Function regex_from_pattern

libs/core/util/src/regex_from_pattern.cpp:65–127

    }    // namespace detail

    std::string regex_from_pattern(std::string const& pattern, error_code& ec)
    {
        std::string result;
        auto const end = pattern.end();
        for (auto it = pattern.begin(); it != end; ++it)
        {
            switch (char const c = *it)
            {
            case '*':
                result.append(".*");
                break;

            case '?':
                result.append(1, '.');
                break;

            case '[':
            {
                std::string r = detail::regex_from_character_set(it, end, ec);
                if (ec)
                    return "";
                result.append(r);
            }
            break;

            case '\\':
                if (++it == end)
                {
                    HPX_THROWS_IF(ec, hpx::error::bad_parameter,
                        "regex_from_pattern", "Invalid escape sequence at: {}",
                        pattern);
                    return "";
                }
                result.append(1, *it);
                break;

            // escape regex special characters
            // NOLINTNEXTLINE(bugprone-branch-clone)
            case '+':
                [[fallthrough]];
            case '.':
                [[fallthrough]];
            case '(':
                [[fallthrough]];
            case ')':
                [[fallthrough]];
            case '{':
                [[fallthrough]];
            case '}':
                [[fallthrough]];
            case '^':
                [[fallthrough]];
            case '$':
                result.append("\\");
                [[fallthrough]];

            default:
                result.append(1, c);