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    //! Tools for working with tasks.

    #![cfg_attr(feature = "cfg-target-has-atomic", feature(cfg_target_has_atomic))]

    #![cfg_attr(not(feature = "std"), no_std)]

    #![warn(missing_docs, missing_debug_implementations, rust_2018_idioms, unreachable_pub)]
    // It cannot be included in the published code because this lints have false positives in the minimum required version.
    #![cfg_attr(test, warn(single_use_lifetimes))]
    #![warn(clippy::all)]
    #![doc(test(attr(deny(warnings), allow(dead_code, unused_assignments, unused_variables))))]

    #[cfg(all(feature = "cfg-target-has-atomic", not(feature = "unstable")))]
    compile_error!("The `cfg-target-has-atomic` feature requires the `unstable` feature as an explicit opt-in to unstable features");

    #[cfg(feature = "alloc")]
    extern crate alloc;

    macro_rules! cfg_target_has_atomic {
        ($($item:item)*) => {$(
            #[cfg_attr(feature = "cfg-target-has-atomic", cfg(target_has_atomic = "ptr"))]
            $item
        )*};
    }

    mod spawn;
    pub use crate::spawn::{Spawn, SpawnError, LocalSpawn};

    cfg_target_has_atomic! {
        #[cfg(feature = "alloc")]
        mod arc_wake;
        #[cfg(feature = "alloc")]
        pub use crate::arc_wake::ArcWake;

        #[cfg(feature = "alloc")]
        mod waker;
        #[cfg(feature = "alloc")]
        pub use crate::waker::waker;

        #[cfg(feature = "alloc")]
        mod waker_ref;
        #[cfg(feature = "alloc")]
        pub use crate::waker_ref::{waker_ref, WakerRef};
    }

    mod future_obj;
    pub use crate::future_obj::{FutureObj, LocalFutureObj, UnsafeFutureObj};

    mod noop_waker;
    pub use crate::noop_waker::noop_waker;
    pub use crate::noop_waker::noop_waker_ref;

    #[doc(no_inline)]
    pub use core::task::{Context, Poll, Waker, RawWaker, RawWakerVTable};