| from libcpp cimport bool | |
| cdef extern from "<optional>" namespace "std" nogil: | |
| cdef cppclass nullopt_t: | |
| nullopt_t() | |
| cdef nullopt_t nullopt | |
| cdef cppclass optional[T]: | |
| ctypedef T value_type | |
| optional() | |
| optional(nullopt_t) | |
| optional(optional&) except + | |
| optional(T&) except + | |
| bool has_value() | |
| T& value() except + | |
| T& value_or[U](U& default_value) | |
| void swap(optional&) | |
| void reset() | |
| T& emplace(...) | |
| T& operator*() | |
| #T* operator->() # Not Supported | |
| optional& operator=(optional&) | |
| optional& operator=[U](U&) | |
| bool operator bool() | |
| bool operator!() | |
| bool operator==[U](optional&, U&) | |
| bool operator!=[U](optional&, U&) | |
| bool operator<[U](optional&, U&) | |
| bool operator>[U](optional&, U&) | |
| bool operator<=[U](optional&, U&) | |
| bool operator>=[U](optional&, U&) | |
| optional[T] make_optional[T](...) except + | |