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/// <reference path="comparison.ts" />
/// <reference path="paths.ts" />
/// <reference path="types.ts"/>
/// <reference path="performance.ts" />
namespace ts {
// WARNING: The script `configureNightly.ts` uses a regexp to parse out these values.
// If changing the text in this section, be sure to test `configureNightly` too.
export const versionMajorMinor = "2.7";
/** The version of the TypeScript compiler release */
export const version = `${versionMajorMinor}.0`;
}
/* @internal */
namespace ts {
/**
* Iterates through the parent chain of a node and performs the callback on each parent until the callback
* returns a truthy value, then returns that value.
* If no such value is found, it applies the callback until the parent pointer is undefined or the callback returns "quit"
* At that point findAncestor returns undefined.
*/
export function findAncestor<T extends Node>(node: Node, callback: (element: Node) => element is T): T | undefined;
export function findAncestor(node: Node, callback: (element: Node) => boolean | "quit"): Node | undefined;
export function findAncestor(node: Node, callback: (element: Node) => boolean | "quit"): Node {
while (node) {
const result = callback(node);
if (result === "quit") {
return undefined;
}
else if (result) {
return node;
}
node = node.parent;
}
return undefined;
}
export function createSymbolTable(symbols?: ReadonlyArray<Symbol>): SymbolTable {
const result = createMap<Symbol>() as SymbolTable;
if (symbols) {
for (const symbol of symbols) {
result.set(symbol.escapedName, symbol);
}
}
return result;
}
export function changesAffectModuleResolution(oldOptions: CompilerOptions, newOptions: CompilerOptions): boolean {
return !oldOptions ||
(oldOptions.module !== newOptions.module) ||
(oldOptions.moduleResolution !== newOptions.moduleResolution) ||
(oldOptions.noResolve !== newOptions.noResolve) ||
(oldOptions.target !== newOptions.target) ||
(oldOptions.noLib !== newOptions.noLib) ||
(oldOptions.jsx !== newOptions.jsx) ||
(oldOptions.allowJs !== newOptions.allowJs) ||
(oldOptions.rootDir !== newOptions.rootDir) ||
(oldOptions.configFilePath !== newOptions.configFilePath) ||
(oldOptions.baseUrl !== newOptions.baseUrl) ||
(oldOptions.maxNodeModuleJsDepth !== newOptions.maxNodeModuleJsDepth) ||
!arrayIsEqualTo(oldOptions.lib, newOptions.lib) ||
!arrayIsEqualTo(oldOptions.typeRoots, newOptions.typeRoots) ||
!arrayIsEqualTo(oldOptions.rootDirs, newOptions.rootDirs) ||
!equalOwnProperties(oldOptions.paths, newOptions.paths);
}
/**
* Tests whether a value is string
*/
export function isString(text: any): text is string {
return typeof text === "string";
}
export function tryCast<TOut extends TIn, TIn = any>(value: TIn | undefined, test: (value: TIn) => value is TOut): TOut | undefined {
return value !== undefined && test(value) ? value : undefined;
}
export function cast<TOut extends TIn, TIn = any>(value: TIn | undefined, test: (value: TIn) => value is TOut): TOut {
if (value !== undefined && test(value)) return value;
Debug.fail(`Invalid cast. The supplied value did not pass the test '${Debug.getFunctionName(test)}'.`);
}
/** Does nothing. */
export function noop(_?: {} | null | undefined): void { } // tslint:disable-line no-empty
/** Do nothing and return false */
export function returnFalse(): false { return false; }
/** Do nothing and return true */
export function returnTrue(): true { return true; }
/** Returns its argument. */
export function identity<T>(x: T) { return x; }
/** Throws an error because a function is not implemented. */
export function notImplemented(): never {
throw new Error("Not implemented");
}
export function memoize<T>(callback: () => T): () => T {
let value: T;
return () => {
if (callback) {
value = callback();
callback = undefined;
}
return value;
};
}
/**
* High-order function, creates a function that executes a function composition.
* For example, `chain(a, b)` is the equivalent of `x => ((a', b') => y => b'(a'(y)))(a(x), b(x))`
*
* @param args The functions to chain.
