https://github.com/Microsoft/TypeScript
Tip revision: be939452d269dbb624c046993385dda37617ed76 authored by Nathan Shively-Sanders on 02 August 2022, 21:59:59 UTC
restrict check to es modules
restrict check to es modules
Tip revision: be93945
emitter.ts
namespace ts {
const brackets = createBracketsMap();
/*@internal*/
export function isBuildInfoFile(file: string) {
return fileExtensionIs(file, Extension.TsBuildInfo);
}
/*@internal*/
/**
* Iterates over the source files that are expected to have an emit output.
*
* @param host An EmitHost.
* @param action The action to execute.
* @param sourceFilesOrTargetSourceFile
* If an array, the full list of source files to emit.
* Else, calls `getSourceFilesToEmit` with the (optional) target source file to determine the list of source files to emit.
*/
export function forEachEmittedFile<T>(
host: EmitHost, action: (emitFileNames: EmitFileNames, sourceFileOrBundle: SourceFile | Bundle | undefined) => T,
sourceFilesOrTargetSourceFile?: readonly SourceFile[] | SourceFile,
forceDtsEmit = false,
onlyBuildInfo?: boolean,
includeBuildInfo?: boolean) {
const sourceFiles = isArray(sourceFilesOrTargetSourceFile) ? sourceFilesOrTargetSourceFile : getSourceFilesToEmit(host, sourceFilesOrTargetSourceFile, forceDtsEmit);
const options = host.getCompilerOptions();
if (outFile(options)) {
const prepends = host.getPrependNodes();
if (sourceFiles.length || prepends.length) {
const bundle = factory.createBundle(sourceFiles, prepends);
const result = action(getOutputPathsFor(bundle, host, forceDtsEmit), bundle);
if (result) {
return result;
}
}
}
else {
if (!onlyBuildInfo) {
for (const sourceFile of sourceFiles) {
const result = action(getOutputPathsFor(sourceFile, host, forceDtsEmit), sourceFile);
if (result) {
return result;
}
}
}
if (includeBuildInfo) {
const buildInfoPath = getTsBuildInfoEmitOutputFilePath(options);
if (buildInfoPath) return action({ buildInfoPath }, /*sourceFileOrBundle*/ undefined);
}
}
}
export function getTsBuildInfoEmitOutputFilePath(options: CompilerOptions) {
const configFile = options.configFilePath;
if (!isIncrementalCompilation(options)) return undefined;
if (options.tsBuildInfoFile) return options.tsBuildInfoFile;
const outPath = outFile(options);
let buildInfoExtensionLess: string;
if (outPath) {
buildInfoExtensionLess = removeFileExtension(outPath);
}
else {
if (!configFile) return undefined;
const configFileExtensionLess = removeFileExtension(configFile);
buildInfoExtensionLess = options.outDir ?
options.rootDir ?
resolvePath(options.outDir, getRelativePathFromDirectory(options.rootDir, configFileExtensionLess, /*ignoreCase*/ true)) :
combinePaths(options.outDir, getBaseFileName(configFileExtensionLess)) :
configFileExtensionLess;
}
return buildInfoExtensionLess + Extension.TsBuildInfo;
}
/*@internal*/
export function getOutputPathsForBundle(options: CompilerOptions, forceDtsPaths: boolean): EmitFileNames {
const outPath = outFile(options)!;
const jsFilePath = options.emitDeclarationOnly ? undefined : outPath;
const sourceMapFilePath = jsFilePath && getSourceMapFilePath(jsFilePath, options);
const declarationFilePath = (forceDtsPaths || getEmitDeclarations(options)) ? removeFileExtension(outPath) + Extension.Dts : undefined;
const declarationMapPath = declarationFilePath && getAreDeclarationMapsEnabled(options) ? declarationFilePath + ".map" : undefined;
const buildInfoPath = getTsBuildInfoEmitOutputFilePath(options);
return { jsFilePath, sourceMapFilePath, declarationFilePath, declarationMapPath, buildInfoPath };
}
/*@internal*/
export function getOutputPathsFor(sourceFile: SourceFile | Bundle, host: EmitHost, forceDtsPaths: boolean): EmitFileNames {
const options = host.getCompilerOptions();
if (sourceFile.kind === SyntaxKind.Bundle) {
return getOutputPathsForBundle(options, forceDtsPaths);
}
else {
const ownOutputFilePath = getOwnEmitOutputFilePath(sourceFile.fileName, host, getOutputExtension(sourceFile.fileName, options));
const isJsonFile = isJsonSourceFile(sourceFile);
// If json file emits to the same location skip writing it, if emitDeclarationOnly skip writing it
const isJsonEmittedToSameLocation = isJsonFile &&
comparePaths(sourceFile.fileName, ownOutputFilePath, host.getCurrentDirectory(), !host.useCaseSensitiveFileNames()) === Comparison.EqualTo;
const jsFilePath = options.emitDeclarationOnly || isJsonEmittedToSameLocation ? undefined : ownOutputFilePath;
const sourceMapFilePath = !jsFilePath || isJsonSourceFile(sourceFile) ? undefined : getSourceMapFilePath(jsFilePath, options);
const declarationFilePath = (forceDtsPaths || (getEmitDeclarations(options) && !isJsonFile)) ? getDeclarationEmitOutputFilePath(sourceFile.fileName, host) : undefined;
const declarationMapPath = declarationFilePath && getAreDeclarationMapsEnabled(options) ? declarationFilePath + ".map" : undefined;
return { jsFilePath, sourceMapFilePath, declarationFilePath, declarationMapPath, buildInfoPath: undefined };
}
}
function getSourceMapFilePath(jsFilePath: string, options: CompilerOptions) {
return (options.sourceMap && !options.inlineSourceMap) ? jsFilePath + ".map" : undefined;
}
/* @internal */
export function getOutputExtension(fileName: string, options: CompilerOptions): Extension {
return fileExtensionIs(fileName, Extension.Json) ? Extension.Json :
options.jsx === JsxEmit.Preserve && fileExtensionIsOneOf(fileName, [Extension.Jsx, Extension.Tsx]) ? Extension.Jsx :
fileExtensionIsOneOf(fileName, [Extension.Mts, Extension.Mjs]) ? Extension.Mjs :
fileExtensionIsOneOf(fileName, [Extension.Cts, Extension.Cjs]) ? Extension.Cjs :
Extension.Js;
}
function getOutputPathWithoutChangingExt(inputFileName: string, configFile: ParsedCommandLine, ignoreCase: boolean, outputDir: string | undefined, getCommonSourceDirectory?: () => string) {
return outputDir ?
resolvePath(
outputDir,
getRelativePathFromDirectory(getCommonSourceDirectory ? getCommonSourceDirectory() : getCommonSourceDirectoryOfConfig(configFile, ignoreCase), inputFileName, ignoreCase)
) :
inputFileName;
}
/* @internal */
export function getOutputDeclarationFileName(inputFileName: string, configFile: ParsedCommandLine, ignoreCase: boolean, getCommonSourceDirectory?: () => string) {
return changeExtension(
getOutputPathWithoutChangingExt(inputFileName, configFile, ignoreCase, configFile.options.declarationDir || configFile.options.outDir, getCommonSourceDirectory),
getDeclarationEmitExtensionForPath(inputFileName)
);
}
function getOutputJSFileName(inputFileName: string, configFile: ParsedCommandLine, ignoreCase: boolean, getCommonSourceDirectory?: () => string) {
if (configFile.options.emitDeclarationOnly) return undefined;
const isJsonFile = fileExtensionIs(inputFileName, Extension.Json);
const outputFileName = changeExtension(
getOutputPathWithoutChangingExt(inputFileName, configFile, ignoreCase, configFile.options.outDir, getCommonSourceDirectory),
getOutputExtension(inputFileName, configFile.options)
);
return !isJsonFile || comparePaths(inputFileName, outputFileName, Debug.checkDefined(configFile.options.configFilePath), ignoreCase) !== Comparison.EqualTo ?
outputFileName :
undefined;
}
function createAddOutput() {
let outputs: string[] | undefined;
return { addOutput, getOutputs };
function addOutput(path: string | undefined) {
if (path) {
(outputs || (outputs = [])).push(path);
}
}
function getOutputs(): readonly string[] {
return outputs || emptyArray;
}
}
function getSingleOutputFileNames(configFile: ParsedCommandLine, addOutput: ReturnType<typeof createAddOutput>["addOutput"]) {
const { jsFilePath, sourceMapFilePath, declarationFilePath, declarationMapPath, buildInfoPath } = getOutputPathsForBundle(configFile.options, /*forceDtsPaths*/ false);
addOutput(jsFilePath);
addOutput(sourceMapFilePath);
addOutput(declarationFilePath);
addOutput(declarationMapPath);
addOutput(buildInfoPath);
}
function getOwnOutputFileNames(configFile: ParsedCommandLine, inputFileName: string, ignoreCase: boolean, addOutput: ReturnType<typeof createAddOutput>["addOutput"], getCommonSourceDirectory?: () => string) {
if (isDeclarationFileName(inputFileName)) return;
const js = getOutputJSFileName(inputFileName, configFile, ignoreCase, getCommonSourceDirectory);
addOutput(js);
if (fileExtensionIs(inputFileName, Extension.Json)) return;
if (js && configFile.options.sourceMap) {
addOutput(`${js}.map`);
}
if (getEmitDeclarations(configFile.options)) {
const dts = getOutputDeclarationFileName(inputFileName, configFile, ignoreCase, getCommonSourceDirectory);
addOutput(dts);
if (configFile.options.declarationMap) {
addOutput(`${dts}.map`);
}
}
}
/*@internal*/
export function getCommonSourceDirectory(
options: CompilerOptions,
emittedFiles: () => readonly string[],
currentDirectory: string,
getCanonicalFileName: GetCanonicalFileName,
checkSourceFilesBelongToPath?: (commonSourceDirectory: string) => void
): string {
let commonSourceDirectory;
if (options.rootDir) {
// If a rootDir is specified use it as the commonSourceDirectory
commonSourceDirectory = getNormalizedAbsolutePath(options.rootDir, currentDirectory);
checkSourceFilesBelongToPath?.(options.rootDir);
}
else if (options.composite && options.configFilePath) {
// Project compilations never infer their root from the input source paths
commonSourceDirectory = getDirectoryPath(normalizeSlashes(options.configFilePath));
checkSourceFilesBelongToPath?.(commonSourceDirectory);
}
else {
commonSourceDirectory = computeCommonSourceDirectoryOfFilenames(emittedFiles(), currentDirectory, getCanonicalFileName);
}
if (commonSourceDirectory && commonSourceDirectory[commonSourceDirectory.length - 1] !== directorySeparator) {
// Make sure directory path ends with directory separator so this string can directly
// used to replace with "" to get the relative path of the source file and the relative path doesn't
// start with / making it rooted path
commonSourceDirectory += directorySeparator;
}
return commonSourceDirectory;
}
/*@internal*/
export function getCommonSourceDirectoryOfConfig({ options, fileNames }: ParsedCommandLine, ignoreCase: boolean): string {
return getCommonSourceDirectory(
options,
() => filter(fileNames, file => !(options.noEmitForJsFiles && fileExtensionIsOneOf(file, supportedJSExtensionsFlat)) && !isDeclarationFileName(file)),
getDirectoryPath(normalizeSlashes(Debug.checkDefined(options.configFilePath))),
createGetCanonicalFileName(!ignoreCase)
);
}
/*@internal*/
export function getAllProjectOutputs(configFile: ParsedCommandLine, ignoreCase: boolean): readonly string[] {
const { addOutput, getOutputs } = createAddOutput();
if (outFile(configFile.options)) {
getSingleOutputFileNames(configFile, addOutput);
}
else {
const getCommonSourceDirectory = memoize(() => getCommonSourceDirectoryOfConfig(configFile, ignoreCase));
for (const inputFileName of configFile.fileNames) {
getOwnOutputFileNames(configFile, inputFileName, ignoreCase, addOutput, getCommonSourceDirectory);
}
addOutput(getTsBuildInfoEmitOutputFilePath(configFile.options));
}
return getOutputs();
}
export function getOutputFileNames(commandLine: ParsedCommandLine, inputFileName: string, ignoreCase: boolean): readonly string[] {
inputFileName = normalizePath(inputFileName);
Debug.assert(contains(commandLine.fileNames, inputFileName), `Expected fileName to be present in command line`);
const { addOutput, getOutputs } = createAddOutput();
if (outFile(commandLine.options)) {
getSingleOutputFileNames(commandLine, addOutput);
}
else {
getOwnOutputFileNames(commandLine, inputFileName, ignoreCase, addOutput);
}
return getOutputs();
}
/*@internal*/
export function getFirstProjectOutput(configFile: ParsedCommandLine, ignoreCase: boolean): string {
if (outFile(configFile.options)) {
const { jsFilePath } = getOutputPathsForBundle(configFile.options, /*forceDtsPaths*/ false);
return Debug.checkDefined(jsFilePath, `project ${configFile.options.configFilePath} expected to have at least one output`);
}
const getCommonSourceDirectory = memoize(() => getCommonSourceDirectoryOfConfig(configFile, ignoreCase));
for (const inputFileName of configFile.fileNames) {
if (isDeclarationFileName(inputFileName)) continue;
const jsFilePath = getOutputJSFileName(inputFileName, configFile, ignoreCase, getCommonSourceDirectory);
if (jsFilePath) return jsFilePath;
if (fileExtensionIs(inputFileName, Extension.Json)) continue;
if (getEmitDeclarations(configFile.options)) {
return getOutputDeclarationFileName(inputFileName, configFile, ignoreCase, getCommonSourceDirectory);
}
}
const buildInfoPath = getTsBuildInfoEmitOutputFilePath(configFile.options);
if (buildInfoPath) return buildInfoPath;
return Debug.fail(`project ${configFile.options.configFilePath} expected to have at least one output`);
}
/*@internal*/
// targetSourceFile is when users only want one file in entire project to be emitted. This is used in compileOnSave feature
export function emitFiles(resolver: EmitResolver, host: EmitHost, targetSourceFile: SourceFile | undefined, { scriptTransformers, declarationTransformers }: EmitTransformers, emitOnlyDtsFiles?: boolean, onlyBuildInfo?: boolean, forceDtsEmit?: boolean): EmitResult {
const compilerOptions = host.getCompilerOptions();
const sourceMapDataList: SourceMapEmitResult[] | undefined = (compilerOptions.sourceMap || compilerOptions.inlineSourceMap || getAreDeclarationMapsEnabled(compilerOptions)) ? [] : undefined;
const emittedFilesList: string[] | undefined = compilerOptions.listEmittedFiles ? [] : undefined;
const emitterDiagnostics = createDiagnosticCollection();
const newLine = getNewLineCharacter(compilerOptions, () => host.getNewLine());
const writer = createTextWriter(newLine);
const { enter, exit } = performance.createTimer("printTime", "beforePrint", "afterPrint");
let bundleBuildInfo: BundleBuildInfo | undefined;
let emitSkipped = false;
// Emit each output file
enter();
forEachEmittedFile(
host,
emitSourceFileOrBundle,
getSourceFilesToEmit(host, targetSourceFile, forceDtsEmit),
forceDtsEmit,
onlyBuildInfo,
!targetSourceFile
);
exit();
return {
emitSkipped,
diagnostics: emitterDiagnostics.getDiagnostics(),
emittedFiles: emittedFilesList,
sourceMaps: sourceMapDataList,
};
function emitSourceFileOrBundle({ jsFilePath, sourceMapFilePath, declarationFilePath, declarationMapPath, buildInfoPath }: EmitFileNames, sourceFileOrBundle: SourceFile | Bundle | undefined) {
let buildInfoDirectory: string | undefined;
if (buildInfoPath && sourceFileOrBundle && isBundle(sourceFileOrBundle)) {
buildInfoDirectory = getDirectoryPath(getNormalizedAbsolutePath(buildInfoPath, host.getCurrentDirectory()));
bundleBuildInfo = {
commonSourceDirectory: relativeToBuildInfo(host.getCommonSourceDirectory()),
sourceFiles: sourceFileOrBundle.sourceFiles.map(file => relativeToBuildInfo(getNormalizedAbsolutePath(file.fileName, host.getCurrentDirectory())))
};
}
tracing?.push(tracing.Phase.Emit, "emitJsFileOrBundle", { jsFilePath });
emitJsFileOrBundle(sourceFileOrBundle, jsFilePath, sourceMapFilePath, relativeToBuildInfo);
tracing?.pop();
tracing?.push(tracing.Phase.Emit, "emitDeclarationFileOrBundle", { declarationFilePath });
emitDeclarationFileOrBundle(sourceFileOrBundle, declarationFilePath, declarationMapPath, relativeToBuildInfo);
tracing?.pop();
tracing?.push(tracing.Phase.Emit, "emitBuildInfo", { buildInfoPath });
emitBuildInfo(bundleBuildInfo, buildInfoPath);
tracing?.pop();
if (!emitSkipped && emittedFilesList) {
if (!emitOnlyDtsFiles) {
if (jsFilePath) {
emittedFilesList.push(jsFilePath);
}
if (sourceMapFilePath) {
emittedFilesList.push(sourceMapFilePath);
}
if (buildInfoPath) {
emittedFilesList.push(buildInfoPath);
}
}
if (declarationFilePath) {
emittedFilesList.push(declarationFilePath);
}
if (declarationMapPath) {
emittedFilesList.push(declarationMapPath);
}
}
function relativeToBuildInfo(path: string) {
return ensurePathIsNonModuleName(getRelativePathFromDirectory(buildInfoDirectory!, path, host.getCanonicalFileName));
}
}
function emitBuildInfo(bundle: BundleBuildInfo | undefined, buildInfoPath: string | undefined) {
// Write build information if applicable
if (!buildInfoPath || targetSourceFile || emitSkipped) return;
const program = host.getProgramBuildInfo();
if (host.isEmitBlocked(buildInfoPath)) {
emitSkipped = true;
return;
}
const version = ts.version; // Extracted into a const so the form is stable between namespace and module
const buildInfo: BuildInfo = { bundle, program, version };
// Pass buildinfo as additional data to avoid having to reparse
writeFile(host, emitterDiagnostics, buildInfoPath, getBuildInfoText(buildInfo), /*writeByteOrderMark*/ false, /*sourceFiles*/ undefined, { buildInfo });
}
function emitJsFileOrBundle(
sourceFileOrBundle: SourceFile | Bundle | undefined,
jsFilePath: string | undefined,
sourceMapFilePath: string | undefined,
relativeToBuildInfo: (path: string) => string) {
if (!sourceFileOrBundle || emitOnlyDtsFiles || !jsFilePath) {
return;
}
// Make sure not to write js file and source map file if any of them cannot be written
if (host.isEmitBlocked(jsFilePath) || compilerOptions.noEmit) {
emitSkipped = true;
return;
}
// Transform the source files
const transform = transformNodes(resolver, host, factory, compilerOptions, [sourceFileOrBundle], scriptTransformers, /*allowDtsFiles*/ false);
const printerOptions: PrinterOptions = {
removeComments: compilerOptions.removeComments,
newLine: compilerOptions.newLine,
noEmitHelpers: compilerOptions.noEmitHelpers,
module: compilerOptions.module,
target: compilerOptions.target,
sourceMap: compilerOptions.sourceMap,
inlineSourceMap: compilerOptions.inlineSourceMap,
inlineSources: compilerOptions.inlineSources,
extendedDiagnostics: compilerOptions.extendedDiagnostics,
writeBundleFileInfo: !!bundleBuildInfo,
relativeToBuildInfo
};
// Create a printer to print the nodes
const printer = createPrinter(printerOptions, {
// resolver hooks
hasGlobalName: resolver.hasGlobalName,
// transform hooks
onEmitNode: transform.emitNodeWithNotification,
isEmitNotificationEnabled: transform.isEmitNotificationEnabled,
substituteNode: transform.substituteNode,
});
Debug.assert(transform.transformed.length === 1, "Should only see one output from the transform");
printSourceFileOrBundle(jsFilePath, sourceMapFilePath, transform, printer, compilerOptions);
// Clean up emit nodes on parse tree
transform.dispose();
if (bundleBuildInfo) bundleBuildInfo.js = printer.bundleFileInfo;
}
function emitDeclarationFileOrBundle(
sourceFileOrBundle: SourceFile | Bundle | undefined,
declarationFilePath: string | undefined,
declarationMapPath: string | undefined,
relativeToBuildInfo: (path: string) => string) {
if (!sourceFileOrBundle) return;
if (!declarationFilePath) {
if (emitOnlyDtsFiles || compilerOptions.emitDeclarationOnly) emitSkipped = true;
return;
}
const sourceFiles = isSourceFile(sourceFileOrBundle) ? [sourceFileOrBundle] : sourceFileOrBundle.sourceFiles;
const filesForEmit = forceDtsEmit ? sourceFiles : filter(sourceFiles, isSourceFileNotJson);
// Setup and perform the transformation to retrieve declarations from the input files
const inputListOrBundle = outFile(compilerOptions) ? [factory.createBundle(filesForEmit, !isSourceFile(sourceFileOrBundle) ? sourceFileOrBundle.prepends : undefined)] : filesForEmit;
if (emitOnlyDtsFiles && !getEmitDeclarations(compilerOptions)) {
// Checker wont collect the linked aliases since thats only done when declaration is enabled.
