Template Struct result_data

• Defined in File activities.h

Inheritance Relationships

Derived Type

• public udho::activities::result< SuccessT, FailureT > (Template Struct result)

Struct Documentation

template<typename SuccessT, typename FailureT>
struct udho::activities::result_data

Contains Copiable Success or Failure data for an activity.

Template Parameters

• SuccessT: success data type

• FailureT: failure data type

Subclassed by udho::activities::result< SuccessT, FailureT >

Public Types

typedef SuccessT success_type

typedef FailureT failure_type

typedef result_data<SuccessT, FailureT> self_type

typedef self_type result_type

Public Functions

result_data()

bool completed() const

either success or failure data set

bool failed() const

whether the activity has failed

bool canceled() const

check whether the activity has been canceled

bool okay() const

const success_type &success_data() const

Success data

const failure_type &failure_data() const

Failure data

template<typename CallableT>
void apply(CallableT callback)

Apply a callable to the result data which will be invoked exactly once with appropriate arguments. The invocation of the callback depends on the state as shown below.

• Incomplete: callback()

• Canceled: callback(const SuccessT&, const FailureT&)

• Failed: callback(const FailureT&)

• Successful: callback(const SuccessT&)

The callback may not have all the overloads.

Parameters

• callback:

Public Members

bool _completed

bool _success

bool _canceled

success_type _sdata

failure_type _fdata

Protected Functions

void success(const success_type &data)

Set Success Data

void failure(const failure_type &data)

Set Failure Data

void cancel()

mark as canceled