isAnyFunction(node: Node): boolean {
if (node) {
switch (node.kind) {
case SyntaxKind.FunctionExpression:
case SyntaxKind.FunctionDeclaration:
case SyntaxKind.ArrowFunction:
case SyntaxKind.Method:
case SyntaxKind.GetAccessor:
case SyntaxKind.SetAccessor:
case SyntaxKind.Constructor:
return true;
}
}
return false;
}
export function isFunctionBlock(node: Node) {
return node !== undefined && node.kind === SyntaxKind.Block && isAnyFunction(node.parent);
}
export function isObjectLiteralMethod(node: Node) {
return node !== undefined && node.kind === SyntaxKind.Method && node.parent.kind === SyntaxKind.ObjectLiteralExpression;
}
export function getContainingFunction(node: Node): FunctionLikeDeclaration {
while (true) {
node = node.parent;
if (!node || isAnyFunction(node)) {
return <FunctionLikeDeclaration>node;
}
}
}
export function getThisContainer(node: Node, includeArrowFunctions: boolean): Node {
while (true) {
node = node.parent;
if (!node) {
return undefined;
}
switch (node.kind) {
case SyntaxKind.ArrowFunction:
if (!includeArrowFunctions) {
continue;
}
// Fall through
case SyntaxKind.FunctionDeclaration:
case SyntaxKind.FunctionExpression:
case SyntaxKind.ModuleDeclaration:
case SyntaxKind.Property:
case SyntaxKind.Method:
case SyntaxKind.Constructor:
case SyntaxKind.GetAccessor:
case SyntaxKind.SetAccessor:
case SyntaxKind.EnumDeclaration:
case SyntaxKind.SourceFile:
return node;
}
}
}
export function getSuperContainer(node: Node): Node {
while (true) {
node = node.parent;
if (!node) {
return undefined;
}
switch (node.kind) {
case SyntaxKind.Property:
case SyntaxKind.Method:
case SyntaxKind.Constructor:
case SyntaxKind.GetAccessor:
case SyntaxKind.SetAccessor:
return node;
}
}
}
export function getInvokedExpression(node: CallLikeExpression): Expression {
if (node.kind === SyntaxKind.TaggedTemplateExpression) {
return (<TaggedTemplateExpression>node).tag;
}
// Will either be a CallExpression or NewExpression.
return (<CallExpression>node).expression;
}
export function isExpression(node: Node): boolean {
switch (node.kind) {
case SyntaxKind.ThisKeyword:
case SyntaxKind.SuperKeyword:
case SyntaxKind.NullKeyword:
case SyntaxKind.TrueKeyword:
case SyntaxKind.FalseKeyword:
case SyntaxKind.RegularExpressionLiteral:
case SyntaxKind.ArrayLiteralExpression:
case SyntaxKind.ObjectLiteralExpression:
case SyntaxKind.PropertyAccessExpression:
case SyntaxKind.ElementAccessExpression:
case SyntaxKind.CallExpression:
case SyntaxKind.NewExpression:
case SyntaxKind.TaggedTemplateExpression:
case SyntaxKind.TypeAssertionExpression:
case SyntaxKind.ParenthesizedExpression:
case SyntaxKind.FunctionExpression:
case SyntaxKind.ArrowFunction:
case SyntaxKind.VoidExpression:
case SyntaxKind.DeleteExpression:
case SyntaxKind.TypeOfExpression:
case SyntaxKind.PrefixUnaryExpression:
case SyntaxKind.PostfixUnaryExpression:
case SyntaxKind.BinaryExpression:
case SyntaxKind.ConditionalExpression:
case SyntaxKind.TemplateExpression:
case SyntaxKind.NoSubstitutionTemplateLiteral:
case SyntaxKind.OmittedExpression:
return true;
case SyntaxKind.QualifiedName:
while (node.parent.kind === SyntaxKind.QualifiedName) {
node = node.parent;
}
return node.parent.kind === SyntaxKind.TypeQuery;
case SyntaxKind.Identifier:
if (node.parent.kind === SyntaxKind.TypeQuery) {
return true;
}
// fall through
case SyntaxKind.NumericLiteral:
case SyntaxKind.StringLiteral:
var parent = node.parent;
switch (parent.kind) {
case SyntaxKind.VariableDeclaration:
case SyntaxKind.Parameter:
case SyntaxKind.Property:
case SyntaxKind.EnumMember:
case SyntaxKind.PropertyAssignment:
return (<VariableDeclaration>parent).initializer === node;
case SyntaxKind.ExpressionStatement:
case SyntaxKind.IfStatement:
case SyntaxKind.DoStatement:
case SyntaxKind.WhileStatement:
case SyntaxKind.ReturnStatement:
case SyntaxKind.WithStatement:
case SyntaxKind.SwitchStatement:
case SyntaxKind.CaseClause:
