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Fix off-by-one error in cxx codegen (#36574)

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Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/36574

We would previously generate the following codegen for optional args

```
return static_cast<NativeAudioModuleCxxSpecJSI *>(&turboModule)->playAudio(
    rt,
    args[0].asString(rt),
    args[1].isNull() || args[1].isUndefined() ? std::nullopt : std::make_optional(args[1].asString(rt)),
    args[2].isNull() || args[2].isUndefined() ? std::nullopt : std::make_optional(args[2].asString(rt)),
    args[3].asNumber(),
    count < 4 || args[4].isNull() || args[4].isUndefined() ? std::nullopt : std::make_optional(args[4].asObject(rt)),
    count < 5 || args[5].isNull() || args[5].isUndefined() ? std::nullopt : std::make_optional(args[5].asObject(rt)),
    count < 6 || args[6].isNull() || args[6].isUndefined() ? std::nullopt : std::make_optional(args[6].asBool())
);
```

However, the counts checked are off-by-one, causing us to incorrectly process args.

Changelog: [General][Fixed] Issue with TurboModule C++ codegen with optional args

Differential Revision: D44299193

fbshipit-source-id: f00b9f5e09c2f524f9393137346c256d8b6b2979
This commit is contained in:
Pieter De Baets
2023-03-22 16:57:40 -07:00
committed by Facebook GitHub Bot
parent 4a15f90208
commit 0a8164d993
7 changed files with 981 additions and 243 deletions
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packages/rn-tester/js/examples/TurboModule/NativeCxxModuleExampleExample.js
+2
View File
@@ -55,6 +55,7 @@ type Examples =
| 'promise'
| 'rejectPromise'
| 'voidFunc'
| 'optionalArgs'
| 'emitDeviceEvent';
class NativeCxxModuleExampleExample extends React.Component<{||}, State> {
@@ -99,6 +100,7 @@ class NativeCxxModuleExampleExample extends React.Component<{||}, State> {
.then(() => {})
.catch(e => this._setResult('rejectPromise', e.message)),
voidFunc: () => NativeCxxModuleExample?.voidFunc(),
optionalArgs: () => NativeCxxModuleExample?.getWithWithOptionalArgs(),
emitDeviceEvent: () => {
const CUSTOM_EVENT_TYPE = 'myCustomDeviceEvent';
DeviceEventEmitter.removeAllListeners(CUSTOM_EVENT_TYPE);