Add BigInt Support to C++ Turbo Module Example#56017
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Add BigInt Support to C++ Turbo Module Example#56017christophpurrer wants to merge 3 commits intofacebook:mainfrom
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Summary: Pull Request resolved: facebook#56008 This diff adds native BigInt bridging support to React Native's C++ bridging layer. BigInt is a JavaScript primitive that represents integers with arbitrary precision, enabling safe handling of 64-bit integers that exceed JavaScript's Number.MAX_SAFE_INTEGER (2^53-1). This implementation introduces a `facebook::react::BigInt` C++ wrapper class that internally stores values as `std::variant<int64_t, uint64_t>`, preserving signedness. The wrapper is constructed from `jsi::BigInt` (checking `isInt64()`/`isUint64()` for lossless conversion) and provides `toJSBigInt()` for the reverse direction. A `Bridging<BigInt>` template specialization converts between `jsi::Value` and `facebook::react::BigInt`, enabling seamless use in Turbo Module method signatures. Example usage: ```cpp // In your Turbo Module BigInt getBigInt(jsi::Runtime &rt, BigInt arg) { return arg; // Receives BigInt from JS, returns BigInt to JS } ``` ```javascript // In JavaScript const result = nativeModule.getBigInt(BigInt('9223372036854775807')); ``` ## Hey, wait a moment .... Why are we not simply bridging like this: ``` struct Bridging<int64_t> { ``` or ``` struct Bridging<uint64_t> { ``` ?????? Reason: It is very likely that custom implementations are already present in many RN apps > See: https://reactnative.dev/docs/the-new-architecture/custom-cxx-types ``` template <> struct Bridging<int64_t> { // Converts from the JS representation to the C++ representation static int64_t fromJs(jsi::Runtime &rt, const jsi::String &value) { try { size_t pos; auto str = value.utf8(rt); auto num = std::stoll(str, &pos); if (pos != str.size()) { throw std::invalid_argument("Invalid number"); // don't support alphanumeric strings } return num; } catch (const std::logic_error &e) { throw jsi::JSError(rt, e.what()); } } // Converts from the C++ representation to the JS representation static jsi::String toJs(jsi::Runtime &rt, int64_t value) { return bridging::toJs(rt, std::to_string(value)); } }; ``` Changelog: [General][Added] - Add BigInt bridging support for Turbo Modules Differential Revision: D95706781
Summary:
This diff extends the React Native codegen to support BigIntTypeAnnotation.
This type enables Turbo Modules to handle 64-bit integers safely by using
JavaScript BigInt on the JS side and `facebook::react::BigInt` on native C++
platforms (with Java `long` for Android JNI).
Changes:
- Added BigIntTypeAnnotation to CodegenSchema.js
- Added emitBigInt parser function in parsers-primitives.js
- Added TSBigIntKeyword mapping in TypeScript parser
- Updated GenerateModuleH.js for C++ header generation with `BigInt` param/return
type and `jsi::BigInt` callFromJs return type
- Updated GenerateModuleJavaSpec.js — BigInt maps to 'long' for JNI params
but throws "not supported" for Java spec generation (not yet supported)
- Updated GenerateModuleJniCpp.js with BigIntKind return type
- Updated Objective-C generators: serializeMethod.js, StructCollector.js,
serializeConstantsStruct.js, serializeRegularStruct.js
- Updated compatibility check: ErrorFormatting.js, SortTypeAnnotations.js,
TypeDiffing.js
Example Turbo Module definition:
```javascript
export interface Spec extends TurboModule {
+getBigInt: (arg: bigint) => bigint;
}
```
Changelog: [General][Added] - Add BigInt Type Support for Turbo Module Code Generation
Differential Revision: D95232267
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Summary:
This diff adds BigInt method support to the C++ sample Turbo Module (NativeCxxModuleExample),
demonstrating how to use `facebook::react::BigInt` with the bridging layer.
Changes:
- Added getBigInt method to NativeCxxModuleExample.cpp/.h using
`facebook::react::BigInt` as the C++ type
- Added getBigInt to NativeCxxModuleExample.js spec
- Added BigIntKind to TurboModule.h for the method dispatch infrastructure
- Updated RCTTurboModule.mm to handle BigIntKind in the iOS TurboModule bridge
- Fixed BigInt rendering in NativeCxxModuleExampleExample.js — JSON.stringify()
cannot serialize BigInt, so bigint values are now rendered via .toString()
The `facebook::react::BigInt` wrapper class (introduced in the bridging diff)
stores values as `std::variant<int64_t, uint64_t>`, preserving signedness.
The `Bridging<BigInt>` specialization handles conversion to/from `jsi::BigInt`.
Example:
```cpp
BigInt NativeCxxModuleExample::getBigInt(jsi::Runtime& rt, BigInt arg) {
return arg;
}
```
Changelog: [General][Added] - Add BigInt bridging support for Turbo Modules
Differential Revision: D95232265
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Summary: Pull Request resolved: facebook#56017 This diff adds BigInt method support to the C++ sample Turbo Module (NativeCxxModuleExample), demonstrating how to use `facebook::react::BigInt` with the bridging layer. Changes: - Added getBigInt method to NativeCxxModuleExample.cpp/.h using `facebook::react::BigInt` as the C++ type - Added getBigInt to NativeCxxModuleExample.js spec - Added BigIntKind to TurboModule.h for the method dispatch infrastructure - Updated RCTTurboModule.mm to handle BigIntKind in the iOS TurboModule bridge - Fixed BigInt rendering in NativeCxxModuleExampleExample.js — JSON.stringify() cannot serialize BigInt, so bigint values are now rendered via .toString() The `facebook::react::BigInt` wrapper class (introduced in the bridging diff) stores values as `std::variant<int64_t, uint64_t>`, preserving signedness. The `Bridging<BigInt>` specialization handles conversion to/from `jsi::BigInt`. Example: ```cpp BigInt NativeCxxModuleExample::getBigInt(jsi::Runtime& rt, BigInt arg) { return arg; } ``` Changelog: [General][Added] - Add BigInt bridging support for Turbo Modules Differential Revision: D95232265
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Summary:
This diff adds BigInt method support to the C++ sample Turbo Module (NativeCxxModuleExample),
demonstrating how to use
facebook::react::BigIntwith the bridging layer.Changes:
facebook::react::BigIntas the C++ typecannot serialize BigInt, so bigint values are now rendered via .toString()
The
facebook::react::BigIntwrapper class (introduced in the bridging diff)stores values as
std::variant<int64_t, uint64_t>, preserving signedness.The
Bridging<BigInt>specialization handles conversion to/fromjsi::BigInt.Example:
Changelog: [General][Added] - Add BigInt bridging support for Turbo Modules
Differential Revision: D95232265