// Do that here when emitting only dts files
filesForEmit.forEach(collectLinkedAliases);
}
const declarationTransform = transformNodes(resolver, host, factory, compilerOptions, inputListOrBundle, declarationTransformers, /*allowDtsFiles*/ false);
if (length(declarationTransform.diagnostics)) {
for (const diagnostic of declarationTransform.diagnostics!) {
emitterDiagnostics.add(diagnostic);
}
}
const printerOptions: PrinterOptions = {
removeComments: compilerOptions.removeComments,
newLine: compilerOptions.newLine,
noEmitHelpers: true,
module: compilerOptions.module,
target: compilerOptions.target,
sourceMap: !forceDtsEmit && compilerOptions.declarationMap,
inlineSourceMap: compilerOptions.inlineSourceMap,
extendedDiagnostics: compilerOptions.extendedDiagnostics,
onlyPrintJsDocStyle: true,
writeBundleFileInfo: !!bundleBuildInfo,
recordInternalSection: !!bundleBuildInfo,
relativeToBuildInfo
};
const declarationPrinter = createPrinter(printerOptions, {
// resolver hooks
hasGlobalName: resolver.hasGlobalName,
// transform hooks
onEmitNode: declarationTransform.emitNodeWithNotification,
isEmitNotificationEnabled: declarationTransform.isEmitNotificationEnabled,
substituteNode: declarationTransform.substituteNode,
});
const declBlocked = (!!declarationTransform.diagnostics && !!declarationTransform.diagnostics.length) || !!host.isEmitBlocked(declarationFilePath) || !!compilerOptions.noEmit;
emitSkipped = emitSkipped || declBlocked;
if (!declBlocked || forceDtsEmit) {
Debug.assert(declarationTransform.transformed.length === 1, "Should only see one output from the decl transform");
printSourceFileOrBundle(
declarationFilePath,
declarationMapPath,
declarationTransform,
declarationPrinter,
{
sourceMap: printerOptions.sourceMap,
sourceRoot: compilerOptions.sourceRoot,
mapRoot: compilerOptions.mapRoot,
extendedDiagnostics: compilerOptions.extendedDiagnostics,
// Explicitly do not passthru either `inline` option
}
);
}
declarationTransform.dispose();
if (bundleBuildInfo) bundleBuildInfo.dts = declarationPrinter.bundleFileInfo;
}
function collectLinkedAliases(node: Node) {
if (isExportAssignment(node)) {
if (node.expression.kind === SyntaxKind.Identifier) {
resolver.collectLinkedAliases(node.expression as Identifier, /*setVisibility*/ true);
}
return;
}
else if (isExportSpecifier(node)) {
resolver.collectLinkedAliases(node.propertyName || node.name, /*setVisibility*/ true);
return;
}
forEachChild(node, collectLinkedAliases);
}
function printSourceFileOrBundle(jsFilePath: string, sourceMapFilePath: string | undefined, transform: TransformationResult<SourceFile | Bundle>, printer: Printer, mapOptions: SourceMapOptions) {
const sourceFileOrBundle = transform.transformed[0];
const bundle = sourceFileOrBundle.kind === SyntaxKind.Bundle ? sourceFileOrBundle : undefined;
const sourceFile = sourceFileOrBundle.kind === SyntaxKind.SourceFile ? sourceFileOrBundle : undefined;
const sourceFiles = bundle ? bundle.sourceFiles : [sourceFile!];
let sourceMapGenerator: SourceMapGenerator | undefined;
if (shouldEmitSourceMaps(mapOptions, sourceFileOrBundle)) {
sourceMapGenerator = createSourceMapGenerator(
host,
getBaseFileName(normalizeSlashes(jsFilePath)),
getSourceRoot(mapOptions),
getSourceMapDirectory(mapOptions, jsFilePath, sourceFile),
mapOptions);
}
if (bundle) {
printer.writeBundle(bundle, writer, sourceMapGenerator);
}
else {
printer.writeFile(sourceFile!, writer, sourceMapGenerator);
}
let sourceMapUrlPos;
if (sourceMapGenerator) {
if (sourceMapDataList) {
sourceMapDataList.push({
inputSourceFileNames: sourceMapGenerator.getSources(),
sourceMap: sourceMapGenerator.toJSON()
});
}
const sourceMappingURL = getSourceMappingURL(
mapOptions,
sourceMapGenerator,
jsFilePath,
sourceMapFilePath,
sourceFile);
if (sourceMappingURL) {
if (!writer.isAtStartOfLine()) writer.rawWrite(newLine);
sourceMapUrlPos = writer.getTextPos();
writer.writeComment(`//# ${"sourceMappingURL"}=${sourceMappingURL}`); // Tools can sometimes see this line as a source mapping url comment
}
// Write the source map
if (sourceMapFilePath) {
const sourceMap = sourceMapGenerator.toString();
writeFile(host, emitterDiagnostics, sourceMapFilePath, sourceMap, /*writeByteOrderMark*/ false, sourceFiles);
if (printer.bundleFileInfo) printer.bundleFileInfo.mapHash = computeSignature(sourceMap, maybeBind(host, host.createHash));
}
}
else {
writer.writeLine();
}
// Write the output file
const text = writer.getText();
writeFile(host, emitterDiagnostics, jsFilePath, text, !!compilerOptions.emitBOM, sourceFiles, { sourceMapUrlPos, diagnostics: transform.diagnostics });
// We store the hash of the text written in the buildinfo to ensure that text of the referenced d.ts file is same as whats in the buildinfo
// This is needed because incremental can be toggled between two runs and we might use stale file text to do text manipulation in prepend mode
if (printer.bundleFileInfo) printer.bundleFileInfo.hash = computeSignature(text, maybeBind(host, host.createHash));
// Reset state
writer.clear();
}
interface SourceMapOptions {
sourceMap?: boolean;
inlineSourceMap?: boolean;
inlineSources?: boolean;
sourceRoot?: string;
mapRoot?: string;
extendedDiagnostics?: boolean;
}
function shouldEmitSourceMaps(mapOptions: SourceMapOptions, sourceFileOrBundle: SourceFile | Bundle) {
return (mapOptions.sourceMap || mapOptions.inlineSourceMap)
&& (sourceFileOrBundle.kind !== SyntaxKind.SourceFile || !fileExtensionIs(sourceFileOrBundle.fileName, Extension.Json));
}
function getSourceRoot(mapOptions: SourceMapOptions) {
// Normalize source root and make sure it has trailing "/" so that it can be used to combine paths with the
// relative paths of the sources list in the sourcemap
const sourceRoot = normalizeSlashes(mapOptions.sourceRoot || "");
return sourceRoot ? ensureTrailingDirectorySeparator(sourceRoot) : sourceRoot;
}
function getSourceMapDirectory(mapOptions: SourceMapOptions, filePath: string, sourceFile: SourceFile | undefined) {
if (mapOptions.sourceRoot) return host.getCommonSourceDirectory();
if (mapOptions.mapRoot) {
let sourceMapDir = normalizeSlashes(mapOptions.mapRoot);
if (sourceFile) {
// For modules or multiple emit files the mapRoot will have directory structure like the sources
// So if src\a.ts and src\lib\b.ts are compiled together user would be moving the maps into mapRoot\a.js.map and mapRoot\lib\b.js.map
sourceMapDir = getDirectoryPath(getSourceFilePathInNewDir(sourceFile.fileName, host, sourceMapDir));
}
if (getRootLength(sourceMapDir) === 0) {
// The relative paths are relative to the common directory
sourceMapDir = combinePaths(host.getCommonSourceDirectory(), sourceMapDir);
}
return sourceMapDir;
}
return getDirectoryPath(normalizePath(filePath));
}
function getSourceMappingURL(mapOptions: SourceMapOptions, sourceMapGenerator: SourceMapGenerator, filePath: string, sourceMapFilePath: string | undefined, sourceFile: SourceFile | undefined) {
if (mapOptions.inlineSourceMap) {
// Encode the sourceMap into the sourceMap url
const sourceMapText = sourceMapGenerator.toString();
const base64SourceMapText = base64encode(sys, sourceMapText);
return `data:application/json;base64,${base64SourceMapText}`;
}
const sourceMapFile = getBaseFileName(normalizeSlashes(Debug.checkDefined(sourceMapFilePath)));
if (mapOptions.mapRoot) {
let sourceMapDir = normalizeSlashes(mapOptions.mapRoot);
if (sourceFile) {
// For modules or multiple emit files the mapRoot will have directory structure like the sources
// So if src\a.ts and src\lib\b.ts are compiled together user would be moving the maps into mapRoot\a.js.map and mapRoot\lib\b.js.map
sourceMapDir = getDirectoryPath(getSourceFilePathInNewDir(sourceFile.fileName, host, sourceMapDir));
}
if (getRootLength(sourceMapDir) === 0) {
// The relative paths are relative to the common directory
sourceMapDir = combinePaths(host.getCommonSourceDirectory(), sourceMapDir);
return encodeURI(
getRelativePathToDirectoryOrUrl(
getDirectoryPath(normalizePath(filePath)), // get the relative sourceMapDir path based on jsFilePath
combinePaths(sourceMapDir, sourceMapFile), // this is where user expects to see sourceMap
host.getCurrentDirectory(),
host.getCanonicalFileName,
/*isAbsolutePathAnUrl*/ true));
}
else {
return encodeURI(combinePaths(sourceMapDir, sourceMapFile));
}
}
return encodeURI(sourceMapFile);
}
}
/*@internal*/
export function getBuildInfoText(buildInfo: BuildInfo) {
return JSON.stringify(buildInfo);
}
/*@internal*/
export function getBuildInfo(buildInfoText: string) {
return JSON.parse(buildInfoText) as BuildInfo;
}
/*@internal*/
export const notImplementedResolver: EmitResolver = {
hasGlobalName: notImplemented,
getReferencedExportContainer: notImplemented,
getReferencedImportDeclaration: notImplemented,
getReferencedDeclarationWithCollidingName: notImplemented,
isDeclarationWithCollidingName: notImplemented,
isValueAliasDeclaration: notImplemented,
isReferencedAliasDeclaration: notImplemented,
isTopLevelValueImportEqualsWithEntityName: notImplemented,
getNodeCheckFlags: notImplemented,
isDeclarationVisible: notImplemented,
isLateBound: (_node): _node is LateBoundDeclaration => false,
collectLinkedAliases: notImplemented,
isImplementationOfOverload: notImplemented,
isRequiredInitializedParameter: notImplemented,
isOptionalUninitializedParameterProperty: notImplemented,
isExpandoFunctionDeclaration: notImplemented,
getPropertiesOfContainerFunction: notImplemented,
createTypeOfDeclaration: notImplemented,
createReturnTypeOfSignatureDeclaration: notImplemented,
createTypeOfExpression: notImplemented,
createLiteralConstValue: notImplemented,
isSymbolAccessible: notImplemented,
isEntityNameVisible: notImplemented,
// Returns the constant value this property access resolves to: notImplemented, or 'undefined' for a non-constant
getConstantValue: notImplemented,
getReferencedValueDeclaration: notImplemented,
getTypeReferenceSerializationKind: notImplemented,
isOptionalParameter: notImplemented,
moduleExportsSomeValue: notImplemented,
isArgumentsLocalBinding: notImplemented,
getExternalModuleFileFromDeclaration: notImplemented,
getTypeReferenceDirectivesForEntityName: notImplemented,
getTypeReferenceDirectivesForSymbol: notImplemented,
isLiteralConstDeclaration: notImplemented,
getJsxFactoryEntity: notImplemented,
getJsxFragmentFactoryEntity: notImplemented,
getAllAccessorDeclarations: notImplemented,
getSymbolOfExternalModuleSpecifier: notImplemented,
isBindingCapturedByNode: notImplemented,
getDeclarationStatementsForSourceFile: notImplemented,
isImportRequiredByAugmentation: notImplemented,
};
/*@internal*/
/** File that isnt present resulting in error or output files */
export type EmitUsingBuildInfoResult = string | readonly OutputFile[];
/*@internal*/
export interface EmitUsingBuildInfoHost extends ModuleResolutionHost {
getCurrentDirectory(): string;
getCanonicalFileName(fileName: string): string;
useCaseSensitiveFileNames(): boolean;
getNewLine(): string;
createHash?(data: string): string;
getBuildInfo?(fileName: string, configFilePath: string | undefined): BuildInfo | undefined;
}
function createSourceFilesFromBundleBuildInfo(bundle: BundleBuildInfo, buildInfoDirectory: string, host: EmitUsingBuildInfoHost): readonly SourceFile[] {
const jsBundle = Debug.checkDefined(bundle.js);
const prologueMap = jsBundle.sources?.prologues && arrayToMap(jsBundle.sources.prologues, prologueInfo => prologueInfo.file);
return bundle.sourceFiles.map((fileName, index) => {
const prologueInfo = prologueMap?.get(index);
const statements = prologueInfo?.directives.map(directive => {
const literal = setTextRange(factory.createStringLiteral(directive.expression.text), directive.expression);
const statement = setTextRange(factory.createExpressionStatement(literal), directive);
setParent(literal, statement);
return statement;
});
const eofToken = factory.createToken(SyntaxKind.EndOfFileToken);
const sourceFile = factory.createSourceFile(statements ?? [], eofToken, NodeFlags.None);
sourceFile.fileName = getRelativePathFromDirectory(
host.getCurrentDirectory(),
getNormalizedAbsolutePath(fileName, buildInfoDirectory),
!host.useCaseSensitiveFileNames()
);
sourceFile.text = prologueInfo?.text ?? "";
setTextRangePosWidth(sourceFile, 0, prologueInfo?.text.length ?? 0);
setEachParent(sourceFile.statements, sourceFile);
setTextRangePosWidth(eofToken, sourceFile.end, 0);
setParent(eofToken, sourceFile);
return sourceFile;
});
}
/*@internal*/
export function emitUsingBuildInfo(
config: ParsedCommandLine,
host: EmitUsingBuildInfoHost,
getCommandLine: (ref: ProjectReference) => ParsedCommandLine | undefined,
customTransformers?: CustomTransformers
): EmitUsingBuildInfoResult {
const createHash = maybeBind(host, host.createHash);
const { buildInfoPath, jsFilePath, sourceMapFilePath, declarationFilePath, declarationMapPath } = getOutputPathsForBundle(config.options, /*forceDtsPaths*/ false);
let buildInfo: BuildInfo;
if (host.getBuildInfo) {
// If host directly provides buildinfo we can get it directly. This allows host to cache the buildinfo
const hostBuildInfo = host.getBuildInfo(buildInfoPath!, config.options.configFilePath);
if (!hostBuildInfo) return buildInfoPath!;
buildInfo = hostBuildInfo;
}
else {
const buildInfoText = host.readFile(buildInfoPath!);
if (!buildInfoText) return buildInfoPath!;
buildInfo = getBuildInfo(buildInfoText);
}
if (!buildInfo.bundle || !buildInfo.bundle.js || (declarationFilePath && !buildInfo.bundle.dts)) return buildInfoPath!;
const jsFileText = host.readFile(Debug.checkDefined(jsFilePath));
if (!jsFileText) return jsFilePath!;
// If the jsFileText is not same has what it was created with, tsbuildinfo is stale so dont use it
if (computeSignature(jsFileText, createHash) !== buildInfo.bundle.js.hash) return jsFilePath!;
const sourceMapText = sourceMapFilePath && host.readFile(sourceMapFilePath);
// error if no source map or for now if inline sourcemap
if ((sourceMapFilePath && !sourceMapText) || config.options.inlineSourceMap) return sourceMapFilePath || "inline sourcemap decoding";
if (sourceMapFilePath && computeSignature(sourceMapText!, createHash) !== buildInfo.bundle.js.mapHash) return sourceMapFilePath;
// read declaration text
const declarationText = declarationFilePath && host.readFile(declarationFilePath);
if (declarationFilePath && !declarationText) return declarationFilePath;
if (declarationFilePath && computeSignature(declarationText!, createHash) !== buildInfo.bundle.dts!.hash) return declarationFilePath;
const declarationMapText = declarationMapPath && host.readFile(declarationMapPath);
// error if no source map or for now if inline sourcemap
if ((declarationMapPath && !declarationMapText) || config.options.inlineSourceMap) return declarationMapPath || "inline sourcemap decoding";
if (declarationMapPath && computeSignature(declarationMapText!, createHash) !== buildInfo.bundle.dts!.mapHash) return declarationMapPath;
const buildInfoDirectory = getDirectoryPath(getNormalizedAbsolutePath(buildInfoPath!, host.getCurrentDirectory()));
const ownPrependInput = createInputFiles(
jsFileText,
declarationText!,
sourceMapFilePath,
sourceMapText,
declarationMapPath,
declarationMapText,
jsFilePath,
declarationFilePath,
buildInfoPath,
buildInfo,
/*onlyOwnText*/ true
);
const outputFiles: OutputFile[] = [];
const prependNodes = createPrependNodes(config.projectReferences, getCommandLine, f => host.readFile(f));
const sourceFilesForJsEmit = createSourceFilesFromBundleBuildInfo(buildInfo.bundle, buildInfoDirectory, host);
let changedDtsText: string | undefined;
let changedDtsData: WriteFileCallbackData | undefined;
const emitHost: EmitHost = {
getPrependNodes: memoize(() => [...prependNodes, ownPrependInput]),
getCanonicalFileName: host.getCanonicalFileName,
getCommonSourceDirectory: () => getNormalizedAbsolutePath(buildInfo.bundle!.commonSourceDirectory, buildInfoDirectory),
getCompilerOptions: () => config.options,
getCurrentDirectory: () => host.getCurrentDirectory(),
getNewLine: () => host.getNewLine(),
getSourceFile: returnUndefined,
getSourceFileByPath: returnUndefined,
getSourceFiles: () => sourceFilesForJsEmit,
getLibFileFromReference: notImplemented,
isSourceFileFromExternalLibrary: returnFalse,
getResolvedProjectReferenceToRedirect: returnUndefined,
getProjectReferenceRedirect: returnUndefined,
isSourceOfProjectReferenceRedirect: returnFalse,
writeFile: (name, text, writeByteOrderMark, _onError, _sourceFiles, data) => {
switch (name) {
case jsFilePath:
if (jsFileText === text) return;
break;
case sourceMapFilePath:
if (sourceMapText === text) return;
break;
case buildInfoPath:
const newBuildInfo = data!.buildInfo!;
newBuildInfo.program = buildInfo.program;
if (newBuildInfo.program && changedDtsText !== undefined && config.options.composite) {
// Update the output signature
(newBuildInfo.program as ProgramBundleEmitBuildInfo).outSignature = computeSignature(changedDtsText, createHash, changedDtsData);
}
// Update sourceFileInfo
const { js, dts, sourceFiles } = buildInfo.bundle!;
newBuildInfo.bundle!.js!.sources = js!.sources;
if (dts) {
newBuildInfo.bundle!.dts!.sources = dts.sources;
}
newBuildInfo.bundle!.sourceFiles = sourceFiles;
outputFiles.push({ name, text: getBuildInfoText(newBuildInfo), writeByteOrderMark, buildInfo: newBuildInfo });
return;
case declarationFilePath:
if (declarationText === text) return;
changedDtsText = text;
changedDtsData = data;
break;
case declarationMapPath:
if (declarationMapText === text) return;
break;
default:
Debug.fail(`Unexpected path: ${name}`);
}
outputFiles.push({ name, text, writeByteOrderMark });
},
isEmitBlocked: returnFalse,
readFile: f => host.readFile(f),
fileExists: f => host.fileExists(f),
useCaseSensitiveFileNames: () => host.useCaseSensitiveFileNames(),
getProgramBuildInfo: returnUndefined,
getSourceFileFromReference: returnUndefined,
redirectTargetsMap: createMultiMap(),
getFileIncludeReasons: notImplemented,
createHash,
};
emitFiles(
notImplementedResolver,
emitHost,
/*targetSourceFile*/ undefined,
getTransformers(config.options, customTransformers)
);
return outputFiles;
}
const enum PipelinePhase {
Notification,
Substitution,
Comments,
SourceMaps,
Emit,
}
export function createPrinter(printerOptions: PrinterOptions = {}, handlers: PrintHandlers = {}): Printer {
const {
hasGlobalName,
onEmitNode = noEmitNotification,
isEmitNotificationEnabled,
substituteNode = noEmitSubstitution,
onBeforeEmitNode,
onAfterEmitNode,
onBeforeEmitNodeArray,
onAfterEmitNodeArray,
onBeforeEmitToken,
onAfterEmitToken
} = handlers;
const extendedDiagnostics = !!printerOptions.extendedDiagnostics;
const newLine = getNewLineCharacter(printerOptions);
const moduleKind = getEmitModuleKind(printerOptions);
const bundledHelpers = new Map<string, boolean>();
let currentSourceFile: SourceFile | undefined;
let nodeIdToGeneratedName: string[]; // Map of generated names for specific nodes.
let autoGeneratedIdToGeneratedName: string[]; // Map of generated names for temp and loop variables.
let generatedNames: Set<string>; // Set of names generated by the NameGenerator.
let tempFlagsStack: TempFlags[]; // Stack of enclosing name generation scopes.
let tempFlags: TempFlags; // TempFlags for the current name generation scope.
let reservedNamesStack: Set<string>[]; // Stack of TempFlags reserved in enclosing name generation scopes.
let reservedNames: Set<string>; // TempFlags to reserve in nested name generation scopes.
let preserveSourceNewlines = printerOptions.preserveSourceNewlines; // Can be overridden inside nodes with the `IgnoreSourceNewlines` emit flag.
let nextListElementPos: number | undefined; // See comment in `getLeadingLineTerminatorCount`.
let writer: EmitTextWriter;
let ownWriter: EmitTextWriter; // Reusable `EmitTextWriter` for basic printing.
let write = writeBase;
let isOwnFileEmit: boolean;
const bundleFileInfo = printerOptions.writeBundleFileInfo ? { sections: [] } as BundleFileInfo : undefined;
const relativeToBuildInfo = bundleFileInfo ? Debug.checkDefined(printerOptions.relativeToBuildInfo) : undefined;
const recordInternalSection = printerOptions.recordInternalSection;
let sourceFileTextPos = 0;
let sourceFileTextKind: BundleFileTextLikeKind = BundleFileSectionKind.Text;
// Source Maps
let sourceMapsDisabled = true;
let sourceMapGenerator: SourceMapGenerator | undefined;
let sourceMapSource: SourceMapSource;
let sourceMapSourceIndex = -1;
let mostRecentlyAddedSourceMapSource: SourceMapSource;
let mostRecentlyAddedSourceMapSourceIndex = -1;
// Comments
let containerPos = -1;
let containerEnd = -1;
let declarationListContainerEnd = -1;
let currentLineMap: readonly number[] | undefined;
let detachedCommentsInfo: { nodePos: number, detachedCommentEndPos: number }[] | undefined;
let hasWrittenComment = false;
let commentsDisabled = !!printerOptions.removeComments;
let lastSubstitution: Node | undefined;
let currentParenthesizerRule: ((node: Node) => Node) | undefined;
const { enter: enterComment, exit: exitComment } = performance.createTimerIf(extendedDiagnostics, "commentTime", "beforeComment", "afterComment");
const parenthesizer = factory.parenthesizer;
const typeArgumentParenthesizerRuleSelector: OrdinalParentheizerRuleSelector<Node> = {
select: index => index === 0 ? parenthesizer.parenthesizeLeadingTypeArgument : undefined
};
const emitBinaryExpression = createEmitBinaryExpression();
reset();
return {
// public API
printNode,
printList,
printFile,
printBundle,
// internal API
writeNode,
writeList,
writeFile,
writeBundle,
bundleFileInfo
};
function printNode(hint: EmitHint, node: Node, sourceFile: SourceFile): string {
switch (hint) {
case EmitHint.SourceFile:
Debug.assert(isSourceFile(node), "Expected a SourceFile node.");
break;
case EmitHint.IdentifierName:
Debug.assert(isIdentifier(node), "Expected an Identifier node.");
break;
case EmitHint.Expression:
Debug.assert(isExpression(node), "Expected an Expression node.");
break;
}
switch (node.kind) {
case SyntaxKind.SourceFile: return printFile(node as SourceFile);
case SyntaxKind.Bundle: return printBundle(node as Bundle);
case SyntaxKind.UnparsedSource: return printUnparsedSource(node as UnparsedSource);
}
writeNode(hint, node, sourceFile, beginPrint());
return endPrint();
}
function printList<T extends Node>(format: ListFormat, nodes: NodeArray<T>, sourceFile: SourceFile) {
writeList(format, nodes, sourceFile, beginPrint());
return endPrint();
}
function printBundle(bundle: Bundle): string {
writeBundle(bundle, beginPrint(), /*sourceMapEmitter*/ undefined);
return endPrint();
}
function printFile(sourceFile: SourceFile): string {
writeFile(sourceFile, beginPrint(), /*sourceMapEmitter*/ undefined);
return endPrint();
}
function printUnparsedSource(unparsed: UnparsedSource): string {
writeUnparsedSource(unparsed, beginPrint());
return endPrint();
}
/**
* If `sourceFile` is `undefined`, `node` must be a synthesized `TypeNode`.
*/
function writeNode(hint: EmitHint, node: TypeNode, sourceFile: undefined, output: EmitTextWriter): void;
function writeNode(hint: EmitHint, node: Node, sourceFile: SourceFile, output: EmitTextWriter): void;
function writeNode(hint: EmitHint, node: Node, sourceFile: SourceFile | undefined, output: EmitTextWriter) {
const previousWriter = writer;
setWriter(output, /*_sourceMapGenerator*/ undefined);
print(hint, node, sourceFile);
reset();
writer = previousWriter;
}
function writeList<T extends Node>(format: ListFormat, nodes: NodeArray<T>, sourceFile: SourceFile | undefined, output: EmitTextWriter) {
const previousWriter = writer;
setWriter(output, /*_sourceMapGenerator*/ undefined);
if (sourceFile) {
setSourceFile(sourceFile);
}
emitList(/*parentNode*/ undefined, nodes, format);
reset();
writer = previousWriter;
}
function getTextPosWithWriteLine() {
return writer.getTextPosWithWriteLine ? writer.getTextPosWithWriteLine() : writer.getTextPos();
}
function updateOrPushBundleFileTextLike(pos: number, end: number, kind: BundleFileTextLikeKind) {
const last = lastOrUndefined(bundleFileInfo!.sections);
if (last && last.kind === kind) {
last.end = end;
}
else {
bundleFileInfo!.sections.push({ pos, end, kind });
}
}
function recordBundleFileInternalSectionStart(node: Node) {
if (recordInternalSection &&
bundleFileInfo &&
currentSourceFile &&
(isDeclaration(node) || isVariableStatement(node)) &&
isInternalDeclaration(node, currentSourceFile) &&
sourceFileTextKind !== BundleFileSectionKind.Internal) {
const prevSourceFileTextKind = sourceFileTextKind;
recordBundleFileTextLikeSection(writer.getTextPos());
sourceFileTextPos = getTextPosWithWriteLine();
sourceFileTextKind = BundleFileSectionKind.Internal;
return prevSourceFileTextKind;
}
return undefined;
}
function recordBundleFileInternalSectionEnd(prevSourceFileTextKind: ReturnType<typeof recordBundleFileInternalSectionStart>) {
if (prevSourceFileTextKind) {
recordBundleFileTextLikeSection(writer.getTextPos());
sourceFileTextPos = getTextPosWithWriteLine();
sourceFileTextKind = prevSourceFileTextKind;
}
}
function recordBundleFileTextLikeSection(end: number) {
if (sourceFileTextPos < end) {
updateOrPushBundleFileTextLike(sourceFileTextPos, end, sourceFileTextKind);
return true;
}
return false;
}
function writeBundle(bundle: Bundle, output: EmitTextWriter, sourceMapGenerator: SourceMapGenerator | undefined) {
isOwnFileEmit = false;
const previousWriter = writer;
setWriter(output, sourceMapGenerator);
emitShebangIfNeeded(bundle);
emitPrologueDirectivesIfNeeded(bundle);
emitHelpers(bundle);
emitSyntheticTripleSlashReferencesIfNeeded(bundle);
for (const prepend of bundle.prepends) {
writeLine();
const pos = writer.getTextPos();
const savedSections = bundleFileInfo && bundleFileInfo.sections;
if (savedSections) bundleFileInfo.sections = [];
print(EmitHint.Unspecified, prepend, /*sourceFile*/ undefined);
if (bundleFileInfo) {
const newSections = bundleFileInfo.sections;
bundleFileInfo.sections = savedSections!;
if (prepend.oldFileOfCurrentEmit) bundleFileInfo.sections.push(...newSections);
else {
newSections.forEach(section => Debug.assert(isBundleFileTextLike(section)));
bundleFileInfo.sections.push({
pos,
end: writer.getTextPos(),
kind: BundleFileSectionKind.Prepend,
data: relativeToBuildInfo!((prepend as UnparsedSource).fileName),
texts: newSections as BundleFileTextLike[]
});
}
}
}
sourceFileTextPos = getTextPosWithWriteLine();
for (const sourceFile of bundle.sourceFiles) {
print(EmitHint.SourceFile, sourceFile, sourceFile);
}
if (bundleFileInfo && bundle.sourceFiles.length) {
const end = writer.getTextPos();
if (recordBundleFileTextLikeSection(end)) {
// Store prologues
const prologues = getPrologueDirectivesFromBundledSourceFiles(bundle);
if (prologues) {
if (!bundleFileInfo.sources) bundleFileInfo.sources = {};
bundleFileInfo.sources.prologues = prologues;
}
// Store helpes
const helpers = getHelpersFromBundledSourceFiles(bundle);
if (helpers) {
if (!bundleFileInfo.sources) bundleFileInfo.sources = {};
bundleFileInfo.sources.helpers = helpers;
}
}
}
reset();
writer = previousWriter;
}
function writeUnparsedSource(unparsed: UnparsedSource, output: EmitTextWriter) {
const previousWriter = writer;
setWriter(output, /*_sourceMapGenerator*/ undefined);
print(EmitHint.Unspecified, unparsed, /*sourceFile*/ undefined);
reset();
writer = previousWriter;
}
function writeFile(sourceFile: SourceFile, output: EmitTextWriter, sourceMapGenerator: SourceMapGenerator | undefined) {
isOwnFileEmit = true;
const previousWriter = writer;
setWriter(output, sourceMapGenerator);
emitShebangIfNeeded(sourceFile);
emitPrologueDirectivesIfNeeded(sourceFile);
print(EmitHint.SourceFile, sourceFile, sourceFile);
reset();
writer = previousWriter;
}
function beginPrint() {
return ownWriter || (ownWriter = createTextWriter(newLine));
}
function endPrint() {
const text = ownWriter.getText();
ownWriter.clear();
return text;
}
function print(hint: EmitHint, node: Node, sourceFile: SourceFile | undefined) {
if (sourceFile) {
setSourceFile(sourceFile);
}
pipelineEmit(hint, node, /*parenthesizerRule*/ undefined);
}
function setSourceFile(sourceFile: SourceFile | undefined) {
currentSourceFile = sourceFile;
currentLineMap = undefined;
detachedCommentsInfo = undefined;
if (sourceFile) {
setSourceMapSource(sourceFile);
}
}
function setWriter(_writer: EmitTextWriter | undefined, _sourceMapGenerator: SourceMapGenerator | undefined) {
if (_writer && printerOptions.omitTrailingSemicolon) {
_writer = getTrailingSemicolonDeferringWriter(_writer);
}
writer = _writer!; // TODO: GH#18217
sourceMapGenerator = _sourceMapGenerator;
sourceMapsDisabled = !writer || !sourceMapGenerator;
}
function reset() {
nodeIdToGeneratedName = [];
autoGeneratedIdToGeneratedName = [];
generatedNames = new Set();
tempFlagsStack = [];
tempFlags = TempFlags.Auto;
reservedNamesStack = [];
currentSourceFile = undefined;
