Method UpdateSyntax

external/zep/src/syntax.cpp:118–267

TODO: Multiline comments

    // TODO: Multiline comments
    void ZepSyntax::UpdateSyntax() {
        auto& buffer = m_buffer.GetWorkingBuffer();
        auto itrCurrent = buffer.begin() + m_processedChar;
        auto itrEnd = buffer.begin() + m_targetChar;

        assert(std::distance(itrCurrent, itrEnd) < int(m_syntax.size()));
        assert(m_syntax.size() == buffer.size());

        std::string delim;
        std::string lineEnd("\n");

        if (m_flags & ZepSyntaxFlags::LispLike) {
            delim = std::string(" \t.\n(){}[]");
        } else {
            delim = std::string(" \t.\n;(){}[]=:,!");
        }

        // Walk backwards to previous delimiter
        while (itrCurrent > buffer.begin()) {
            if (std::find(delim.begin(), delim.end(), *itrCurrent) == delim.end()) {
                itrCurrent--;
            } else {
                break;
            }
        }

        // Back to the previous line
        while (itrCurrent > buffer.begin() && *itrCurrent != '\n') {
            itrCurrent--;
        }
        itrEnd = buffer.find_first_of(itrEnd, buffer.end(), lineEnd.begin(), lineEnd.end());

        // Mark a region of the syntax buffer with the correct marker
        auto mark = [&](GapBuffer<uint8_t>::const_iterator itrA, GapBuffer<uint8_t>::const_iterator itrB, ThemeColor type, ThemeColor background) {
            std::fill(m_syntax.begin() + (itrA - buffer.begin()), m_syntax.begin() + (itrB - buffer.begin()), SyntaxData{type, background});
        };

        auto markSingle = [&](GapBuffer<uint8_t>::const_iterator itrA, ThemeColor type, ThemeColor background) {
            (m_syntax.begin() + (itrA - buffer.begin()))->foreground = type;
            (m_syntax.begin() + (itrA - buffer.begin()))->background = background;
        };

        // Update start location
        m_processedChar = long(itrCurrent - buffer.begin());

        // Walk the buffer updating information about syntax coloring
        while (itrCurrent != itrEnd) {
            if (m_stop == true) {
                return;
            }

            // Find a token, skipping delim <itrFirst, itrLast>
            auto itrFirst = buffer.find_first_not_of(itrCurrent, buffer.end(), delim.begin(), delim.end());
            if (itrFirst == buffer.end())
                break;

            auto itrLast = buffer.find_first_of(itrFirst, buffer.end(), delim.begin(), delim.end());