fl::task::PromiseResult< T > Class Template Reference

Detailed Description

template<typename T>
class fl::task::PromiseResult< T >

Result type for promise operations.

Template Parameters

T	The success value type

PromiseResult provides a clean API for handling success/error results from async operations. It wraps a variant<T, Error> but provides more ergonomic access patterns with ok() checking and automatic assertions.

Examples

auto result = fl::task::await_top_level<int>(some_promise);
 
if (result.ok()) {
    int value = result.value();  // Safe access
    FL_WARN("Success: " << value);
} else {
    FL_WARN("Error: " << result.error().message);
}
 
// Or use operator bool
if (result) {
    FL_WARN("Got: " << result.value());
}

Definition at line 41 of file promise_result.h.

#include <promise_result.h>

Public Member Functions
	PromiseResult (const Error &error) FL_NO_EXCEPT
	Construct an error PromiseResult.
	PromiseResult (const T &value) FL_NO_EXCEPT
	Construct a successful PromiseResult.
	PromiseResult (Error &&error) FL_NO_EXCEPT
	Construct an error PromiseResult (move)
	PromiseResult (T &&value) FL_NO_EXCEPT
	Construct a successful PromiseResult (move)
const Error &	error () const FL_NO_EXCEPT
	Get the error value.
fl::string	error_message () const FL_NO_EXCEPT
	Get the error message as a convenience.
bool	ok () const FL_NO_EXCEPT
	Check if the result is successful.
	operator bool () const FL_NO_EXCEPT
	Boolean conversion operator (same as ok())
const T &	value () const FL_NO_EXCEPT
	Get the success value (const)
T &	value () FL_NO_EXCEPT
	Get the success value (mutable)
const fl::variant< T, Error > &	variant () const FL_NO_EXCEPT
	Access the underlying variant (for advanced usage)

Private Attributes
fl::variant< T, Error >	mResult

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

• /home/runner/work/dox/dox/fastled/src/fl/task/promise_result.h