var aparse = require('acorn-node').parse; function parse (src, opts) { if (!opts) opts = {} return aparse(src, opts); } module.exports = function (src, file,opts) { if (typeof src !== 'string') src = String(src); try { eval('throw "STOP"; (function () { ' + src + '\n})()'); return; } catch (err) { if (err === 'STOP') return undefined; if (err.constructor.name !== 'SyntaxError') return err; return errorInfo(src, file, opts); } }; function errorInfo (src, file, opts) { try { parse(src,opts) } catch (err) { return new ParseError(err, src, file); } return undefined; } function ParseError (err, src, file) { SyntaxError.call(this); this.message = err.message.replace(/\s+\(\d+:\d+\)$/, ''); this.line = err.loc.line; this.column = err.loc.column + 1; this.annotated = '\n' + (file || '(anonymous file)') + ':' + this.line + '\n' + src.split('\n')[this.line - 1] + '\n' + Array(this.column).join(' ') + '^' + '\n' + 'ParseError: ' + this.message ; } ParseError.prototype = Object.create(SyntaxError.prototype); ParseError.prototype.toString = function () { return this.annotated; }; ParseError.prototype.inspect = function () { return this.annotated; };