case SyntaxKind.ThrowStatement:
case SyntaxKind.SwitchStatement:
return (<ExpressionStatement>parent).expression === node;
case SyntaxKind.ForStatement:
return (<ForStatement>parent).initializer === node ||
(<ForStatement>parent).condition === node ||
(<ForStatement>parent).iterator === node;
case SyntaxKind.ForInStatement:
return (<ForInStatement>parent).variable === node ||
(<ForInStatement>parent).expression === node;
case SyntaxKind.TypeAssertionExpression:
return node === (<TypeAssertion>parent).expression;
case SyntaxKind.TemplateSpan:
return node === (<TemplateSpan>parent).expression;
default:
if (isExpression(parent)) {
return true;
}
}
}
return false;
}
export function isExternalModuleImportDeclaration(node: Node) {
return node.kind === SyntaxKind.ImportDeclaration && (<ImportDeclaration>node).moduleReference.kind === SyntaxKind.ExternalModuleReference;
}
export function getExternalModuleImportDeclarationExpression(node: Node) {
Debug.assert(isExternalModuleImportDeclaration(node));
return (<ExternalModuleReference>(<ImportDeclaration>node).moduleReference).expression;
}
export function isInternalModuleImportDeclaration(node: Node) {
return node.kind === SyntaxKind.ImportDeclaration && (<ImportDeclaration>node).moduleReference.kind !== SyntaxKind.ExternalModuleReference;
}
export function hasDotDotDotToken(node: Node) {
return node && node.kind === SyntaxKind.Parameter && (<ParameterDeclaration>node).dotDotDotToken !== undefined;
}
export function hasQuestionToken(node: Node) {
if (node) {
switch (node.kind) {
case SyntaxKind.Parameter:
return (<ParameterDeclaration>node).questionToken !== undefined;
case SyntaxKind.Method:
return (<MethodDeclaration>node).questionToken !== undefined;
case SyntaxKind.ShorthandPropertyAssignment:
case SyntaxKind.PropertyAssignment:
case SyntaxKind.Property:
return (<PropertyDeclaration>node).questionToken !== undefined;
}
}
return false;
}
export function hasRestParameters(s: SignatureDeclaration): boolean {
return s.parameters.length > 0 && s.parameters[s.parameters.length - 1].dotDotDotToken !== undefined;
}
export function isLiteralKind(kind: SyntaxKind): boolean {
return SyntaxKind.FirstLiteralToken <= kind && kind <= SyntaxKind.LastLiteralToken;
}
export function isTextualLiteralKind(kind: SyntaxKind): boolean {
return kind === SyntaxKind.StringLiteral || kind === SyntaxKind.NoSubstitutionTemplateLiteral;
}
export function isTemplateLiteralKind(kind: SyntaxKind): boolean {
return SyntaxKind.FirstTemplateToken <= kind && kind <= SyntaxKind.LastTemplateToken;
}
export function isInAmbientContext(node: Node): boolean {
while (node) {
if (node.flags & (NodeFlags.Ambient | NodeFlags.DeclarationFile)) return true;
node = node.parent;
}
return false;
}
export function isDeclaration(node: Node): boolean {
switch (node.kind) {
case SyntaxKind.TypeParameter:
case SyntaxKind.Parameter:
case SyntaxKind.VariableDeclaration:
case SyntaxKind.Property:
case SyntaxKind.PropertyAssignment:
case SyntaxKind.ShorthandPropertyAssignment:
case SyntaxKind.EnumMember:
case SyntaxKind.Method:
case SyntaxKind.FunctionDeclaration:
case SyntaxKind.GetAccessor:
case SyntaxKind.SetAccessor:
case SyntaxKind.Constructor:
case SyntaxKind.ClassDeclaration:
case SyntaxKind.InterfaceDeclaration:
case SyntaxKind.TypeAliasDeclaration:
case SyntaxKind.EnumDeclaration:
case SyntaxKind.ModuleDeclaration:
case SyntaxKind.ImportDeclaration:
return true;
}
return false;
}
export function isStatement(n: Node): boolean {
switch(n.kind) {
case SyntaxKind.BreakStatement:
case SyntaxKind.ContinueStatement:
case SyntaxKind.DebuggerStatement:
case SyntaxKind.DoStatement:
case SyntaxKind.ExpressionStatement:
case SyntaxKind.EmptyStatement:
case SyntaxKind.ForInStatement:
case SyntaxKind.ForStatement:
case SyntaxKind.IfStatement:
case SyntaxKind.LabeledStatement:
case SyntaxKind.ReturnStatement:
case SyntaxKind.SwitchStatement:
