// Type definitions for @babel/generator 7.6
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// Project: https://github.com/babel/babel/tree/master/packages/babel-generator, https://babeljs.io
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// Definitions by: Troy Gerwien <https://github.com/yortus>
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// Melvin Groenhoff <https://github.com/mgroenhoff>
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// Cameron Yan <https://github.com/khell>
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// Lyanbin <https://github.com/Lyanbin>
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// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
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// TypeScript Version: 2.9
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import * as t from '@babel/types';
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export interface GeneratorOptions {
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/**
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* Optional string to add as a block comment at the start of the output file.
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*/
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auxiliaryCommentBefore?: string | undefined;
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/**
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* Optional string to add as a block comment at the end of the output file.
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*/
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auxiliaryCommentAfter?: string | undefined;
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/**
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* Function that takes a comment (as a string) and returns true if the comment should be included in the output.
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* By default, comments are included if `opts.comments` is `true` or if `opts.minifed` is `false` and the comment
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* contains `@preserve` or `@license`.
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*/
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shouldPrintComment?(comment: string): boolean;
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/**
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* Attempt to use the same line numbers in the output code as in the source code (helps preserve stack traces).
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* Defaults to `false`.
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*/
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retainLines?: boolean | undefined;
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/**
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* Retain parens around function expressions (could be used to change engine parsing behavior)
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* Defaults to `false`.
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*/
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retainFunctionParens?: boolean | undefined;
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/**
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* Should comments be included in output? Defaults to `true`.
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*/
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comments?: boolean | undefined;
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/**
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* Set to true to avoid adding whitespace for formatting. Defaults to the value of `opts.minified`.
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*/
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compact?: boolean | 'auto' | undefined;
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/**
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* Should the output be minified. Defaults to `false`.
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*/
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minified?: boolean | undefined;
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/**
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* Set to true to reduce whitespace (but not as much as opts.compact). Defaults to `false`.
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*/
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concise?: boolean | undefined;
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/**
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* Used in warning messages
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*/
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filename?: string | undefined;
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/**
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* Enable generating source maps. Defaults to `false`.
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*/
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sourceMaps?: boolean | undefined;
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/**
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* A root for all relative URLs in the source map.
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*/
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sourceRoot?: string | undefined;
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/**
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* The filename for the source code (i.e. the code in the `code` argument).
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* This will only be used if `code` is a string.
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*/
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sourceFileName?: string | undefined;
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/**
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* Set to true to run jsesc with "json": true to print "\u00A9" vs. "©";
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*/
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jsonCompatibleStrings?: boolean | undefined;
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/**
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* Set to true to enable support for experimental decorators syntax before module exports.
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* Defaults to `false`.
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*/
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decoratorsBeforeExport?: boolean | undefined;
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/**
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* Options for outputting jsesc representation.
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*/
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jsescOption?: {
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/**
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* The default value for the quotes option is 'single'. This means that any occurrences of ' in the input
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* string are escaped as \', so that the output can be used in a string literal wrapped in single quotes.
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*/
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quotes?: 'single' | 'double' | 'backtick' | undefined;
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/**
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* The default value for the numbers option is 'decimal'. This means that any numeric values are represented
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* using decimal integer literals. Other valid options are binary, octal, and hexadecimal, which result in
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* binary integer literals, octal integer literals, and hexadecimal integer literals, respectively.
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*/
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numbers?: 'binary' | 'octal' | 'decimal' | 'hexadecimal' | undefined;
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/**
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* The wrap option takes a boolean value (true or false), and defaults to false (disabled). When enabled, the
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* output is a valid JavaScript string literal wrapped in quotes. The type of quotes can be specified through
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* the quotes setting.
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*/
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wrap?: boolean | undefined;
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/**
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* The es6 option takes a boolean value (true or false), and defaults to false (disabled). When enabled, any
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* astral Unicode symbols in the input are escaped using ECMAScript 6 Unicode code point escape sequences
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* instead of using separate escape sequences for each surrogate half. If backwards compatibility with ES5
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* environments is a concern, don’t enable this setting. If the json setting is enabled, the value for the es6
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* setting is ignored (as if it was false).
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*/
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es6?: boolean | undefined;
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/**
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* The escapeEverything option takes a boolean value (true or false), and defaults to false (disabled). When
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* enabled, all the symbols in the output are escaped — even printable ASCII symbols.
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*/
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escapeEverything?: boolean | undefined;
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/**
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* The minimal option takes a boolean value (true or false), and defaults to false (disabled). When enabled,
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* only a limited set of symbols in the output are escaped: \0, \b, \t, \n, \f, \r, \\, \u2028, \u2029.
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*/
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minimal?: boolean | undefined;
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/**
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* The isScriptContext option takes a boolean value (true or false), and defaults to false (disabled). When
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* enabled, occurrences of </script and </style in the output are escaped as <\/script and <\/style, and <!--
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* is escaped as \x3C!-- (or \u003C!-- when the json option is enabled). This setting is useful when jsesc’s
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* output ends up as part of a <script> or <style> element in an HTML document.
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*/
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isScriptContext?: boolean | undefined;
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/**
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* The compact option takes a boolean value (true or false), and defaults to true (enabled). When enabled,
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* the output for arrays and objects is as compact as possible; it’s not formatted nicely.
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*/
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compact?: boolean | undefined;
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/**
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* The indent option takes a string value, and defaults to '\t'. When the compact setting is enabled (true),
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* the value of the indent option is used to format the output for arrays and objects.
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*/
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indent?: string | undefined;
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/**
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* The indentLevel option takes a numeric value, and defaults to 0. It represents the current indentation level,
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* i.e. the number of times the value of the indent option is repeated.
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*/
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indentLevel?: number | undefined;
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/**
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* The json option takes a boolean value (true or false), and defaults to false (disabled). When enabled, the
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* output is valid JSON. Hexadecimal character escape sequences and the \v or \0 escape sequences are not used.
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* Setting json: true implies quotes: 'double', wrap: true, es6: false, although these values can still be
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* overridden if needed — but in such cases, the output won’t be valid JSON anymore.
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*/
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json?: boolean | undefined;
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/**
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* The lowercaseHex option takes a boolean value (true or false), and defaults to false (disabled). When enabled,
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* any alphabetical hexadecimal digits in escape sequences as well as any hexadecimal integer literals (see the
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* numbers option) in the output are in lowercase.
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*/
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lowercaseHex?: boolean | undefined;
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} | undefined;
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}
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export class CodeGenerator {
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constructor(ast: t.Node, opts?: GeneratorOptions, code?: string);
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generate(): GeneratorResult;
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}
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/**
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* Turns an AST into code, maintaining sourcemaps, user preferences, and valid output.
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* @param ast - the abstract syntax tree from which to generate output code.
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* @param opts - used for specifying options for code generation.
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* @param code - the original source code, used for source maps.
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* @returns - an object containing the output code and source map.
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*/
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export default function generate(
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ast: t.Node,
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opts?: GeneratorOptions,
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code?: string | { [filename: string]: string },
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): GeneratorResult;
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export interface GeneratorResult {
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code: string;
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map: {
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version: number;
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sources: string[];
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names: string[];
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sourceRoot?: string | undefined;
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sourcesContent?: string[] | undefined;
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mappings: string;
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file: string;
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} | null;
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}
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