src/main/java/com/basistech/tclre/Compiler.java
private void dovec(UnicodeSet set, State lp, State rp) throws RegexException {

        int rangeCount = set.getRangeCount();
        for (int rx = 0; rx < rangeCount; rx++) {
            int rangeStart = set.getRangeStart(rx);
            int rangeEnd = set.getRangeEnd(rx);
            /*
             * Note: ICU operates in UTF-32 here, and the ColorMap is happy to play along.
             */
            if (LOG.isDebugEnabled() && IS_DEBUG) {
                LOG.debug(String.format("%s %d %4x %4x", set, rx, rangeStart, rangeEnd));
            }
            //TODO: this arc is probably redundant.
            if (rangeStart == rangeEnd) {
                nfa.newarc(PLAIN, cm.subcolor(rangeStart), lp, rp);
            }
            cm.subrange(rangeStart, rangeEnd, lp, rp);
        }
    }
private void dovec(UnicodeSet set, State lp, State rp) throws RegexException {

        int rangeCount = set.getRangeCount();
        for (int rx = 0; rx < rangeCount; rx++) {
            int rangeStart = set.getRangeStart(rx);
            int rangeEnd = set.getRangeEnd(rx);
            /*
             * Note: ICU operates in UTF-32 here, and the ColorMap is happy to play along.
             */
            if (LOG.isDebugEnabled() && IS_DEBUG) {
                LOG.debug(String.format("%s %d %4x %4x", set, rx, rangeStart, rangeEnd));
            }
            //TODO: this arc is probably redundant.
            if (rangeStart == rangeEnd) {
                nfa.newarc(PLAIN, cm.subcolor(rangeStart), lp, rp);
            }
            cm.subrange(rangeStart, rangeEnd, lp, rp);
        }
    }
dovec - fill in arcs for each element of a cvec
all kinds of MCCE complexity removed.