foresthub::Optional< T > Struct Template Reference

Minimal Optional<T> polyfill for C++14 compatibility. More...

#include <optional.hpp>

Public Member Functions
	Optional ()=default
	Default-construct without a stored value.
	Optional (const T &val)
	Construct with a copy of the given value.
	Optional (T &&val)
	Construct by moving the given value.
bool	HasValue () const
	Returns true if a value is stored.
	operator bool () const
	Contextual conversion to bool (true if a value is stored).
const T &	operator* () const
	Returns a reference to the stored value (undefined if empty).
T &	operator* ()
	Returns a mutable reference to the stored value (undefined if empty).
const T *	operator-> () const
	Returns a pointer to the stored value (undefined if empty).
T *	operator-> ()
	Returns a mutable pointer to the stored value (undefined if empty).
Optional &	operator= (const T &val)
	Assign a value (sets has_value to true).
Optional &	operator= (T &&val)
	Move-assign a value (sets has_value to true).

Public Attributes
bool	has_value = false
	Whether a value is stored.
T	value {}
	Stored value (default-constructed when empty).

Detailed Description

template<typename T>
struct foresthub::Optional< T >

Minimal Optional<T> polyfill for C++14 compatibility.

Used for non-string optional fields (int, float, structs) where a default/zero value would be ambiguous. String-type optional fields should use plain std::string (empty = not set).

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The documentation for this struct was generated from the following file:

• include/foresthub/util/optional.hpp