| 99 | const Container* get() const { return m_container; } |
| 100 | |
| 101 | decltype(auto) begin() const { |
| 102 | if (!m_container) |
| 103 | return sentinel_container().cbegin(); |
| 104 | |
| 105 | return m_container->cbegin(); |
| 106 | } |
| 107 | |
| 108 | decltype(auto) end() const { |
| 109 | if (!m_container) |