template<class T>
class utils::OptionalRef< T >
Class that behaves as a nullable reference. Main difference from the pointer - value comparison of pointed values.
Initializes from reference to a T or from optional<T>.
Once the reference is constructed it can not be changed to point to different address.
Definition at line 31 of file optional_ref.hpp.
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| constexpr | OptionalRef (std::nullopt_t) noexcept |
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constexpr | OptionalRef (const OptionalRef &) noexcept=default |
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constexpr OptionalRef & | operator= (const OptionalRef &) noexcept=delete |
| constexpr | OptionalRef (T &other) noexcept |
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constexpr | OptionalRef (const T &&)=delete |
| template<typename U> |
| constexpr | OptionalRef (const std::optional< U > &other) noexcept |
| template<typename U> |
| constexpr | OptionalRef (std::optional< U > &other) noexcept |
| template<typename U> |
| constexpr | OptionalRef (const std::optional< U > &&) noexcept |
| template<typename U> |
| constexpr | OptionalRef (const boost::optional< U > &other) noexcept |
| template<typename U> |
| constexpr | OptionalRef (boost::optional< U > &other) noexcept |
| template<typename U> |
| constexpr | OptionalRef (const boost::optional< U > &&) noexcept |
| constexpr bool | has_value () const noexcept |
| constexpr | operator bool () const noexcept |
| constexpr T * | operator-> () const |
| constexpr T & | operator* () const |
| constexpr T & | value () const |
| template<typename U> |
| constexpr T | value_or (U &&default_value) const |
| template<typename F> |
| constexpr auto | and_then (F &&function) const -> std::remove_cvref_t< std::invoke_result_t< F, T & > > |
| template<typename F> |
| constexpr auto | transform (F &&function) const |
| template<typename F> |
| constexpr OptionalRef | or_else (F &&function) const |
