may 0.3.51

Rust Stackful Coroutine Library
Documentation 
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#[rustversion::nightly]
const NIGHTLY: bool = true;

#[rustversion::not(nightly)]
const NIGHTLY: bool = false;

fn main() {
    println!("cargo:rustc-check-cfg=cfg(nightly)");
    if NIGHTLY {
        println!("cargo:rustc-cfg=nightly");
    }
}