Method substr

include/boost/compute/container/basic_string.hpp:259–263

    }

    basic_string<CharT, Traits> substr(size_type pos = 0,
                                       size_type count = npos) const
    {
        return basic_string<CharT, Traits>(*this, pos, count);
    }

    /// Finds the first character \p ch
    size_type find(CharT ch, size_type pos = 0) const