typus_fugit 0.1.2

use crate::helpers::Helpers;
use crate::Rate;
use core::cmp::Ordering;
use core::convert;
use core::marker::PhantomData;
use core::ops;
use typenum::{NonZero, Unsigned, U100, U36};
mod period;
pub use period::Period;

/// Represents a duration of time.
///
/// The generic `T` can either be `u32` or `u64`, typenums represent the Period in seconds
/// Duration in seconds is calculated as `Numer / Denom * ticks`
#[derive(Clone, Copy, Debug)]
pub struct Duration<T, Numer, Denom: NonZero> {
    pub(crate) ticks: T,
    pub(crate) _period: Period<Numer, Denom>,
}

macro_rules! shorthand {
    ($i:ty, $nom:ty, $denum:ty, $unit:ident, $to_unit:ident, $unital:ident, $unitstr:literal) => {
        #[doc = concat!("Convert the Duration to an integer number of ", $unitstr, ".")]
        #[inline]
        pub const fn $to_unit(&self) -> $i {
            (Helpers::<$nom, $denum, Numer, Denom>::LD_TIMES_RN as $i * self.ticks)
                / Helpers::<$nom, $denum, Numer, Denom>::RD_TIMES_LN as $i
        }

        #[doc = concat!("Shorthand for creating a duration which represents ", $unitstr, ".")]
        #[inline]
        pub const fn $unit(val: $i) -> Self {
            Self::from_ticks(
                (Helpers::<$nom, $denum, Numer, Denom>::RD_TIMES_LN as $i * val)
                    / Helpers::<$nom, $denum, Numer, Denom>::LD_TIMES_RN as $i
            )
        }

        #[doc = concat!("Shorthand for creating a duration which represents ", $unitstr, " (ceil rounded).")]
        #[inline]
        pub const fn $unital(val: $i) -> Self {
            let mul = Helpers::<$nom, $denum, Numer, Denom>::RD_TIMES_LN as $i * val;
            let ld_times_rn = Helpers::<$nom, $denum, Numer, Denom>::LD_TIMES_RN as $i;
            Self::from_ticks(if mul % ld_times_rn == 0 {
                mul / ld_times_rn
            } else {
                mul / ld_times_rn + 1
            })
        }
    };
}

macro_rules! impl_duration_for_integer {
    ($i:ty) => {
        impl<Numer: Unsigned, Denom: Unsigned + NonZero> Duration<$i, Numer, Denom> {
            /// Create a `Duration` from a ticks value.
            ///
            /// ```
            /// # use typus_fugit::*;
            #[doc = concat!("let _d = Duration::<", stringify!($i), ", typenum::U1, typenum::U1000>::from_ticks(1);")]
            /// ```
            #[inline]
            pub const fn from_ticks(ticks: $i) -> Self {
                Duration { ticks, _period: Period{_numer: PhantomData, _denom: PhantomData} }
            }

            /// Extract the ticks from a `Duration`.
            ///
            /// ```
            /// # use typus_fugit::*;
            #[doc = concat!("let d = Duration::<", stringify!($i), ", typenum::U1, typenum::U1000>::from_ticks(234);")]
            ///
            /// assert_eq!(d.ticks(), 234);
            /// ```
            #[inline]
            pub const fn ticks(&self) -> $i {
                self.ticks
            }

            /// Returns true if this `Duration` spans no time
            ///
            /// ```
            /// # use typus_fugit::*;
            #[doc = concat!("let zero = Duration::<", stringify!($i), ", typenum::U1, typenum::U1000>::from_ticks(0);")]
            #[doc = concat!("let one = Duration::<", stringify!($i), ", typenum::U1, typenum::U1000>::from_ticks(1);")]
            ///
            /// assert_eq!(zero.is_zero(), true);
            /// assert_eq!(one.is_zero(), false);
            /// ```
            #[inline]
            pub const fn is_zero(&self) -> bool {
                self.ticks == 0
            }

