nl_tokens: / * Gets a single valid identifier char from the input stream or null if there is none .
pl_tokens: function ( first ) { var input = this . source ; if ( this . cursor >= <mask> . length ) return null ; var ch = input [ this . cursor ] ; // first check for \u escapes if ( ch === '\\' && input [ this . cursor + 1 ] === 'u' ) { // get the character value try { ch = String . fromCharCode ( parseInt ( input . substring ( this . cursor + 2 , this . cursor + 6 ) , 16 ) ) ; } catch ( ex ) { return null ; } this . cursor += 5 ; } var valid = isValidIdentifierChar ( ch , first ) ; if ( valid ) this . cursor ++ ; return ( valid ? ch : null ) ; }