private final boolean lookbehindHasToken ( int n ) { boolean hasToken ; if ( ( m_queueMark - n ) > 0 ) { String lookbehind = ( String ) m_ops . m_tokenQueue . elementAt ( m_queueMark - ( n - 1 ) ) ; char c0 = ( lookbehind == null ) ? ' ' : lookbehind . charAt ( 0 ) ; hasToken = ( c0 == ' ' ) ? false : true ; } else { hasToken = false ; } return hasToken ; }
look behind the current token in order to see if there is a useable token .