            /// Add two durations while checking for overflow.
            ///
            /// ```
            /// # use typus_fugit::*;
            #[doc = concat!("let d1 = Duration::<", stringify!($i), ", typenum::U1, typenum::U1000>::from_ticks(1);")]
            #[doc = concat!("let d2 = Duration::<", stringify!($i), ", typenum::U1, typenum::U1000>::from_ticks(2);")]
            #[doc = concat!("let d3 = Duration::<", stringify!($i), ", typenum::U1, typenum::U1000>::from_ticks(", stringify!($i), "::MAX);")]
            ///
            /// assert_eq!(d1.checked_add(d2).unwrap().ticks(), 3);
            /// assert_eq!(d1.checked_add(d3), None);
            /// ```
            pub const fn checked_add<ONumer: Unsigned, ODenom: Unsigned + NonZero>(
                self,
                other: Duration<$i, ONumer, ODenom>,
            ) -> Option<Self> {
                if Helpers::<Numer, Denom, ONumer, ODenom>::SAME_BASE {
                    if let Some(ticks) = self.ticks.checked_add(other.ticks) {
                        Some(Duration::<$i, Numer, Denom>::from_ticks(ticks))
                    } else {
                        None
                    }
                } else {
                    if let Some(lh) = other
                        .ticks
                        .checked_mul(Helpers::<Numer, Denom, ONumer, ODenom>::LD_TIMES_RN as $i)
                    {
                        let ticks = lh / Helpers::<Numer, Denom, ONumer, ODenom>::RD_TIMES_LN as $i;

                        if let Some(ticks) = self.ticks.checked_add(ticks) {
                            Some(Duration::<$i, Numer, Denom>::from_ticks(ticks))
                        } else {
                            None
                        }
                    } else {
                        None
                    }
                }
            }

            /// Subtract two durations while checking for overflow.
            ///
            /// ```
            /// # use typus_fugit::*;
            #[doc = concat!("let d1 = Duration::<", stringify!($i), ", typenum::U1, typenum::U1000>::from_ticks(1);")]
            #[doc = concat!("let d2 = Duration::<", stringify!($i), ", typenum::U1, typenum::U1000>::from_ticks(2);")]
            #[doc = concat!("let d3 = Duration::<", stringify!($i), ", typenum::U1, typenum::U1000>::from_ticks(", stringify!($i), "::MAX);")]
            ///
            /// assert_eq!(d2.checked_sub(d1).unwrap().ticks(), 1);
            /// assert_eq!(d1.checked_sub(d3), None);
            /// ```
            pub const fn checked_sub<ONumer: Unsigned, ODenom: Unsigned + NonZero>(
                self,
                other: Duration<$i, ONumer, ODenom>,
            ) -> Option<Self> {
                if Helpers::<Numer, Denom, ONumer, ODenom>::SAME_BASE {
                    if let Some(ticks) = self.ticks.checked_sub(other.ticks) {
                        Some(Duration::<$i, Numer, Denom>::from_ticks(ticks))
                    } else {
                        None
                    }
                } else {
                    if let Some(lh) = other
                        .ticks
                        .checked_mul(Helpers::<Numer, Denom, ONumer, ODenom>::LD_TIMES_RN as $i)
                    {
                        let ticks = lh / Helpers::<Numer, Denom, ONumer, ODenom>::RD_TIMES_LN as $i;

                        if let Some(ticks) = self.ticks.checked_sub(ticks) {
                            Some(Duration::<$i, Numer, Denom>::from_ticks(ticks))
                        } else {
                            None
                        }
                    } else {
                        None
                    }
                }
            }

            #[doc = concat!("Const `cmp` for ", stringify!($i))]
            #[inline(always)]
            const fn _const_cmp(a: $i, b: $i) -> Ordering {
                if a < b {
                    Ordering::Less
                } else if a > b {
                    Ordering::Greater
                } else {
                    Ordering::Equal
                }
            }

            /// Const partial comparison.
            ///
            /// ```
            /// # use typus_fugit::*;
            #[doc = concat!("let d1 = Duration::<", stringify!($i), ", typenum::U1, typenum::U100>::from_ticks(1);")]
            #[doc = concat!("let d2 = Duration::<", stringify!($i), ", typenum::U1, typenum::U1000>::from_ticks(1);")]
            ///
            /// assert_eq!(d1.const_partial_cmp(d2), Some(core::cmp::Ordering::Greater));
            /// ```
            #[inline]
            pub const fn const_partial_cmp<RNumer: Unsigned, RDenom: Unsigned + NonZero>(
                self,
                other: Duration<$i, RNumer, RDenom>
            ) -> Option<Ordering> {
                //
                // We want to check:
                //
                // n_lh / d_lh * lh_ticks {cmp} n_rh / d_rh * rh_ticks
                //
                // simplify to
                //
                // n_lh * d_rh * lh_ticks {cmp} n_rh * d_lh * rh_ticks
                //
                // find gdc(n_lh * d_rh, n_rh * d_lh) and use that to make the constants minimal (done
                // with the `helpers::Helpers` struct)
                //
                // then perform the comparison in a comparable basis
                //

