mirror of
https://github.com/facebook/react-native.git
synced 2025-11-01 09:14:26 +00:00
Scott Kyle
31f0796237
Summary: This adds the *option* for C++ TurboModules to use a `*CxxSpec<T>` base class that extends the existing (and unchanged) corresponding `*CxxSpecJSI` base class with code-generated methods that use `bridging::calFromJs` to safely convert types between JSI and C++. If a type conversion cannot be made, then it will fail to compile. Changelog: [General][Added] - Automatic type conversions for C++ TurboModules Reviewed By: christophpurrer Differential Revision: D34780512 fbshipit-source-id: 58b34533c40652db8e3aea43804ceb73bcbe97a5
66 lines
1.6 KiB
C++
66 lines
1.6 KiB
C++
/*
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#pragma once
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#include <react/bridging/Base.h>
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namespace facebook::react::bridging {
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template <
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typename T,
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typename C,
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typename R,
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typename... Args,
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typename... JSArgs>
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T callFromJs(
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jsi::Runtime &rt,
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R (C::*method)(jsi::Runtime &, Args...),
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const std::shared_ptr<CallInvoker> &jsInvoker,
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C *instance,
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JSArgs &&...args) {
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static_assert(
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sizeof...(Args) == sizeof...(JSArgs), "Incorrect arguments length");
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if constexpr (std::is_void_v<T>) {
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(instance->*method)(
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rt, fromJs<Args>(rt, std::forward<JSArgs>(args), jsInvoker)...);
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} else if constexpr (std::is_void_v<R>) {
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static_assert(
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std::is_same_v<T, jsi::Value>,
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"Void functions may only return undefined");
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(instance->*method)(
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rt, fromJs<Args>(rt, std::forward<JSArgs>(args), jsInvoker)...);
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return jsi::Value();
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} else if constexpr (is_jsi_v<T>) {
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return toJs(
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rt,
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(instance->*method)(
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rt, fromJs<Args>(rt, std::forward<JSArgs>(args), jsInvoker)...),
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jsInvoker);
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} else {
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return (instance->*method)(
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rt, fromJs<Args>(rt, std::forward<JSArgs>(args), jsInvoker)...);
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}
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}
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template <typename R, typename... Args>
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constexpr size_t getParameterCount(R (*)(Args...)) {
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return sizeof...(Args);
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}
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template <typename C, typename R, typename... Args>
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constexpr size_t getParameterCount(R (C::*)(Args...)) {
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return sizeof...(Args);
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}
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} // namespace facebook::react::bridging
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