/** * Property keyword parser module * * Copyright (C) 2010, 2011, 2012, 2013, 2014 Free Software Foundation, Inc. * * This file is part of GNU ease.js. * * ease.js is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . */ /** * Known (permitted) keywords * @type {Object.} */ var _keywords = { 'public': 1, 'protected': 1<<1, 'private': 1<<2, 'static': 1<<3, 'abstract': 1<<4, 'const': 1<<5, 'virtual': 1<<6, 'override': 1<<7, 'proxy': 1<<8, 'weak': 1<<9, }; /** * Keyword masks for conveniently checking the keyword bitfield * @type {Object.} */ var _kmasks = { amods: _keywords[ 'public' ] | _keywords[ 'protected' ] | _keywords[ 'private' ], }; /** * Parses property keywords * * @param {string} prop property string, which may contain keywords * * @return {{name: string, keywords: Object.}} */ exports.parseKeywords = function ( prop ) { var name = prop, keywords = [], bitwords = 0x00, keyword_obj = {}; prop = ''+( prop ); // the keywords are all words, except for the last, which is the // property name if ( ( keywords = prop.split( /\s+/ ) ).length !== 1 ) { name = keywords.pop(); var i = keywords.length; while ( i-- ) { var keyword = keywords[ i ], kval = _keywords[ keyword ]; // ensure the keyword is recognized if ( !kval ) { throw Error( "Unexpected keyword for '" + name + "': " + keyword ); } // ease-of-access keyword_obj[ keyword ] = true; // permits quick and concise checks bitwords |= kval; } } // members with an underscore prefix are implicitly private, unless an // access modifier is explicitly provided; double-underscore is ingored, // as they denote special members that do not become part of the // prototype and are reserved by ease.js if ( ( name.match( /^_[^_]/ ) && !( bitwords & _kmasks.amods ) ) ) { keyword_obj[ 'private' ] = true; bitwords |= _keywords[ 'private' ]; } return { name: name, keywords: keyword_obj, bitwords: bitwords, }; }