                if Helpers::<Numer, Denom, RNumer, RDenom>::SAME_BASE {
                    // If we are in the same base, comparison in trivial
                    Some(Self::_const_cmp(self.ticks, other.ticks))
                } else {
                    let lh = self
                        .ticks
                        .checked_mul(Helpers::<Numer, Denom, RNumer, RDenom>::RD_TIMES_LN as $i);
                    let rh = other
                        .ticks
                        .checked_mul(Helpers::<Numer, Denom, RNumer, RDenom>::LD_TIMES_RN as $i);

                    if let (Some(lh), Some(rh)) = (lh, rh) {
                        Some(Self::_const_cmp(lh, rh))
                    } else {
                        None
                    }
                }
            }

            /// Const equality check.
            ///
            /// ```
            /// # use typus_fugit::*;
            #[doc = concat!("let d1 = Duration::<", stringify!($i), ", typenum::U1, typenum::U100>::from_ticks(1);")]
            #[doc = concat!("let d2 = Duration::<", stringify!($i), ", typenum::U1, typenum::U1000>::from_ticks(10);")]
            ///
            /// assert!(d1.const_eq(d2));
            /// ```
            #[inline]
            pub const fn const_eq<RNumer: Unsigned, RDenom: Unsigned + NonZero>(
                self,
                other: Duration<$i, RNumer, RDenom>
            ) -> bool {
                if Helpers::<Numer, Denom, RNumer, RDenom>::SAME_BASE {
                    // If we are in the same base, comparison in trivial
                    self.ticks == other.ticks
                } else {
                    let lh = self
                        .ticks
                        .checked_mul(Helpers::<Numer, Denom, RNumer, RDenom>::RD_TIMES_LN as $i);
                    let rh = other
                        .ticks
                        .checked_mul(Helpers::<Numer, Denom, RNumer, RDenom>::LD_TIMES_RN as $i);

                    if let (Some(lh), Some(rh)) = (lh, rh) {
                        lh == rh
                    } else {
                        false
                    }
                }
            }

            /// Const try from, checking for overflow.
            ///
            /// ```
            /// # use typus_fugit::*;
            #[doc = concat!("let d1 = Duration::<", stringify!($i), ", typenum::U1, typenum::U100>::from_ticks(1);")]
            #[doc = concat!("let d2 = Duration::<", stringify!($i), ", typenum::U1, typenum::U1000>::const_try_from(d1);")]
            ///
            /// assert_eq!(d2.unwrap().ticks(), 10);
            /// ```
            pub const fn const_try_from<INumer: Unsigned, IDenom: Unsigned + NonZero>(
                duration: Duration<$i, INumer, IDenom>,
            ) -> Option<Self> {
                if Helpers::<INumer, IDenom, Numer, Denom>::SAME_BASE {
                    Some(Self::from_ticks(duration.ticks))
                } else {
                    if let Some(lh) = (duration.ticks as u64)
                        .checked_mul(Helpers::<INumer, IDenom, Numer, Denom>::RD_TIMES_LN as u64)
                    {
                        let ticks = lh / Helpers::<INumer, IDenom, Numer, Denom>::LD_TIMES_RN as u64;

                        if ticks <= <$i>::MAX as u64 {
                            Some(Self::from_ticks(ticks as $i))
                        } else {
                            None
                        }
                    } else {
                        None
                    }
                }
            }

            /// Const try into, checking for overflow.
            ///
            /// ```
            /// # use typus_fugit::*;
            #[doc = concat!("let d1 = Duration::<", stringify!($i), ", typenum::U1, typenum::U100>::from_ticks(1);")]
            #[doc = concat!("let d2: Option<Duration::<", stringify!($i), ", typenum::U1, typenum::U1000>> = d1.const_try_into();")]
            ///
            /// assert_eq!(d2.unwrap().ticks(), 10);
            /// ```
            #[inline]
            pub const fn const_try_into<ONumer: Unsigned, ODenom: Unsigned + NonZero>(
                self,
            ) -> Option<Duration<$i, ONumer, ODenom>> {
                Duration::<$i, ONumer, ODenom>::const_try_from(self)
            }