case SyntaxKind.ThrowKeyword:
case SyntaxKind.TryStatement:
case SyntaxKind.VariableStatement:
case SyntaxKind.WhileStatement:
case SyntaxKind.WithStatement:
case SyntaxKind.ExportAssignment:
return true;
default:
return false;
}
}
// True if the given identifier, string literal, or number literal is the name of a declaration node
export function isDeclarationOrFunctionExpressionOrCatchVariableName(name: Node): boolean {
if (name.kind !== SyntaxKind.Identifier && name.kind !== SyntaxKind.StringLiteral && name.kind !== SyntaxKind.NumericLiteral) {
return false;
}
var parent = name.parent;
if (isDeclaration(parent) || parent.kind === SyntaxKind.FunctionExpression) {
return (<Declaration>parent).name === name;
}
if (parent.kind === SyntaxKind.CatchClause) {
return (<CatchClause>parent).name === name;
}
return false;
}
export function getClassBaseTypeNode(node: ClassDeclaration) {
var heritageClause = getHeritageClause(node.heritageClauses, SyntaxKind.ExtendsKeyword);
return heritageClause && heritageClause.types.length > 0 ? heritageClause.types[0] : undefined;
}
export function getClassImplementedTypeNodes(node: ClassDeclaration) {
var heritageClause = getHeritageClause(node.heritageClauses, SyntaxKind.ImplementsKeyword);
return heritageClause ? heritageClause.types : undefined;
}
export function getInterfaceBaseTypeNodes(node: InterfaceDeclaration) {
var heritageClause = getHeritageClause(node.heritageClauses, SyntaxKind.ExtendsKeyword);
return heritageClause ? heritageClause.types : undefined;
}
export function getHeritageClause(clauses: NodeArray<HeritageClause>, kind: SyntaxKind) {
if (clauses) {
for (var i = 0, n = clauses.length; i < n; i++) {
if (clauses[i].token === kind) {
return clauses[i];
}
}
}
return undefined;
}
export function tryResolveScriptReference(program: Program, sourceFile: SourceFile, reference: FileReference) {
if (!program.getCompilerOptions().noResolve) {
var referenceFileName = isRootedDiskPath(reference.filename) ? reference.filename : combinePaths(getDirectoryPath(sourceFile.filename), reference.filename);
referenceFileName = getNormalizedAbsolutePath(referenceFileName, program.getCompilerHost().getCurrentDirectory());
return program.getSourceFile(referenceFileName);
}
}
export function getAncestor(node: Node, kind: SyntaxKind): Node {
switch (kind) {
// special-cases that can be come first
case SyntaxKind.ClassDeclaration:
while (node) {
switch (node.kind) {
case SyntaxKind.ClassDeclaration:
return <ClassDeclaration>node;
case SyntaxKind.EnumDeclaration:
case SyntaxKind.InterfaceDeclaration:
case SyntaxKind.TypeAliasDeclaration:
case SyntaxKind.ModuleDeclaration:
case SyntaxKind.ImportDeclaration:
// early exit cases - declarations cannot be nested in classes
return undefined;
default:
node = node.parent;
continue;
}
}
break;
default:
while (node) {
if (node.kind === kind) {
return node;
}
node = node.parent;
}
break;
}
return undefined;
}
const enum ParsingContext {
SourceElements, // Elements in source file
ModuleElements, // Elements in module declaration
BlockStatements, // Statements in block
SwitchClauses, // Clauses in switch statement
SwitchClauseStatements, // Statements in switch clause
TypeMembers, // Members in interface or type literal
ClassMembers, // Members in class declaration
EnumMembers, // Members in enum declaration
TypeReferences, // Type references in extends or implements clause
VariableDeclarations, // Variable declarations in variable statement
ArgumentExpressions, // Expressions in argument list
ObjectLiteralMembers, // Members in object literal
ArrayLiteralMembers, // Members in array literal
Parameters, // Parameters in parameter list
TypeParameters, // Type parameters in type parameter list
TypeArguments, // Type arguments in type argument list
TupleElementTypes, // Element types in tuple element type list
HeritageClauses, // Heritage clauses for a class or interface declaration.
