injectable-rs

A compile-time dependency injection (DI) framework for Rust using extractor-based DI, inspired by Axum's typed extraction model.

No TypeId in the public API, no runtime reflection, no HashMap<TypeId, Box<dyn Any>>. Dependencies are resolved through typed extractors, provider chains are generated at compile time, and dependency traversal is statically encoded into generated provider implementations.

Features

• #[injectable] derive macro for your own types
• bind! / container! macros for composing a DI container
• Inject extractor for constructor-style injection
• Lazy resolution: dependencies are only constructed when requested
• Optional axum integration (features = ["axum"])

Quick start

use injectable_rs::{Injectable, Inject, Container};

#[injectable]
#[derive(Default)]
pub struct Database { pool_size: usize }

#[injectable]
#[derive(Default)]
pub struct UserService { db: std::sync::Arc<Database> }

fn main() {
    let container = Container::new();
    let svc: UserService = container.inject();
    // ...
}

License

Dual-licensed under MIT OR Apache-2.0.