currentLineMap = undefined;
detachedCommentsInfo = undefined;
setWriter(/*output*/ undefined, /*_sourceMapGenerator*/ undefined);
}
function getCurrentLineMap() {
return currentLineMap || (currentLineMap = getLineStarts(Debug.checkDefined(currentSourceFile)));
}
function emit(node: Node, parenthesizerRule?: (node: Node) => Node): void;
function emit(node: Node | undefined, parenthesizerRule?: (node: Node) => Node): void;
function emit(node: Node | undefined, parenthesizerRule?: (node: Node) => Node) {
if (node === undefined) return;
const prevSourceFileTextKind = recordBundleFileInternalSectionStart(node);
pipelineEmit(EmitHint.Unspecified, node, parenthesizerRule);
recordBundleFileInternalSectionEnd(prevSourceFileTextKind);
}
function emitIdentifierName(node: Identifier): void;
function emitIdentifierName(node: Identifier | undefined): void;
function emitIdentifierName(node: Identifier | undefined) {
if (node === undefined) return;
pipelineEmit(EmitHint.IdentifierName, node, /*parenthesizerRule*/ undefined);
}
function emitExpression(node: Expression, parenthesizerRule?: (node: Expression) => Expression): void;
function emitExpression(node: Expression | undefined, parenthesizerRule?: (node: Expression) => Expression): void;
function emitExpression(node: Expression | undefined, parenthesizerRule?: (node: Expression) => Expression) {
if (node === undefined) return;
pipelineEmit(EmitHint.Expression, node, parenthesizerRule);
}
function emitJsxAttributeValue(node: StringLiteral | JsxExpression): void {
pipelineEmit(isStringLiteral(node) ? EmitHint.JsxAttributeValue : EmitHint.Unspecified, node);
}
function beforeEmitNode(node: Node) {
if (preserveSourceNewlines && (getEmitFlags(node) & EmitFlags.IgnoreSourceNewlines)) {
preserveSourceNewlines = false;
}
}
function afterEmitNode(savedPreserveSourceNewlines: boolean | undefined) {
preserveSourceNewlines = savedPreserveSourceNewlines;
}
function pipelineEmit(emitHint: EmitHint, node: Node, parenthesizerRule?: (node: Node) => Node) {
currentParenthesizerRule = parenthesizerRule;
const pipelinePhase = getPipelinePhase(PipelinePhase.Notification, emitHint, node);
pipelinePhase(emitHint, node);
currentParenthesizerRule = undefined;
}
function shouldEmitComments(node: Node) {
return !commentsDisabled && !isSourceFile(node);
}
function shouldEmitSourceMaps(node: Node) {
return !sourceMapsDisabled &&
!isSourceFile(node) &&
!isInJsonFile(node) &&
!isUnparsedSource(node) &&
!isUnparsedPrepend(node);
}
function getPipelinePhase(phase: PipelinePhase, emitHint: EmitHint, node: Node) {
switch (phase) {
case PipelinePhase.Notification:
if (onEmitNode !== noEmitNotification && (!isEmitNotificationEnabled || isEmitNotificationEnabled(node))) {
return pipelineEmitWithNotification;
}
// falls through
case PipelinePhase.Substitution:
if (substituteNode !== noEmitSubstitution && (lastSubstitution = substituteNode(emitHint, node) || node) !== node) {
if (currentParenthesizerRule) {
lastSubstitution = currentParenthesizerRule(lastSubstitution);
}
return pipelineEmitWithSubstitution;
}
// falls through
case PipelinePhase.Comments:
if (shouldEmitComments(node)) {
return pipelineEmitWithComments;
}
// falls through
case PipelinePhase.SourceMaps:
if (shouldEmitSourceMaps(node)) {
return pipelineEmitWithSourceMaps;
}
// falls through
case PipelinePhase.Emit:
return pipelineEmitWithHint;
default:
return Debug.assertNever(phase);
}
}
function getNextPipelinePhase(currentPhase: PipelinePhase, emitHint: EmitHint, node: Node) {
return getPipelinePhase(currentPhase + 1, emitHint, node);
}
function pipelineEmitWithNotification(hint: EmitHint, node: Node) {
const pipelinePhase = getNextPipelinePhase(PipelinePhase.Notification, hint, node);
onEmitNode(hint, node, pipelinePhase);
}
function pipelineEmitWithHint(hint: EmitHint, node: Node): void {
onBeforeEmitNode?.(node);
if (preserveSourceNewlines) {
const savedPreserveSourceNewlines = preserveSourceNewlines;
beforeEmitNode(node);
pipelineEmitWithHintWorker(hint, node);
afterEmitNode(savedPreserveSourceNewlines);
}
else {
pipelineEmitWithHintWorker(hint, node);
}
onAfterEmitNode?.(node);
// clear the parenthesizer rule as we ascend
currentParenthesizerRule = undefined;
}
function pipelineEmitWithHintWorker(hint: EmitHint, node: Node, allowSnippets = true): void {
if (allowSnippets) {
const snippet = getSnippetElement(node);
if (snippet) {
return emitSnippetNode(hint, node, snippet);
}
}
if (hint === EmitHint.SourceFile) return emitSourceFile(cast(node, isSourceFile));
if (hint === EmitHint.IdentifierName) return emitIdentifier(cast(node, isIdentifier));
if (hint === EmitHint.JsxAttributeValue) return emitLiteral(cast(node, isStringLiteral), /*jsxAttributeEscape*/ true);
if (hint === EmitHint.MappedTypeParameter) return emitMappedTypeParameter(cast(node, isTypeParameterDeclaration));
if (hint === EmitHint.EmbeddedStatement) {
Debug.assertNode(node, isEmptyStatement);
return emitEmptyStatement(/*isEmbeddedStatement*/ true);
}
if (hint === EmitHint.Unspecified) {
switch (node.kind) {
// Pseudo-literals
case SyntaxKind.TemplateHead:
case SyntaxKind.TemplateMiddle:
case SyntaxKind.TemplateTail:
return emitLiteral(node as LiteralExpression, /*jsxAttributeEscape*/ false);
// Identifiers
case SyntaxKind.Identifier:
return emitIdentifier(node as Identifier);
// PrivateIdentifiers
case SyntaxKind.PrivateIdentifier:
return emitPrivateIdentifier(node as PrivateIdentifier);
// Parse tree nodes
// Names
case SyntaxKind.QualifiedName:
return emitQualifiedName(node as QualifiedName);
case SyntaxKind.ComputedPropertyName:
return emitComputedPropertyName(node as ComputedPropertyName);
// Signature elements
case SyntaxKind.TypeParameter:
return emitTypeParameter(node as TypeParameterDeclaration);
case SyntaxKind.Parameter:
return emitParameter(node as ParameterDeclaration);
case SyntaxKind.Decorator:
return emitDecorator(node as Decorator);
// Type members
case SyntaxKind.PropertySignature:
return emitPropertySignature(node as PropertySignature);
case SyntaxKind.PropertyDeclaration:
return emitPropertyDeclaration(node as PropertyDeclaration);
case SyntaxKind.MethodSignature:
return emitMethodSignature(node as MethodSignature);
case SyntaxKind.MethodDeclaration:
return emitMethodDeclaration(node as MethodDeclaration);
case SyntaxKind.ClassStaticBlockDeclaration:
return emitClassStaticBlockDeclaration(node as ClassStaticBlockDeclaration);
case SyntaxKind.Constructor:
return emitConstructor(node as ConstructorDeclaration);
case SyntaxKind.GetAccessor:
case SyntaxKind.SetAccessor:
return emitAccessorDeclaration(node as AccessorDeclaration);
case SyntaxKind.CallSignature:
return emitCallSignature(node as CallSignatureDeclaration);
case SyntaxKind.ConstructSignature:
return emitConstructSignature(node as ConstructSignatureDeclaration);
case SyntaxKind.IndexSignature:
return emitIndexSignature(node as IndexSignatureDeclaration);
// Types
case SyntaxKind.TypePredicate:
return emitTypePredicate(node as TypePredicateNode);
case SyntaxKind.TypeReference:
return emitTypeReference(node as TypeReferenceNode);
case SyntaxKind.FunctionType:
return emitFunctionType(node as FunctionTypeNode);
case SyntaxKind.ConstructorType:
return emitConstructorType(node as ConstructorTypeNode);
case SyntaxKind.TypeQuery:
return emitTypeQuery(node as TypeQueryNode);
case SyntaxKind.TypeLiteral:
return emitTypeLiteral(node as TypeLiteralNode);
case SyntaxKind.ArrayType:
return emitArrayType(node as ArrayTypeNode);
case SyntaxKind.TupleType:
return emitTupleType(node as TupleTypeNode);
case SyntaxKind.OptionalType:
return emitOptionalType(node as OptionalTypeNode);
// SyntaxKind.RestType is handled below
case SyntaxKind.UnionType:
return emitUnionType(node as UnionTypeNode);
case SyntaxKind.IntersectionType:
return emitIntersectionType(node as IntersectionTypeNode);
case SyntaxKind.ConditionalType:
return emitConditionalType(node as ConditionalTypeNode);
case SyntaxKind.InferType:
return emitInferType(node as InferTypeNode);
case SyntaxKind.ParenthesizedType:
return emitParenthesizedType(node as ParenthesizedTypeNode);
case SyntaxKind.ExpressionWithTypeArguments:
return emitExpressionWithTypeArguments(node as ExpressionWithTypeArguments);
case SyntaxKind.ThisType:
return emitThisType();
case SyntaxKind.TypeOperator:
return emitTypeOperator(node as TypeOperatorNode);
case SyntaxKind.IndexedAccessType:
return emitIndexedAccessType(node as IndexedAccessTypeNode);
case SyntaxKind.MappedType:
return emitMappedType(node as MappedTypeNode);
case SyntaxKind.LiteralType:
return emitLiteralType(node as LiteralTypeNode);
case SyntaxKind.NamedTupleMember:
return emitNamedTupleMember(node as NamedTupleMember);
case SyntaxKind.TemplateLiteralType:
return emitTemplateType(node as TemplateLiteralTypeNode);
case SyntaxKind.TemplateLiteralTypeSpan:
return emitTemplateTypeSpan(node as TemplateLiteralTypeSpan);
case SyntaxKind.ImportType:
return emitImportTypeNode(node as ImportTypeNode);
// Binding patterns
case SyntaxKind.ObjectBindingPattern:
return emitObjectBindingPattern(node as ObjectBindingPattern);
case SyntaxKind.ArrayBindingPattern:
return emitArrayBindingPattern(node as ArrayBindingPattern);
case SyntaxKind.BindingElement:
return emitBindingElement(node as BindingElement);
// Misc
case SyntaxKind.TemplateSpan:
return emitTemplateSpan(node as TemplateSpan);
case SyntaxKind.SemicolonClassElement:
return emitSemicolonClassElement();
// Statements
case SyntaxKind.Block:
return emitBlock(node as Block);
case SyntaxKind.VariableStatement:
return emitVariableStatement(node as VariableStatement);
case SyntaxKind.EmptyStatement:
return emitEmptyStatement(/*isEmbeddedStatement*/ false);
case SyntaxKind.ExpressionStatement:
return emitExpressionStatement(node as ExpressionStatement);
case SyntaxKind.IfStatement:
return emitIfStatement(node as IfStatement);
case SyntaxKind.DoStatement:
return emitDoStatement(node as DoStatement);
case SyntaxKind.WhileStatement:
return emitWhileStatement(node as WhileStatement);
case SyntaxKind.ForStatement:
return emitForStatement(node as ForStatement);
case SyntaxKind.ForInStatement:
return emitForInStatement(node as ForInStatement);
case SyntaxKind.ForOfStatement:
return emitForOfStatement(node as ForOfStatement);
case SyntaxKind.ContinueStatement:
return emitContinueStatement(node as ContinueStatement);
case SyntaxKind.BreakStatement:
return emitBreakStatement(node as BreakStatement);
case SyntaxKind.ReturnStatement:
return emitReturnStatement(node as ReturnStatement);
case SyntaxKind.WithStatement:
return emitWithStatement(node as WithStatement);
case SyntaxKind.SwitchStatement:
return emitSwitchStatement(node as SwitchStatement);
case SyntaxKind.LabeledStatement:
return emitLabeledStatement(node as LabeledStatement);
case SyntaxKind.ThrowStatement:
return emitThrowStatement(node as ThrowStatement);
case SyntaxKind.TryStatement:
return emitTryStatement(node as TryStatement);
case SyntaxKind.DebuggerStatement:
return emitDebuggerStatement(node as DebuggerStatement);
// Declarations
case SyntaxKind.VariableDeclaration:
return emitVariableDeclaration(node as VariableDeclaration);
case SyntaxKind.VariableDeclarationList:
return emitVariableDeclarationList(node as VariableDeclarationList);
case SyntaxKind.FunctionDeclaration:
return emitFunctionDeclaration(node as FunctionDeclaration);
case SyntaxKind.ClassDeclaration:
return emitClassDeclaration(node as ClassDeclaration);
case SyntaxKind.InterfaceDeclaration:
return emitInterfaceDeclaration(node as InterfaceDeclaration);
case SyntaxKind.TypeAliasDeclaration:
return emitTypeAliasDeclaration(node as TypeAliasDeclaration);
case SyntaxKind.EnumDeclaration:
return emitEnumDeclaration(node as EnumDeclaration);
case SyntaxKind.ModuleDeclaration:
return emitModuleDeclaration(node as ModuleDeclaration);
case SyntaxKind.ModuleBlock:
return emitModuleBlock(node as ModuleBlock);
case SyntaxKind.CaseBlock:
return emitCaseBlock(node as CaseBlock);
case SyntaxKind.NamespaceExportDeclaration:
return emitNamespaceExportDeclaration(node as NamespaceExportDeclaration);
case SyntaxKind.ImportEqualsDeclaration:
return emitImportEqualsDeclaration(node as ImportEqualsDeclaration);
case SyntaxKind.ImportDeclaration:
return emitImportDeclaration(node as ImportDeclaration);
case SyntaxKind.ImportClause:
return emitImportClause(node as ImportClause);
case SyntaxKind.NamespaceImport:
return emitNamespaceImport(node as NamespaceImport);
case SyntaxKind.NamespaceExport:
return emitNamespaceExport(node as NamespaceExport);
case SyntaxKind.NamedImports:
return emitNamedImports(node as NamedImports);
case SyntaxKind.ImportSpecifier:
return emitImportSpecifier(node as ImportSpecifier);
case SyntaxKind.ExportAssignment:
return emitExportAssignment(node as ExportAssignment);
case SyntaxKind.ExportDeclaration:
return emitExportDeclaration(node as ExportDeclaration);
case SyntaxKind.NamedExports:
return emitNamedExports(node as NamedExports);
case SyntaxKind.ExportSpecifier:
return emitExportSpecifier(node as ExportSpecifier);
case SyntaxKind.AssertClause:
return emitAssertClause(node as AssertClause);
case SyntaxKind.AssertEntry:
return emitAssertEntry(node as AssertEntry);
case SyntaxKind.MissingDeclaration:
return;
// Module references
case SyntaxKind.ExternalModuleReference:
return emitExternalModuleReference(node as ExternalModuleReference);
// JSX (non-expression)
case SyntaxKind.JsxText:
return emitJsxText(node as JsxText);
case SyntaxKind.JsxOpeningElement:
case SyntaxKind.JsxOpeningFragment:
return emitJsxOpeningElementOrFragment(node as JsxOpeningElement);
case SyntaxKind.JsxClosingElement:
case SyntaxKind.JsxClosingFragment:
return emitJsxClosingElementOrFragment(node as JsxClosingElement);
case SyntaxKind.JsxAttribute:
return emitJsxAttribute(node as JsxAttribute);
case SyntaxKind.JsxAttributes:
return emitJsxAttributes(node as JsxAttributes);
case SyntaxKind.JsxSpreadAttribute:
return emitJsxSpreadAttribute(node as JsxSpreadAttribute);
case SyntaxKind.JsxExpression:
return emitJsxExpression(node as JsxExpression);
// Clauses
case SyntaxKind.CaseClause:
return emitCaseClause(node as CaseClause);
case SyntaxKind.DefaultClause:
return emitDefaultClause(node as DefaultClause);
case SyntaxKind.HeritageClause:
return emitHeritageClause(node as HeritageClause);
case SyntaxKind.CatchClause:
return emitCatchClause(node as CatchClause);
// Property assignments
case SyntaxKind.PropertyAssignment:
return emitPropertyAssignment(node as PropertyAssignment);
case SyntaxKind.ShorthandPropertyAssignment:
return emitShorthandPropertyAssignment(node as ShorthandPropertyAssignment);
case SyntaxKind.SpreadAssignment:
return emitSpreadAssignment(node as SpreadAssignment);
// Enum
case SyntaxKind.EnumMember:
return emitEnumMember(node as EnumMember);
// Unparsed
case SyntaxKind.UnparsedPrologue:
return writeUnparsedNode(node as UnparsedNode);
case SyntaxKind.UnparsedSource:
case SyntaxKind.UnparsedPrepend:
return emitUnparsedSourceOrPrepend(node as UnparsedSource);
case SyntaxKind.UnparsedText:
case SyntaxKind.UnparsedInternalText:
return emitUnparsedTextLike(node as UnparsedTextLike);
case SyntaxKind.UnparsedSyntheticReference:
return emitUnparsedSyntheticReference(node as UnparsedSyntheticReference);
// Top-level nodes
case SyntaxKind.SourceFile:
return emitSourceFile(node as SourceFile);
case SyntaxKind.Bundle:
return Debug.fail("Bundles should be printed using printBundle");
// SyntaxKind.UnparsedSource (handled above)
case SyntaxKind.InputFiles:
return Debug.fail("InputFiles should not be printed");
// JSDoc nodes (only used in codefixes currently)
case SyntaxKind.JSDocTypeExpression:
return emitJSDocTypeExpression(node as JSDocTypeExpression);
case SyntaxKind.JSDocNameReference:
return emitJSDocNameReference(node as JSDocNameReference);
case SyntaxKind.JSDocAllType:
return writePunctuation("*");
case SyntaxKind.JSDocUnknownType:
return writePunctuation("?");
case SyntaxKind.JSDocNullableType:
return emitJSDocNullableType(node as JSDocNullableType);
case SyntaxKind.JSDocNonNullableType:
return emitJSDocNonNullableType(node as JSDocNonNullableType);
case SyntaxKind.JSDocOptionalType:
return emitJSDocOptionalType(node as JSDocOptionalType);
case SyntaxKind.JSDocFunctionType:
return emitJSDocFunctionType(node as JSDocFunctionType);
case SyntaxKind.RestType:
case SyntaxKind.JSDocVariadicType:
return emitRestOrJSDocVariadicType(node as RestTypeNode | JSDocVariadicType);
case SyntaxKind.JSDocNamepathType:
return;
case SyntaxKind.JSDoc:
return emitJSDoc(node as JSDoc);
case SyntaxKind.JSDocTypeLiteral:
return emitJSDocTypeLiteral(node as JSDocTypeLiteral);
case SyntaxKind.JSDocSignature:
return emitJSDocSignature(node as JSDocSignature);
case SyntaxKind.JSDocTag:
case SyntaxKind.JSDocClassTag:
case SyntaxKind.JSDocOverrideTag:
return emitJSDocSimpleTag(node as JSDocTag);
case SyntaxKind.JSDocAugmentsTag:
case SyntaxKind.JSDocImplementsTag:
return emitJSDocHeritageTag(node as JSDocImplementsTag | JSDocAugmentsTag);
case SyntaxKind.JSDocAuthorTag:
case SyntaxKind.JSDocDeprecatedTag:
return;
// SyntaxKind.JSDocClassTag (see JSDocTag, above)
case SyntaxKind.JSDocPublicTag:
case SyntaxKind.JSDocPrivateTag:
case SyntaxKind.JSDocProtectedTag:
case SyntaxKind.JSDocReadonlyTag:
return;
case SyntaxKind.JSDocCallbackTag:
return emitJSDocCallbackTag(node as JSDocCallbackTag);
// SyntaxKind.JSDocEnumTag (see below)
case SyntaxKind.JSDocParameterTag:
case SyntaxKind.JSDocPropertyTag:
return emitJSDocPropertyLikeTag(node as JSDocPropertyLikeTag);
case SyntaxKind.JSDocEnumTag:
case SyntaxKind.JSDocReturnTag:
case SyntaxKind.JSDocThisTag:
case SyntaxKind.JSDocTypeTag:
return emitJSDocSimpleTypedTag(node as JSDocTypeTag);
case SyntaxKind.JSDocTemplateTag:
return emitJSDocTemplateTag(node as JSDocTemplateTag);
case SyntaxKind.JSDocTypedefTag:
return emitJSDocTypedefTag(node as JSDocTypedefTag);
case SyntaxKind.JSDocSeeTag:
return emitJSDocSeeTag(node as JSDocSeeTag);
// SyntaxKind.JSDocPropertyTag (see JSDocParameterTag, above)
// Transformation nodes
case SyntaxKind.NotEmittedStatement:
case SyntaxKind.EndOfDeclarationMarker:
case SyntaxKind.MergeDeclarationMarker:
return;
}
if (isExpression(node)) {
hint = EmitHint.Expression;
if (substituteNode !== noEmitSubstitution) {
const substitute = substituteNode(hint, node) || node;
if (substitute !== node) {
node = substitute;
if (currentParenthesizerRule) {
node = currentParenthesizerRule(node);
}
}
}
}
}
if (hint === EmitHint.Expression) {
switch (node.kind) {
// Literals
case SyntaxKind.NumericLiteral:
case SyntaxKind.BigIntLiteral:
return emitNumericOrBigIntLiteral(node as NumericLiteral | BigIntLiteral);
case SyntaxKind.StringLiteral:
case SyntaxKind.RegularExpressionLiteral:
case SyntaxKind.NoSubstitutionTemplateLiteral:
return emitLiteral(node as LiteralExpression, /*jsxAttributeEscape*/ false);
// Identifiers
case SyntaxKind.Identifier:
return emitIdentifier(node as Identifier);
case SyntaxKind.PrivateIdentifier:
return emitPrivateIdentifier(node as PrivateIdentifier);
// Expressions
case SyntaxKind.ArrayLiteralExpression:
return emitArrayLiteralExpression(node as ArrayLiteralExpression);
case SyntaxKind.ObjectLiteralExpression:
return emitObjectLiteralExpression(node as ObjectLiteralExpression);
case SyntaxKind.PropertyAccessExpression:
return emitPropertyAccessExpression(node as PropertyAccessExpression);
case SyntaxKind.ElementAccessExpression:
return emitElementAccessExpression(node as ElementAccessExpression);
case SyntaxKind.CallExpression:
return emitCallExpression(node as CallExpression);
case SyntaxKind.NewExpression:
return emitNewExpression(node as NewExpression);
case SyntaxKind.TaggedTemplateExpression:
return emitTaggedTemplateExpression(node as TaggedTemplateExpression);
case SyntaxKind.TypeAssertionExpression:
return emitTypeAssertionExpression(node as TypeAssertion);
case SyntaxKind.ParenthesizedExpression:
return emitParenthesizedExpression(node as ParenthesizedExpression);
case SyntaxKind.FunctionExpression:
return emitFunctionExpression(node as FunctionExpression);
case SyntaxKind.ArrowFunction:
return emitArrowFunction(node as ArrowFunction);
case SyntaxKind.DeleteExpression:
return emitDeleteExpression(node as DeleteExpression);
case SyntaxKind.TypeOfExpression:
return emitTypeOfExpression(node as TypeOfExpression);
case SyntaxKind.VoidExpression:
return emitVoidExpression(node as VoidExpression);
case SyntaxKind.AwaitExpression:
return emitAwaitExpression(node as AwaitExpression);
case SyntaxKind.PrefixUnaryExpression:
return emitPrefixUnaryExpression(node as PrefixUnaryExpression);
case SyntaxKind.PostfixUnaryExpression:
return emitPostfixUnaryExpression(node as PostfixUnaryExpression);
case SyntaxKind.BinaryExpression:
return emitBinaryExpression(node as BinaryExpression);
case SyntaxKind.ConditionalExpression:
return emitConditionalExpression(node as ConditionalExpression);
case SyntaxKind.TemplateExpression:
return emitTemplateExpression(node as TemplateExpression);
case SyntaxKind.YieldExpression:
return emitYieldExpression(node as YieldExpression);
case SyntaxKind.SpreadElement:
return emitSpreadElement(node as SpreadElement);
case SyntaxKind.ClassExpression:
return emitClassExpression(node as ClassExpression);
case SyntaxKind.OmittedExpression:
return;
case SyntaxKind.AsExpression:
return emitAsExpression(node as AsExpression);
case SyntaxKind.NonNullExpression:
return emitNonNullExpression(node as NonNullExpression);
case SyntaxKind.ExpressionWithTypeArguments:
return emitExpressionWithTypeArguments(node as ExpressionWithTypeArguments);
case SyntaxKind.MetaProperty:
return emitMetaProperty(node as MetaProperty);
case SyntaxKind.SyntheticExpression:
return Debug.fail("SyntheticExpression should never be printed.");
// JSX
case SyntaxKind.JsxElement:
return emitJsxElement(node as JsxElement);
case SyntaxKind.JsxSelfClosingElement:
return emitJsxSelfClosingElement(node as JsxSelfClosingElement);
case SyntaxKind.JsxFragment:
return emitJsxFragment(node as JsxFragment);
// Synthesized list
case SyntaxKind.SyntaxList:
return Debug.fail("SyntaxList should not be printed");
// Transformation nodes
case SyntaxKind.NotEmittedStatement:
return;
case SyntaxKind.PartiallyEmittedExpression:
return emitPartiallyEmittedExpression(node as PartiallyEmittedExpression);
case SyntaxKind.CommaListExpression:
return emitCommaList(node as CommaListExpression);
case SyntaxKind.MergeDeclarationMarker:
case SyntaxKind.EndOfDeclarationMarker:
return;
case SyntaxKind.SyntheticReferenceExpression:
return Debug.fail("SyntheticReferenceExpression should not be printed");
}
}
if (isKeyword(node.kind)) return writeTokenNode(node, writeKeyword);
if (isTokenKind(node.kind)) return writeTokenNode(node, writePunctuation);
Debug.fail(`Unhandled SyntaxKind: ${Debug.formatSyntaxKind(node.kind)}.`);
}
function emitMappedTypeParameter(node: TypeParameterDeclaration): void {
emit(node.name);
writeSpace();
writeKeyword("in");
writeSpace();
emit(node.constraint);
}
function pipelineEmitWithSubstitution(hint: EmitHint, node: Node) {
const pipelinePhase = getNextPipelinePhase(PipelinePhase.Substitution, hint, node);
Debug.assertIsDefined(lastSubstitution);
node = lastSubstitution;
lastSubstitution = undefined;
pipelinePhase(hint, node);
}
function getHelpersFromBundledSourceFiles(bundle: Bundle): string[] | undefined {
let result: string[] | undefined;
if (moduleKind === ModuleKind.None || printerOptions.noEmitHelpers) {
return undefined;
}
const bundledHelpers = new Map<string, boolean>();
for (const sourceFile of bundle.sourceFiles) {
const shouldSkip = getExternalHelpersModuleName(sourceFile) !== undefined;
const helpers = getSortedEmitHelpers(sourceFile);
if (!helpers) continue;
for (const helper of helpers) {
if (!helper.scoped && !shouldSkip && !bundledHelpers.get(helper.name)) {
bundledHelpers.set(helper.name, true);
(result || (result = [])).push(helper.name);
}
}
}
return result;
}
function emitHelpers(node: Node) {
let helpersEmitted = false;
const bundle = node.kind === SyntaxKind.Bundle ? node as Bundle : undefined;
if (bundle && moduleKind === ModuleKind.None) {
return;
}
const numPrepends = bundle ? bundle.prepends.length : 0;
const numNodes = bundle ? bundle.sourceFiles.length + numPrepends : 1;
for (let i = 0; i < numNodes; i++) {
const currentNode = bundle ? i < numPrepends ? bundle.prepends[i] : bundle.sourceFiles[i - numPrepends] : node;
const sourceFile = isSourceFile(currentNode) ? currentNode : isUnparsedSource(currentNode) ? undefined : currentSourceFile;
const shouldSkip = printerOptions.noEmitHelpers || (!!sourceFile && hasRecordedExternalHelpers(sourceFile));
const shouldBundle = (isSourceFile(currentNode) || isUnparsedSource(currentNode)) && !isOwnFileEmit;
const helpers = isUnparsedSource(currentNode) ? currentNode.helpers : getSortedEmitHelpers(currentNode);
if (helpers) {
for (const helper of helpers) {
if (!helper.scoped) {
// Skip the helper if it can be skipped and the noEmitHelpers compiler
// option is set, or if it can be imported and the importHelpers compiler
// option is set.
if (shouldSkip) continue;
// Skip the helper if it can be bundled but hasn't already been emitted and we
// are emitting a bundled module.
if (shouldBundle) {
if (bundledHelpers.get(helper.name)) {
continue;
}
bundledHelpers.set(helper.name, true);
}
}
else if (bundle) {
// Skip the helper if it is scoped and we are emitting bundled helpers
continue;
}
const pos = getTextPosWithWriteLine();
if (typeof helper.text === "string") {
writeLines(helper.text);
}
else {
writeLines(helper.text(makeFileLevelOptimisticUniqueName));
}
if (bundleFileInfo) bundleFileInfo.sections.push({ pos, end: writer.getTextPos(), kind: BundleFileSectionKind.EmitHelpers, data: helper.name });
helpersEmitted = true;
}
}
}
return helpersEmitted;
}
function getSortedEmitHelpers(node: Node) {
const helpers = getEmitHelpers(node);
return helpers && stableSort(helpers, compareEmitHelpers);
}
//
// Literals/Pseudo-literals
//
// SyntaxKind.NumericLiteral
// SyntaxKind.BigIntLiteral
function emitNumericOrBigIntLiteral(node: NumericLiteral | BigIntLiteral) {
emitLiteral(node, /*jsxAttributeEscape*/ false);
}
// SyntaxKind.StringLiteral
// SyntaxKind.RegularExpressionLiteral
// SyntaxKind.NoSubstitutionTemplateLiteral
// SyntaxKind.TemplateHead
// SyntaxKind.TemplateMiddle
// SyntaxKind.TemplateTail
function emitLiteral(node: LiteralLikeNode, jsxAttributeEscape: boolean) {
const text = getLiteralTextOfNode(node, printerOptions.neverAsciiEscape, jsxAttributeEscape);
if ((printerOptions.sourceMap || printerOptions.inlineSourceMap)
&& (node.kind === SyntaxKind.StringLiteral || isTemplateLiteralKind(node.kind))) {
writeLiteral(text);
}
else {
// Quick info expects all literals to be called with writeStringLiteral, as there's no specific type for numberLiterals
writeStringLiteral(text);
}
}
// SyntaxKind.UnparsedSource
// SyntaxKind.UnparsedPrepend
function emitUnparsedSourceOrPrepend(unparsed: UnparsedSource | UnparsedPrepend) {
for (const text of unparsed.texts) {
writeLine();
emit(text);
}
}
// SyntaxKind.UnparsedPrologue
// SyntaxKind.UnparsedText
// SyntaxKind.UnparsedInternal
// SyntaxKind.UnparsedSyntheticReference
function writeUnparsedNode(unparsed: UnparsedNode) {
writer.rawWrite(unparsed.parent.text.substring(unparsed.pos, unparsed.end));
}
// SyntaxKind.UnparsedText
// SyntaxKind.UnparsedInternal
function emitUnparsedTextLike(unparsed: UnparsedTextLike) {
const pos = getTextPosWithWriteLine();
writeUnparsedNode(unparsed);
if (bundleFileInfo) {
updateOrPushBundleFileTextLike(
pos,
writer.getTextPos(),
unparsed.kind === SyntaxKind.UnparsedText ?
BundleFileSectionKind.Text :
BundleFileSectionKind.Internal
);
}
}
// SyntaxKind.UnparsedSyntheticReference
function emitUnparsedSyntheticReference(unparsed: UnparsedSyntheticReference) {
const pos = getTextPosWithWriteLine();
writeUnparsedNode(unparsed);
if (bundleFileInfo) {
const section = clone(unparsed.section);
section.pos = pos;
section.end = writer.getTextPos();
bundleFileInfo.sections.push(section);
}
}
//
// Snippet Elements
//
function emitSnippetNode(hint: EmitHint, node: Node, snippet: SnippetElement) {
switch (snippet.kind) {
case SnippetKind.Placeholder:
emitPlaceholder(hint, node, snippet);
break;
case SnippetKind.TabStop:
emitTabStop(hint, node, snippet);
break;
}
}
function emitPlaceholder(hint: EmitHint, node: Node, snippet: Placeholder) {
nonEscapingWrite(`\$\{${snippet.order}:`); // `${2:`
pipelineEmitWithHintWorker(hint, node, /*allowSnippets*/ false); // `...`
nonEscapingWrite(`\}`); // `}`
// `${2:...}`
}
function emitTabStop(hint: EmitHint, node: Node, snippet: TabStop) {
// A tab stop should only be attached to an empty node, i.e. a node that doesn't emit any text.
