Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/35385
In OpenSource builds folly:: types are not always easy to consume.
With butter:: we actually allow consumers to opt-into other/non folly:: types (by providing a custom butter:: implementation).
This change adds a butter::function for that purpose.
It is especially useful for react-native-windows which prefers Mso::Functor over folly::Function.
You can use it by setting those compiler flags:
-DBUTTER_FUNCTION_OVERRIDE_INCLUDE=<functional/functor.h>
-DBUTTER_FUNCTION_OVERRIDE=Mso::Functor
std::function is no option as it is not move-only and we can't wait till 2025 > https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p0288r9.html
Changelog: [Internal]
Reviewed By: sammy-SC
Differential Revision: D41388193
fbshipit-source-id: 56f58b9ddc602aa4b13000031d50de5228b4a16b
Summary:
`toJs()` resolution trips up on converting the plain old jsi values.
In order to help it - remove the automatic inference of template types, since we already know that `T` in this case is going to be the concrete jsi type.
This allows using implicit conversions on Sync/Async Callback types, as well as AsyncPromise.
Without it - AsyncPromise/Callback trip up on trying to convert Convertor<T> to jsi type.
Changelog:
[General][Added] SyncCallback/AsyncCallback/AsyncPromise bridging types in C++ now allow wrapping JSI types.
Reviewed By: JoshuaGross
Differential Revision: D38529799
fbshipit-source-id: 860de2d771899f331bf1a4ff0dade4eccc875618
Summary:
These `constexpr` template variables make it really easy to test for bridging conversion to/from the specified types. The unit tests for this actually uncovered a bug with incompatible casts from lvalue references that was fixed in this diff as well.
Changelog:
Internal
Reviewed By: christophpurrer
Differential Revision: D35105398
fbshipit-source-id: 6e5f16e44ba99b296284970bf32c1f2f47201391
Summary:
This adds `bridging::toJs` and `bridging::fromJs` functions that will safely cast to and from JSI values and C++ types. This is extensible by specializing `Bridging<T>` with `toJs` and/or `fromJs` static methods. There are specializations for most common C++ and JSI types along with tests for those.
C++ functions and lambdas will effortlessly bridge into JS, and bridging JS functions back into C++ require you to choose `SyncCallback<R(Args...)>` or `AsyncCallback<Args...>` types. The sync version allows for having a return value and is strictly not movable to prevent accidentally moving onto another thread. The async version will move its args onto the JS thread and safely call the callback there, but hence always has a `void` return value.
For promises, you can construct a `AsyncPromise<T>` that has `resolve` and `reject` methods that can be called from any thread, and will bridge into JS as a regular `Promise`.
Changelog:
[General][Added] - New bridging API for JSI <-> C++
Reviewed By: christophpurrer
Differential Revision: D34607143
fbshipit-source-id: d832ac24cf84b4c1672a7b544d82e324d5fca3ef
Christoph Purrer
Nikita Lutsenko
Scott Kyle