Trait gio::prelude::AsyncResultExt[−][src]

pub trait AsyncResultExt: 'static {
    fn source_object(&self) -> Option<Object>;

    fn legacy_propagate_error(&self) -> Result<(), Error>;
}
Expand description

Trait containing all AsyncResult methods.

Implementors

AsyncResult, Task

Required methods

Gets the source object from a AsyncResult.

Returns

a new reference to the source object for the self, or None if there is none.

If self is a GSimpleAsyncResult, this is equivalent to g_simple_async_result_propagate_error(). Otherwise it returns false.

This can be used for legacy error handling in async *_finish() wrapper functions that traditionally handled GSimpleAsyncResult error returns themselves rather than calling into the virtual method. This should not be used in new code; AsyncResult errors that are set by virtual methods should also be extracted by virtual methods, to enable subclasses to chain up correctly.

Returns

true if error is has been filled in with an error from self, false if not.

Implementors