Debug.assert(node.kind === SyntaxKind.EmptyStatement,
`A tab stop cannot be attached to a node of kind ${Debug.formatSyntaxKind(node.kind)}.`);
Debug.assert(hint !== EmitHint.EmbeddedStatement,
`A tab stop cannot be attached to an embedded statement.`);
nonEscapingWrite(`\$${snippet.order}`);
}
//
// Identifiers
//
function emitIdentifier(node: Identifier) {
const writeText = node.symbol ? writeSymbol : write;
writeText(getTextOfNode(node, /*includeTrivia*/ false), node.symbol);
emitList(node, node.typeArguments, ListFormat.TypeParameters); // Call emitList directly since it could be an array of TypeParameterDeclarations _or_ type arguments
}
//
// Names
//
function emitPrivateIdentifier(node: PrivateIdentifier) {
const writeText = node.symbol ? writeSymbol : write;
writeText(getTextOfNode(node, /*includeTrivia*/ false), node.symbol);
}
function emitQualifiedName(node: QualifiedName) {
emitEntityName(node.left);
writePunctuation(".");
emit(node.right);
}
function emitEntityName(node: EntityName) {
if (node.kind === SyntaxKind.Identifier) {
emitExpression(node);
}
else {
emit(node);
}
}
function emitComputedPropertyName(node: ComputedPropertyName) {
writePunctuation("[");
emitExpression(node.expression, parenthesizer.parenthesizeExpressionOfComputedPropertyName);
writePunctuation("]");
}
//
// Signature elements
//
function emitTypeParameter(node: TypeParameterDeclaration) {
emitModifiers(node, node.modifiers);
emit(node.name);
if (node.constraint) {
writeSpace();
writeKeyword("extends");
writeSpace();
emit(node.constraint);
}
if (node.default) {
writeSpace();
writeOperator("=");
writeSpace();
emit(node.default);
}
}
function emitParameter(node: ParameterDeclaration) {
emitDecoratorsAndModifiers(node, node.modifiers);
emit(node.dotDotDotToken);
emitNodeWithWriter(node.name, writeParameter);
emit(node.questionToken);
if (node.parent && node.parent.kind === SyntaxKind.JSDocFunctionType && !node.name) {
emit(node.type);
}
else {
emitTypeAnnotation(node.type);
}
// The comment position has to fallback to any present node within the parameterdeclaration because as it turns out, the parser can make parameter declarations with _just_ an initializer.
emitInitializer(node.initializer, node.type ? node.type.end : node.questionToken ? node.questionToken.end : node.name ? node.name.end : node.modifiers ? node.modifiers.end : node.pos, node, parenthesizer.parenthesizeExpressionForDisallowedComma);
}
function emitDecorator(decorator: Decorator) {
writePunctuation("@");
emitExpression(decorator.expression, parenthesizer.parenthesizeLeftSideOfAccess);
}
//
// Type members
//
function emitPropertySignature(node: PropertySignature) {
emitModifiers(node, node.modifiers);
emitNodeWithWriter(node.name, writeProperty);
emit(node.questionToken);
emitTypeAnnotation(node.type);
writeTrailingSemicolon();
}
function emitPropertyDeclaration(node: PropertyDeclaration) {
emitDecoratorsAndModifiers(node, node.modifiers);
emit(node.name);
emit(node.questionToken);
emit(node.exclamationToken);
emitTypeAnnotation(node.type);
emitInitializer(node.initializer, node.type ? node.type.end : node.questionToken ? node.questionToken.end : node.name.end, node);
writeTrailingSemicolon();
}
function emitMethodSignature(node: MethodSignature) {
pushNameGenerationScope(node);
emitModifiers(node, node.modifiers);
emit(node.name);
emit(node.questionToken);
emitTypeParameters(node, node.typeParameters);
emitParameters(node, node.parameters);
emitTypeAnnotation(node.type);
writeTrailingSemicolon();
popNameGenerationScope(node);
}
function emitMethodDeclaration(node: MethodDeclaration) {
emitDecoratorsAndModifiers(node, node.modifiers);
emit(node.asteriskToken);
emit(node.name);
emit(node.questionToken);
emitSignatureAndBody(node, emitSignatureHead);
}
function emitClassStaticBlockDeclaration(node: ClassStaticBlockDeclaration) {
writeKeyword("static");
emitBlockFunctionBody(node.body);
}
function emitConstructor(node: ConstructorDeclaration) {
emitModifiers(node, node.modifiers);
writeKeyword("constructor");
emitSignatureAndBody(node, emitSignatureHead);
}
function emitAccessorDeclaration(node: AccessorDeclaration) {
emitDecoratorsAndModifiers(node, node.modifiers);
writeKeyword(node.kind === SyntaxKind.GetAccessor ? "get" : "set");
writeSpace();
emit(node.name);
emitSignatureAndBody(node, emitSignatureHead);
}
function emitCallSignature(node: CallSignatureDeclaration) {
pushNameGenerationScope(node);
emitTypeParameters(node, node.typeParameters);
emitParameters(node, node.parameters);
emitTypeAnnotation(node.type);
writeTrailingSemicolon();
popNameGenerationScope(node);
}
function emitConstructSignature(node: ConstructSignatureDeclaration) {
pushNameGenerationScope(node);
writeKeyword("new");
writeSpace();
emitTypeParameters(node, node.typeParameters);
emitParameters(node, node.parameters);
emitTypeAnnotation(node.type);
writeTrailingSemicolon();
popNameGenerationScope(node);
}
function emitIndexSignature(node: IndexSignatureDeclaration) {
emitModifiers(node, node.modifiers);
emitParametersForIndexSignature(node, node.parameters);
emitTypeAnnotation(node.type);
writeTrailingSemicolon();
}
function emitTemplateTypeSpan(node: TemplateLiteralTypeSpan) {
emit(node.type);
emit(node.literal);
}
function emitSemicolonClassElement() {
writeTrailingSemicolon();
}
//
// Types
//
function emitTypePredicate(node: TypePredicateNode) {
if (node.assertsModifier) {
emit(node.assertsModifier);
writeSpace();
}
emit(node.parameterName);
if (node.type) {
writeSpace();
writeKeyword("is");
writeSpace();
emit(node.type);
}
}
function emitTypeReference(node: TypeReferenceNode) {
emit(node.typeName);
emitTypeArguments(node, node.typeArguments);
}
function emitFunctionType(node: FunctionTypeNode) {
pushNameGenerationScope(node);
emitTypeParameters(node, node.typeParameters);
emitParametersForArrow(node, node.parameters);
writeSpace();
writePunctuation("=>");
writeSpace();
emit(node.type);
popNameGenerationScope(node);
}
function emitJSDocFunctionType(node: JSDocFunctionType) {
writeKeyword("function");
emitParameters(node, node.parameters);
writePunctuation(":");
emit(node.type);
}
function emitJSDocNullableType(node: JSDocNullableType) {
writePunctuation("?");
emit(node.type);
}
function emitJSDocNonNullableType(node: JSDocNonNullableType) {
writePunctuation("!");
emit(node.type);
}
function emitJSDocOptionalType(node: JSDocOptionalType) {
emit(node.type);
writePunctuation("=");
}
function emitConstructorType(node: ConstructorTypeNode) {
pushNameGenerationScope(node);
emitModifiers(node, node.modifiers);
writeKeyword("new");
writeSpace();
emitTypeParameters(node, node.typeParameters);
emitParameters(node, node.parameters);
writeSpace();
writePunctuation("=>");
writeSpace();
emit(node.type);
popNameGenerationScope(node);
}
function emitTypeQuery(node: TypeQueryNode) {
writeKeyword("typeof");
writeSpace();
emit(node.exprName);
emitTypeArguments(node, node.typeArguments);
}
function emitTypeLiteral(node: TypeLiteralNode) {
writePunctuation("{");
const flags = getEmitFlags(node) & EmitFlags.SingleLine ? ListFormat.SingleLineTypeLiteralMembers : ListFormat.MultiLineTypeLiteralMembers;
emitList(node, node.members, flags | ListFormat.NoSpaceIfEmpty);
writePunctuation("}");
}
function emitArrayType(node: ArrayTypeNode) {
emit(node.elementType, parenthesizer.parenthesizeNonArrayTypeOfPostfixType);
writePunctuation("[");
writePunctuation("]");
}
function emitRestOrJSDocVariadicType(node: RestTypeNode | JSDocVariadicType) {
writePunctuation("...");
emit(node.type);
}
function emitTupleType(node: TupleTypeNode) {
emitTokenWithComment(SyntaxKind.OpenBracketToken, node.pos, writePunctuation, node);
const flags = getEmitFlags(node) & EmitFlags.SingleLine ? ListFormat.SingleLineTupleTypeElements : ListFormat.MultiLineTupleTypeElements;
emitList(node, node.elements, flags | ListFormat.NoSpaceIfEmpty, parenthesizer.parenthesizeElementTypeOfTupleType);
emitTokenWithComment(SyntaxKind.CloseBracketToken, node.elements.end, writePunctuation, node);
}
function emitNamedTupleMember(node: NamedTupleMember) {
emit(node.dotDotDotToken);
emit(node.name);
emit(node.questionToken);
emitTokenWithComment(SyntaxKind.ColonToken, node.name.end, writePunctuation, node);
writeSpace();
emit(node.type);
}
function emitOptionalType(node: OptionalTypeNode) {
emit(node.type, parenthesizer.parenthesizeTypeOfOptionalType);
writePunctuation("?");
}
function emitUnionType(node: UnionTypeNode) {
emitList(node, node.types, ListFormat.UnionTypeConstituents, parenthesizer.parenthesizeConstituentTypeOfUnionType);
}
function emitIntersectionType(node: IntersectionTypeNode) {
emitList(node, node.types, ListFormat.IntersectionTypeConstituents, parenthesizer.parenthesizeConstituentTypeOfIntersectionType);
}
function emitConditionalType(node: ConditionalTypeNode) {
emit(node.checkType, parenthesizer.parenthesizeCheckTypeOfConditionalType);
writeSpace();
writeKeyword("extends");
writeSpace();
emit(node.extendsType, parenthesizer.parenthesizeExtendsTypeOfConditionalType);
writeSpace();
writePunctuation("?");
writeSpace();
emit(node.trueType);
writeSpace();
writePunctuation(":");
writeSpace();
emit(node.falseType);
}
function emitInferType(node: InferTypeNode) {
writeKeyword("infer");
writeSpace();
emit(node.typeParameter);
}
function emitParenthesizedType(node: ParenthesizedTypeNode) {
writePunctuation("(");
emit(node.type);
writePunctuation(")");
}
function emitThisType() {
writeKeyword("this");
}
function emitTypeOperator(node: TypeOperatorNode) {
writeTokenText(node.operator, writeKeyword);
writeSpace();
const parenthesizerRule = node.operator === SyntaxKind.ReadonlyKeyword ?
parenthesizer.parenthesizeOperandOfReadonlyTypeOperator :
parenthesizer.parenthesizeOperandOfTypeOperator;
emit(node.type, parenthesizerRule);
}
function emitIndexedAccessType(node: IndexedAccessTypeNode) {
emit(node.objectType, parenthesizer.parenthesizeNonArrayTypeOfPostfixType);
writePunctuation("[");
emit(node.indexType);
writePunctuation("]");
}
function emitMappedType(node: MappedTypeNode) {
const emitFlags = getEmitFlags(node);
writePunctuation("{");
if (emitFlags & EmitFlags.SingleLine) {
writeSpace();
}
else {
writeLine();
increaseIndent();
}
if (node.readonlyToken) {
emit(node.readonlyToken);
if (node.readonlyToken.kind !== SyntaxKind.ReadonlyKeyword) {
writeKeyword("readonly");
}
writeSpace();
}
writePunctuation("[");
pipelineEmit(EmitHint.MappedTypeParameter, node.typeParameter);
if (node.nameType) {
writeSpace();
writeKeyword("as");
writeSpace();
emit(node.nameType);
}
writePunctuation("]");
if (node.questionToken) {
emit(node.questionToken);
if (node.questionToken.kind !== SyntaxKind.QuestionToken) {
writePunctuation("?");
}
}
writePunctuation(":");
writeSpace();
emit(node.type);
writeTrailingSemicolon();
if (emitFlags & EmitFlags.SingleLine) {
writeSpace();
}
else {
writeLine();
decreaseIndent();
}
emitList(node, node.members, ListFormat.PreserveLines);
writePunctuation("}");
}
function emitLiteralType(node: LiteralTypeNode) {
emitExpression(node.literal);
}
function emitTemplateType(node: TemplateLiteralTypeNode) {
emit(node.head);
emitList(node, node.templateSpans, ListFormat.TemplateExpressionSpans);
}
function emitImportTypeNode(node: ImportTypeNode) {
if (node.isTypeOf) {
writeKeyword("typeof");
writeSpace();
}
writeKeyword("import");
writePunctuation("(");
emit(node.argument);
if (node.assertions) {
writePunctuation(",");
writeSpace();
writePunctuation("{");
writeSpace();
writeKeyword("assert");
writePunctuation(":");
writeSpace();
const elements = node.assertions.assertClause.elements;
emitList(node.assertions.assertClause, elements, ListFormat.ImportClauseEntries);
writeSpace();
writePunctuation("}");
}
writePunctuation(")");
if (node.qualifier) {
writePunctuation(".");
emit(node.qualifier);
}
emitTypeArguments(node, node.typeArguments);
}
//
// Binding patterns
//
function emitObjectBindingPattern(node: ObjectBindingPattern) {
writePunctuation("{");
emitList(node, node.elements, ListFormat.ObjectBindingPatternElements);
writePunctuation("}");
}
function emitArrayBindingPattern(node: ArrayBindingPattern) {
writePunctuation("[");
emitList(node, node.elements, ListFormat.ArrayBindingPatternElements);
writePunctuation("]");
}
function emitBindingElement(node: BindingElement) {
emit(node.dotDotDotToken);
if (node.propertyName) {
emit(node.propertyName);
writePunctuation(":");
writeSpace();
}
emit(node.name);
emitInitializer(node.initializer, node.name.end, node, parenthesizer.parenthesizeExpressionForDisallowedComma);
}
//
// Expressions
//
function emitArrayLiteralExpression(node: ArrayLiteralExpression) {
const elements = node.elements;
const preferNewLine = node.multiLine ? ListFormat.PreferNewLine : ListFormat.None;
emitExpressionList(node, elements, ListFormat.ArrayLiteralExpressionElements | preferNewLine, parenthesizer.parenthesizeExpressionForDisallowedComma);
}
function emitObjectLiteralExpression(node: ObjectLiteralExpression) {
forEach(node.properties, generateMemberNames);
const indentedFlag = getEmitFlags(node) & EmitFlags.Indented;
if (indentedFlag) {
increaseIndent();
}
const preferNewLine = node.multiLine ? ListFormat.PreferNewLine : ListFormat.None;
const allowTrailingComma = currentSourceFile && currentSourceFile.languageVersion >= ScriptTarget.ES5 && !isJsonSourceFile(currentSourceFile) ? ListFormat.AllowTrailingComma : ListFormat.None;
emitList(node, node.properties, ListFormat.ObjectLiteralExpressionProperties | allowTrailingComma | preferNewLine);
if (indentedFlag) {
decreaseIndent();
}
}
function emitPropertyAccessExpression(node: PropertyAccessExpression) {
emitExpression(node.expression, parenthesizer.parenthesizeLeftSideOfAccess);
const token = node.questionDotToken || setTextRangePosEnd(factory.createToken(SyntaxKind.DotToken) as DotToken, node.expression.end, node.name.pos);
const linesBeforeDot = getLinesBetweenNodes(node, node.expression, token);
const linesAfterDot = getLinesBetweenNodes(node, token, node.name);
writeLinesAndIndent(linesBeforeDot, /*writeSpaceIfNotIndenting*/ false);
const shouldEmitDotDot =
token.kind !== SyntaxKind.QuestionDotToken &&
mayNeedDotDotForPropertyAccess(node.expression) &&
!writer.hasTrailingComment() &&
!writer.hasTrailingWhitespace();
if (shouldEmitDotDot) {
writePunctuation(".");
}
if (node.questionDotToken) {
emit(token);
}
else {
emitTokenWithComment(token.kind, node.expression.end, writePunctuation, node);
}
writeLinesAndIndent(linesAfterDot, /*writeSpaceIfNotIndenting*/ false);
emit(node.name);
decreaseIndentIf(linesBeforeDot, linesAfterDot);
}
// 1..toString is a valid property access, emit a dot after the literal
// Also emit a dot if expression is a integer const enum value - it will appear in generated code as numeric literal
function mayNeedDotDotForPropertyAccess(expression: Expression) {
expression = skipPartiallyEmittedExpressions(expression);
if (isNumericLiteral(expression)) {
// check if numeric literal is a decimal literal that was originally written with a dot
const text = getLiteralTextOfNode(expression as LiteralExpression, /*neverAsciiEscape*/ true, /*jsxAttributeEscape*/ false);
// If he number will be printed verbatim and it doesn't already contain a dot, add one
// if the expression doesn't have any comments that will be emitted.
return !expression.numericLiteralFlags && !stringContains(text, tokenToString(SyntaxKind.DotToken)!);
}
else if (isAccessExpression(expression)) {
// check if constant enum value is integer
const constantValue = getConstantValue(expression);
// isFinite handles cases when constantValue is undefined
return typeof constantValue === "number" && isFinite(constantValue)
&& Math.floor(constantValue) === constantValue;
}
}
function emitElementAccessExpression(node: ElementAccessExpression) {
emitExpression(node.expression, parenthesizer.parenthesizeLeftSideOfAccess);
emit(node.questionDotToken);
emitTokenWithComment(SyntaxKind.OpenBracketToken, node.expression.end, writePunctuation, node);
emitExpression(node.argumentExpression);
emitTokenWithComment(SyntaxKind.CloseBracketToken, node.argumentExpression.end, writePunctuation, node);
}
function emitCallExpression(node: CallExpression) {
const indirectCall = getEmitFlags(node) & EmitFlags.IndirectCall;
if (indirectCall) {
writePunctuation("(");
writeLiteral("0");
writePunctuation(",");
writeSpace();
}
emitExpression(node.expression, parenthesizer.parenthesizeLeftSideOfAccess);
if (indirectCall) {
writePunctuation(")");
}
emit(node.questionDotToken);
emitTypeArguments(node, node.typeArguments);
emitExpressionList(node, node.arguments, ListFormat.CallExpressionArguments, parenthesizer.parenthesizeExpressionForDisallowedComma);
}
function emitNewExpression(node: NewExpression) {
emitTokenWithComment(SyntaxKind.NewKeyword, node.pos, writeKeyword, node);
writeSpace();
emitExpression(node.expression, parenthesizer.parenthesizeExpressionOfNew);
emitTypeArguments(node, node.typeArguments);
emitExpressionList(node, node.arguments, ListFormat.NewExpressionArguments, parenthesizer.parenthesizeExpressionForDisallowedComma);
}
function emitTaggedTemplateExpression(node: TaggedTemplateExpression) {
const indirectCall = getEmitFlags(node) & EmitFlags.IndirectCall;
if (indirectCall) {
writePunctuation("(");
writeLiteral("0");
writePunctuation(",");
writeSpace();
}
emitExpression(node.tag, parenthesizer.parenthesizeLeftSideOfAccess);
if (indirectCall) {
writePunctuation(")");
}
emitTypeArguments(node, node.typeArguments);
writeSpace();
emitExpression(node.template);
}
function emitTypeAssertionExpression(node: TypeAssertion) {
writePunctuation("<");
emit(node.type);
writePunctuation(">");
emitExpression(node.expression, parenthesizer.parenthesizeOperandOfPrefixUnary);
}
function emitParenthesizedExpression(node: ParenthesizedExpression) {
const openParenPos = emitTokenWithComment(SyntaxKind.OpenParenToken, node.pos, writePunctuation, node);
const indented = writeLineSeparatorsAndIndentBefore(node.expression, node);
emitExpression(node.expression, /*parenthesizerRules*/ undefined);
writeLineSeparatorsAfter(node.expression, node);
decreaseIndentIf(indented);
emitTokenWithComment(SyntaxKind.CloseParenToken, node.expression ? node.expression.end : openParenPos, writePunctuation, node);
}
function emitFunctionExpression(node: FunctionExpression) {
generateNameIfNeeded(node.name);
emitFunctionDeclarationOrExpression(node);
}
function emitArrowFunction(node: ArrowFunction) {
emitModifiers(node, node.modifiers);
emitSignatureAndBody(node, emitArrowFunctionHead);
}
function emitArrowFunctionHead(node: ArrowFunction) {
emitTypeParameters(node, node.typeParameters);
emitParametersForArrow(node, node.parameters);
emitTypeAnnotation(node.type);
writeSpace();
emit(node.equalsGreaterThanToken);
}
function emitDeleteExpression(node: DeleteExpression) {
emitTokenWithComment(SyntaxKind.DeleteKeyword, node.pos, writeKeyword, node);
writeSpace();
emitExpression(node.expression, parenthesizer.parenthesizeOperandOfPrefixUnary);
}
function emitTypeOfExpression(node: TypeOfExpression) {
emitTokenWithComment(SyntaxKind.TypeOfKeyword, node.pos, writeKeyword, node);
writeSpace();
emitExpression(node.expression, parenthesizer.parenthesizeOperandOfPrefixUnary);
}
function emitVoidExpression(node: VoidExpression) {
emitTokenWithComment(SyntaxKind.VoidKeyword, node.pos, writeKeyword, node);
writeSpace();
emitExpression(node.expression, parenthesizer.parenthesizeOperandOfPrefixUnary);
}
function emitAwaitExpression(node: AwaitExpression) {
emitTokenWithComment(SyntaxKind.AwaitKeyword, node.pos, writeKeyword, node);
writeSpace();
emitExpression(node.expression, parenthesizer.parenthesizeOperandOfPrefixUnary);
}
function emitPrefixUnaryExpression(node: PrefixUnaryExpression) {
writeTokenText(node.operator, writeOperator);
if (shouldEmitWhitespaceBeforeOperand(node)) {
writeSpace();
}
emitExpression(node.operand, parenthesizer.parenthesizeOperandOfPrefixUnary);
}
function shouldEmitWhitespaceBeforeOperand(node: PrefixUnaryExpression) {
// In some cases, we need to emit a space between the operator and the operand. One obvious case
// is when the operator is an identifier, like delete or typeof. We also need to do this for plus
// and minus expressions in certain cases. Specifically, consider the following two cases (parens
// are just for clarity of exposition, and not part of the source code):
//
// (+(+1))
// (+(++1))
//
// We need to emit a space in both cases. In the first case, the absence of a space will make
// the resulting expression a prefix increment operation. And in the second, it will make the resulting
// expression a prefix increment whose operand is a plus expression - (++(+x))
// The same is true of minus of course.
const operand = node.operand;
return operand.kind === SyntaxKind.PrefixUnaryExpression
&& ((node.operator === SyntaxKind.PlusToken && ((operand as PrefixUnaryExpression).operator === SyntaxKind.PlusToken || (operand as PrefixUnaryExpression).operator === SyntaxKind.PlusPlusToken))
|| (node.operator === SyntaxKind.MinusToken && ((operand as PrefixUnaryExpression).operator === SyntaxKind.MinusToken || (operand as PrefixUnaryExpression).operator === SyntaxKind.MinusMinusToken)));
}
function emitPostfixUnaryExpression(node: PostfixUnaryExpression) {
emitExpression(node.operand, parenthesizer.parenthesizeOperandOfPostfixUnary);
writeTokenText(node.operator, writeOperator);
}
function createEmitBinaryExpression() {
interface WorkArea {
stackIndex: number;
preserveSourceNewlinesStack: (boolean | undefined)[];
containerPosStack: number[];
containerEndStack: number[];
declarationListContainerEndStack: number[];
shouldEmitCommentsStack: boolean[];
shouldEmitSourceMapsStack: boolean[];
}
return createBinaryExpressionTrampoline(onEnter, onLeft, onOperator, onRight, onExit, /*foldState*/ undefined);
function onEnter(node: BinaryExpression, state: WorkArea | undefined) {
if (state) {
state.stackIndex++;
state.preserveSourceNewlinesStack[state.stackIndex] = preserveSourceNewlines;
state.containerPosStack[state.stackIndex] = containerPos;
state.containerEndStack[state.stackIndex] = containerEnd;
state.declarationListContainerEndStack[state.stackIndex] = declarationListContainerEnd;
const emitComments = state.shouldEmitCommentsStack[state.stackIndex] = shouldEmitComments(node);
const emitSourceMaps = state.shouldEmitSourceMapsStack[state.stackIndex] = shouldEmitSourceMaps(node);
onBeforeEmitNode?.(node);
if (emitComments) emitCommentsBeforeNode(node);
if (emitSourceMaps) emitSourceMapsBeforeNode(node);
beforeEmitNode(node);
}
else {
state = {
stackIndex: 0,
preserveSourceNewlinesStack: [undefined],
containerPosStack: [-1],
containerEndStack: [-1],
declarationListContainerEndStack: [-1],
shouldEmitCommentsStack: [false],
shouldEmitSourceMapsStack: [false],
};
}
return state;
}
function onLeft(next: Expression, _workArea: WorkArea, parent: BinaryExpression) {
return maybeEmitExpression(next, parent, "left");
}
function onOperator(operatorToken: BinaryOperatorToken, _state: WorkArea, node: BinaryExpression) {
const isCommaOperator = operatorToken.kind !== SyntaxKind.CommaToken;
const linesBeforeOperator = getLinesBetweenNodes(node, node.left, operatorToken);
const linesAfterOperator = getLinesBetweenNodes(node, operatorToken, node.right);
writeLinesAndIndent(linesBeforeOperator, isCommaOperator);
emitLeadingCommentsOfPosition(operatorToken.pos);
writeTokenNode(operatorToken, operatorToken.kind === SyntaxKind.InKeyword ? writeKeyword : writeOperator);
emitTrailingCommentsOfPosition(operatorToken.end, /*prefixSpace*/ true); // Binary operators should have a space before the comment starts
writeLinesAndIndent(linesAfterOperator, /*writeSpaceIfNotIndenting*/ true);
}
function onRight(next: Expression, _workArea: WorkArea, parent: BinaryExpression) {
return maybeEmitExpression(next, parent, "right");
}
function onExit(node: BinaryExpression, state: WorkArea) {
const linesBeforeOperator = getLinesBetweenNodes(node, node.left, node.operatorToken);
const linesAfterOperator = getLinesBetweenNodes(node, node.operatorToken, node.right);
decreaseIndentIf(linesBeforeOperator, linesAfterOperator);
if (state.stackIndex > 0) {
const savedPreserveSourceNewlines = state.preserveSourceNewlinesStack[state.stackIndex];
const savedContainerPos = state.containerPosStack[state.stackIndex];
const savedContainerEnd = state.containerEndStack[state.stackIndex];
const savedDeclarationListContainerEnd = state.declarationListContainerEndStack[state.stackIndex];
const shouldEmitComments = state.shouldEmitCommentsStack[state.stackIndex];
const shouldEmitSourceMaps = state.shouldEmitSourceMapsStack[state.stackIndex];
afterEmitNode(savedPreserveSourceNewlines);
if (shouldEmitSourceMaps) emitSourceMapsAfterNode(node);
if (shouldEmitComments) emitCommentsAfterNode(node, savedContainerPos, savedContainerEnd, savedDeclarationListContainerEnd);
onAfterEmitNode?.(node);
state.stackIndex--;
}
}
function maybeEmitExpression(next: Expression, parent: BinaryExpression, side: "left" | "right") {
const parenthesizerRule = side === "left" ?
