thrust::nullopt_t
Defined in thrust/optional.h
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struct nullopt_t
- A tag type to represent an empty optional. - Public Functions - 
inline explicit constexpr nullopt_t(do_not_use, do_not_use) noexcept
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struct do_not_use
 
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inline explicit constexpr nullopt_t(do_not_use, do_not_use) noexcept