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easejs/lib/prop_parser.js

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/**
* Property keyword parser module
*
* Copyright (C) 2010 Mike Gerwitz
*
* This file is part of ease.js.
*
* ease.js is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser 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 Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* @author Mike Gerwitz
* @package core
*/
/**
* Known (permitted) keywords
* @type {Object.<string,boolean>}
*/
var _keywords = {
'public': true,
'protected': true,
'private': true,
'static': true,
'abstract': true,
'const': true,
'virtual': true,
};
/**
* Parses property keywords
*
* @param {string} prop property string, which may contain keywords
*
* @return {{name: string, keywords: Object.<string, boolean>}}
*/
exports.parseKeywords = function ( prop )
{
var name = prop,
keywords = [],
keyword_obj = {};
prop = ''+( prop );
// only perform parsing if the string contains a space
if ( / /.test( prop ) )
{
// the keywords are all words, except for the last, which is the
// property name
keywords = prop.split( /\s+/ );
name = keywords.pop();
var i = keywords.length,
keyword = '';
while ( i-- )
{
keyword = keywords[ i ];
// ensure the keyword is recognized
if ( !_keywords[ keyword ] )
{
throw Error(
"Unexpected keyword for '" + name + "': " + keyword
);
}
keyword_obj[ keyword ] = true;
}
}
return {
name: name,
keywords: keyword_obj,
};
}