init_static

A Rust library for explicit static initialization.

Overview

init_static provides a macro similar to lazy_static, but with explicit initialization control. This means you decide when your statics are initialized, rather than having them lazily evaluate on first use.

Unlike lazy_static, init_static uses std::sync::OnceLock internally and does not initialize your static values automatically. Instead, it gathers your initialization functions at compile-time using linkme, and provides a function to run them all at once early in your program (for example, inside main()).

Compare to lazy_static

Installation

Add this to your Cargo.toml:

[dependencies]
init_static = { version = "0.4" }

Example

use init_static::init_static;

init_static! {
    static VALUE: u32 = "42".parse()?;
}

#[tokio::main]
async fn main() {
    init_static().await.unwrap();
    println!("{}", *VALUE);
}