mirror of
https://github.com/facebook/react-native.git
synced 2025-11-01 09:14:26 +00:00
Scott Kyle
087624ccaf
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
72 lines
1.9 KiB
C++
72 lines
1.9 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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static_assert(
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(supportsFromJs<Args, JSArgs> && ...), "Incompatible arguments");
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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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static_assert(supportsToJs<R, T>, "Incompatible return type");
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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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static_assert(std::is_convertible_v<R, T>, "Incompatible return type");
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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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