Common handling of the error case for RResult<T> (T != void) and RResult<void>

RResultBase captures a possible runtime error that might have occured. If the RResultBase leaves the scope unchecked, it will throw an exception. RResultBase should only be allocated on the stack, which is helped by deleting the new operator. RResultBase is movable but not copyable to avoid throwing multiple exceptions about the same failure.

Definition at line 96 of file RError.hxx.

Public Member Functions
	RResultBase (const RResultBase &other)=delete

	RResultBase (RResultBase &&other)=default

	~RResultBase () noexcept(false)

RError *	GetError ()

RResultBase &	operator= (const RResultBase &other)=delete

RResultBase &	operator= (RResultBase &&other)=default

void	Throw ()
	Throws an RException with fError.

Static Public Member Functions
static RError	ForwardError (RResultBase &&result, RError::RLocation &&sourceLocation)
	Used by R__FORWARD_ERROR in order to keep track of the stack trace.

Protected Member Functions
	RResultBase ()=default

	RResultBase (RError &&error)

bool	Check ()
	Used by the RResult<T> bool operator.

Protected Attributes
std::unique_ptr< RError >	fError
	This is the nullptr for an RResult representing success.

bool	fIsChecked {false}
	Switches to true once the user of an RResult object checks the object status.

#include <ROOT/RError.hxx>

Inheritance diagram for ROOT::Experimental::RResultBase:

[legend]

Constructor & Destructor Documentation

◆ RResultBase() [1/4]

ROOT::Experimental::RResultBase::RResultBase ( )

protecteddefault

◆ RResultBase() [2/4]

ROOT::Experimental::RResultBase::RResultBase ( RError && error )

inlineexplicitprotected

Definition at line 104 of file RError.hxx.

◆ RResultBase() [3/4]

ROOT::Experimental::RResultBase::RResultBase ( const RResultBase & other )

delete

◆ RResultBase() [4/4]

ROOT::Experimental::RResultBase::RResultBase ( RResultBase && other )

default

◆ ~RResultBase()

ROOT::Experimental::RResultBase::~RResultBase ( )

Definition at line 50 of file RError.cxx.

Member Function Documentation

◆ Check()

bool ROOT::Experimental::RResultBase::Check ( )

inlineprotected

Used by the RResult<T> bool operator.

Definition at line 107 of file RError.hxx.

◆ ForwardError()

static RError ROOT::Experimental::RResultBase::ForwardError	(	RResultBase &&	result,
		RError::RLocation &&	sourceLocation
	)

inlinestatic

Used by R__FORWARD_ERROR in order to keep track of the stack trace.

Definition at line 125 of file RError.hxx.

◆ GetError()

RError * ROOT::Experimental::RResultBase::GetError ( )

inline

Definition at line 120 of file RError.hxx.

◆ operator=() [1/2]

RResultBase & ROOT::Experimental::RResultBase::operator= ( const RResultBase & other )

delete

◆ operator=() [2/2]

RResultBase & ROOT::Experimental::RResultBase::operator= ( RResultBase && other )

default

◆ Throw()

void ROOT::Experimental::RResultBase::Throw ( )

Throws an RException with fError.

Definition at line 67 of file RError.cxx.

Member Data Documentation

◆ fError

std::unique_ptr<RError> ROOT::Experimental::RResultBase::fError

protected

This is the nullptr for an RResult representing success.

Definition at line 99 of file RError.hxx.

◆ fIsChecked

bool ROOT::Experimental::RResultBase::fIsChecked {false}

protected

Switches to true once the user of an RResult object checks the object status.

Definition at line 101 of file RError.hxx.

Libraries for ROOT::Experimental::RResultBase: