beman::optional::optional<T&>

A specialization of optional for references.

Synopsis

Declared in <beman/optional/optional.hpp>

template<class T>
class optional<T&>;

Name	Description
`iterator`	The type of the iterator for the optional.
`value_type`	The type of the value contained in the optional.

Name	Description
`optional` [constructor]	Constructors
`~optional` [destructor]	Destructor.
`operator=`	Assignment operators
`and_then`	Applies a function to the contained value if there is one.
`begin`	Returns an iterator to the beginning of the optional.
`emplace`	Emplaces a new value in the optional, destroying the current one if the optional is engaged.
`end`	Returns an iterator to the end of the optional.
`has_value`	Checks if the optional has a value.
`operator*`	Returns a reference to the contained value.
`operator->`	Returns a pointer to the contained value.
`or_else`	Calls a function if the optional is empty.
`reset`	Resets the optional to an empty state.
`swap`	Swaps the contents of this optional with another.
`transform`	Applies a function to the contained value if there is one.
`value`	Returns the contained value if there is one, otherwise throws
`value_or`	Returns the contained value if there is one, otherwise returns `u`.
`operator bool`	Converts the optional to a boolean value.

|===

Name	Description
`optional`	Optional Objects