flutter_rust_bridge v2: Flutter/Dart <-> Rust binding generator, feature-rich, but seamless and simple.

What's new in V2

🍀 What's this?

• Just write down normal Rust code (even with arbitrary types, closure, &mut, async, traits, etc)
• And call it from Flutter, as if Rust code is normal Flutter code
• The bridge will generate all glues in between

📚 Quickstart

Create a working Flutter + Rust app and see it live, by running:

cargo install flutter_rust_bridge_codegen && flutter_rust_bridge_codegen create my_app && cd my_app && flutter run

flutter_rust_bridge_codegen generate && flutter run

For more elaborated quickstart, please visit this page.

🚀 Advantages

1. Officially Flutter Favorite

This package is officially Flutter Favorite, and is in the first batch of 7 packages at its rebooting. (another link)

2. Simplicity

3. Powerfulness

4. Reliability

Why Flutter + Rust?

✨ Show me the code

Example 1

Simple Rust...

fn f(a: String, b: Vec<MyEnum>) -> MyStruct { ... }

...called from Dart, without manual intervention.

print(f(a: 'Hello', b: [MyEnum.c('Tom')]));

Example 2

Suppose we implement a word dictionary in Rust:

// ↱ Arbitrarily fancy Rust types
pub struct WordDict { .. }

// ↱ Support functions & methods
impl WordDict {
    //          ↱ Can call Dart back                 ↱ Translate errors
    pub fn open(chooser: impl Fn(String) -> bool) -> Result<WordDict> { .. }

    // ↱ Support async & sync Dart; property getter
    #[frb(sync, getter)]
    //          ↱ Support T/&T/&mut T
    pub fn size(&self) -> u32 { .. }

    //  ↱ Allow async & sync                    ↱ Support stream (iterator)
    pub async fn search(&self, keyword: String, sink: StreamSink<String>) { .. }
}

Still seamlessly call in Dart:

final dict = await WordDict.open((situation) => true);
print(dict.size);
await for (final value in dict.search('something')) { print(value); }

There are still many features not covered here, such as parsing third party packages, lifetimes, traits, auto accessors, proxies, etc.

💡 Documentation

Check out the documentation for quickstart, full guides and more.

📎 P.S. Achieve ~60 FPS, no matter how janky the Flutter app was due to build/layout

Here is my other open-source library :) https://github.com/fzyzcjy/flutter_smooth.

✨ Acknowledgments and contributors

Firstly, I want to sincerely