parenthesizer.getParenthesizeLeftSideOfBinaryForOperator(parent.operatorToken.kind) :
parenthesizer.getParenthesizeRightSideOfBinaryForOperator(parent.operatorToken.kind);
let pipelinePhase = getPipelinePhase(PipelinePhase.Notification, EmitHint.Expression, next);
if (pipelinePhase === pipelineEmitWithSubstitution) {
Debug.assertIsDefined(lastSubstitution);
next = parenthesizerRule(cast(lastSubstitution, isExpression));
pipelinePhase = getNextPipelinePhase(PipelinePhase.Substitution, EmitHint.Expression, next);
lastSubstitution = undefined;
}
if (pipelinePhase === pipelineEmitWithComments ||
pipelinePhase === pipelineEmitWithSourceMaps ||
pipelinePhase === pipelineEmitWithHint) {
if (isBinaryExpression(next)) {
return next;
}
}
currentParenthesizerRule = parenthesizerRule;
pipelinePhase(EmitHint.Expression, next);
}
}
function emitConditionalExpression(node: ConditionalExpression) {
const linesBeforeQuestion = getLinesBetweenNodes(node, node.condition, node.questionToken);
const linesAfterQuestion = getLinesBetweenNodes(node, node.questionToken, node.whenTrue);
const linesBeforeColon = getLinesBetweenNodes(node, node.whenTrue, node.colonToken);
const linesAfterColon = getLinesBetweenNodes(node, node.colonToken, node.whenFalse);
emitExpression(node.condition, parenthesizer.parenthesizeConditionOfConditionalExpression);
writeLinesAndIndent(linesBeforeQuestion, /*writeSpaceIfNotIndenting*/ true);
emit(node.questionToken);
writeLinesAndIndent(linesAfterQuestion, /*writeSpaceIfNotIndenting*/ true);
emitExpression(node.whenTrue, parenthesizer.parenthesizeBranchOfConditionalExpression);
decreaseIndentIf(linesBeforeQuestion, linesAfterQuestion);
writeLinesAndIndent(linesBeforeColon, /*writeSpaceIfNotIndenting*/ true);
emit(node.colonToken);
writeLinesAndIndent(linesAfterColon, /*writeSpaceIfNotIndenting*/ true);
emitExpression(node.whenFalse, parenthesizer.parenthesizeBranchOfConditionalExpression);
decreaseIndentIf(linesBeforeColon, linesAfterColon);
}
function emitTemplateExpression(node: TemplateExpression) {
emit(node.head);
emitList(node, node.templateSpans, ListFormat.TemplateExpressionSpans);
}
function emitYieldExpression(node: YieldExpression) {
emitTokenWithComment(SyntaxKind.YieldKeyword, node.pos, writeKeyword, node);
emit(node.asteriskToken);
emitExpressionWithLeadingSpace(node.expression && parenthesizeExpressionForNoAsi(node.expression), parenthesizeExpressionForNoAsiAndDisallowedComma);
}
function emitSpreadElement(node: SpreadElement) {
emitTokenWithComment(SyntaxKind.DotDotDotToken, node.pos, writePunctuation, node);
emitExpression(node.expression, parenthesizer.parenthesizeExpressionForDisallowedComma);
}
function emitClassExpression(node: ClassExpression) {
generateNameIfNeeded(node.name);
emitClassDeclarationOrExpression(node);
}
function emitExpressionWithTypeArguments(node: ExpressionWithTypeArguments) {
emitExpression(node.expression, parenthesizer.parenthesizeLeftSideOfAccess);
emitTypeArguments(node, node.typeArguments);
}
function emitAsExpression(node: AsExpression) {
emitExpression(node.expression, /*parenthesizerRules*/ undefined);
if (node.type) {
writeSpace();
writeKeyword("as");
writeSpace();
emit(node.type);
}
}
function emitNonNullExpression(node: NonNullExpression) {
emitExpression(node.expression, parenthesizer.parenthesizeLeftSideOfAccess);
writeOperator("!");
}
function emitMetaProperty(node: MetaProperty) {
writeToken(node.keywordToken, node.pos, writePunctuation);
writePunctuation(".");
emit(node.name);
}
//
// Misc
//
function emitTemplateSpan(node: TemplateSpan) {
emitExpression(node.expression);
emit(node.literal);
}
//
// Statements
//
function emitBlock(node: Block) {
emitBlockStatements(node, /*forceSingleLine*/ !node.multiLine && isEmptyBlock(node));
}
function emitBlockStatements(node: BlockLike, forceSingleLine: boolean) {
emitTokenWithComment(SyntaxKind.OpenBraceToken, node.pos, writePunctuation, /*contextNode*/ node);
const format = forceSingleLine || getEmitFlags(node) & EmitFlags.SingleLine ? ListFormat.SingleLineBlockStatements : ListFormat.MultiLineBlockStatements;
emitList(node, node.statements, format);
emitTokenWithComment(SyntaxKind.CloseBraceToken, node.statements.end, writePunctuation, /*contextNode*/ node, /*indentLeading*/ !!(format & ListFormat.MultiLine));
}
function emitVariableStatement(node: VariableStatement) {
emitModifiers(node, node.modifiers);
emit(node.declarationList);
writeTrailingSemicolon();
}
function emitEmptyStatement(isEmbeddedStatement: boolean) {
// While most trailing semicolons are possibly insignificant, an embedded "empty"
// statement is significant and cannot be elided by a trailing-semicolon-omitting writer.
if (isEmbeddedStatement) {
writePunctuation(";");
}
else {
writeTrailingSemicolon();
}
}
function emitExpressionStatement(node: ExpressionStatement) {
emitExpression(node.expression, parenthesizer.parenthesizeExpressionOfExpressionStatement);
// Emit semicolon in non json files
// or if json file that created synthesized expression(eg.define expression statement when --out and amd code generation)
if (!currentSourceFile || !isJsonSourceFile(currentSourceFile) || nodeIsSynthesized(node.expression)) {
writeTrailingSemicolon();
}
}
function emitIfStatement(node: IfStatement) {
const openParenPos = emitTokenWithComment(SyntaxKind.IfKeyword, node.pos, writeKeyword, node);
writeSpace();
emitTokenWithComment(SyntaxKind.OpenParenToken, openParenPos, writePunctuation, node);
emitExpression(node.expression);
emitTokenWithComment(SyntaxKind.CloseParenToken, node.expression.end, writePunctuation, node);
emitEmbeddedStatement(node, node.thenStatement);
if (node.elseStatement) {
writeLineOrSpace(node, node.thenStatement, node.elseStatement);
emitTokenWithComment(SyntaxKind.ElseKeyword, node.thenStatement.end, writeKeyword, node);
if (node.elseStatement.kind === SyntaxKind.IfStatement) {
writeSpace();
emit(node.elseStatement);
}
else {
emitEmbeddedStatement(node, node.elseStatement);
}
}
}
function emitWhileClause(node: WhileStatement | DoStatement, startPos: number) {
const openParenPos = emitTokenWithComment(SyntaxKind.WhileKeyword, startPos, writeKeyword, node);
writeSpace();
emitTokenWithComment(SyntaxKind.OpenParenToken, openParenPos, writePunctuation, node);
emitExpression(node.expression);
emitTokenWithComment(SyntaxKind.CloseParenToken, node.expression.end, writePunctuation, node);
}
function emitDoStatement(node: DoStatement) {
emitTokenWithComment(SyntaxKind.DoKeyword, node.pos, writeKeyword, node);
emitEmbeddedStatement(node, node.statement);
if (isBlock(node.statement) && !preserveSourceNewlines) {
writeSpace();
}
else {
writeLineOrSpace(node, node.statement, node.expression);
}
emitWhileClause(node, node.statement.end);
writeTrailingSemicolon();
}
function emitWhileStatement(node: WhileStatement) {
emitWhileClause(node, node.pos);
emitEmbeddedStatement(node, node.statement);
}
function emitForStatement(node: ForStatement) {
const openParenPos = emitTokenWithComment(SyntaxKind.ForKeyword, node.pos, writeKeyword, node);
writeSpace();
let pos = emitTokenWithComment(SyntaxKind.OpenParenToken, openParenPos, writePunctuation, /*contextNode*/ node);
emitForBinding(node.initializer);
pos = emitTokenWithComment(SyntaxKind.SemicolonToken, node.initializer ? node.initializer.end : pos, writePunctuation, node);
emitExpressionWithLeadingSpace(node.condition);
pos = emitTokenWithComment(SyntaxKind.SemicolonToken, node.condition ? node.condition.end : pos, writePunctuation, node);
emitExpressionWithLeadingSpace(node.incrementor);
emitTokenWithComment(SyntaxKind.CloseParenToken, node.incrementor ? node.incrementor.end : pos, writePunctuation, node);
emitEmbeddedStatement(node, node.statement);
}
function emitForInStatement(node: ForInStatement) {
const openParenPos = emitTokenWithComment(SyntaxKind.ForKeyword, node.pos, writeKeyword, node);
writeSpace();
emitTokenWithComment(SyntaxKind.OpenParenToken, openParenPos, writePunctuation, node);
emitForBinding(node.initializer);
writeSpace();
emitTokenWithComment(SyntaxKind.InKeyword, node.initializer.end, writeKeyword, node);
writeSpace();
emitExpression(node.expression);
emitTokenWithComment(SyntaxKind.CloseParenToken, node.expression.end, writePunctuation, node);
emitEmbeddedStatement(node, node.statement);
}
function emitForOfStatement(node: ForOfStatement) {
const openParenPos = emitTokenWithComment(SyntaxKind.ForKeyword, node.pos, writeKeyword, node);
writeSpace();
emitWithTrailingSpace(node.awaitModifier);
emitTokenWithComment(SyntaxKind.OpenParenToken, openParenPos, writePunctuation, node);
emitForBinding(node.initializer);
writeSpace();
emitTokenWithComment(SyntaxKind.OfKeyword, node.initializer.end, writeKeyword, node);
writeSpace();
emitExpression(node.expression);
emitTokenWithComment(SyntaxKind.CloseParenToken, node.expression.end, writePunctuation, node);
emitEmbeddedStatement(node, node.statement);
}
function emitForBinding(node: VariableDeclarationList | Expression | undefined) {
if (node !== undefined) {
if (node.kind === SyntaxKind.VariableDeclarationList) {
emit(node);
}
else {
emitExpression(node);
}
}
}
function emitContinueStatement(node: ContinueStatement) {
emitTokenWithComment(SyntaxKind.ContinueKeyword, node.pos, writeKeyword, node);
emitWithLeadingSpace(node.label);
writeTrailingSemicolon();
}
function emitBreakStatement(node: BreakStatement) {
emitTokenWithComment(SyntaxKind.BreakKeyword, node.pos, writeKeyword, node);
emitWithLeadingSpace(node.label);
writeTrailingSemicolon();
}
function emitTokenWithComment(token: SyntaxKind, pos: number, writer: (s: string) => void, contextNode: Node, indentLeading?: boolean) {
const node = getParseTreeNode(contextNode);
const isSimilarNode = node && node.kind === contextNode.kind;
const startPos = pos;
if (isSimilarNode && currentSourceFile) {
pos = skipTrivia(currentSourceFile.text, pos);
}
if (isSimilarNode && contextNode.pos !== startPos) {
const needsIndent = indentLeading && currentSourceFile && !positionsAreOnSameLine(startPos, pos, currentSourceFile);
if (needsIndent) {
increaseIndent();
}
emitLeadingCommentsOfPosition(startPos);
if (needsIndent) {
decreaseIndent();
}
}
pos = writeTokenText(token, writer, pos);
if (isSimilarNode && contextNode.end !== pos) {
const isJsxExprContext = contextNode.kind === SyntaxKind.JsxExpression;
emitTrailingCommentsOfPosition(pos, /*prefixSpace*/ !isJsxExprContext, /*forceNoNewline*/ isJsxExprContext);
}
return pos;
}
function commentWillEmitNewLine(node: CommentRange) {
return node.kind === SyntaxKind.SingleLineCommentTrivia || !!node.hasTrailingNewLine;
}
function willEmitLeadingNewLine(node: Expression): boolean {
if (!currentSourceFile) return false;
if (some(getLeadingCommentRanges(currentSourceFile.text, node.pos), commentWillEmitNewLine)) return true;
if (some(getSyntheticLeadingComments(node), commentWillEmitNewLine)) return true;
if (isPartiallyEmittedExpression(node)) {
if (node.pos !== node.expression.pos) {
if (some(getTrailingCommentRanges(currentSourceFile.text, node.expression.pos), commentWillEmitNewLine)) return true;
}
return willEmitLeadingNewLine(node.expression);
}
return false;
}
/**
* Wraps an expression in parens if we would emit a leading comment that would introduce a line separator
* between the node and its parent.
*/
function parenthesizeExpressionForNoAsi(node: Expression) {
if (!commentsDisabled && isPartiallyEmittedExpression(node) && willEmitLeadingNewLine(node)) {
const parseNode = getParseTreeNode(node);
if (parseNode && isParenthesizedExpression(parseNode)) {
// If the original node was a parenthesized expression, restore it to preserve comment and source map emit
const parens = factory.createParenthesizedExpression(node.expression);
setOriginalNode(parens, node);
setTextRange(parens, parseNode);
return parens;
}
return factory.createParenthesizedExpression(node);
}
return node;
}
function parenthesizeExpressionForNoAsiAndDisallowedComma(node: Expression) {
return parenthesizeExpressionForNoAsi(parenthesizer.parenthesizeExpressionForDisallowedComma(node));
}
function emitReturnStatement(node: ReturnStatement) {
emitTokenWithComment(SyntaxKind.ReturnKeyword, node.pos, writeKeyword, /*contextNode*/ node);
emitExpressionWithLeadingSpace(node.expression && parenthesizeExpressionForNoAsi(node.expression), parenthesizeExpressionForNoAsi);
writeTrailingSemicolon();
}
function emitWithStatement(node: WithStatement) {
const openParenPos = emitTokenWithComment(SyntaxKind.WithKeyword, node.pos, writeKeyword, node);
writeSpace();
emitTokenWithComment(SyntaxKind.OpenParenToken, openParenPos, writePunctuation, node);
emitExpression(node.expression);
emitTokenWithComment(SyntaxKind.CloseParenToken, node.expression.end, writePunctuation, node);
emitEmbeddedStatement(node, node.statement);
}
function emitSwitchStatement(node: SwitchStatement) {
const openParenPos = emitTokenWithComment(SyntaxKind.SwitchKeyword, node.pos, writeKeyword, node);
writeSpace();
emitTokenWithComment(SyntaxKind.OpenParenToken, openParenPos, writePunctuation, node);
emitExpression(node.expression);
emitTokenWithComment(SyntaxKind.CloseParenToken, node.expression.end, writePunctuation, node);
writeSpace();
emit(node.caseBlock);
}
function emitLabeledStatement(node: LabeledStatement) {
emit(node.label);
emitTokenWithComment(SyntaxKind.ColonToken, node.label.end, writePunctuation, node);
writeSpace();
emit(node.statement);
}
function emitThrowStatement(node: ThrowStatement) {
emitTokenWithComment(SyntaxKind.ThrowKeyword, node.pos, writeKeyword, node);
emitExpressionWithLeadingSpace(parenthesizeExpressionForNoAsi(node.expression), parenthesizeExpressionForNoAsi);
writeTrailingSemicolon();
}
function emitTryStatement(node: TryStatement) {
emitTokenWithComment(SyntaxKind.TryKeyword, node.pos, writeKeyword, node);
writeSpace();
emit(node.tryBlock);
if (node.catchClause) {
writeLineOrSpace(node, node.tryBlock, node.catchClause);
emit(node.catchClause);
}
if (node.finallyBlock) {
writeLineOrSpace(node, node.catchClause || node.tryBlock, node.finallyBlock);
emitTokenWithComment(SyntaxKind.FinallyKeyword, (node.catchClause || node.tryBlock).end, writeKeyword, node);
writeSpace();
emit(node.finallyBlock);
}
}
function emitDebuggerStatement(node: DebuggerStatement) {
writeToken(SyntaxKind.DebuggerKeyword, node.pos, writeKeyword);
writeTrailingSemicolon();
}
//
// Declarations
//
function emitVariableDeclaration(node: VariableDeclaration) {
emit(node.name);
emit(node.exclamationToken);
emitTypeAnnotation(node.type);
emitInitializer(node.initializer, node.type?.end ?? node.name.emitNode?.typeNode?.end ?? node.name.end, node, parenthesizer.parenthesizeExpressionForDisallowedComma);
}
function emitVariableDeclarationList(node: VariableDeclarationList) {
writeKeyword(isLet(node) ? "let" : isVarConst(node) ? "const" : "var");
writeSpace();
emitList(node, node.declarations, ListFormat.VariableDeclarationList);
}
function emitFunctionDeclaration(node: FunctionDeclaration) {
emitFunctionDeclarationOrExpression(node);
}
function emitFunctionDeclarationOrExpression(node: FunctionDeclaration | FunctionExpression) {
emitModifiers(node, node.modifiers);
writeKeyword("function");
emit(node.asteriskToken);
writeSpace();
emitIdentifierName(node.name);
emitSignatureAndBody(node, emitSignatureHead);
}
function emitSignatureAndBody(node: FunctionLikeDeclaration, emitSignatureHead: (node: SignatureDeclaration) => void) {
const body = node.body;
if (body) {
if (isBlock(body)) {
const indentedFlag = getEmitFlags(node) & EmitFlags.Indented;
if (indentedFlag) {
increaseIndent();
}
pushNameGenerationScope(node);
forEach(node.parameters, generateNames);
generateNames(node.body);
emitSignatureHead(node);
emitBlockFunctionBody(body);
popNameGenerationScope(node);
if (indentedFlag) {
decreaseIndent();
}
}
else {
emitSignatureHead(node);
writeSpace();
emitExpression(body, parenthesizer.parenthesizeConciseBodyOfArrowFunction);
}
}
else {
emitSignatureHead(node);
writeTrailingSemicolon();
}
}
function emitSignatureHead(node: FunctionDeclaration | FunctionExpression | MethodDeclaration | AccessorDeclaration | ConstructorDeclaration) {
emitTypeParameters(node, node.typeParameters);
emitParameters(node, node.parameters);
emitTypeAnnotation(node.type);
}
function shouldEmitBlockFunctionBodyOnSingleLine(body: Block) {
// We must emit a function body as a single-line body in the following case:
// * The body has NodeEmitFlags.SingleLine specified.
// We must emit a function body as a multi-line body in the following cases:
// * The body is explicitly marked as multi-line.
// * A non-synthesized body's start and end position are on different lines.
// * Any statement in the body starts on a new line.
if (getEmitFlags(body) & EmitFlags.SingleLine) {
return true;
}
if (body.multiLine) {
return false;
}
if (!nodeIsSynthesized(body) && currentSourceFile && !rangeIsOnSingleLine(body, currentSourceFile)) {
return false;
}
if (getLeadingLineTerminatorCount(body, firstOrUndefined(body.statements), ListFormat.PreserveLines)
|| getClosingLineTerminatorCount(body, lastOrUndefined(body.statements), ListFormat.PreserveLines, body.statements)) {
return false;
}
let previousStatement: Statement | undefined;
for (const statement of body.statements) {
if (getSeparatingLineTerminatorCount(previousStatement, statement, ListFormat.PreserveLines) > 0) {
return false;
}
previousStatement = statement;
}
return true;
}
function emitBlockFunctionBody(body: Block) {
onBeforeEmitNode?.(body);
writeSpace();
writePunctuation("{");
increaseIndent();
const emitBlockFunctionBody = shouldEmitBlockFunctionBodyOnSingleLine(body)
? emitBlockFunctionBodyOnSingleLine
: emitBlockFunctionBodyWorker;
emitBodyWithDetachedComments(body, body.statements, emitBlockFunctionBody);
decreaseIndent();
writeToken(SyntaxKind.CloseBraceToken, body.statements.end, writePunctuation, body);
onAfterEmitNode?.(body);
}
function emitBlockFunctionBodyOnSingleLine(body: Block) {
emitBlockFunctionBodyWorker(body, /*emitBlockFunctionBodyOnSingleLine*/ true);
}
function emitBlockFunctionBodyWorker(body: Block, emitBlockFunctionBodyOnSingleLine?: boolean) {
// Emit all the prologue directives (like "use strict").
const statementOffset = emitPrologueDirectives(body.statements);
const pos = writer.getTextPos();
emitHelpers(body);
if (statementOffset === 0 && pos === writer.getTextPos() && emitBlockFunctionBodyOnSingleLine) {
decreaseIndent();
emitList(body, body.statements, ListFormat.SingleLineFunctionBodyStatements);
increaseIndent();
}
else {
emitList(body, body.statements, ListFormat.MultiLineFunctionBodyStatements, /*parenthesizerRule*/ undefined, statementOffset);
}
}
function emitClassDeclaration(node: ClassDeclaration) {
emitClassDeclarationOrExpression(node);
}
function emitClassDeclarationOrExpression(node: ClassDeclaration | ClassExpression) {
forEach(node.members, generateMemberNames);
emitDecoratorsAndModifiers(node, node.modifiers);
writeKeyword("class");
if (node.name) {
writeSpace();
emitIdentifierName(node.name);
}
const indentedFlag = getEmitFlags(node) & EmitFlags.Indented;
if (indentedFlag) {
increaseIndent();
}
emitTypeParameters(node, node.typeParameters);
emitList(node, node.heritageClauses, ListFormat.ClassHeritageClauses);
writeSpace();
writePunctuation("{");
emitList(node, node.members, ListFormat.ClassMembers);
writePunctuation("}");
if (indentedFlag) {
decreaseIndent();
}
}
function emitInterfaceDeclaration(node: InterfaceDeclaration) {
emitModifiers(node, node.modifiers);
writeKeyword("interface");
writeSpace();
emit(node.name);
emitTypeParameters(node, node.typeParameters);
emitList(node, node.heritageClauses, ListFormat.HeritageClauses);
writeSpace();
writePunctuation("{");
emitList(node, node.members, ListFormat.InterfaceMembers);
writePunctuation("}");
}
function emitTypeAliasDeclaration(node: TypeAliasDeclaration) {
emitModifiers(node, node.modifiers);
writeKeyword("type");
writeSpace();
emit(node.name);
emitTypeParameters(node, node.typeParameters);
writeSpace();
writePunctuation("=");
writeSpace();
emit(node.type);
writeTrailingSemicolon();
}
function emitEnumDeclaration(node: EnumDeclaration) {
emitModifiers(node, node.modifiers);
writeKeyword("enum");
writeSpace();
emit(node.name);
writeSpace();
writePunctuation("{");
emitList(node, node.members, ListFormat.EnumMembers);
writePunctuation("}");
}
function emitModuleDeclaration(node: ModuleDeclaration) {
emitModifiers(node, node.modifiers);
if (~node.flags & NodeFlags.GlobalAugmentation) {
writeKeyword(node.flags & NodeFlags.Namespace ? "namespace" : "module");
writeSpace();
}
emit(node.name);
let body = node.body;
if (!body) return writeTrailingSemicolon();
while (body && isModuleDeclaration(body)) {
writePunctuation(".");
emit(body.name);
body = body.body;
}
writeSpace();
emit(body);
}
function emitModuleBlock(node: ModuleBlock) {
pushNameGenerationScope(node);
forEach(node.statements, generateNames);
emitBlockStatements(node, /*forceSingleLine*/ isEmptyBlock(node));
popNameGenerationScope(node);
}
function emitCaseBlock(node: CaseBlock) {
emitTokenWithComment(SyntaxKind.OpenBraceToken, node.pos, writePunctuation, node);
emitList(node, node.clauses, ListFormat.CaseBlockClauses);
emitTokenWithComment(SyntaxKind.CloseBraceToken, node.clauses.end, writePunctuation, node, /*indentLeading*/ true);
}
function emitImportEqualsDeclaration(node: ImportEqualsDeclaration) {
emitModifiers(node, node.modifiers);
emitTokenWithComment(SyntaxKind.ImportKeyword, node.modifiers ? node.modifiers.end : node.pos, writeKeyword, node);
writeSpace();
if (node.isTypeOnly) {
emitTokenWithComment(SyntaxKind.TypeKeyword, node.pos, writeKeyword, node);
writeSpace();
}
emit(node.name);
writeSpace();
emitTokenWithComment(SyntaxKind.EqualsToken, node.name.end, writePunctuation, node);
writeSpace();
emitModuleReference(node.moduleReference);
writeTrailingSemicolon();
}
function emitModuleReference(node: ModuleReference) {
if (node.kind === SyntaxKind.Identifier) {
emitExpression(node);
}
else {
emit(node);
}
}
function emitImportDeclaration(node: ImportDeclaration) {
emitModifiers(node, node.modifiers);
emitTokenWithComment(SyntaxKind.ImportKeyword, node.modifiers ? node.modifiers.end : node.pos, writeKeyword, node);
writeSpace();
if (node.importClause) {
emit(node.importClause);
writeSpace();
emitTokenWithComment(SyntaxKind.FromKeyword, node.importClause.end, writeKeyword, node);
writeSpace();
}
emitExpression(node.moduleSpecifier);
if (node.assertClause) {
emitWithLeadingSpace(node.assertClause);
}
writeTrailingSemicolon();
}
function emitImportClause(node: ImportClause) {
if (node.isTypeOnly) {
emitTokenWithComment(SyntaxKind.TypeKeyword, node.pos, writeKeyword, node);
writeSpace();
}
emit(node.name);
if (node.name && node.namedBindings) {
emitTokenWithComment(SyntaxKind.CommaToken, node.name.end, writePunctuation, node);
writeSpace();
}
emit(node.namedBindings);
}
function emitNamespaceImport(node: NamespaceImport) {
const asPos = emitTokenWithComment(SyntaxKind.AsteriskToken, node.pos, writePunctuation, node);
writeSpace();
emitTokenWithComment(SyntaxKind.AsKeyword, asPos, writeKeyword, node);
writeSpace();
emit(node.name);
}
function emitNamedImports(node: NamedImports) {
emitNamedImportsOrExports(node);
}
function emitImportSpecifier(node: ImportSpecifier) {
emitImportOrExportSpecifier(node);
}
function emitExportAssignment(node: ExportAssignment) {
const nextPos = emitTokenWithComment(SyntaxKind.ExportKeyword, node.pos, writeKeyword, node);
writeSpace();
if (node.isExportEquals) {
emitTokenWithComment(SyntaxKind.EqualsToken, nextPos, writeOperator, node);
}
else {
emitTokenWithComment(SyntaxKind.DefaultKeyword, nextPos, writeKeyword, node);
}
writeSpace();
emitExpression(node.expression, node.isExportEquals ?
parenthesizer.getParenthesizeRightSideOfBinaryForOperator(SyntaxKind.EqualsToken) :
parenthesizer.parenthesizeExpressionOfExportDefault);
writeTrailingSemicolon();
}
function emitExportDeclaration(node: ExportDeclaration) {
let nextPos = emitTokenWithComment(SyntaxKind.ExportKeyword, node.pos, writeKeyword, node);
writeSpace();
if (node.isTypeOnly) {
nextPos = emitTokenWithComment(SyntaxKind.TypeKeyword, nextPos, writeKeyword, node);
writeSpace();
}
if (node.exportClause) {
emit(node.exportClause);
}
else {
nextPos = emitTokenWithComment(SyntaxKind.AsteriskToken, nextPos, writePunctuation, node);
}
if (node.moduleSpecifier) {
writeSpace();
const fromPos = node.exportClause ? node.exportClause.end : nextPos;
emitTokenWithComment(SyntaxKind.FromKeyword, fromPos, writeKeyword, node);
writeSpace();
emitExpression(node.moduleSpecifier);
}
if (node.assertClause) {
emitWithLeadingSpace(node.assertClause);
}
writeTrailingSemicolon();
}
function emitAssertClause(node: AssertClause) {
emitTokenWithComment(SyntaxKind.AssertKeyword, node.pos, writeKeyword, node);
writeSpace();
const elements = node.elements;
emitList(node, elements, ListFormat.ImportClauseEntries);
}
function emitAssertEntry(node: AssertEntry) {
emit(node.name);
writePunctuation(":");
writeSpace();
const value = node.value;
/** @see {emitPropertyAssignment} */
if ((getEmitFlags(value) & EmitFlags.NoLeadingComments) === 0) {
const commentRange = getCommentRange(value);
emitTrailingCommentsOfPosition(commentRange.pos);
}
emit(value);
}
function emitNamespaceExportDeclaration(node: NamespaceExportDeclaration) {
let nextPos = emitTokenWithComment(SyntaxKind.ExportKeyword, node.pos, writeKeyword, node);
writeSpace();
nextPos = emitTokenWithComment(SyntaxKind.AsKeyword, nextPos, writeKeyword, node);
writeSpace();
nextPos = emitTokenWithComment(SyntaxKind.NamespaceKeyword, nextPos, writeKeyword, node);
writeSpace();
emit(node.name);
writeTrailingSemicolon();
}
function emitNamespaceExport(node: NamespaceExport) {
const asPos = emitTokenWithComment(SyntaxKind.AsteriskToken, node.pos, writePunctuation, node);
writeSpace();
emitTokenWithComment(SyntaxKind.AsKeyword, asPos, writeKeyword, node);
writeSpace();
emit(node.name);
}
function emitNamedExports(node: NamedExports) {
emitNamedImportsOrExports(node);
}
function emitExportSpecifier(node: ExportSpecifier) {
emitImportOrExportSpecifier(node);
}
function emitNamedImportsOrExports(node: NamedImportsOrExports) {
writePunctuation("{");
emitList(node, node.elements, ListFormat.NamedImportsOrExportsElements);
writePunctuation("}");
}
function emitImportOrExportSpecifier(node: ImportOrExportSpecifier) {
if (node.isTypeOnly) {
writeKeyword("type");
writeSpace();
}
if (node.propertyName) {
emit(node.propertyName);
writeSpace();
emitTokenWithComment(SyntaxKind.AsKeyword, node.propertyName.end, writeKeyword, node);
writeSpace();
}
emit(node.name);
}
//
// Module references
//
function emitExternalModuleReference(node: ExternalModuleReference) {
writeKeyword("require");
writePunctuation("(");
emitExpression(node.expression);
writePunctuation(")");
}
//
// JSX
//
function emitJsxElement(node: JsxElement) {
emit(node.openingElement);
emitList(node, node.children, ListFormat.JsxElementOrFragmentChildren);
emit(node.closingElement);
}
function emitJsxSelfClosingElement(node: JsxSelfClosingElement) {
writePunctuation("<");
emitJsxTagName(node.tagName);
emitTypeArguments(node, node.typeArguments);
writeSpace();
emit(node.attributes);
writePunctuation("/>");
}
function emitJsxFragment(node: JsxFragment) {
emit(node.openingFragment);
emitList(node, node.children, ListFormat.JsxElementOrFragmentChildren);
emit(node.closingFragment);
}
function emitJsxOpeningElementOrFragment(node: JsxOpeningElement | JsxOpeningFragment) {
writePunctuation("<");
if (isJsxOpeningElement(node)) {
const indented = writeLineSeparatorsAndIndentBefore(node.tagName, node);
emitJsxTagName(node.tagName);
emitTypeArguments(node, node.typeArguments);
if (node.attributes.properties && node.attributes.properties.length > 0) {
writeSpace();
}
emit(node.attributes);
writeLineSeparatorsAfter(node.attributes, node);
decreaseIndentIf(indented);
}
writePunctuation(">");
}
function emitJsxText(node: JsxText) {
writer.writeLiteral(node.text);
}
function emitJsxClosingElementOrFragment(node: JsxClosingElement | JsxClosingFragment) {
writePunctuation("</");
if (isJsxClosingElement(node)) {
emitJsxTagName(node.tagName);
}
writePunctuation(">");
}
function emitJsxAttributes(node: JsxAttributes) {
emitList(node, node.properties, ListFormat.JsxElementAttributes);
}
function emitJsxAttribute(node: JsxAttribute) {
emit(node.name);
emitNodeWithPrefix("=", writePunctuation, node.initializer, emitJsxAttributeValue);
}
function emitJsxSpreadAttribute(node: JsxSpreadAttribute) {
writePunctuation("{...");
emitExpression(node.expression);
writePunctuation("}");
}
function hasTrailingCommentsAtPosition(pos: number) {
let result = false;
forEachTrailingCommentRange(currentSourceFile?.text || "", pos + 1, () => result = true);
return result;
}
function hasLeadingCommentsAtPosition(pos: number) {
let result = false;
forEachLeadingCommentRange(currentSourceFile?.text || "", pos + 1, () => result = true);
return result;
}
function hasCommentsAtPosition(pos: number) {
return hasTrailingCommentsAtPosition(pos) || hasLeadingCommentsAtPosition(pos);
}
function emitJsxExpression(node: JsxExpression) {
if (node.expression || (!commentsDisabled && !nodeIsSynthesized(node) && hasCommentsAtPosition(node.pos))) { // preserve empty expressions if they contain comments!