*/
export function chain<T, U>(...args: ((t: T) => (u: U) => U)[]): (t: T) => (u: U) => U;
export function chain<T, U>(a: (t: T) => (u: U) => U, b: (t: T) => (u: U) => U, c: (t: T) => (u: U) => U, d: (t: T) => (u: U) => U, e: (t: T) => (u: U) => U): (t: T) => (u: U) => U {
if (e) {
const args: ((t: T) => (u: U) => U)[] = [];
for (let i = 0; i < arguments.length; i++) {
args[i] = arguments[i];
}
return t => compose(...map(args, f => f(t)));
}
else if (d) {
return t => compose(a(t), b(t), c(t), d(t));
}
else if (c) {
return t => compose(a(t), b(t), c(t));
}
else if (b) {
return t => compose(a(t), b(t));
}
else if (a) {
return t => compose(a(t));
}
else {
return _ => u => u;
}
}
/**
* High-order function, composes functions. Note that functions are composed inside-out;
* for example, `compose(a, b)` is the equivalent of `x => b(a(x))`.
*
* @param args The functions to compose.
*/
export function compose<T>(...args: ((t: T) => T)[]): (t: T) => T;
export function compose<T>(a: (t: T) => T, b: (t: T) => T, c: (t: T) => T, d: (t: T) => T, e: (t: T) => T): (t: T) => T {
if (e) {
const args: ((t: T) => T)[] = [];
for (let i = 0; i < arguments.length; i++) {
args[i] = arguments[i];
}
return t => reduceLeft(args, (u, f) => f(u), t);
}
else if (d) {
return t => d(c(b(a(t))));
}
else if (c) {
return t => c(b(a(t)));
}
else if (b) {
return t => b(a(t));
}
else if (a) {
return t => a(t);
}
else {
return t => t;
}
}
export function formatStringFromArgs(text: string, args: { [index: number]: string; }, baseIndex?: number): string {
baseIndex = baseIndex || 0;
return text.replace(/{(\d+)}/g, (_match, index?) => args[+index + baseIndex]);
}
export let localizedDiagnosticMessages: MapLike<string> = undefined;
export function getLocaleSpecificMessage(message: DiagnosticMessage) {
return localizedDiagnosticMessages && localizedDiagnosticMessages[message.key] || message.message;
}
export function createFileDiagnostic(file: SourceFile, start: number, length: number, message: DiagnosticMessage, ...args: (string | number)[]): Diagnostic;
export function createFileDiagnostic(file: SourceFile, start: number, length: number, message: DiagnosticMessage): Diagnostic {
Debug.assertGreaterThanOrEqual(start, 0);
Debug.assertGreaterThanOrEqual(length, 0);
if (file) {
Debug.assertLessThanOrEqual(start, file.text.length);
Debug.assertLessThanOrEqual(start + length, file.text.length);
}
let text = getLocaleSpecificMessage(message);
if (arguments.length > 4) {
text = formatStringFromArgs(text, arguments, 4);
}
return {
file,
start,
length,
messageText: text,
category: message.category,
code: message.code,
};
}
/* internal */
export function formatMessage(_dummy: any, message: DiagnosticMessage): string {
let text = getLocaleSpecificMessage(message);
if (arguments.length > 2) {
text = formatStringFromArgs(text, arguments, 2);
}
return text;
}
export function createCompilerDiagnostic(message: DiagnosticMessage, ...args: (string | number)[]): Diagnostic;
export function createCompilerDiagnostic(message: DiagnosticMessage): Diagnostic {
let text = getLocaleSpecificMessage(message);
if (arguments.length > 1) {
text = formatStringFromArgs(text, arguments, 1);
}
return {
file: undefined,
start: undefined,
length: undefined,
messageText: text,
category: message.category,
code: message.code
};
}
export function createCompilerDiagnosticFromMessageChain(chain: DiagnosticMessageChain): Diagnostic {
return {
file: undefined,
start: undefined,
length: undefined,
code: chain.code,
category: chain.category,
messageText: chain.next ? chain : chain.messageText
};
}
export function chainDiagnosticMessages(details: DiagnosticMessageChain, message: DiagnosticMessage, ...args: string[]): DiagnosticMessageChain;
export function chainDiagnosticMessages(details: DiagnosticMessageChain, message: DiagnosticMessage): DiagnosticMessageChain {
let text = getLocaleSpecificMessage(message);
if (arguments.length > 2) {
text = formatStringFromArgs(text, arguments, 2);
}
return {
messageText: text,
category: message.category,
code: message.code,
next: details
};
}
export function concatenateDiagnosticMessageChains(headChain: DiagnosticMessageChain, tailChain: DiagnosticMessageChain): DiagnosticMessageChain {
let lastChain = headChain;
while (lastChain.next) {
lastChain = lastChain.next;
}
lastChain.next = tailChain;
return headChain;
}
function getDiagnosticFileName(diagnostic: Diagnostic): string {
return diagnostic.file ? diagnostic.file.fileName : undefined;
}
export function compareDiagnostics(d1: Diagnostic, d2: Diagnostic): Comparison {
return compareStringsCaseSensitive(getDiagnosticFileName(d1), getDiagnosticFileName(d2)) ||
compareValues(d1.start, d2.start) ||
compareValues(d1.length, d2.length) ||
compareValues(d1.code, d2.code) ||
compareMessageText(d1.messageText, d2.messageText) ||
Comparison.EqualTo;
}
function compareMessageText(text1: string | DiagnosticMessageChain, text2: string | DiagnosticMessageChain): Comparison {
while (text1 && text2) {
// We still have both chains.