Count // Number of parsing contexts
}
const enum Tristate {
False,
True,
Unknown
}
function parsingContextErrors(context: ParsingContext): DiagnosticMessage {
switch (context) {
case ParsingContext.SourceElements: return Diagnostics.Declaration_or_statement_expected;
case ParsingContext.ModuleElements: return Diagnostics.Declaration_or_statement_expected;
case ParsingContext.BlockStatements: return Diagnostics.Statement_expected;
case ParsingContext.SwitchClauses: return Diagnostics.case_or_default_expected;
case ParsingContext.SwitchClauseStatements: return Diagnostics.Statement_expected;
case ParsingContext.TypeMembers: return Diagnostics.Property_or_signature_expected;
case ParsingContext.ClassMembers: return Diagnostics.Unexpected_token_A_constructor_method_accessor_or_property_was_expected;
case ParsingContext.EnumMembers: return Diagnostics.Enum_member_expected;
case ParsingContext.TypeReferences: return Diagnostics.Type_reference_expected;
case ParsingContext.VariableDeclarations: return Diagnostics.Variable_declaration_expected;
case ParsingContext.ArgumentExpressions: return Diagnostics.Argument_expression_expected;
case ParsingContext.ObjectLiteralMembers: return Diagnostics.Property_assignment_expected;
case ParsingContext.ArrayLiteralMembers: return Diagnostics.Expression_or_comma_expected;
case ParsingContext.Parameters: return Diagnostics.Parameter_declaration_expected;
case ParsingContext.TypeParameters: return Diagnostics.Type_parameter_declaration_expected;
case ParsingContext.TypeArguments: return Diagnostics.Type_argument_expected;
case ParsingContext.TupleElementTypes: return Diagnostics.Type_expected;
case ParsingContext.HeritageClauses: return Diagnostics.Unexpected_token_expected;
}
};
export interface ReferencePathMatchResult {
fileReference?: FileReference
diagnosticMessage?: DiagnosticMessage
isNoDefaultLib?: boolean
}
export function getFileReferenceFromReferencePath(comment: string, commentRange: CommentRange): ReferencePathMatchResult {
var simpleReferenceRegEx = /^\/\/\/\s*<reference\s+/gim;
var isNoDefaultLibRegEx = /^(\/\/\/\s*<reference\s+no-default-lib\s*=\s*)('|")(.+?)\2\s*\/>/gim;
if (simpleReferenceRegEx.exec(comment)) {
if (isNoDefaultLibRegEx.exec(comment)) {
return {
isNoDefaultLib: true
}
}
else {
var matchResult = fullTripleSlashReferencePathRegEx.exec(comment);
if (matchResult) {
var start = commentRange.pos;
var end = commentRange.end;
return {
fileReference: {
pos: start,
end: end,
filename: matchResult[3]
},
isNoDefaultLib: false
};
}
else {
return {
diagnosticMessage: Diagnostics.Invalid_reference_directive_syntax,
isNoDefaultLib: false
};
}
}
}
return undefined;
}
export function isKeyword(token: SyntaxKind): boolean {
return SyntaxKind.FirstKeyword <= token && token <= SyntaxKind.LastKeyword;
}
export function isTrivia(token: SyntaxKind) {
return SyntaxKind.FirstTriviaToken <= token && token <= SyntaxKind.LastTriviaToken;
}
export function isModifier(token: SyntaxKind): boolean {
switch (token) {
case SyntaxKind.PublicKeyword:
case SyntaxKind.PrivateKeyword:
case SyntaxKind.ProtectedKeyword:
case SyntaxKind.StaticKeyword:
case SyntaxKind.ExportKeyword:
case SyntaxKind.DeclareKeyword:
case SyntaxKind.ConstKeyword:
return true;
}
return false;
}
function modifierToFlag(token: SyntaxKind): NodeFlags {
switch (token) {
case SyntaxKind.StaticKeyword: return NodeFlags.Static;
case SyntaxKind.PublicKeyword: return NodeFlags.Public;
case SyntaxKind.ProtectedKeyword: return NodeFlags.Protected;
case SyntaxKind.PrivateKeyword: return NodeFlags.Private;
case SyntaxKind.ExportKeyword: return NodeFlags.Export;
case SyntaxKind.DeclareKeyword: return NodeFlags.Ambient;
case SyntaxKind.ConstKeyword: return NodeFlags.Const;
}
return 0;
}
export function createSourceFile(filename: string, sourceText: string, languageVersion: ScriptTarget, version: string, isOpen: boolean = false): SourceFile {
var token: SyntaxKind;
var parsingContext: ParsingContext;
var identifiers: Map<string> = {};