Function substr

example/cacheHierarchy/fkYAML/node.hpp:2452–2458

@brief Constructs a sub basic_str_view object from `pos` by `n` size. @warning Throws an fkyaml::out_of_range exception if the given `pos` is bigger than the length. @param pos The offset of the beginning position. @param n The number of elements to the end of a new sub basic_str_view object. @return A newly created sub basic_str_view object.

    /// @param n The number of elements to the end of a new sub basic_str_view object.
    /// @return A newly created sub basic_str_view object.
    basic_str_view substr(size_type pos = 0, size_type n = npos) const {
        if FK_YAML_UNLIKELY (pos > m_len) {
            throw fkyaml::out_of_range(static_cast<int>(pos));
        }
        const size_type rlen = std::min(n, m_len - pos);
        return basic_str_view(mp_str + pos, rlen);
    }

    /// @brief Compares the referenced character sequence values with the given basic_str_view object.
    /// @param sv The basic_str_view object to compare with.