swt::State< std::monostate > Class Reference

Template specialization for void-returning promises. More...

#include <State.h>

Collaboration diagram for swt::State< std::monostate >:

Public Member Functions
	State ()
	Default constructor - initializes empty void state.
	~State ()
	Destructor - cleanup void state.
void	setValue (std::monostate &&value)
	Set completion state for void promise.
void	setException (std::exception_ptr exception)
	Set exception state for void promise.
template<typename F >
void	setContinuation (std::shared_ptr< SLLooper > &looper_, F &&continuation)
	Register continuation callback for void promise completion.
template<typename F >
void	setErrorHandler (std::shared_ptr< SLLooper > &looper_, F &&errorHandler)
	Register error handler for void promise rejection.

Detailed Description

Template specialization for void-returning promises.

This specialization handles promises that don't return values (void functions) by using std::monostate as the internal value type. This allows the promise framework to work uniformly with both value-returning and void functions while maintaining type safety.

Key differences from the general template:

• Continuation signature: void() instead of void(tValue)
• Internal value type: std::monostate instead of tValue
• API consistency: Same interface as general template

// Create state for void promise
auto voidState = std::make_shared<State<std::monostate>>();
 
// Register continuation (no parameters)
voidState->setContinuation(looper, []() {
    std::cout << "Void promise completed!" << std::endl;
});
 
// Set completion (using monostate)
voidState->setValue(std::monostate{});

Note

Specialization maintains API consistency for void promises

std::monostate is a dummy type representing "no value"

See also

State, Promise<void>

Definition at line 218 of file State.h.

Constructor & Destructor Documentation

State()

swt::State< std::monostate >::State ( )

inline

Default constructor - initializes empty void state.

Definition at line 224 of file State.h.

~State()

swt::State< std::monostate >::~State ( )

inline

Destructor - cleanup void state.

Definition at line 229 of file State.h.

Member Function Documentation

setContinuation()

template<typename F >

void swt::State< std::monostate >::setContinuation	(	std::shared_ptr< SLLooper > &	looper_,
		F &&	continuation
	)

Register continuation callback for void promise completion.

Template Parameters

F	Function type for continuation callback

Parameters

looper_	SLLooper instance for callback execution
continuation	Callback function with void() signature

Registers a continuation callback that takes no parameters, appropriate for void-returning promises.

Note

Continuation signature is void() not void(std::monostate)

Implementation in State.tpp

See also

SLLooper

setErrorHandler()

template<typename F >

void swt::State< std::monostate >::setErrorHandler	(	std::shared_ptr< SLLooper > &	looper_,
		F &&	errorHandler
	)

Register error handler for void promise rejection.

Template Parameters

F	Function type for error handler callback

Parameters

looper_	SLLooper instance for error handler execution
errorHandler	Callback function to execute when exception occurs

Identical behavior to general template - registers error handler with std::exception_ptr parameter.

Note

Implementation in State.tpp

See also

SLLooper

setException()

void swt::State< std::monostate >::setException

(

std::exception_ptr

exception

)

Set exception state for void promise.

Parameters

exception

Exception pointer to store

Identical behavior to general template - sets exception state and triggers error handler if available.

Note

Implementation in State.tpp

See also

setException

Definition at line 16 of file State.cpp.

setValue()

void swt::State< std::monostate >::setValue

(

std::monostate &&

value

)

Set completion state for void promise.

Parameters

value

std::monostate value (represents completion)

Marks the void promise as completed and triggers any registered continuation callback. Uses std::monostate to represent completion without an actual value.

Note

Implementation in State.tpp

See also

setValue

Definition at line 7 of file State.cpp.

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

• include/State.h
• src/State.cpp