const isMultiline = currentSourceFile && !nodeIsSynthesized(node) && getLineAndCharacterOfPosition(currentSourceFile, node.pos).line !== getLineAndCharacterOfPosition(currentSourceFile, node.end).line;
if (isMultiline) {
writer.increaseIndent();
}
const end = emitTokenWithComment(SyntaxKind.OpenBraceToken, node.pos, writePunctuation, node);
emit(node.dotDotDotToken);
emitExpression(node.expression);
emitTokenWithComment(SyntaxKind.CloseBraceToken, node.expression?.end || end, writePunctuation, node);
if (isMultiline) {
writer.decreaseIndent();
}
}
}
function emitJsxTagName(node: JsxTagNameExpression) {
if (node.kind === SyntaxKind.Identifier) {
emitExpression(node);
}
else {
emit(node);
}
}
//
// Clauses
//
function emitCaseClause(node: CaseClause) {
emitTokenWithComment(SyntaxKind.CaseKeyword, node.pos, writeKeyword, node);
writeSpace();
emitExpression(node.expression, parenthesizer.parenthesizeExpressionForDisallowedComma);
emitCaseOrDefaultClauseRest(node, node.statements, node.expression.end);
}
function emitDefaultClause(node: DefaultClause) {
const pos = emitTokenWithComment(SyntaxKind.DefaultKeyword, node.pos, writeKeyword, node);
emitCaseOrDefaultClauseRest(node, node.statements, pos);
}
function emitCaseOrDefaultClauseRest(parentNode: Node, statements: NodeArray<Statement>, colonPos: number) {
const emitAsSingleStatement =
statements.length === 1 &&
(
// treat synthesized nodes as located on the same line for emit purposes
!currentSourceFile ||
nodeIsSynthesized(parentNode) ||
nodeIsSynthesized(statements[0]) ||
rangeStartPositionsAreOnSameLine(parentNode, statements[0], currentSourceFile)
);
let format = ListFormat.CaseOrDefaultClauseStatements;
if (emitAsSingleStatement) {
writeToken(SyntaxKind.ColonToken, colonPos, writePunctuation, parentNode);
writeSpace();
format &= ~(ListFormat.MultiLine | ListFormat.Indented);
}
else {
emitTokenWithComment(SyntaxKind.ColonToken, colonPos, writePunctuation, parentNode);
}
emitList(parentNode, statements, format);
}
function emitHeritageClause(node: HeritageClause) {
writeSpace();
writeTokenText(node.token, writeKeyword);
writeSpace();
emitList(node, node.types, ListFormat.HeritageClauseTypes);
}
function emitCatchClause(node: CatchClause) {
const openParenPos = emitTokenWithComment(SyntaxKind.CatchKeyword, node.pos, writeKeyword, node);
writeSpace();
if (node.variableDeclaration) {
emitTokenWithComment(SyntaxKind.OpenParenToken, openParenPos, writePunctuation, node);
emit(node.variableDeclaration);
emitTokenWithComment(SyntaxKind.CloseParenToken, node.variableDeclaration.end, writePunctuation, node);
writeSpace();
}
emit(node.block);
}
//
// Property assignments
//
function emitPropertyAssignment(node: PropertyAssignment) {
emit(node.name);
writePunctuation(":");
writeSpace();
// This is to ensure that we emit comment in the following case:
// For example:
// obj = {
// id: /*comment1*/ ()=>void
// }
// "comment1" is not considered to be leading comment for node.initializer
// but rather a trailing comment on the previous node.
const initializer = node.initializer;
if ((getEmitFlags(initializer) & EmitFlags.NoLeadingComments) === 0) {
const commentRange = getCommentRange(initializer);
emitTrailingCommentsOfPosition(commentRange.pos);
}
emitExpression(initializer, parenthesizer.parenthesizeExpressionForDisallowedComma);
}
function emitShorthandPropertyAssignment(node: ShorthandPropertyAssignment) {
emit(node.name);
if (node.objectAssignmentInitializer) {
writeSpace();
writePunctuation("=");
writeSpace();
emitExpression(node.objectAssignmentInitializer, parenthesizer.parenthesizeExpressionForDisallowedComma);
}
}
function emitSpreadAssignment(node: SpreadAssignment) {
if (node.expression) {
emitTokenWithComment(SyntaxKind.DotDotDotToken, node.pos, writePunctuation, node);
emitExpression(node.expression, parenthesizer.parenthesizeExpressionForDisallowedComma);
}
}
//
// Enum
//
function emitEnumMember(node: EnumMember) {
emit(node.name);
emitInitializer(node.initializer, node.name.end, node, parenthesizer.parenthesizeExpressionForDisallowedComma);
}
//
// JSDoc
//
function emitJSDoc(node: JSDoc) {
write("/**");
if (node.comment) {
const text = getTextOfJSDocComment(node.comment);
if (text) {
const lines = text.split(/\r\n?|\n/g);
for (const line of lines) {
writeLine();
writeSpace();
writePunctuation("*");
writeSpace();
write(line);
}
}
}
if (node.tags) {
if (node.tags.length === 1 && node.tags[0].kind === SyntaxKind.JSDocTypeTag && !node.comment) {
writeSpace();
emit(node.tags[0]);
}
else {
emitList(node, node.tags, ListFormat.JSDocComment);
}
}
writeSpace();
write("*/");
}
function emitJSDocSimpleTypedTag(tag: JSDocTypeTag | JSDocThisTag | JSDocEnumTag | JSDocReturnTag) {
emitJSDocTagName(tag.tagName);
emitJSDocTypeExpression(tag.typeExpression);
emitJSDocComment(tag.comment);
}
function emitJSDocSeeTag(tag: JSDocSeeTag) {
emitJSDocTagName(tag.tagName);
emit(tag.name);
emitJSDocComment(tag.comment);
}
function emitJSDocNameReference(node: JSDocNameReference) {
writeSpace();
writePunctuation("{");
emit(node.name);
writePunctuation("}");
}
function emitJSDocHeritageTag(tag: JSDocImplementsTag | JSDocAugmentsTag) {
emitJSDocTagName(tag.tagName);
writeSpace();
writePunctuation("{");
emit(tag.class);
writePunctuation("}");
emitJSDocComment(tag.comment);
}
function emitJSDocTemplateTag(tag: JSDocTemplateTag) {
emitJSDocTagName(tag.tagName);
emitJSDocTypeExpression(tag.constraint);
writeSpace();
emitList(tag, tag.typeParameters, ListFormat.CommaListElements);
emitJSDocComment(tag.comment);
}
function emitJSDocTypedefTag(tag: JSDocTypedefTag) {
emitJSDocTagName(tag.tagName);
if (tag.typeExpression) {
if (tag.typeExpression.kind === SyntaxKind.JSDocTypeExpression) {
emitJSDocTypeExpression(tag.typeExpression);
}
else {
writeSpace();
writePunctuation("{");
write("Object");
if (tag.typeExpression.isArrayType) {
writePunctuation("[");
writePunctuation("]");
}
writePunctuation("}");
}
}
if (tag.fullName) {
writeSpace();
emit(tag.fullName);
}
emitJSDocComment(tag.comment);
if (tag.typeExpression && tag.typeExpression.kind === SyntaxKind.JSDocTypeLiteral) {
emitJSDocTypeLiteral(tag.typeExpression);
}
}
function emitJSDocCallbackTag(tag: JSDocCallbackTag) {
emitJSDocTagName(tag.tagName);
if (tag.name) {
writeSpace();
emit(tag.name);
}
emitJSDocComment(tag.comment);
emitJSDocSignature(tag.typeExpression);
}
function emitJSDocSimpleTag(tag: JSDocTag) {
emitJSDocTagName(tag.tagName);
emitJSDocComment(tag.comment);
}
function emitJSDocTypeLiteral(lit: JSDocTypeLiteral) {
emitList(lit, factory.createNodeArray(lit.jsDocPropertyTags), ListFormat.JSDocComment);
}
function emitJSDocSignature(sig: JSDocSignature) {
if (sig.typeParameters) {
emitList(sig, factory.createNodeArray(sig.typeParameters), ListFormat.JSDocComment);
}
if (sig.parameters) {
emitList(sig, factory.createNodeArray(sig.parameters), ListFormat.JSDocComment);
}
if (sig.type) {
writeLine();
writeSpace();
writePunctuation("*");
writeSpace();
emit(sig.type);
}
}
function emitJSDocPropertyLikeTag(param: JSDocPropertyLikeTag) {
emitJSDocTagName(param.tagName);
emitJSDocTypeExpression(param.typeExpression);
writeSpace();
if (param.isBracketed) {
writePunctuation("[");
}
emit(param.name);
if (param.isBracketed) {
writePunctuation("]");
}
emitJSDocComment(param.comment);
}
function emitJSDocTagName(tagName: Identifier) {
writePunctuation("@");
emit(tagName);
}
function emitJSDocComment(comment: string | NodeArray<JSDocComment> | undefined) {
const text = getTextOfJSDocComment(comment);
if (text) {
writeSpace();
write(text);
}
}
function emitJSDocTypeExpression(typeExpression: JSDocTypeExpression | undefined) {
if (typeExpression) {
writeSpace();
writePunctuation("{");
emit(typeExpression.type);
writePunctuation("}");
}
}
//
// Top-level nodes
//
function emitSourceFile(node: SourceFile) {
writeLine();
const statements = node.statements;
// Emit detached comment if there are no prologue directives or if the first node is synthesized.
// The synthesized node will have no leading comment so some comments may be missed.
const shouldEmitDetachedComment = statements.length === 0 ||
!isPrologueDirective(statements[0]) ||
nodeIsSynthesized(statements[0]);
if (shouldEmitDetachedComment) {
emitBodyWithDetachedComments(node, statements, emitSourceFileWorker);
return;
}
emitSourceFileWorker(node);
}
function emitSyntheticTripleSlashReferencesIfNeeded(node: Bundle) {
emitTripleSlashDirectives(!!node.hasNoDefaultLib, node.syntheticFileReferences || [], node.syntheticTypeReferences || [], node.syntheticLibReferences || []);
for (const prepend of node.prepends) {
if (isUnparsedSource(prepend) && prepend.syntheticReferences) {
for (const ref of prepend.syntheticReferences) {
emit(ref);
writeLine();
}
}
}
}
function emitTripleSlashDirectivesIfNeeded(node: SourceFile) {
if (node.isDeclarationFile) emitTripleSlashDirectives(node.hasNoDefaultLib, node.referencedFiles, node.typeReferenceDirectives, node.libReferenceDirectives);
}
function emitTripleSlashDirectives(hasNoDefaultLib: boolean, files: readonly FileReference[], types: readonly FileReference[], libs: readonly FileReference[]) {
if (hasNoDefaultLib) {
const pos = writer.getTextPos();
writeComment(`/// <reference no-default-lib="true"/>`);
if (bundleFileInfo) bundleFileInfo.sections.push({ pos, end: writer.getTextPos(), kind: BundleFileSectionKind.NoDefaultLib });
writeLine();
}
if (currentSourceFile && currentSourceFile.moduleName) {
writeComment(`/// <amd-module name="${currentSourceFile.moduleName}" />`);
writeLine();
}
if (currentSourceFile && currentSourceFile.amdDependencies) {
for (const dep of currentSourceFile.amdDependencies) {
if (dep.name) {
writeComment(`/// <amd-dependency name="${dep.name}" path="${dep.path}" />`);
}
else {
writeComment(`/// <amd-dependency path="${dep.path}" />`);
}
writeLine();
}
}
for (const directive of files) {
const pos = writer.getTextPos();
writeComment(`/// <reference path="${directive.fileName}" />`);
if (bundleFileInfo) bundleFileInfo.sections.push({ pos, end: writer.getTextPos(), kind: BundleFileSectionKind.Reference, data: directive.fileName });
writeLine();
}
for (const directive of types) {
const pos = writer.getTextPos();
const resolutionMode = directive.resolutionMode && directive.resolutionMode !== currentSourceFile?.impliedNodeFormat
? `resolution-mode="${directive.resolutionMode === ModuleKind.ESNext ? "import" : "require"}"`
: "";
writeComment(`/// <reference types="${directive.fileName}" ${resolutionMode}/>`);
if (bundleFileInfo) bundleFileInfo.sections.push({ pos, end: writer.getTextPos(), kind: !directive.resolutionMode ? BundleFileSectionKind.Type : directive.resolutionMode === ModuleKind.ESNext ? BundleFileSectionKind.TypeResolutionModeImport : BundleFileSectionKind.TypeResolutionModeRequire, data: directive.fileName });
writeLine();
}
for (const directive of libs) {
const pos = writer.getTextPos();
writeComment(`/// <reference lib="${directive.fileName}" />`);
if (bundleFileInfo) bundleFileInfo.sections.push({ pos, end: writer.getTextPos(), kind: BundleFileSectionKind.Lib, data: directive.fileName });
writeLine();
}
}
function emitSourceFileWorker(node: SourceFile) {
const statements = node.statements;
pushNameGenerationScope(node);
forEach(node.statements, generateNames);
emitHelpers(node);
const index = findIndex(statements, statement => !isPrologueDirective(statement));
emitTripleSlashDirectivesIfNeeded(node);
emitList(node, statements, ListFormat.MultiLine, /*parenthesizerRule*/ undefined, index === -1 ? statements.length : index);
popNameGenerationScope(node);
}
// Transformation nodes
function emitPartiallyEmittedExpression(node: PartiallyEmittedExpression) {
const emitFlags = getEmitFlags(node);
if (!(emitFlags & EmitFlags.NoLeadingComments) && node.pos !== node.expression.pos) {
emitTrailingCommentsOfPosition(node.expression.pos);
}
emitExpression(node.expression);
if (!(emitFlags & EmitFlags.NoTrailingComments) && node.end !== node.expression.end) {
emitLeadingCommentsOfPosition(node.expression.end);
}
}
function emitCommaList(node: CommaListExpression) {
emitExpressionList(node, node.elements, ListFormat.CommaListElements, /*parenthesizerRule*/ undefined);
}
/**
* Emits any prologue directives at the start of a Statement list, returning the
* number of prologue directives written to the output.
*/
function emitPrologueDirectives(statements: readonly Node[], sourceFile?: SourceFile, seenPrologueDirectives?: Set<string>, recordBundleFileSection?: true): number {
let needsToSetSourceFile = !!sourceFile;
for (let i = 0; i < statements.length; i++) {
const statement = statements[i];
if (isPrologueDirective(statement)) {
const shouldEmitPrologueDirective = seenPrologueDirectives ? !seenPrologueDirectives.has(statement.expression.text) : true;
if (shouldEmitPrologueDirective) {
if (needsToSetSourceFile) {
needsToSetSourceFile = false;
setSourceFile(sourceFile);
}
writeLine();
const pos = writer.getTextPos();
emit(statement);
if (recordBundleFileSection && bundleFileInfo) bundleFileInfo.sections.push({ pos, end: writer.getTextPos(), kind: BundleFileSectionKind.Prologue, data: statement.expression.text });
if (seenPrologueDirectives) {
seenPrologueDirectives.add(statement.expression.text);
}
}
}
else {
// return index of the first non prologue directive
return i;
}
}
return statements.length;
}
function emitUnparsedPrologues(prologues: readonly UnparsedPrologue[], seenPrologueDirectives: Set<string>) {
for (const prologue of prologues) {
if (!seenPrologueDirectives.has(prologue.data)) {
writeLine();
const pos = writer.getTextPos();
emit(prologue);
if (bundleFileInfo) bundleFileInfo.sections.push({ pos, end: writer.getTextPos(), kind: BundleFileSectionKind.Prologue, data: prologue.data });
if (seenPrologueDirectives) {
seenPrologueDirectives.add(prologue.data);
}
}
}
}
function emitPrologueDirectivesIfNeeded(sourceFileOrBundle: Bundle | SourceFile) {
if (isSourceFile(sourceFileOrBundle)) {
emitPrologueDirectives(sourceFileOrBundle.statements, sourceFileOrBundle);
}
else {
const seenPrologueDirectives = new Set<string>();
for (const prepend of sourceFileOrBundle.prepends) {
emitUnparsedPrologues((prepend as UnparsedSource).prologues, seenPrologueDirectives);
}
for (const sourceFile of sourceFileOrBundle.sourceFiles) {
emitPrologueDirectives(sourceFile.statements, sourceFile, seenPrologueDirectives, /*recordBundleFileSection*/ true);
}
setSourceFile(undefined);
}
}
function getPrologueDirectivesFromBundledSourceFiles(bundle: Bundle): SourceFilePrologueInfo[] | undefined {
const seenPrologueDirectives = new Set<string>();
let prologues: SourceFilePrologueInfo[] | undefined;
for (let index = 0; index < bundle.sourceFiles.length; index++) {
const sourceFile = bundle.sourceFiles[index];
let directives: SourceFilePrologueDirective[] | undefined;
let end = 0;
for (const statement of sourceFile.statements) {
if (!isPrologueDirective(statement)) break;
if (seenPrologueDirectives.has(statement.expression.text)) continue;
seenPrologueDirectives.add(statement.expression.text);
(directives || (directives = [])).push({
pos: statement.pos,
end: statement.end,
expression: {
pos: statement.expression.pos,
end: statement.expression.end,
text: statement.expression.text
}
});
end = end < statement.end ? statement.end : end;
}
if (directives) (prologues || (prologues = [])).push({ file: index, text: sourceFile.text.substring(0, end), directives });
}
return prologues;
}
function emitShebangIfNeeded(sourceFileOrBundle: Bundle | SourceFile | UnparsedSource) {
if (isSourceFile(sourceFileOrBundle) || isUnparsedSource(sourceFileOrBundle)) {
const shebang = getShebang(sourceFileOrBundle.text);
if (shebang) {
writeComment(shebang);
writeLine();
return true;
}
}
else {
for (const prepend of sourceFileOrBundle.prepends) {
Debug.assertNode(prepend, isUnparsedSource);
if (emitShebangIfNeeded(prepend)) {
return true;
}
}
for (const sourceFile of sourceFileOrBundle.sourceFiles) {
// Emit only the first encountered shebang
if (emitShebangIfNeeded(sourceFile)) {
return true;
}
}
}
}
//
// Helpers
//
function emitNodeWithWriter(node: Node | undefined, writer: typeof write) {
if (!node) return;
const savedWrite = write;
write = writer;
emit(node);
write = savedWrite;
}
function emitDecoratorsAndModifiers(node: Node, modifiers: NodeArray<ModifierLike> | undefined) {
if (modifiers?.length) {
if (every(modifiers, isModifier)) {
// if all modifier-likes are `Modifier`, simply emit the array as modifiers.
return emitModifiers(node, modifiers as NodeArray<Modifier>);
}
if (every(modifiers, isDecorator)) {
// if all modifier-likes are `Decorator`, simply emit the array as decorators.
return emitDecorators(node, modifiers as NodeArray<Decorator>);
}
onBeforeEmitNodeArray?.(modifiers);
// partition modifiers into contiguous chunks of `Modifier` or `Decorator`
let lastMode: "modifiers" | "decorators" | undefined;
let mode: "modifiers" | "decorators" | undefined;
let start = 0;
let pos = 0;
while (start < modifiers.length) {
while (pos < modifiers.length) {
const modifier = modifiers[pos];
mode = isDecorator(modifier) ? "decorators" : "modifiers";
if (lastMode === undefined) {
lastMode = mode;
}
else if (mode !== lastMode) {
break;
}
pos++;
}
const textRange: TextRange = { pos: -1, end: -1 };
if (start === 0) textRange.pos = modifiers.pos;
if (pos === modifiers.length - 1) textRange.end = modifiers.end;
emitNodeListItems(
emit,
node,
modifiers,
lastMode === "modifiers" ? ListFormat.Modifiers : ListFormat.Decorators,
/*parenthesizerRule*/ undefined,
start,
pos - start,
/*hasTrailingComma*/ false,
textRange);
start = pos;
lastMode = mode;
pos++;
}
onAfterEmitNodeArray?.(modifiers);
}
}
function emitModifiers(node: Node, modifiers: NodeArray<Modifier> | undefined): void {
emitList(node, modifiers, ListFormat.Modifiers);
}
function emitTypeAnnotation(node: TypeNode | undefined) {
if (node) {
writePunctuation(":");
writeSpace();
emit(node);
}
}
function emitInitializer(node: Expression | undefined, equalCommentStartPos: number, container: Node, parenthesizerRule?: (node: Expression) => Expression) {
if (node) {
writeSpace();
emitTokenWithComment(SyntaxKind.EqualsToken, equalCommentStartPos, writeOperator, container);
writeSpace();
emitExpression(node, parenthesizerRule);
}
}
function emitNodeWithPrefix<T extends Node>(prefix: string, prefixWriter: (s: string) => void, node: T | undefined, emit: (node: T) => void) {
if (node) {
prefixWriter(prefix);
emit(node);
}
}
function emitWithLeadingSpace(node: Node | undefined) {
if (node) {
writeSpace();
emit(node);
}
}
function emitExpressionWithLeadingSpace(node: Expression | undefined, parenthesizerRule?: (node: Expression) => Expression) {
if (node) {
writeSpace();
emitExpression(node, parenthesizerRule);
}
}
function emitWithTrailingSpace(node: Node | undefined) {
if (node) {
emit(node);
writeSpace();
}
}
function emitEmbeddedStatement(parent: Node, node: Statement) {
if (isBlock(node) || getEmitFlags(parent) & EmitFlags.SingleLine) {
writeSpace();
emit(node);
}
else {
writeLine();
increaseIndent();
if (isEmptyStatement(node)) {
pipelineEmit(EmitHint.EmbeddedStatement, node);
}
else {
emit(node);
}
decreaseIndent();
}
}
function emitDecorators(parentNode: Node, decorators: NodeArray<Decorator> | undefined): void {
emitList(parentNode, decorators, ListFormat.Decorators);
}
function emitTypeArguments(parentNode: Node, typeArguments: NodeArray<TypeNode> | undefined) {
emitList(parentNode, typeArguments, ListFormat.TypeArguments, typeArgumentParenthesizerRuleSelector);
}
function emitTypeParameters(parentNode: SignatureDeclaration | InterfaceDeclaration | TypeAliasDeclaration | ClassDeclaration | ClassExpression, typeParameters: NodeArray<TypeParameterDeclaration> | undefined) {
if (isFunctionLike(parentNode) && parentNode.typeArguments) { // Quick info uses type arguments in place of type parameters on instantiated signatures
return emitTypeArguments(parentNode, parentNode.typeArguments);
}
emitList(parentNode, typeParameters, ListFormat.TypeParameters);
}
function emitParameters(parentNode: Node, parameters: NodeArray<ParameterDeclaration>) {
emitList(parentNode, parameters, ListFormat.Parameters);
}
function canEmitSimpleArrowHead(parentNode: FunctionTypeNode | ArrowFunction, parameters: NodeArray<ParameterDeclaration>) {
const parameter = singleOrUndefined(parameters);
return parameter
&& parameter.pos === parentNode.pos // may not have parsed tokens between parent and parameter
&& isArrowFunction(parentNode) // only arrow functions may have simple arrow head
&& !parentNode.type // arrow function may not have return type annotation
&& !some(parentNode.modifiers) // parent may not have decorators or modifiers
&& !some(parentNode.typeParameters) // parent may not have type parameters
&& !some(parameter.modifiers) // parameter may not have decorators or modifiers
&& !parameter.dotDotDotToken // parameter may not be rest
&& !parameter.questionToken // parameter may not be optional
&& !parameter.type // parameter may not have a type annotation
&& !parameter.initializer // parameter may not have an initializer
&& isIdentifier(parameter.name); // parameter name must be identifier
}
function emitParametersForArrow(parentNode: FunctionTypeNode | ArrowFunction, parameters: NodeArray<ParameterDeclaration>) {
if (canEmitSimpleArrowHead(parentNode, parameters)) {
emitList(parentNode, parameters, ListFormat.Parameters & ~ListFormat.Parenthesis);
}
else {
emitParameters(parentNode, parameters);
}
}
function emitParametersForIndexSignature(parentNode: Node, parameters: NodeArray<ParameterDeclaration>) {
emitList(parentNode, parameters, ListFormat.IndexSignatureParameters);
}
function writeDelimiter(format: ListFormat) {
switch (format & ListFormat.DelimitersMask) {
case ListFormat.None:
break;
case ListFormat.CommaDelimited:
writePunctuation(",");
break;
case ListFormat.BarDelimited:
writeSpace();
writePunctuation("|");
break;
case ListFormat.AsteriskDelimited:
writeSpace();
writePunctuation("*");
writeSpace();
break;
case ListFormat.AmpersandDelimited:
writeSpace();
writePunctuation("&");
break;
}
}
function emitList(parentNode: Node | undefined, children: NodeArray<Node> | undefined, format: ListFormat, parenthesizerRule?: ParenthesizerRuleOrSelector<Node>, start?: number, count?: number) {
emitNodeList(emit, parentNode, children, format, parenthesizerRule, start, count);
}
function emitExpressionList(parentNode: Node | undefined, children: NodeArray<Node> | undefined, format: ListFormat, parenthesizerRule?: ParenthesizerRuleOrSelector<Expression>, start?: number, count?: number) {
emitNodeList(emitExpression, parentNode, children, format, parenthesizerRule, start, count);
}
function emitNodeList(emit: (node: Node, parenthesizerRule?: ((node: Node) => Node) | undefined) => void, parentNode: Node | undefined, children: NodeArray<Node> | undefined, format: ListFormat, parenthesizerRule: ParenthesizerRuleOrSelector<Node> | undefined, start = 0, count = children ? children.length - start : 0) {
const isUndefined = children === undefined;
if (isUndefined && format & ListFormat.OptionalIfUndefined) {
return;
}
const isEmpty = children === undefined || start >= children.length || count === 0;
if (isEmpty && format & ListFormat.OptionalIfEmpty) {
onBeforeEmitNodeArray?.(children);
onAfterEmitNodeArray?.(children);
return;
}
if (format & ListFormat.BracketsMask) {
writePunctuation(getOpeningBracket(format));
if (isEmpty && children) {
emitTrailingCommentsOfPosition(children.pos, /*prefixSpace*/ true); // Emit comments within empty bracketed lists
}
}
onBeforeEmitNodeArray?.(children);
if (isEmpty) {
// Write a line terminator if the parent node was multi-line
if (format & ListFormat.MultiLine && !(preserveSourceNewlines && (!parentNode || currentSourceFile && rangeIsOnSingleLine(parentNode, currentSourceFile)))) {
writeLine();
}
else if (format & ListFormat.SpaceBetweenBraces && !(format & ListFormat.NoSpaceIfEmpty)) {
writeSpace();
}
}
else {
emitNodeListItems(emit, parentNode, children, format, parenthesizerRule, start, count, children.hasTrailingComma, children);
}
onAfterEmitNodeArray?.(children);
if (format & ListFormat.BracketsMask) {
if (isEmpty && children) {
emitLeadingCommentsOfPosition(children.end); // Emit leading comments within empty lists
}
writePunctuation(getClosingBracket(format));
}
}
/**
* Emits a list without brackets or raising events.
