rt_init

A simple macro easing the use of Rust's spin::lazy

Motivation

In Rust, defining static variables that require complex initialization often necessitates the use of spin::lazy, which can reduce the readability of the source code. To address this, we have developed a macro system called rt_init (short for runtime init), which simplifies the creation and initialization of multiple static variables.

Example

rt_init! {
    static STATIC1: Vec<u64> = {
        let mut vec = Vec::new();
        vec.push(1);
        vec.push(2);
        vec.push(3);
        vec
    };

    static STATIC2: u64 = 42;
    static STATIC3: String = "Hello, World!".to_string();
}


fn main() {
    println!("Vec   : {:?}", *STATIC1);
    println!("u64   : {:?}", *STATIC2);
    println!("String: {:?}", *STATIC3);
}

In this example, the rt_init! macro allows you to define static variables STATIC1, STATIC2, and STATIC3 with different types and initialization logic. This approach eliminates the need for manual handling with spin::lazy, making the code more concise and easier to understand.