const string1 = isString(text1) ? text1 : text1.messageText;
const string2 = isString(text2) ? text2 : text2.messageText;
const res = compareStringsCaseSensitive(string1, string2);
if (res) {
return res;
}
text1 = isString(text1) ? undefined : text1.next;
text2 = isString(text2) ? undefined : text2.next;
}
if (!text1 && !text2) {
// if the chains are done, then these messages are the same.
return Comparison.EqualTo;
}
// We still have one chain remaining. The shorter chain should come first.
return text1 ? Comparison.GreaterThan : Comparison.LessThan;
}
export function sortAndDeduplicateDiagnostics(diagnostics: ReadonlyArray<Diagnostic>): Diagnostic[] {
return sortAndDeduplicate(diagnostics, compareDiagnostics);
}
export function getEmitScriptTarget(compilerOptions: CompilerOptions) {
return compilerOptions.target || ScriptTarget.ES3;
}
export function getEmitModuleKind(compilerOptions: CompilerOptions) {
return typeof compilerOptions.module === "number" ?
compilerOptions.module :
getEmitScriptTarget(compilerOptions) >= ScriptTarget.ES2015 ? ModuleKind.ES2015 : ModuleKind.CommonJS;
}
export function getEmitModuleResolutionKind(compilerOptions: CompilerOptions) {
let moduleResolution = compilerOptions.moduleResolution;
if (moduleResolution === undefined) {
moduleResolution = getEmitModuleKind(compilerOptions) === ModuleKind.CommonJS ? ModuleResolutionKind.NodeJs : ModuleResolutionKind.Classic;
}
return moduleResolution;
}
export function getAllowSyntheticDefaultImports(compilerOptions: CompilerOptions) {
const moduleKind = getEmitModuleKind(compilerOptions);
return compilerOptions.allowSyntheticDefaultImports !== undefined
? compilerOptions.allowSyntheticDefaultImports
: moduleKind === ModuleKind.System;
}
export type StrictOptionName = "noImplicitAny" | "noImplicitThis" | "strictNullChecks" | "strictFunctionTypes" | "strictPropertyInitialization" | "alwaysStrict";
export function getStrictOptionValue(compilerOptions: CompilerOptions, flag: StrictOptionName): boolean {
return compilerOptions[flag] === undefined ? compilerOptions.strict : compilerOptions[flag];
}
export interface ObjectAllocator {
getNodeConstructor(): new (kind: SyntaxKind, pos?: number, end?: number) => Node;
getTokenConstructor(): new <TKind extends SyntaxKind>(kind: TKind, pos?: number, end?: number) => Token<TKind>;
getIdentifierConstructor(): new (kind: SyntaxKind.Identifier, pos?: number, end?: number) => Identifier;
getSourceFileConstructor(): new (kind: SyntaxKind.SourceFile, pos?: number, end?: number) => SourceFile;
getSymbolConstructor(): new (flags: SymbolFlags, name: __String) => Symbol;
getTypeConstructor(): new (checker: TypeChecker, flags: TypeFlags) => Type;
getSignatureConstructor(): new (checker: TypeChecker) => Signature;
getSourceMapSourceConstructor(): new (fileName: string, text: string, skipTrivia?: (pos: number) => number) => SourceMapSource;
}
function Symbol(this: Symbol, flags: SymbolFlags, name: __String) {
this.flags = flags;
this.escapedName = name;
this.declarations = undefined;
}
function Type(this: Type, checker: TypeChecker, flags: TypeFlags) {
this.flags = flags;
if (Debug.isDebugging) {
this.checker = checker;
}
}
function Signature() {} // tslint:disable-line no-empty
function Node(this: Node, kind: SyntaxKind, pos: number, end: number) {
this.id = 0;
this.kind = kind;
this.pos = pos;
this.end = end;
this.flags = NodeFlags.None;
this.modifierFlagsCache = ModifierFlags.None;
this.transformFlags = TransformFlags.None;
this.parent = undefined;
this.original = undefined;
}