*
* NOTE: You probably don't want to call this directly and should be using `emitList` or `emitExpressionList` instead.
*/
function emitNodeListItems(emit: (node: Node, parenthesizerRule?: ((node: Node) => Node) | undefined) => void, parentNode: Node | undefined, children: readonly Node[], format: ListFormat, parenthesizerRule: ParenthesizerRuleOrSelector<Node> | undefined, start: number, count: number, hasTrailingComma: boolean, childrenTextRange: TextRange | undefined) {
// Write the opening line terminator or leading whitespace.
const mayEmitInterveningComments = (format & ListFormat.NoInterveningComments) === 0;
let shouldEmitInterveningComments = mayEmitInterveningComments;
const leadingLineTerminatorCount = getLeadingLineTerminatorCount(parentNode, children[start], format);
if (leadingLineTerminatorCount) {
writeLine(leadingLineTerminatorCount);
shouldEmitInterveningComments = false;
}
else if (format & ListFormat.SpaceBetweenBraces) {
writeSpace();
}
// Increase the indent, if requested.
if (format & ListFormat.Indented) {
increaseIndent();
}
const emitListItem = getEmitListItem(emit, parenthesizerRule);
// Emit each child.
let previousSibling: Node | undefined;
let previousSourceFileTextKind: ReturnType<typeof recordBundleFileInternalSectionStart>;
let shouldDecreaseIndentAfterEmit = false;
for (let i = 0; i < count; i++) {
const child = children[start + i];
// Write the delimiter if this is not the first node.
if (format & ListFormat.AsteriskDelimited) {
// always write JSDoc in the format "\n *"
writeLine();
writeDelimiter(format);
}
else if (previousSibling) {
// i.e
// function commentedParameters(
// /* Parameter a */
// a
// /* End of parameter a */ -> this comment isn't considered to be trailing comment of parameter "a" due to newline
// ,
if (format & ListFormat.DelimitersMask && previousSibling.end !== (parentNode ? parentNode.end : -1)) {
emitLeadingCommentsOfPosition(previousSibling.end);
}
writeDelimiter(format);
recordBundleFileInternalSectionEnd(previousSourceFileTextKind);
// Write either a line terminator or whitespace to separate the elements.
const separatingLineTerminatorCount = getSeparatingLineTerminatorCount(previousSibling, child, format);
if (separatingLineTerminatorCount > 0) {
// If a synthesized node in a single-line list starts on a new
// line, we should increase the indent.
if ((format & (ListFormat.LinesMask | ListFormat.Indented)) === ListFormat.SingleLine) {
increaseIndent();
shouldDecreaseIndentAfterEmit = true;
}
writeLine(separatingLineTerminatorCount);
shouldEmitInterveningComments = false;
}
else if (previousSibling && format & ListFormat.SpaceBetweenSiblings) {
writeSpace();
}
}
// Emit this child.
previousSourceFileTextKind = recordBundleFileInternalSectionStart(child);
if (shouldEmitInterveningComments) {
const commentRange = getCommentRange(child);
emitTrailingCommentsOfPosition(commentRange.pos);
}
else {
shouldEmitInterveningComments = mayEmitInterveningComments;
}
nextListElementPos = child.pos;
emitListItem(child, emit, parenthesizerRule, i);
if (shouldDecreaseIndentAfterEmit) {
decreaseIndent();
shouldDecreaseIndentAfterEmit = false;
}
previousSibling = child;
}
// Write a trailing comma, if requested.
const emitFlags = previousSibling ? getEmitFlags(previousSibling) : 0;
const skipTrailingComments = commentsDisabled || !!(emitFlags & EmitFlags.NoTrailingComments);
const emitTrailingComma = hasTrailingComma && (format & ListFormat.AllowTrailingComma) && (format & ListFormat.CommaDelimited);
if (emitTrailingComma) {
if (previousSibling && !skipTrailingComments) {
emitTokenWithComment(SyntaxKind.CommaToken, previousSibling.end, writePunctuation, previousSibling);
}
else {
writePunctuation(",");
}
}
// Emit any trailing comment of the last element in the list
// i.e
// var array = [...
// 2
// /* end of element 2 */
// ];
if (previousSibling && (parentNode ? parentNode.end : -1) !== previousSibling.end && (format & ListFormat.DelimitersMask) && !skipTrailingComments) {
emitLeadingCommentsOfPosition(emitTrailingComma && childrenTextRange?.end ? childrenTextRange.end : previousSibling.end);
}
// Decrease the indent, if requested.
if (format & ListFormat.Indented) {
decreaseIndent();
}
recordBundleFileInternalSectionEnd(previousSourceFileTextKind);
// Write the closing line terminator or closing whitespace.
const closingLineTerminatorCount = getClosingLineTerminatorCount(parentNode, children[start + count - 1], format, childrenTextRange);
if (closingLineTerminatorCount) {
writeLine(closingLineTerminatorCount);
}
else if (format & (ListFormat.SpaceAfterList | ListFormat.SpaceBetweenBraces)) {
writeSpace();
}
}
// Writers
function writeLiteral(s: string) {
writer.writeLiteral(s);
}
function writeStringLiteral(s: string) {
writer.writeStringLiteral(s);
}
function writeBase(s: string) {
writer.write(s);
}
function writeSymbol(s: string, sym: Symbol) {
writer.writeSymbol(s, sym);
}
function writePunctuation(s: string) {
writer.writePunctuation(s);
}
function writeTrailingSemicolon() {
writer.writeTrailingSemicolon(";");
}
function writeKeyword(s: string) {
writer.writeKeyword(s);
}
function writeOperator(s: string) {
writer.writeOperator(s);
}
function writeParameter(s: string) {
writer.writeParameter(s);
}
function writeComment(s: string) {
writer.writeComment(s);
}
function writeSpace() {
writer.writeSpace(" ");
}
function writeProperty(s: string) {
writer.writeProperty(s);
}
function nonEscapingWrite(s: string) {
// This should be defined in a snippet-escaping text writer.
if (writer.nonEscapingWrite) {
writer.nonEscapingWrite(s);
}
else {
writer.write(s);
}
}
function writeLine(count = 1) {
for (let i = 0; i < count; i++) {
writer.writeLine(i > 0);
}
}
function increaseIndent() {
writer.increaseIndent();
}
function decreaseIndent() {
writer.decreaseIndent();
}
function writeToken(token: SyntaxKind, pos: number, writer: (s: string) => void, contextNode?: Node) {
return !sourceMapsDisabled
? emitTokenWithSourceMap(contextNode, token, writer, pos, writeTokenText)
: writeTokenText(token, writer, pos);
}
function writeTokenNode(node: Node, writer: (s: string) => void) {
if (onBeforeEmitToken) {
onBeforeEmitToken(node);
}
writer(tokenToString(node.kind)!);
if (onAfterEmitToken) {
onAfterEmitToken(node);
}
}
function writeTokenText(token: SyntaxKind, writer: (s: string) => void): void;
function writeTokenText(token: SyntaxKind, writer: (s: string) => void, pos: number): number;
function writeTokenText(token: SyntaxKind, writer: (s: string) => void, pos?: number): number {
const tokenString = tokenToString(token)!;
writer(tokenString);
return pos! < 0 ? pos! : pos! + tokenString.length;
}
function writeLineOrSpace(parentNode: Node, prevChildNode: Node, nextChildNode: Node) {
if (getEmitFlags(parentNode) & EmitFlags.SingleLine) {
writeSpace();
}
else if (preserveSourceNewlines) {
const lines = getLinesBetweenNodes(parentNode, prevChildNode, nextChildNode);
if (lines) {
writeLine(lines);
}
else {
writeSpace();
}
}
else {
writeLine();
}
}
function writeLines(text: string): void {
const lines = text.split(/\r\n?|\n/g);
const indentation = guessIndentation(lines);
for (const lineText of lines) {
const line = indentation ? lineText.slice(indentation) : lineText;
if (line.length) {
writeLine();
write(line);
}
}
}
function writeLinesAndIndent(lineCount: number, writeSpaceIfNotIndenting: boolean) {
if (lineCount) {
increaseIndent();
writeLine(lineCount);
}
else if (writeSpaceIfNotIndenting) {
writeSpace();
}
}
// Helper function to decrease the indent if we previously indented. Allows multiple
// previous indent values to be considered at a time. This also allows caller to just
// call this once, passing in all their appropriate indent values, instead of needing
// to call this helper function multiple times.
function decreaseIndentIf(value1: boolean | number | undefined, value2?: boolean | number) {
if (value1) {
decreaseIndent();
}
if (value2) {
decreaseIndent();
}
}
function getLeadingLineTerminatorCount(parentNode: Node | undefined, firstChild: Node | undefined, format: ListFormat): number {
if (format & ListFormat.PreserveLines || preserveSourceNewlines) {
if (format & ListFormat.PreferNewLine) {
return 1;
}
if (firstChild === undefined) {
return !parentNode || currentSourceFile && rangeIsOnSingleLine(parentNode, currentSourceFile) ? 0 : 1;
}
if (firstChild.pos === nextListElementPos) {
// If this child starts at the beginning of a list item in a parent list, its leading
// line terminators have already been written as the separating line terminators of the
// parent list. Example:
//
// class Foo {
// constructor() {}
// public foo() {}
// }
//
// The outer list is the list of class members, with one line terminator between the
// constructor and the method. The constructor is written, the separating line terminator
// is written, and then we start emitting the method. Its modifiers ([public]) constitute an inner
// list, so we look for its leading line terminators. If we didn't know that we had already
// written a newline as part of the parent list, it would appear that we need to write a
// leading newline to start the modifiers.
return 0;
}
if (firstChild.kind === SyntaxKind.JsxText) {
// JsxText will be written with its leading whitespace, so don't add more manually.
return 0;
}
if (currentSourceFile && parentNode &&
!positionIsSynthesized(parentNode.pos) &&
!nodeIsSynthesized(firstChild) &&
(!firstChild.parent || getOriginalNode(firstChild.parent) === getOriginalNode(parentNode))
) {
if (preserveSourceNewlines) {
return getEffectiveLines(
includeComments => getLinesBetweenPositionAndPrecedingNonWhitespaceCharacter(
firstChild.pos,
parentNode.pos,
currentSourceFile!,
includeComments));
}
return rangeStartPositionsAreOnSameLine(parentNode, firstChild, currentSourceFile) ? 0 : 1;
}
if (synthesizedNodeStartsOnNewLine(firstChild, format)) {
return 1;
}
}
return format & ListFormat.MultiLine ? 1 : 0;
}
function getSeparatingLineTerminatorCount(previousNode: Node | undefined, nextNode: Node, format: ListFormat): number {
if (format & ListFormat.PreserveLines || preserveSourceNewlines) {
if (previousNode === undefined || nextNode === undefined) {
return 0;
}
if (nextNode.kind === SyntaxKind.JsxText) {
// JsxText will be written with its leading whitespace, so don't add more manually.
return 0;
}
else if (currentSourceFile && !nodeIsSynthesized(previousNode) && !nodeIsSynthesized(nextNode)) {
if (preserveSourceNewlines && siblingNodePositionsAreComparable(previousNode, nextNode)) {
return getEffectiveLines(
includeComments => getLinesBetweenRangeEndAndRangeStart(
previousNode,
nextNode,
currentSourceFile!,
includeComments));
}
// If `preserveSourceNewlines` is `false` we do not intend to preserve the effective lines between the
// previous and next node. Instead we naively check whether nodes are on separate lines within the
// same node parent. If so, we intend to preserve a single line terminator. This is less precise and
// expensive than checking with `preserveSourceNewlines` as above, but the goal is not to preserve the
// effective source lines between two sibling nodes.
else if (!preserveSourceNewlines && originalNodesHaveSameParent(previousNode, nextNode)) {
return rangeEndIsOnSameLineAsRangeStart(previousNode, nextNode, currentSourceFile) ? 0 : 1;
}
// If the two nodes are not comparable, add a line terminator based on the format that can indicate
// whether new lines are preferred or not.
return format & ListFormat.PreferNewLine ? 1 : 0;
}
else if (synthesizedNodeStartsOnNewLine(previousNode, format) || synthesizedNodeStartsOnNewLine(nextNode, format)) {
return 1;
}
}
else if (getStartsOnNewLine(nextNode)) {
return 1;
}
return format & ListFormat.MultiLine ? 1 : 0;
}
function getClosingLineTerminatorCount(parentNode: Node | undefined, lastChild: Node | undefined, format: ListFormat, childrenTextRange: TextRange | undefined): number {
if (format & ListFormat.PreserveLines || preserveSourceNewlines) {
if (format & ListFormat.PreferNewLine) {
return 1;
}
if (lastChild === undefined) {
return !parentNode || currentSourceFile && rangeIsOnSingleLine(parentNode, currentSourceFile) ? 0 : 1;
}
if (currentSourceFile && parentNode && !positionIsSynthesized(parentNode.pos) && !nodeIsSynthesized(lastChild) && (!lastChild.parent || lastChild.parent === parentNode)) {
if (preserveSourceNewlines) {
const end = childrenTextRange && !positionIsSynthesized(childrenTextRange.end) ? childrenTextRange.end : lastChild.end;
return getEffectiveLines(
includeComments => getLinesBetweenPositionAndNextNonWhitespaceCharacter(
end,
parentNode.end,
currentSourceFile!,
includeComments));
}
return rangeEndPositionsAreOnSameLine(parentNode, lastChild, currentSourceFile) ? 0 : 1;
}
if (synthesizedNodeStartsOnNewLine(lastChild, format)) {
return 1;
}
}
if (format & ListFormat.MultiLine && !(format & ListFormat.NoTrailingNewLine)) {
return 1;
}
return 0;
}
function getEffectiveLines(getLineDifference: (includeComments: boolean) => number) {
// If 'preserveSourceNewlines' is disabled, we should never call this function
// because it could be more expensive than alternative approximations.
Debug.assert(!!preserveSourceNewlines);
// We start by measuring the line difference from a position to its adjacent comments,
// so that this is counted as a one-line difference, not two:
//
// node1;
// // NODE2 COMMENT
// node2;
const lines = getLineDifference(/*includeComments*/ true);
if (lines === 0) {
// However, if the line difference considering comments was 0, we might have this:
//
// node1; // NODE2 COMMENT
// node2;
//
// in which case we should be ignoring node2's comment, so this too is counted as
// a one-line difference, not zero.
return getLineDifference(/*includeComments*/ false);
}
return lines;
}
function writeLineSeparatorsAndIndentBefore(node: Node, parent: Node): boolean {
const leadingNewlines = preserveSourceNewlines && getLeadingLineTerminatorCount(parent, node, ListFormat.None);
if (leadingNewlines) {
writeLinesAndIndent(leadingNewlines, /*writeSpaceIfNotIndenting*/ false);
}
return !!leadingNewlines;
}
function writeLineSeparatorsAfter(node: Node, parent: Node) {
const trailingNewlines = preserveSourceNewlines && getClosingLineTerminatorCount(parent, node, ListFormat.None, /*childrenTextRange*/ undefined);
if (trailingNewlines) {
writeLine(trailingNewlines);
}
}
function synthesizedNodeStartsOnNewLine(node: Node, format: ListFormat) {
if (nodeIsSynthesized(node)) {
const startsOnNewLine = getStartsOnNewLine(node);
if (startsOnNewLine === undefined) {
return (format & ListFormat.PreferNewLine) !== 0;
}
return startsOnNewLine;
}
return (format & ListFormat.PreferNewLine) !== 0;
}
function getLinesBetweenNodes(parent: Node, node1: Node, node2: Node): number {
if (getEmitFlags(parent) & EmitFlags.NoIndentation) {
return 0;
}
parent = skipSynthesizedParentheses(parent);
node1 = skipSynthesizedParentheses(node1);
node2 = skipSynthesizedParentheses(node2);
// Always use a newline for synthesized code if the synthesizer desires it.
if (getStartsOnNewLine(node2)) {
return 1;
}
if (currentSourceFile && !nodeIsSynthesized(parent) && !nodeIsSynthesized(node1) && !nodeIsSynthesized(node2)) {
if (preserveSourceNewlines) {
return getEffectiveLines(
includeComments => getLinesBetweenRangeEndAndRangeStart(
node1,
node2,
currentSourceFile!,
includeComments));
}
return rangeEndIsOnSameLineAsRangeStart(node1, node2, currentSourceFile) ? 0 : 1;
}
return 0;
}
function isEmptyBlock(block: BlockLike) {
return block.statements.length === 0
&& (!currentSourceFile || rangeEndIsOnSameLineAsRangeStart(block, block, currentSourceFile));
}
function skipSynthesizedParentheses(node: Node) {
while (node.kind === SyntaxKind.ParenthesizedExpression && nodeIsSynthesized(node)) {
node = (node as ParenthesizedExpression).expression;
}
return node;
}
function getTextOfNode(node: Identifier | PrivateIdentifier | LiteralExpression, includeTrivia?: boolean): string {
if (isGeneratedIdentifier(node)) {
return generateName(node);
}
if (isStringLiteral(node) && node.textSourceNode) {
return getTextOfNode(node.textSourceNode, includeTrivia);
}
const sourceFile = currentSourceFile; // const needed for control flow
const canUseSourceFile = !!sourceFile && !!node.parent && !nodeIsSynthesized(node);
if (isMemberName(node)) {
if (!canUseSourceFile || getSourceFileOfNode(node) !== getOriginalNode(sourceFile)) {
return idText(node);
}
}
else {
Debug.assertNode(node, isLiteralExpression); // not strictly necessary
if (!canUseSourceFile) {
return node.text;
}
}
return getSourceTextOfNodeFromSourceFile(sourceFile, node, includeTrivia);
}
function getLiteralTextOfNode(node: LiteralLikeNode, neverAsciiEscape: boolean | undefined, jsxAttributeEscape: boolean): string {
if (node.kind === SyntaxKind.StringLiteral && (node as StringLiteral).textSourceNode) {
const textSourceNode = (node as StringLiteral).textSourceNode!;
if (isIdentifier(textSourceNode) || isNumericLiteral(textSourceNode)) {
const text = isNumericLiteral(textSourceNode) ? textSourceNode.text : getTextOfNode(textSourceNode);
return jsxAttributeEscape ? `"${escapeJsxAttributeString(text)}"` :
neverAsciiEscape || (getEmitFlags(node) & EmitFlags.NoAsciiEscaping) ? `"${escapeString(text)}"` :
`"${escapeNonAsciiString(text)}"`;
}
else {
return getLiteralTextOfNode(textSourceNode, neverAsciiEscape, jsxAttributeEscape);
}
}
const flags = (neverAsciiEscape ? GetLiteralTextFlags.NeverAsciiEscape : 0)
| (jsxAttributeEscape ? GetLiteralTextFlags.JsxAttributeEscape : 0)
| (printerOptions.terminateUnterminatedLiterals ? GetLiteralTextFlags.TerminateUnterminatedLiterals : 0)
| (printerOptions.target && printerOptions.target === ScriptTarget.ESNext ? GetLiteralTextFlags.AllowNumericSeparator : 0);
return getLiteralText(node, currentSourceFile, flags);
}
/**
* Push a new name generation scope.
*/
function pushNameGenerationScope(node: Node | undefined) {
if (node && getEmitFlags(node) & EmitFlags.ReuseTempVariableScope) {
return;
}
tempFlagsStack.push(tempFlags);
tempFlags = 0;
reservedNamesStack.push(reservedNames);
}
/**
* Pop the current name generation scope.
*/
function popNameGenerationScope(node: Node | undefined) {
if (node && getEmitFlags(node) & EmitFlags.ReuseTempVariableScope) {
return;
}
tempFlags = tempFlagsStack.pop()!;
reservedNames = reservedNamesStack.pop()!;
}
function reserveNameInNestedScopes(name: string) {
if (!reservedNames || reservedNames === lastOrUndefined(reservedNamesStack)) {
reservedNames = new Set();
}
reservedNames.add(name);
}
function generateNames(node: Node | undefined) {
if (!node) return;
switch (node.kind) {
case SyntaxKind.Block:
forEach((node as Block).statements, generateNames);
break;
case SyntaxKind.LabeledStatement:
case SyntaxKind.WithStatement:
case SyntaxKind.DoStatement:
case SyntaxKind.WhileStatement:
generateNames((node as LabeledStatement | WithStatement | DoStatement | WhileStatement).statement);
break;
case SyntaxKind.IfStatement:
generateNames((node as IfStatement).thenStatement);
generateNames((node as IfStatement).elseStatement);
break;
case SyntaxKind.ForStatement:
case SyntaxKind.ForOfStatement:
case SyntaxKind.ForInStatement:
generateNames((node as ForStatement | ForInOrOfStatement).initializer);
generateNames((node as ForStatement | ForInOrOfStatement).statement);
break;
case SyntaxKind.SwitchStatement:
generateNames((node as SwitchStatement).caseBlock);
break;
case SyntaxKind.CaseBlock:
forEach((node as CaseBlock).clauses, generateNames);
break;
case SyntaxKind.CaseClause:
case SyntaxKind.DefaultClause:
forEach((node as CaseOrDefaultClause).statements, generateNames);
break;
case SyntaxKind.TryStatement:
generateNames((node as TryStatement).tryBlock);
generateNames((node as TryStatement).catchClause);
generateNames((node as TryStatement).finallyBlock);
break;
case SyntaxKind.CatchClause:
generateNames((node as CatchClause).variableDeclaration);
generateNames((node as CatchClause).block);
break;
case SyntaxKind.VariableStatement:
generateNames((node as VariableStatement).declarationList);
break;
case SyntaxKind.VariableDeclarationList:
forEach((node as VariableDeclarationList).declarations, generateNames);
break;
case SyntaxKind.VariableDeclaration:
case SyntaxKind.Parameter:
case SyntaxKind.BindingElement:
case SyntaxKind.ClassDeclaration:
generateNameIfNeeded((node as NamedDeclaration).name);
break;
case SyntaxKind.FunctionDeclaration:
generateNameIfNeeded((node as FunctionDeclaration).name);
if (getEmitFlags(node) & EmitFlags.ReuseTempVariableScope) {
forEach((node as FunctionDeclaration).parameters, generateNames);
generateNames((node as FunctionDeclaration).body);
}
break;
case SyntaxKind.ObjectBindingPattern:
case SyntaxKind.ArrayBindingPattern:
forEach((node as BindingPattern).elements, generateNames);
break;
case SyntaxKind.ImportDeclaration:
generateNames((node as ImportDeclaration).importClause);
break;
case SyntaxKind.ImportClause:
generateNameIfNeeded((node as ImportClause).name);
generateNames((node as ImportClause).namedBindings);
break;
case SyntaxKind.NamespaceImport:
generateNameIfNeeded((node as NamespaceImport).name);
break;
case SyntaxKind.NamespaceExport:
generateNameIfNeeded((node as NamespaceExport).name);
break;
case SyntaxKind.NamedImports:
forEach((node as NamedImports).elements, generateNames);
break;
case SyntaxKind.ImportSpecifier:
generateNameIfNeeded((node as ImportSpecifier).propertyName || (node as ImportSpecifier).name);
break;
}
}
function generateMemberNames(node: Node | undefined) {
if (!node) return;
switch (node.kind) {
case SyntaxKind.PropertyAssignment:
case SyntaxKind.ShorthandPropertyAssignment:
case SyntaxKind.PropertyDeclaration:
case SyntaxKind.MethodDeclaration:
case SyntaxKind.GetAccessor:
case SyntaxKind.SetAccessor:
generateNameIfNeeded((node as NamedDeclaration).name);
break;
}
}
function generateNameIfNeeded(name: DeclarationName | undefined) {
if (name) {
if (isGeneratedIdentifier(name)) {
generateName(name);
}
else if (isBindingPattern(name)) {
generateNames(name);
}
}
}
/**
* Generate the text for a generated identifier.
*/
function generateName(name: GeneratedIdentifier) {
if ((name.autoGenerateFlags & GeneratedIdentifierFlags.KindMask) === GeneratedIdentifierFlags.Node) {
// Node names generate unique names based on their original node
// and are cached based on that node's id.
return generateNameCached(getNodeForGeneratedName(name), name.autoGenerateFlags);
}
else {
// Auto, Loop, and Unique names are cached based on their unique
// autoGenerateId.
const autoGenerateId = name.autoGenerateId!;
return autoGeneratedIdToGeneratedName[autoGenerateId] || (autoGeneratedIdToGeneratedName[autoGenerateId] = makeName(name));
}
}
function generateNameCached(node: Node, flags?: GeneratedIdentifierFlags) {
const nodeId = getNodeId(node);
return nodeIdToGeneratedName[nodeId] || (nodeIdToGeneratedName[nodeId] = generateNameForNode(node, flags));
}
/**
* Returns a value indicating whether a name is unique globally, within the current file,
* or within the NameGenerator.
*/
function isUniqueName(name: string): boolean {
return isFileLevelUniqueName(name)
&& !generatedNames.has(name)
&& !(reservedNames && reservedNames.has(name));
}
/**
* Returns a value indicating whether a name is unique globally or within the current file.
*/
function isFileLevelUniqueName(name: string) {
return currentSourceFile ? ts.isFileLevelUniqueName(currentSourceFile, name, hasGlobalName) : true;
}
/**
* Returns a value indicating whether a name is unique within a container.
*/
function isUniqueLocalName(name: string, container: Node): boolean {
for (let node = container; isNodeDescendantOf(node, container); node = node.nextContainer!) {
if (node.locals) {
const local = node.locals.get(escapeLeadingUnderscores(name));
// We conservatively include alias symbols to cover cases where they're emitted as locals
if (local && local.flags & (SymbolFlags.Value | SymbolFlags.ExportValue | SymbolFlags.Alias)) {
return false;
}
}
}
return true;
}
/**
* Return the next available name in the pattern _a ... _z, _0, _1, ...
* TempFlags._i or TempFlags._n may be used to express a preference for that dedicated name.
* Note that names generated by makeTempVariableName and makeUniqueName will never conflict.
*/
function makeTempVariableName(flags: TempFlags, reservedInNestedScopes?: boolean): string {
if (flags && !(tempFlags & flags)) {
const name = flags === TempFlags._i ? "_i" : "_n";
if (isUniqueName(name)) {
tempFlags |= flags;
if (reservedInNestedScopes) {
reserveNameInNestedScopes(name);
}
return name;
}
}
while (true) {
const count = tempFlags & TempFlags.CountMask;
tempFlags++;
// Skip over 'i' and 'n'
if (count !== 8 && count !== 13) {
const name = count < 26
? "_" + String.fromCharCode(CharacterCodes.a + count)
: "_" + (count - 26);
if (isUniqueName(name)) {
if (reservedInNestedScopes) {
reserveNameInNestedScopes(name);
}
return name;
}
}
}
}
/**
* Generate a name that is unique within the current file and doesn't conflict with any names
* in global scope. The name is formed by adding an '_n' suffix to the specified base name,
* where n is a positive integer. Note that names generated by makeTempVariableName and
* makeUniqueName are guaranteed to never conflict.
* If `optimistic` is set, the first instance will use 'baseName' verbatim instead of 'baseName_1'
*/
function makeUniqueName(baseName: string, checkFn: (name: string) => boolean = isUniqueName, optimistic?: boolean, scoped?: boolean): string {
if (optimistic) {
if (checkFn(baseName)) {
if (scoped) {
reserveNameInNestedScopes(baseName);
}
else {
generatedNames.add(baseName);
}
return baseName;
}
}
// Find the first unique 'name_n', where n is a positive number
if (baseName.charCodeAt(baseName.length - 1) !== CharacterCodes._) {
baseName += "_";
}
let i = 1;
while (true) {
const generatedName = baseName + i;
if (checkFn(generatedName)) {
if (scoped) {
reserveNameInNestedScopes(generatedName);
}
else {
generatedNames.add(generatedName);
}
return generatedName;
}
i++;
}
}
function makeFileLevelOptimisticUniqueName(name: string) {
return makeUniqueName(name, isFileLevelUniqueName, /*optimistic*/ true);
}
/**
* Generates a unique name for a ModuleDeclaration or EnumDeclaration.
