src/main/java/com/basistech/tclre/Compiler.java
private int scannum() throws RegexException {
        int n = 0;

        while (see(DIGIT) && n < DUPMAX) {
            n = n * 10 + nextvalue;
            lex.next();
        }

        if (see(DIGIT) || n > DUPMAX) {
            throw new RegexException("Unvalid reference number.");
        }
        return n;
    }
private int scannum() throws RegexException {
        int n = 0;

        while (see(DIGIT) && n < DUPMAX) {
            n = n * 10 + nextvalue;
            lex.next();
        }

        if (see(DIGIT) || n > DUPMAX) {
            throw new RegexException("Unvalid reference number.");
        }
        return n;
    }
private int scannum ( ) throws RegexException { int n = 0 ; while ( see ( DIGIT ) && n < DUPMAX ) { n = n * 10 + nextvalue ; lex . next ( ) ; } if ( see ( DIGIT ) || n > DUPMAX ) { throw new RegexException ( "Unvalid reference number." ) ; } return n ; }
scannum - scan a number

@return value <= DUPMAX
scannum - scan a number