Result Class Reference

Represents the 'success' or 'failure' of an operation, and holds an associated error message to describe the error when there's a failure. More...

#include <juce_Result.h>

Collaboration diagram for Result:

Public Member Functions
	Result (const Result &)
	Result (Result &&) noexcept
bool	failed () const noexcept
	Returns true if this result indicates a failure. More...
const String &	getErrorMessage () const noexcept
	Returns the error message that was set when this result was created. More...
	operator bool () const noexcept
	Returns true if this result indicates a success. More...
bool	operator! () const noexcept
	Returns true if this result indicates a failure. More...
bool	operator!= (const Result &other) const noexcept
Result &	operator= (const Result &)
Result &	operator= (Result &&) noexcept
bool	operator== (const Result &other) const noexcept
bool	wasOk () const noexcept
	Returns true if this result indicates a success. More...

Static Public Member Functions
static Result	fail (const String &errorMessage) noexcept
	Creates a 'failure' result. More...
static Result	ok () noexcept
	Creates and returns a 'successful' result. More...

Private Member Functions
	Result () noexcept
	Result (const String &) noexcept
	operator int () const
	operator void * () const

Private Attributes
String	errorMessage

Detailed Description

Represents the 'success' or 'failure' of an operation, and holds an associated error message to describe the error when there's a failure.

E.g.

Result myOperation()
{
    if (doSomeKindOfFoobar())
        return Result::ok();
    else
        return Result::fail ("foobar didn't work!");
}

const Result result (myOperation());

if (result.wasOk())
{
    ...it's all good...
}
else
{
    warnUserAboutFailure ("The foobar operation failed! Error message was: "
                            + result.getErrorMessage());
}

Constructor & Destructor Documentation

Result() [1/4]

Result::Result

(

const Result &

)

Result() [2/4]

Result::Result ( Result &&  )

noexcept

Result() [3/4]

Result::Result ( )

privatenoexcept

Result() [4/4]

Result::Result ( const String &  )

explicitprivatenoexcept

Member Function Documentation

fail()

static Result Result::fail ( const String &  errorMessage )

staticnoexcept

Creates a 'failure' result.

If you pass a blank error message in here, a default "Unknown Error" message will be used instead.

Referenced by VideoComponent::Pimpl::DirectShowContext::getErrorMessageFromResult(), anonymous_namespace{juce_posix_SharedCode.h}::getResultForErrno(), VideoComponent::Pimpl::load(), and VideoComponent::Pimpl::DirectShowContext::loadFile().

failed()

bool Result::failed ( ) const

noexcept

Returns true if this result indicates a failure.

You can use getErrorMessage() to retrieve the error message associated with the failure.

getErrorMessage()

const String& Result::getErrorMessage ( ) const

noexcept

Returns the error message that was set when this result was created.

For a successful result, this will be an empty string;

ok()

static Result Result::ok ( )

inlinestaticnoexcept

Creates and returns a 'successful' result.

References operator!=(), and operator==().

Referenced by anonymous_namespace{juce_posix_SharedCode.h}::getResultForReturnValue(), VideoComponent::Pimpl::load(), and VideoComponent::Pimpl::DirectShowContext::loadFile().

operator bool()

Result::operator bool ( ) const

noexcept

Returns true if this result indicates a success.

This is equivalent to calling wasOk().

operator int()

Result::operator int ( ) const

private

operator void *()

Result::operator void * ( ) const

private

operator!()

bool Result::operator! ( ) const

noexcept

Returns true if this result indicates a failure.

This is equivalent to calling failed().

operator!=()

bool Result::operator!= ( const Result &  other ) const

noexcept

operator=() [1/2]

Result& Result::operator=

(

const Result &

)

operator=() [2/2]

Result& Result::operator= ( Result &&  )

noexcept

operator==()

bool Result::operator== ( const Result &  other ) const

noexcept

wasOk()

bool Result::wasOk ( ) const

noexcept

Returns true if this result indicates a success.

Member Data Documentation

errorMessage

String Result::errorMessage

private

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

• juce_Result.h