Method check_at

common/peg-parser.cpp:54–89

Check if a delimiter starts at the given position

    // Check if a delimiter starts at the given position
    match_result check_at(std::string_view sv, size_t start_pos) const {
        size_t current = 0; // Start at root
        size_t pos = start_pos;

        // LOG_DBG("%s: checking at pos %zu, sv='%s'\n", __func__, start_pos, std::string(sv).c_str());

        while (pos < sv.size()) {
            auto result = common_parse_utf8_codepoint(sv, pos);
            if (result.status != utf8_parse_result::SUCCESS) {
                break;
            }

            auto it = nodes[current].children.find(result.codepoint);
            if (it == nodes[current].children.end()) {
                // Can't continue matching
                return match_result{match_result::NO_MATCH};
            }

            current = it->second;
            pos += result.bytes_consumed;

            // Check if we've matched a complete word
            if (nodes[current].is_word) {
                return match_result{match_result::COMPLETE_MATCH};
            }
        }

        // Reached end of input while still in the trie (not at root)
        if (current != 0) {
            // We're in the middle of a potential match
            return match_result{match_result::PARTIAL_MATCH};
        }

        // Reached end at root (no match)
        return match_result{match_result::NO_MATCH};
    }

    struct prefix_and_next {
        std::vector<uint32_t> prefix;