async-fs 1.6.0

Async filesystem primitives
Documentation 
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fn main() {
    let cfg = match autocfg::AutoCfg::new() {
        Ok(cfg) => cfg,
        Err(e) => {
            println!(
                "cargo:warning=async-fs: failed to detect compiler features: {}",
                e
            );
            return;
        }
    };

    if !cfg.probe_rustc_version(1, 63) {
        autocfg::emit("async_fs_no_io_safety");
    }
}