// Acorn: Loose parser // // This module provides an alternative parser (`parse_dammit`) that // exposes that same interface as `parse`, but will try to parse // anything as JavaScript, repairing syntax error the best it can. // There are circumstances in which it will raise an error and give // up, but they are very rare. The resulting AST will be a mostly // valid JavaScript AST (as per the [Mozilla parser API], except // that: // // - Return outside functions is allowed // // - Label consistency (no conflicts, break only to existing labels) // is not enforced. // // - Bogus Identifier nodes with a name of `“✖”` are inserted whenever // the parser got too confused to return anything meaningful. // // [api]: developer.mozilla.org/en-US/docs/SpiderMonkey/Parser_API // // The expected use for this is to first try `acorn.parse`, and only // if that fails switch to `parse_dammit`. The loose parser might // parse badly indented code incorrectly, so **don't** use it as // your default parser. // // Quite a lot of acorn.js is duplicated here. The alternative was to // add a lot of extra cruft to that file, making it less readable // and slower. Copying and editing the code allowed me to make // invasive changes and simplifications without creating a complicated // tangle.

import {addLooseExports, defaultOptions} from “../index” import {LooseParser, pluginsLoose} from “./state” import “./tokenize” import “./statement” import “./expression”

export {LooseParser, pluginsLoose} from “./state”

defaultOptions.tabSize = 4

export function parse_dammit(input, options) {

let p = new LooseParser(input, options)
p.next()
return p.parseTopLevel()

}

addLooseExports(parse_dammit, LooseParser, pluginsLoose)