nl_tokens: Converts CSS string to AST .
pl_tokens: function cssToAST ( text , syntax , <mask> ) { var string = JSON . stringify ; var fileInfo = filename ? ' at ' + filename : '' ; var tree ; try { tree = gonzales . parse ( text , { syntax : syntax } ) ; } catch ( e ) { throw new Error ( 'Parsing error' + fileInfo + ': ' + e . message ) ; } // TODO: When can tree be undefined? <tg> if ( typeof tree === 'undefined' ) { let message = ` ${ fileInfo } ${ string ( text ) } ${ string ( tree ) } ` ; throw new Error ( format ( message ) ) ; } return tree ; }