c0a06d2e6f
react-native code-gen > C++ TurboModules struct support ( #35265 )
...
Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/35265
This adds a templating layer for C++ TurboModules to automatically generate struct templates from TurboModule specs.
You have to define concrete types for those templates to use them in your C++ TurboModule.
E.g. for the JS flow type:
```
export type ObjectStruct = {|
a: number,
b: string,
c?: ?string,
|};
```
code-gen will now generate the following template code:
```
#pragma mark - NativeCxxModuleExampleCxxBaseObjectStruct
template <typename P0, typename P1, typename P2>
struct NativeCxxModuleExampleCxxBaseObjectStruct {
P0 a;
P1 b;
P2 c;
bool operator==(const NativeCxxModuleExampleCxxBaseObjectStruct &other) const {
return a == other.a && b == other.b && c == other.c;
}
};
template <typename P0, typename P1, typename P2>
struct NativeCxxModuleExampleCxxBaseObjectStructBridging {
static NativeCxxModuleExampleCxxBaseObjectStruct<P0, P1, P2> fromJs(
jsi::Runtime &rt,
const jsi::Object &value,
const std::shared_ptr<CallInvoker> &jsInvoker) {
NativeCxxModuleExampleCxxBaseObjectStruct<P0, P1, P2> result{
bridging::fromJs<P0>(rt, value.getProperty(rt, "a"), jsInvoker),
bridging::fromJs<P1>(rt, value.getProperty(rt, "b"), jsInvoker),
bridging::fromJs<P2>(rt, value.getProperty(rt, "c"), jsInvoker)};
return result;
}
static jsi::Object toJs(
jsi::Runtime &rt,
const NativeCxxModuleExampleCxxBaseObjectStruct<P0, P1, P2> &value) {
auto result = facebook::jsi::Object(rt);
result.setProperty(rt, "a", bridging::toJs(rt, value.a));
result.setProperty(rt, "b", bridging::toJs(rt, value.b));
if (value.c) {
result.setProperty(rt, "c", bridging::toJs(rt, value.c.value()));
}
return result;
}
};
```
and you can use it in our C++ TurboModule for example as:
```
using ObjectStruct = NativeCxxModuleExampleCxxBaseObjectStruct<
int32_t,
std::string,
std::optional<std::string>>;
template <>
struct Bridging<ObjectStruct>
: NativeCxxModuleExampleCxxBaseObjectStructBridging<
int32_t,
std::string,
std::optional<std::string>> {};
```
or as
```
using ObjectStruct = NativeCxxModuleExampleCxxBaseObjectStruct<
float,
folly::StringPiece,
std::optional<std::string>>;
template <>
struct Bridging<ObjectStruct>
: NativeCxxModuleExampleCxxBaseObjectStructBridging<
float,
folly::StringPiece,
std::optional<std::string>> {};
```
Or as
...
Changelog: [Internal]
Reviewed By: rshest
Differential Revision: D41133761
fbshipit-source-id: fdf36e51073cb46c5234f6121842c79a884899c7
2022-11-09 13:23:05 -08:00
Christoph Purrer
Ruslan Shestopalyuk