Question 1

How to set up flutter_rust_bridge in an existing Flutter project?

Accepted Answer

Run the one-liner command `cargo install flutter_rust_bridge_codegen && flutter_rust_bridge_codegen create my_app` from the README, then integrate the generated code. For existing projects, you'll need to manually configure the Rust crate and update build scripts, as detailed in the documentation.

Question 2

Flutter Rust Bridge vs direct FFI: which should I use?

Accepted Answer

Flutter Rust Bridge automates boilerplate for complex type serialization, async support, and two-way calls, saving development time. Direct FFI is better for low-level control or simple interfaces, but requires manual memory management and more code.

Question 3

Can I use async Rust functions with Flutter's async Dart?

Accepted Answer

Yes, the bridge supports async Rust functions that can be called from async Dart, allowing non-blocking operations. The README highlights this in the 'Async & sync' features with examples like async search functions.

Question 4

What types of errors does flutter_rust_bridge handle?

Accepted Answer

It automatically translates Rust Result types to Dart exceptions, providing error propagation. Custom errors can be defined, and the bridge ensures memory safety during error handling as part of its reliability guarantees.

Question 5

Is flutter_rust_bridge ready for production apps?

Accepted Answer

Yes, it's used by many projects, has solid CI with sanitizers, and is a Flutter Favorite. However, experimental features may require caution, and testing on all target platforms is recommended due to the cross-platform nature.

Question 6

How do I debug Rust code when called from Flutter?

Accepted Answer

Use standard Rust debugging tools like println! or a debugger, as the bridge integrates with existing Flutter and Rust toolchains. The README mentions that Flutter debuggers and Rust libraries work without interference.

flutter_rust_bridge

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