function SourceMapSource(this: SourceMapSource, fileName: string, text: string, skipTrivia?: (pos: number) => number) {
this.fileName = fileName;
this.text = text;
this.skipTrivia = skipTrivia || (pos => pos);
}
export let objectAllocator: ObjectAllocator = {
getNodeConstructor: () => <any>Node,
getTokenConstructor: () => <any>Node,
getIdentifierConstructor: () => <any>Node,
getSourceFileConstructor: () => <any>Node,
getSymbolConstructor: () => <any>Symbol,
getTypeConstructor: () => <any>Type,
getSignatureConstructor: () => <any>Signature,
getSourceMapSourceConstructor: () => <any>SourceMapSource,
};
export function positionIsSynthesized(pos: number): boolean {
// This is a fast way of testing the following conditions:
// pos === undefined || pos === null || isNaN(pos) || pos < 0;
return !(pos >= 0);
}
export function isCheckJsEnabledForFile(sourceFile: SourceFile, compilerOptions: CompilerOptions) {
return sourceFile.checkJsDirective ? sourceFile.checkJsDirective.enabled : compilerOptions.checkJs;
}
export function and<T>(f: (arg: T) => boolean, g: (arg: T) => boolean) {
return (arg: T) => f(arg) && g(arg);
}
export function assertTypeIsNever(_: never): void { } // tslint:disable-line no-empty
export interface FileAndDirectoryExistence {
fileExists: boolean;
directoryExists: boolean;
}
export interface CachedDirectoryStructureHost extends DirectoryStructureHost {
/** Returns the queried result for the file exists and directory exists if at all it was done */
addOrDeleteFileOrDirectory(fileOrDirectory: string, fileOrDirectoryPath: Path): FileAndDirectoryExistence | undefined;
addOrDeleteFile(fileName: string, filePath: Path, eventKind: FileWatcherEventKind): void;
clearCache(): void;
}
interface MutableFileSystemEntries {
readonly files: string[];
readonly directories: string[];
}
export function createCachedDirectoryStructureHost(host: DirectoryStructureHost): CachedDirectoryStructureHost {
const cachedReadDirectoryResult = createMap<MutableFileSystemEntries>();
const getCurrentDirectory = memoize(() => host.getCurrentDirectory());
const getCanonicalFileName = createGetCanonicalFileName(host.useCaseSensitiveFileNames);
return {
useCaseSensitiveFileNames: host.useCaseSensitiveFileNames,
newLine: host.newLine,
readFile: (path, encoding) => host.readFile(path, encoding),
write: s => host.write(s),
writeFile,
fileExists,
directoryExists,
createDirectory,
getCurrentDirectory,
getDirectories,
readDirectory,
addOrDeleteFileOrDirectory,
addOrDeleteFile,
clearCache,
exit: code => host.exit(code)
};
function toPath(fileName: string) {
return ts.toPath(fileName, getCurrentDirectory(), getCanonicalFileName);
}
function getCachedFileSystemEntries(rootDirPath: Path): MutableFileSystemEntries | undefined {
return cachedReadDirectoryResult.get(rootDirPath);
}
function getCachedFileSystemEntriesForBaseDir(path: Path): MutableFileSystemEntries | undefined {
return getCachedFileSystemEntries(getDirectoryPath(path));
}
function getBaseNameOfFileName(fileName: string) {
return getBaseFileName(normalizePath(fileName));
}
function createCachedFileSystemEntries(rootDir: string, rootDirPath: Path) {
const resultFromHost: MutableFileSystemEntries = {
files: map(host.readDirectory(rootDir, /*extensions*/ undefined, /*exclude*/ undefined, /*include*/["*.*"]), getBaseNameOfFileName) || [],
directories: host.getDirectories(rootDir) || []
};
cachedReadDirectoryResult.set(rootDirPath, resultFromHost);
return resultFromHost;
}
/**
* If the readDirectory result was already cached, it returns that
* Otherwise gets result from host and caches it.
