| is_just | boost::hana::optional< T > | 相关 |
| is_nothing | boost::hana::optional< T > | 相关 |
| just | boost::hana::optional< T > | 相关 |
| make< optional_tag > | boost::hana::optional< T > | 相关 |
| make_optional | boost::hana::optional< T > | 相关 |
| maybe | boost::hana::optional< T > | 相关 |
| nothing | boost::hana::optional< T > | 相关 |
| operator!=(X &&x, Y &&y) | boost::hana::optional< T > | 友元 |
| operator*() | boost::hana::optional< T > | |
| operator->() | boost::hana::optional< T > | |
| operator<(X &&x, Y &&y) | boost::hana::optional< T > | 友元 |
| operator<=(X &&x, Y &&y) | boost::hana::optional< T > | 友元 |
| operator=(optional const &)=default | boost::hana::optional< T > | |
| operator=(optional &&)=default | boost::hana::optional< T > | |
| operator==(X &&x, Y &&y) | boost::hana::optional< T > | 友元 |
| operator>(X &&x, Y &&y) | boost::hana::optional< T > | 友元 |
| operator>=(X &&x, Y &&y) | boost::hana::optional< T > | 友元 |
| operator|(optional< T... >, F) | boost::hana::optional< T > | 友元 |
| optional()=default | boost::hana::optional< T > | |
| optional(optional const &)=default | boost::hana::optional< T > | |
| optional(optional &&)=default | boost::hana::optional< T > | |
| optional(T const &t) | boost::hana::optional< T > | |
| optional(T &&t) | boost::hana::optional< T > | |
| sfinae | boost::hana::optional< T > | 相关 |
| value() | boost::hana::optional< T > | |
| value_or(U &&default_)
| boost::hana::optional< T > | |
