154 lines
4.1 KiB
C++
154 lines
4.1 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/Convert.h>
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#include <ReactCommon/CallInvoker.h>
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#include <butter/function.h>
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#include <jsi/jsi.h>
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#include <cstdint>
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#include <memory>
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#include <type_traits>
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namespace facebook::react {
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template <typename T, typename = void>
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struct Bridging;
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template <>
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struct Bridging<void> {
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// Highly generic code may result in "casting" to void.
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static void fromJs(jsi::Runtime &, const jsi::Value &) {}
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};
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namespace bridging {
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namespace detail {
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template <typename F>
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struct function_wrapper;
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template <typename C, typename R, typename... Args>
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struct function_wrapper<R (C::*)(Args...)> {
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using type = butter::function<R(Args...)>;
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};
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template <typename C, typename R, typename... Args>
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struct function_wrapper<R (C::*)(Args...) const> {
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using type = butter::function<R(Args...)>;
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};
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template <typename T, typename = void>
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struct bridging_wrapper {
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using type = remove_cvref_t<T>;
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};
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// Convert lambda types to move-only function types since we can't specialize
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// Bridging templates for arbitrary lambdas.
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template <typename T>
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struct bridging_wrapper<
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T,
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std::void_t<decltype(&remove_cvref_t<T>::operator())>>
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: function_wrapper<decltype(&remove_cvref_t<T>::operator())> {};
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} // namespace detail
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template <typename T>
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using bridging_t = typename detail::bridging_wrapper<T>::type;
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template <typename R, typename T, std::enable_if_t<is_jsi_v<T>, int> = 0>
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auto fromJs(jsi::Runtime &rt, T &&value, const std::shared_ptr<CallInvoker> &)
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-> decltype(static_cast<R>(convert(rt, std::forward<T>(value)))) {
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return convert(rt, std::forward<T>(value));
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}
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template <typename R, typename T>
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auto fromJs(jsi::Runtime &rt, T &&value, const std::shared_ptr<CallInvoker> &)
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-> decltype(Bridging<remove_cvref_t<R>>::fromJs(
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rt,
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convert(rt, std::forward<T>(value)))) {
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return Bridging<remove_cvref_t<R>>::fromJs(
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rt, convert(rt, std::forward<T>(value)));
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}
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template <typename R, typename T>
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auto fromJs(
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jsi::Runtime &rt,
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T &&value,
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const std::shared_ptr<CallInvoker> &jsInvoker)
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-> decltype(Bridging<remove_cvref_t<R>>::fromJs(
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rt,
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convert(rt, std::forward<T>(value)),
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jsInvoker)) {
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return Bridging<remove_cvref_t<R>>::fromJs(
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rt, convert(rt, std::forward<T>(value)), jsInvoker);
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}
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template <typename T, std::enable_if_t<is_jsi_v<T>, int> = 0>
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auto toJs(
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jsi::Runtime &rt,
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T &&value,
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const std::shared_ptr<CallInvoker> & = nullptr) -> remove_cvref_t<T> {
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return convert(rt, std::forward<T>(value));
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}
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template <typename T>
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auto toJs(
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jsi::Runtime &rt,
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T &&value,
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const std::shared_ptr<CallInvoker> & = nullptr)
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-> decltype(Bridging<bridging_t<T>>::toJs(rt, std::forward<T>(value))) {
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return Bridging<bridging_t<T>>::toJs(rt, std::forward<T>(value));
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}
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template <typename T>
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auto toJs(
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jsi::Runtime &rt,
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T &&value,
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const std::shared_ptr<CallInvoker> &jsInvoker)
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-> decltype(Bridging<bridging_t<T>>::toJs(
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rt,
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std::forward<T>(value),
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jsInvoker)) {
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return Bridging<bridging_t<T>>::toJs(rt, std::forward<T>(value), jsInvoker);
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}
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template <typename, typename = jsi::Value, typename = void>
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inline constexpr bool supportsFromJs = false;
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template <typename T, typename Arg = jsi::Value>
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inline constexpr bool supportsFromJs<
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T,
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Arg,
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std::void_t<decltype(fromJs<T>(
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std::declval<jsi::Runtime &>(),
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std::declval<Arg>(),
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nullptr))>> = true;
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template <typename, typename = jsi::Value, typename = void>
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inline constexpr bool supportsToJs = false;
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template <typename T, typename Ret = jsi::Value>
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inline constexpr bool supportsToJs<
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T,
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Ret,
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std::void_t<decltype(toJs(
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std::declval<jsi::Runtime &>(),
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std::declval<T>(),
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nullptr))>> =
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std::is_convertible_v<
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decltype(toJs(
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std::declval<jsi::Runtime &>(),
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std::declval<T>(),
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nullptr)),
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Ret>;
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} // namespace bridging
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} // namespace facebook::react
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