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- # Currently Cython does not support std::optional.
- # See: https://github.com/cython/cython/pull/3294
- 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()
- 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 +
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