// Copyright 2016 Amanieu d'Antras

//

// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or

// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or

// http://opensource.org/licenses/MIT>, at your option. This file may not be

// copied, modified, or distributed except according to those terms.

use std::time::{Duration, Instant};

// Option::unchecked_unwrap

pub trait UncheckedOptionExt<T> {

    unsafe fn unchecked_unwrap(self) -> T;

}

impl<T> UncheckedOptionExt<T> for Option<T> {

    #[inline]

    unsafe fn unchecked_unwrap(self) -> T {

        match self {

            Some(x) => x,

            None => unreachable(),

        }

    }

}

// hint::unreachable_unchecked() in release mode

#[inline]

unsafe fn unreachable() -> ! {

    if cfg!(debug_assertions) {

        unreachable!();

    } else {

        core::hint::unreachable_unchecked()

    }

}

#[inline]

pub fn to_deadline(timeout: Duration) -> Option<Instant> {

    Instant::now().checked_add(timeout)

}