*/
function generateNameForModuleOrEnum(node: ModuleDeclaration | EnumDeclaration) {
const name = getTextOfNode(node.name);
// Use module/enum name itself if it is unique, otherwise make a unique variation
return isUniqueLocalName(name, node) ? name : makeUniqueName(name);
}
/**
* Generates a unique name for an ImportDeclaration or ExportDeclaration.
*/
function generateNameForImportOrExportDeclaration(node: ImportDeclaration | ExportDeclaration) {
const expr = getExternalModuleName(node)!; // TODO: GH#18217
const baseName = isStringLiteral(expr) ?
makeIdentifierFromModuleName(expr.text) : "module";
return makeUniqueName(baseName);
}
/**
* Generates a unique name for a default export.
*/
function generateNameForExportDefault() {
return makeUniqueName("default");
}
/**
* Generates a unique name for a class expression.
*/
function generateNameForClassExpression() {
return makeUniqueName("class");
}
function generateNameForMethodOrAccessor(node: MethodDeclaration | AccessorDeclaration) {
if (isIdentifier(node.name)) {
return generateNameCached(node.name);
}
return makeTempVariableName(TempFlags.Auto);
}
/**
* Generates a unique name from a node.
*/
function generateNameForNode(node: Node, flags?: GeneratedIdentifierFlags): string {
switch (node.kind) {
case SyntaxKind.Identifier:
return makeUniqueName(
getTextOfNode(node as Identifier),
isUniqueName,
!!(flags! & GeneratedIdentifierFlags.Optimistic),
!!(flags! & GeneratedIdentifierFlags.ReservedInNestedScopes)
);
case SyntaxKind.ModuleDeclaration:
case SyntaxKind.EnumDeclaration:
return generateNameForModuleOrEnum(node as ModuleDeclaration | EnumDeclaration);
case SyntaxKind.ImportDeclaration:
case SyntaxKind.ExportDeclaration:
return generateNameForImportOrExportDeclaration(node as ImportDeclaration | ExportDeclaration);
case SyntaxKind.FunctionDeclaration:
case SyntaxKind.ClassDeclaration:
case SyntaxKind.ExportAssignment:
return generateNameForExportDefault();
case SyntaxKind.ClassExpression:
return generateNameForClassExpression();
case SyntaxKind.MethodDeclaration:
case SyntaxKind.GetAccessor:
case SyntaxKind.SetAccessor:
return generateNameForMethodOrAccessor(node as MethodDeclaration | AccessorDeclaration);
case SyntaxKind.ComputedPropertyName:
return makeTempVariableName(TempFlags.Auto, /*reserveInNestedScopes*/ true);
default:
return makeTempVariableName(TempFlags.Auto);
}
}
/**
* Generates a unique identifier for a node.
*/
function makeName(name: GeneratedIdentifier) {
switch (name.autoGenerateFlags & GeneratedIdentifierFlags.KindMask) {
case GeneratedIdentifierFlags.Auto:
return makeTempVariableName(TempFlags.Auto, !!(name.autoGenerateFlags & GeneratedIdentifierFlags.ReservedInNestedScopes));
case GeneratedIdentifierFlags.Loop:
return makeTempVariableName(TempFlags._i, !!(name.autoGenerateFlags & GeneratedIdentifierFlags.ReservedInNestedScopes));
case GeneratedIdentifierFlags.Unique:
return makeUniqueName(
idText(name),
(name.autoGenerateFlags & GeneratedIdentifierFlags.FileLevel) ? isFileLevelUniqueName : isUniqueName,
!!(name.autoGenerateFlags & GeneratedIdentifierFlags.Optimistic),
!!(name.autoGenerateFlags & GeneratedIdentifierFlags.ReservedInNestedScopes)
);
}
return Debug.fail("Unsupported GeneratedIdentifierKind.");
}
/**
* Gets the node from which a name should be generated.
*/
function getNodeForGeneratedName(name: GeneratedIdentifier) {
const autoGenerateId = name.autoGenerateId;
let node = name as Node;
let original = node.original;
while (original) {
node = original;
// if "node" is a different generated name (having a different
// "autoGenerateId"), use it and stop traversing.
if (isIdentifier(node)
&& !!(node.autoGenerateFlags! & GeneratedIdentifierFlags.Node)
&& node.autoGenerateId !== autoGenerateId) {
break;
}
original = node.original;
}
// otherwise, return the original node for the source;
return node;
}
// Comments
function pipelineEmitWithComments(hint: EmitHint, node: Node) {
const pipelinePhase = getNextPipelinePhase(PipelinePhase.Comments, hint, node);
const savedContainerPos = containerPos;
const savedContainerEnd = containerEnd;
const savedDeclarationListContainerEnd = declarationListContainerEnd;
emitCommentsBeforeNode(node);
pipelinePhase(hint, node);
emitCommentsAfterNode(node, savedContainerPos, savedContainerEnd, savedDeclarationListContainerEnd);
}
function emitCommentsBeforeNode(node: Node) {
const emitFlags = getEmitFlags(node);
const commentRange = getCommentRange(node);
// Emit leading comments
emitLeadingCommentsOfNode(node, emitFlags, commentRange.pos, commentRange.end);
if (emitFlags & EmitFlags.NoNestedComments) {
commentsDisabled = true;
}
}
function emitCommentsAfterNode(node: Node, savedContainerPos: number, savedContainerEnd: number, savedDeclarationListContainerEnd: number) {
const emitFlags = getEmitFlags(node);
const commentRange = getCommentRange(node);
// Emit trailing comments
if (emitFlags & EmitFlags.NoNestedComments) {
commentsDisabled = false;
}
emitTrailingCommentsOfNode(node, emitFlags, commentRange.pos, commentRange.end, savedContainerPos, savedContainerEnd, savedDeclarationListContainerEnd);
const typeNode = getTypeNode(node);
if (typeNode) {
emitTrailingCommentsOfNode(node, emitFlags, typeNode.pos, typeNode.end, savedContainerPos, savedContainerEnd, savedDeclarationListContainerEnd);
}
}
function emitLeadingCommentsOfNode(node: Node, emitFlags: EmitFlags, pos: number, end: number) {
enterComment();
hasWrittenComment = false;
// We have to explicitly check that the node is JsxText because if the compilerOptions.jsx is "preserve" we will not do any transformation.
// It is expensive to walk entire tree just to set one kind of node to have no comments.
const skipLeadingComments = pos < 0 || (emitFlags & EmitFlags.NoLeadingComments) !== 0 || node.kind === SyntaxKind.JsxText;
const skipTrailingComments = end < 0 || (emitFlags & EmitFlags.NoTrailingComments) !== 0 || node.kind === SyntaxKind.JsxText;
// Save current container state on the stack.
if ((pos > 0 || end > 0) && pos !== end) {
// Emit leading comments if the position is not synthesized and the node
// has not opted out from emitting leading comments.
if (!skipLeadingComments) {
emitLeadingComments(pos, /*isEmittedNode*/ node.kind !== SyntaxKind.NotEmittedStatement);
}
if (!skipLeadingComments || (pos >= 0 && (emitFlags & EmitFlags.NoLeadingComments) !== 0)) {
// Advance the container position if comments get emitted or if they've been disabled explicitly using NoLeadingComments.
containerPos = pos;
}
if (!skipTrailingComments || (end >= 0 && (emitFlags & EmitFlags.NoTrailingComments) !== 0)) {
// As above.
containerEnd = end;
// To avoid invalid comment emit in a down-level binding pattern, we
// keep track of the last declaration list container's end
if (node.kind === SyntaxKind.VariableDeclarationList) {
declarationListContainerEnd = end;
}
}
}
forEach(getSyntheticLeadingComments(node), emitLeadingSynthesizedComment);
exitComment();
}
function emitTrailingCommentsOfNode(node: Node, emitFlags: EmitFlags, pos: number, end: number, savedContainerPos: number, savedContainerEnd: number, savedDeclarationListContainerEnd: number) {
enterComment();
const skipTrailingComments = end < 0 || (emitFlags & EmitFlags.NoTrailingComments) !== 0 || node.kind === SyntaxKind.JsxText;
forEach(getSyntheticTrailingComments(node), emitTrailingSynthesizedComment);
if ((pos > 0 || end > 0) && pos !== end) {
// Restore previous container state.
containerPos = savedContainerPos;
containerEnd = savedContainerEnd;
declarationListContainerEnd = savedDeclarationListContainerEnd;
// Emit trailing comments if the position is not synthesized and the node
// has not opted out from emitting leading comments and is an emitted node.
if (!skipTrailingComments && node.kind !== SyntaxKind.NotEmittedStatement) {
emitTrailingComments(end);
}
}
exitComment();
}
function emitLeadingSynthesizedComment(comment: SynthesizedComment) {
if (comment.hasLeadingNewline || comment.kind === SyntaxKind.SingleLineCommentTrivia) {
writer.writeLine();
}
writeSynthesizedComment(comment);
if (comment.hasTrailingNewLine || comment.kind === SyntaxKind.SingleLineCommentTrivia) {
writer.writeLine();
}
else {
writer.writeSpace(" ");
}
}
function emitTrailingSynthesizedComment(comment: SynthesizedComment) {
if (!writer.isAtStartOfLine()) {
writer.writeSpace(" ");
}
writeSynthesizedComment(comment);
if (comment.hasTrailingNewLine) {
writer.writeLine();
}
}
function writeSynthesizedComment(comment: SynthesizedComment) {
const text = formatSynthesizedComment(comment);
const lineMap = comment.kind === SyntaxKind.MultiLineCommentTrivia ? computeLineStarts(text) : undefined;
writeCommentRange(text, lineMap!, writer, 0, text.length, newLine);
}
function formatSynthesizedComment(comment: SynthesizedComment) {
return comment.kind === SyntaxKind.MultiLineCommentTrivia
? `/*${comment.text}*/`
: `//${comment.text}`;
}
function emitBodyWithDetachedComments(node: Node, detachedRange: TextRange, emitCallback: (node: Node) => void) {
enterComment();
const { pos, end } = detachedRange;
const emitFlags = getEmitFlags(node);
const skipLeadingComments = pos < 0 || (emitFlags & EmitFlags.NoLeadingComments) !== 0;
const skipTrailingComments = commentsDisabled || end < 0 || (emitFlags & EmitFlags.NoTrailingComments) !== 0;
if (!skipLeadingComments) {
emitDetachedCommentsAndUpdateCommentsInfo(detachedRange);
}
exitComment();
if (emitFlags & EmitFlags.NoNestedComments && !commentsDisabled) {
commentsDisabled = true;
emitCallback(node);
commentsDisabled = false;
}
else {
emitCallback(node);
}
enterComment();
if (!skipTrailingComments) {
emitLeadingComments(detachedRange.end, /*isEmittedNode*/ true);
if (hasWrittenComment && !writer.isAtStartOfLine()) {
writer.writeLine();
}
}
exitComment();
}
function originalNodesHaveSameParent(nodeA: Node, nodeB: Node) {
nodeA = getOriginalNode(nodeA);
// For performance, do not call `getOriginalNode` for `nodeB` if `nodeA` doesn't even
// have a parent node.
return nodeA.parent && nodeA.parent === getOriginalNode(nodeB).parent;
}
function siblingNodePositionsAreComparable(previousNode: Node, nextNode: Node) {
if (nextNode.pos < previousNode.end) {
return false;
}
previousNode = getOriginalNode(previousNode);
nextNode = getOriginalNode(nextNode);
const parent = previousNode.parent;
if (!parent || parent !== nextNode.parent) {
return false;
}
const parentNodeArray = getContainingNodeArray(previousNode);
const prevNodeIndex = parentNodeArray?.indexOf(previousNode);
return prevNodeIndex !== undefined && prevNodeIndex > -1 && parentNodeArray!.indexOf(nextNode) === prevNodeIndex + 1;
}
function emitLeadingComments(pos: number, isEmittedNode: boolean) {
hasWrittenComment = false;
if (isEmittedNode) {
if (pos === 0 && currentSourceFile?.isDeclarationFile) {
forEachLeadingCommentToEmit(pos, emitNonTripleSlashLeadingComment);
}
else {
forEachLeadingCommentToEmit(pos, emitLeadingComment);
}
}
else if (pos === 0) {
// If the node will not be emitted in JS, remove all the comments(normal, pinned and ///) associated with the node,
// unless it is a triple slash comment at the top of the file.
// For Example:
// /// <reference-path ...>
// declare var x;
// /// <reference-path ...>
// interface F {}
// The first /// will NOT be removed while the second one will be removed even though both node will not be emitted
forEachLeadingCommentToEmit(pos, emitTripleSlashLeadingComment);
}
}
function emitTripleSlashLeadingComment(commentPos: number, commentEnd: number, kind: SyntaxKind, hasTrailingNewLine: boolean, rangePos: number) {
if (isTripleSlashComment(commentPos, commentEnd)) {
emitLeadingComment(commentPos, commentEnd, kind, hasTrailingNewLine, rangePos);
}
}
function emitNonTripleSlashLeadingComment(commentPos: number, commentEnd: number, kind: SyntaxKind, hasTrailingNewLine: boolean, rangePos: number) {
if (!isTripleSlashComment(commentPos, commentEnd)) {
emitLeadingComment(commentPos, commentEnd, kind, hasTrailingNewLine, rangePos);
}
}
function shouldWriteComment(text: string, pos: number) {
if (printerOptions.onlyPrintJsDocStyle) {
return (isJSDocLikeText(text, pos) || isPinnedComment(text, pos));
}
return true;
}
function emitLeadingComment(commentPos: number, commentEnd: number, kind: SyntaxKind, hasTrailingNewLine: boolean, rangePos: number) {
if (!currentSourceFile || !shouldWriteComment(currentSourceFile.text, commentPos)) return;
if (!hasWrittenComment) {
emitNewLineBeforeLeadingCommentOfPosition(getCurrentLineMap(), writer, rangePos, commentPos);
hasWrittenComment = true;
}
// Leading comments are emitted at /*leading comment1 */space/*leading comment*/space
emitPos(commentPos);
writeCommentRange(currentSourceFile.text, getCurrentLineMap(), writer, commentPos, commentEnd, newLine);
emitPos(commentEnd);
if (hasTrailingNewLine) {
writer.writeLine();
}
else if (kind === SyntaxKind.MultiLineCommentTrivia) {
writer.writeSpace(" ");
}
}
function emitLeadingCommentsOfPosition(pos: number) {
if (commentsDisabled || pos === -1) {
return;
}
emitLeadingComments(pos, /*isEmittedNode*/ true);
}
function emitTrailingComments(pos: number) {
forEachTrailingCommentToEmit(pos, emitTrailingComment);
}
function emitTrailingComment(commentPos: number, commentEnd: number, _kind: SyntaxKind, hasTrailingNewLine: boolean) {
if (!currentSourceFile || !shouldWriteComment(currentSourceFile.text, commentPos)) return;
// trailing comments are emitted at space/*trailing comment1 */space/*trailing comment2*/
if (!writer.isAtStartOfLine()) {
writer.writeSpace(" ");
}
emitPos(commentPos);
writeCommentRange(currentSourceFile.text, getCurrentLineMap(), writer, commentPos, commentEnd, newLine);
emitPos(commentEnd);
if (hasTrailingNewLine) {
writer.writeLine();
}
}
function emitTrailingCommentsOfPosition(pos: number, prefixSpace?: boolean, forceNoNewline?: boolean) {
if (commentsDisabled) {
return;
}
enterComment();
forEachTrailingCommentToEmit(pos, prefixSpace ? emitTrailingComment : forceNoNewline ? emitTrailingCommentOfPositionNoNewline : emitTrailingCommentOfPosition);
exitComment();
}
function emitTrailingCommentOfPositionNoNewline(commentPos: number, commentEnd: number, kind: SyntaxKind) {
if (!currentSourceFile) return;
// trailing comments of a position are emitted at /*trailing comment1 */space/*trailing comment*/space
emitPos(commentPos);
writeCommentRange(currentSourceFile.text, getCurrentLineMap(), writer, commentPos, commentEnd, newLine);
emitPos(commentEnd);
if (kind === SyntaxKind.SingleLineCommentTrivia) {
writer.writeLine(); // still write a newline for single-line comments, so closing tokens aren't written on the same line
}
}
function emitTrailingCommentOfPosition(commentPos: number, commentEnd: number, _kind: SyntaxKind, hasTrailingNewLine: boolean) {
if(!currentSourceFile) return;
// trailing comments of a position are emitted at /*trailing comment1 */space/*trailing comment*/space
emitPos(commentPos);
writeCommentRange(currentSourceFile.text, getCurrentLineMap(), writer, commentPos, commentEnd, newLine);
emitPos(commentEnd);
if (hasTrailingNewLine) {
writer.writeLine();
}
else {
writer.writeSpace(" ");
}
}
function forEachLeadingCommentToEmit(pos: number, cb: (commentPos: number, commentEnd: number, kind: SyntaxKind, hasTrailingNewLine: boolean, rangePos: number) => void) {
// Emit the leading comments only if the container's pos doesn't match because the container should take care of emitting these comments
if (currentSourceFile && (containerPos === -1 || pos !== containerPos)) {
if (hasDetachedComments(pos)) {
forEachLeadingCommentWithoutDetachedComments(cb);
}
else {
forEachLeadingCommentRange(currentSourceFile.text, pos, cb, /*state*/ pos);
}
}
}
function forEachTrailingCommentToEmit(end: number, cb: (commentPos: number, commentEnd: number, kind: SyntaxKind, hasTrailingNewLine: boolean) => void) {
// Emit the trailing comments only if the container's end doesn't match because the container should take care of emitting these comments
if (currentSourceFile && (containerEnd === -1 || (end !== containerEnd && end !== declarationListContainerEnd))) {
forEachTrailingCommentRange(currentSourceFile.text, end, cb);
}
}
function hasDetachedComments(pos: number) {
return detachedCommentsInfo !== undefined && last(detachedCommentsInfo).nodePos === pos;
}
function forEachLeadingCommentWithoutDetachedComments(cb: (commentPos: number, commentEnd: number, kind: SyntaxKind, hasTrailingNewLine: boolean, rangePos: number) => void) {
if (!currentSourceFile) return;
// get the leading comments from detachedPos
const pos = last(detachedCommentsInfo!).detachedCommentEndPos;
if (detachedCommentsInfo!.length - 1) {
detachedCommentsInfo!.pop();
}
else {
detachedCommentsInfo = undefined;
}
forEachLeadingCommentRange(currentSourceFile.text, pos, cb, /*state*/ pos);
}
function emitDetachedCommentsAndUpdateCommentsInfo(range: TextRange) {
const currentDetachedCommentInfo = currentSourceFile && emitDetachedComments(currentSourceFile.text, getCurrentLineMap(), writer, emitComment, range, newLine, commentsDisabled);
if (currentDetachedCommentInfo) {
if (detachedCommentsInfo) {
detachedCommentsInfo.push(currentDetachedCommentInfo);
}
else {
detachedCommentsInfo = [currentDetachedCommentInfo];
}
}
}
function emitComment(text: string, lineMap: number[], writer: EmitTextWriter, commentPos: number, commentEnd: number, newLine: string) {
if (!currentSourceFile || !shouldWriteComment(currentSourceFile.text, commentPos)) return;
emitPos(commentPos);
writeCommentRange(text, lineMap, writer, commentPos, commentEnd, newLine);
emitPos(commentEnd);
}
/**
* Determine if the given comment is a triple-slash
*
* @return true if the comment is a triple-slash comment else false
*/
function isTripleSlashComment(commentPos: number, commentEnd: number) {
return !!currentSourceFile && isRecognizedTripleSlashComment(currentSourceFile.text, commentPos, commentEnd);
}
// Source Maps
function getParsedSourceMap(node: UnparsedSource) {
if (node.parsedSourceMap === undefined && node.sourceMapText !== undefined) {
node.parsedSourceMap = tryParseRawSourceMap(node.sourceMapText) || false;
}
return node.parsedSourceMap || undefined;
}
function pipelineEmitWithSourceMaps(hint: EmitHint, node: Node) {
const pipelinePhase = getNextPipelinePhase(PipelinePhase.SourceMaps, hint, node);
emitSourceMapsBeforeNode(node);
pipelinePhase(hint, node);
emitSourceMapsAfterNode(node);
}
function emitSourceMapsBeforeNode(node: Node) {
const emitFlags = getEmitFlags(node);
const sourceMapRange = getSourceMapRange(node);
// Emit leading sourcemap
if (isUnparsedNode(node)) {
Debug.assertIsDefined(node.parent, "UnparsedNodes must have parent pointers");
const parsed = getParsedSourceMap(node.parent);
if (parsed && sourceMapGenerator) {
sourceMapGenerator.appendSourceMap(
writer.getLine(),
writer.getColumn(),
parsed,
node.parent.sourceMapPath!,
node.parent.getLineAndCharacterOfPosition(node.pos),
node.parent.getLineAndCharacterOfPosition(node.end)
);
}
}
else {
const source = sourceMapRange.source || sourceMapSource;
if (node.kind !== SyntaxKind.NotEmittedStatement
&& (emitFlags & EmitFlags.NoLeadingSourceMap) === 0
&& sourceMapRange.pos >= 0) {
emitSourcePos(sourceMapRange.source || sourceMapSource, skipSourceTrivia(source, sourceMapRange.pos));
}
if (emitFlags & EmitFlags.NoNestedSourceMaps) {
sourceMapsDisabled = true;
}
}
}
function emitSourceMapsAfterNode(node: Node) {
const emitFlags = getEmitFlags(node);
const sourceMapRange = getSourceMapRange(node);
// Emit trailing sourcemap
if (!isUnparsedNode(node)) {
if (emitFlags & EmitFlags.NoNestedSourceMaps) {
sourceMapsDisabled = false;
}
if (node.kind !== SyntaxKind.NotEmittedStatement
&& (emitFlags & EmitFlags.NoTrailingSourceMap) === 0
&& sourceMapRange.end >= 0) {
emitSourcePos(sourceMapRange.source || sourceMapSource, sourceMapRange.end);
}
}
}
/**
* Skips trivia such as comments and white-space that can be optionally overridden by the source-map source
*/
function skipSourceTrivia(source: SourceMapSource, pos: number): number {
return source.skipTrivia ? source.skipTrivia(pos) : skipTrivia(source.text, pos);
}
/**
* Emits a mapping.
*
* If the position is synthetic (undefined or a negative value), no mapping will be
* created.
*
* @param pos The position.
*/
function emitPos(pos: number) {
if (sourceMapsDisabled || positionIsSynthesized(pos) || isJsonSourceMapSource(sourceMapSource)) {
return;
}
const { line: sourceLine, character: sourceCharacter } = getLineAndCharacterOfPosition(sourceMapSource, pos);
sourceMapGenerator!.addMapping(
writer.getLine(),
writer.getColumn(),
sourceMapSourceIndex,
sourceLine,
sourceCharacter,
/*nameIndex*/ undefined);
}
function emitSourcePos(source: SourceMapSource, pos: number) {
if (source !== sourceMapSource) {
const savedSourceMapSource = sourceMapSource;
const savedSourceMapSourceIndex = sourceMapSourceIndex;
setSourceMapSource(source);
emitPos(pos);
resetSourceMapSource(savedSourceMapSource, savedSourceMapSourceIndex);
}
else {
emitPos(pos);
}
}
/**
* Emits a token of a node with possible leading and trailing source maps.
*
* @param node The node containing the token.
* @param token The token to emit.
* @param tokenStartPos The start pos of the token.
* @param emitCallback The callback used to emit the token.
*/
function emitTokenWithSourceMap(node: Node | undefined, token: SyntaxKind, writer: (s: string) => void, tokenPos: number, emitCallback: (token: SyntaxKind, writer: (s: string) => void, tokenStartPos: number) => number) {
if (sourceMapsDisabled || node && isInJsonFile(node)) {
return emitCallback(token, writer, tokenPos);
}
const emitNode = node && node.emitNode;
const emitFlags = emitNode && emitNode.flags || EmitFlags.None;
const range = emitNode && emitNode.tokenSourceMapRanges && emitNode.tokenSourceMapRanges[token];
const source = range && range.source || sourceMapSource;
tokenPos = skipSourceTrivia(source, range ? range.pos : tokenPos);
if ((emitFlags & EmitFlags.NoTokenLeadingSourceMaps) === 0 && tokenPos >= 0) {
emitSourcePos(source, tokenPos);
}
tokenPos = emitCallback(token, writer, tokenPos);
if (range) tokenPos = range.end;
if ((emitFlags & EmitFlags.NoTokenTrailingSourceMaps) === 0 && tokenPos >= 0) {
emitSourcePos(source, tokenPos);
}
return tokenPos;
}
function setSourceMapSource(source: SourceMapSource) {
if (sourceMapsDisabled) {
return;
}
sourceMapSource = source;
if (source === mostRecentlyAddedSourceMapSource) {
// Fast path for when the new source map is the most recently added, in which case
// we use its captured index without going through the source map generator.
sourceMapSourceIndex = mostRecentlyAddedSourceMapSourceIndex;
return;
}
if (isJsonSourceMapSource(source)) {
return;
}
sourceMapSourceIndex = sourceMapGenerator!.addSource(source.fileName);
if (printerOptions.inlineSources) {
sourceMapGenerator!.setSourceContent(sourceMapSourceIndex, source.text);
}
mostRecentlyAddedSourceMapSource = source;
mostRecentlyAddedSourceMapSourceIndex = sourceMapSourceIndex;
}
function resetSourceMapSource(source: SourceMapSource, sourceIndex: number) {
sourceMapSource = source;
sourceMapSourceIndex = sourceIndex;
}
function isJsonSourceMapSource(sourceFile: SourceMapSource) {
return fileExtensionIs(sourceFile.fileName, Extension.Json);
}
}
function createBracketsMap() {
const brackets: string[][] = [];
brackets[ListFormat.Braces] = ["{", "}"];
brackets[ListFormat.Parenthesis] = ["(", ")"];
brackets[ListFormat.AngleBrackets] = ["<", ">"];
brackets[ListFormat.SquareBrackets] = ["[", "]"];
return brackets;
}
function getOpeningBracket(format: ListFormat) {
return brackets[format & ListFormat.BracketsMask][0];
}
function getClosingBracket(format: ListFormat) {
return brackets[format & ListFormat.BracketsMask][1];
}
// Flags enum to track count of temp variables and a few dedicated names
const enum TempFlags {
Auto = 0x00000000, // No preferred name
CountMask = 0x0FFFFFFF, // Temp variable counter
_i = 0x10000000, // Use/preference flag for '_i'
}
interface OrdinalParentheizerRuleSelector<T extends Node> {
select(index: number): ((node: T) => T) | undefined;
}
type ParenthesizerRule<T extends Node> = (node: T) => T;
type ParenthesizerRuleOrSelector<T extends Node> = OrdinalParentheizerRuleSelector<T> | ParenthesizerRule<T>;
function emitListItemNoParenthesizer(node: Node, emit: (node: Node, parenthesizerRule?: ((node: Node) => Node) | undefined) => void, _parenthesizerRule: ParenthesizerRuleOrSelector<Node> | undefined, _index: number) {
emit(node);
}
function emitListItemWithParenthesizerRuleSelector(node: Node, emit: (node: Node, parenthesizerRule?: ((node: Node) => Node) | undefined) => void, parenthesizerRuleSelector: OrdinalParentheizerRuleSelector<Node>, index: number) {
emit(node, parenthesizerRuleSelector.select(index));
}
function emitListItemWithParenthesizerRule(node: Node, emit: (node: Node, parenthesizerRule?: ((node: Node) => Node) | undefined) => void, parenthesizerRule: ParenthesizerRule<Node> | undefined, _index: number) {
emit(node, parenthesizerRule);
}
function getEmitListItem<T extends Node, R extends ParenthesizerRuleOrSelector<T> | undefined>(emit: (node: Node, parenthesizerRule?: ((node: Node) => Node) | undefined) => void, parenthesizerRule: R): (node: Node, emit: (node: Node, parenthesizerRule?: ((node: Node) => Node) | undefined) => void, parenthesizerRule: R, index: number) => void {
return emit.length === 1 ? emitListItemNoParenthesizer :
typeof parenthesizerRule === "object" ? emitListItemWithParenthesizerRuleSelector :
emitListItemWithParenthesizerRule;
}
}
