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Add support for creating promises from Qt signals (#25)

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Introduce a new `QtPromise::connect()` helper that allows to create a promise resolved from a single signal and optionally, rejected by another one (from a different object or not). The promise type is determined by the type of the first signal argument (other arguments are currently ignored). A `QPromise<void>` is returned if the resolve signal doesn't provide any argument.

If the rejection is emitted before the promise is resolved, the promise will be rejected with the value of the first argument (other arguments being ignored). If the rejection signal doesn't provide any argument, the promise will be rejected with `QPromiseUndefinedException` if the signal is emitted. Additionally, the promise will be automatically rejected with `QPromiseContextException` if the source object is destroyed before the promise is resolved.
This commit is contained in:
Simon Brunel
2019-03-04 13:58:01 +01:00
parent 47b90fb532
commit 1f30224578
22 changed files with 686 additions and 2 deletions
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include/QtPromise
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@ -2,6 +2,7 @@
#define QTPROMISE_MODULE_H
#include "../src/qtpromise/qpromise.h"
#include "../src/qtpromise/qpromiseconnections.h"
#include "../src/qtpromise/qpromisefuture.h"
#include "../src/qtpromise/qpromisehelpers.h"