* The host request is done under try catch block to avoid caching incorrect result
*/
function tryReadDirectory(rootDir: string, rootDirPath: Path): MutableFileSystemEntries | undefined {
const cachedResult = getCachedFileSystemEntries(rootDirPath);
if (cachedResult) {
return cachedResult;
}
try {
return createCachedFileSystemEntries(rootDir, rootDirPath);
}
catch (_e) {
// If there is exception to read directories, dont cache the result and direct the calls to host
Debug.assert(!cachedReadDirectoryResult.has(rootDirPath));
return undefined;
}
}
function fileNameEqual(name1: string, name2: string) {
return getCanonicalFileName(name1) === getCanonicalFileName(name2);
}
function hasEntry(entries: ReadonlyArray<string>, name: string) {
return some(entries, file => fileNameEqual(file, name));
}
function updateFileSystemEntry(entries: string[], baseName: string, isValid: boolean) {
if (hasEntry(entries, baseName)) {
if (!isValid) {
return filterMutate(entries, entry => !fileNameEqual(entry, baseName));
}
}
else if (isValid) {
return entries.push(baseName);
}
}
function writeFile(fileName: string, data: string, writeByteOrderMark?: boolean): void {
const path = toPath(fileName);
const result = getCachedFileSystemEntriesForBaseDir(path);
if (result) {
updateFilesOfFileSystemEntry(result, getBaseNameOfFileName(fileName), /*fileExists*/ true);
}
return host.writeFile(fileName, data, writeByteOrderMark);
}
function fileExists(fileName: string): boolean {
const path = toPath(fileName);
const result = getCachedFileSystemEntriesForBaseDir(path);
return result && hasEntry(result.files, getBaseNameOfFileName(fileName)) ||
host.fileExists(fileName);
}
function directoryExists(dirPath: string): boolean {
const path = toPath(dirPath);
return cachedReadDirectoryResult.has(path) || host.directoryExists(dirPath);
}
function createDirectory(dirPath: string) {
const path = toPath(dirPath);
const result = getCachedFileSystemEntriesForBaseDir(path);
const baseFileName = getBaseNameOfFileName(dirPath);
if (result) {
updateFileSystemEntry(result.directories, baseFileName, /*isValid*/ true);
}
host.createDirectory(dirPath);
}
function getDirectories(rootDir: string): string[] {
const rootDirPath = toPath(rootDir);
const result = tryReadDirectory(rootDir, rootDirPath);
if (result) {
return result.directories.slice();
}
return host.getDirectories(rootDir);
}
function readDirectory(rootDir: string, extensions?: ReadonlyArray<string>, excludes?: ReadonlyArray<string>, includes?: ReadonlyArray<string>, depth?: number): string[] {
const rootDirPath = toPath(rootDir);
const result = tryReadDirectory(rootDir, rootDirPath);
if (result) {
return matchFiles(rootDir, extensions, excludes, includes, host.useCaseSensitiveFileNames, getCurrentDirectory(), depth, getFileSystemEntries);
}
return host.readDirectory(rootDir, extensions, excludes, includes, depth);
function getFileSystemEntries(dir: string) {
const path = toPath(dir);
if (path === rootDirPath) {
return result;
}
return getCachedFileSystemEntries(path) || createCachedFileSystemEntries(dir, path);
}
}
function addOrDeleteFileOrDirectory(fileOrDirectory: string, fileOrDirectoryPath: Path) {
const existingResult = getCachedFileSystemEntries(fileOrDirectoryPath);
if (existingResult) {
// Just clear the cache for now
// For now just clear the cache, since this could mean that multiple level entries might need to be re-evaluated
clearCache();
}
else {
// This was earlier a file (hence not in cached directory contents)
// or we never cached the directory containing it
const parentResult = getCachedFileSystemEntriesForBaseDir(fileOrDirectoryPath);
if (parentResult) {
const baseName = getBaseNameOfFileName(fileOrDirectory);
if (parentResult) {
const fsQueryResult: FileAndDirectoryExistence = {
fileExists: host.fileExists(fileOrDirectoryPath),
directoryExists: host.directoryExists(fileOrDirectoryPath)
};
if (fsQueryResult.directoryExists || hasEntry(parentResult.directories, baseName)) {
// Folder added or removed, clear the cache instead of updating the folder and its structure
clearCache();
}
else {
// No need to update the directory structure, just files
updateFilesOfFileSystemEntry(parentResult, baseName, fsQueryResult.fileExists);
}
return fsQueryResult;
}
}
}
}
function addOrDeleteFile(fileName: string, filePath: Path, eventKind: FileWatcherEventKind) {
if (eventKind === FileWatcherEventKind.Changed) {
return;
}
const parentResult = getCachedFileSystemEntriesForBaseDir(filePath);
if (parentResult) {
updateFilesOfFileSystemEntry(parentResult, getBaseNameOfFileName(fileName), eventKind === FileWatcherEventKind.Created);
}
}
function updateFilesOfFileSystemEntry(parentResult: MutableFileSystemEntries, baseName: string, fileExists: boolean) {
updateFileSystemEntry(parentResult.files, baseName, fileExists);
}
function clearCache() {
cachedReadDirectoryResult.clear();
}
}
}