adbc::driver::Result< T > Class Template Reference

A wrapper around a value, or an error. More...

#include <status.h>

Public Member Functions
	Result (Status s)
	Implicit constructor to allow returning a status in functions.
template<typename U, typename E = typename std::enable_if< std::is_constructible<T, U>::value && std::is_convertible<U, T>::value && !std::is_same<typename std::remove_reference< typename std::remove_cv<U>::type>::type, Status>::value>::type>
	Result (U &&t)
	Implicit constructor to allow returning a value in functions.
bool	has_value () const
	Check if this has a value or not.
const Status &	status () const &
	Get the status (if present).
Status &&	status () &&
	Move the status (if present).
T &	value ()
	Get the value (if present).

Private Attributes
std::variant< Status, T >	value_

Detailed Description

template<typename T>
class adbc::driver::Result< T >

A wrapper around a value, or an error.

We could probably do better by using a library like std::expected, but this will suffice for now. There doesn't seem to be a reasonably maintained std::expected backport.

Constructor & Destructor Documentation

Result() [1/2]

template<typename T>

adbc::driver::Result< T >::Result ( Status s )

inline

Implicit constructor to allow returning a status in functions.

Result() [2/2]

template<typename T>

template<typename U, typename E = typename std::enable_if< std::is_constructible<T, U>::value && std::is_convertible<U, T>::value && !std::is_same<typename std::remove_reference< typename std::remove_cv<U>::type>::type, Status>::value>::type>

adbc::driver::Result< T >::Result ( U && t )

inline

Implicit constructor to allow returning a value in functions.

Member Function Documentation

has_value()

template<typename T>

bool adbc::driver::Result< T >::has_value ( ) const

inline

Check if this has a value or not.

status() [1/2]

template<typename T>

Status && adbc::driver::Result< T >::status ( ) &&

inline

Move the status (if present).

status() [2/2]

template<typename T>

const Status & adbc::driver::Result< T >::status ( ) const &

inline

Get the status (if present).

value()

template<typename T>

T & adbc::driver::Result< T >::value ( )

inline

Get the value (if present).

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

• /adbc/c/driver/framework/status.h