            /// Const try into rate, checking for divide-by-zero.
            ///
            /// ```
            /// # use typus_fugit::*;
            #[doc = concat!("let d1 = Duration::<", stringify!($i), ", typenum::U1, typenum::U1000>::from_ticks(2);")]
            #[doc = concat!("let r1: Option<Rate::<", stringify!($i), ", typenum::U1, typenum::U1>> = d1.try_into_rate();")]
            ///
            /// assert_eq!(r1.unwrap().raw(), 500);
            /// ```
            #[inline]
            pub const fn try_into_rate<ONumer: Unsigned, ODenom: Unsigned + NonZero>(
                self,
            ) -> Option<Rate<$i, ONumer, ODenom>> {
                Rate::<$i, ONumer, ODenom>::try_from_duration(self)
            }

            /// Convert from duration to rate.
            #[inline]
            pub const fn into_rate<ONumer: Unsigned, ODenom: Unsigned + NonZero>(
                self,
            ) -> Rate<$i, ONumer, ODenom> {
                if let Some(v) = self.try_into_rate() {
                    v
                } else {
                    panic!("Into rate failed, divide-by-zero!");
                }
            }

            /// Const try from rate, checking for divide-by-zero.
            ///
            /// ```
            /// # use typus_fugit::*;
            #[doc = concat!("let r1 = Rate::<", stringify!($i), ", typenum::U1, typenum::U1>::from_raw(1);")]
            #[doc = concat!("let d1 = Duration::<", stringify!($i), ", typenum::U1, typenum::U1000>::try_from_rate(r1);")]
            ///
            /// assert_eq!(d1.unwrap().ticks(), 1_000);
            /// ```
            #[inline]
            pub const fn try_from_rate<INumer: Unsigned, IDenom: Unsigned + NonZero>(
                rate: Rate<$i, INumer, IDenom>,
            ) -> Option<Self> {
                if rate.raw > 0 {
                    Some(Self::from_ticks(
                        Helpers::<INumer, IDenom, Numer, Denom>::RATE_TO_DURATION_NUMERATOR as $i
                        / rate.raw
                    ))
                } else {
                    None
                }
            }

            /// Convert from rate to duration.
            #[inline]
            pub const fn from_rate<INumer: Unsigned, IDenom: Unsigned + NonZero>(
                rate: Rate<$i, INumer, IDenom>,
            ) -> Self {
                if let Some(v) = Self::try_from_rate(rate) {
                    v
                } else {
                    panic!("From rate failed, divide-by-zero!");
                }
            }

            /// Convert between bases for a duration.
            ///
            /// Unfortunately not a `From` impl due to collision with the std lib.
            /// UPDATE v0.4.0: use of typenum instead of const generics may allow for this now.
            ///
            /// ```
            /// # use typus_fugit::*;
            #[doc = concat!("let d1 = Duration::<", stringify!($i), ", typenum::U1, typenum::U100>::from_ticks(1);")]
            #[doc = concat!("let d2: Duration::<", stringify!($i), ", typenum::U1, typenum::U1000> = d1.convert();")]
            ///
            /// assert_eq!(d2.ticks(), 10);
            /// ```
            /// Can be used in const contexts. Compilation will fail if the conversion causes overflow
            /// ```compile_fail
            /// # use typus_fugit::*;
            #[doc = concat!("const TICKS: ", stringify!($i), "= ", stringify!($i), "::MAX - 10;")]
            #[doc = concat!("const D1: Duration::<", stringify!($i), ", typenum::U1, typenum::U100> = Duration::<", stringify!($i), ", typenum::U1, typenum::U100>::from_ticks(TICKS);")]
            /// // Fails conversion due to tick overflow
            #[doc = concat!("const D2: Duration::<", stringify!($i), ", typenum::U1, typenum::U200> = D1.convert();")]
            #[inline]
            pub const fn convert<ONumer: Unsigned, ODenom: Unsigned + NonZero>(
                self,
            ) -> Duration<$i, ONumer, ODenom> {
                if let Some(v) = self.const_try_into() {
                    v
                } else {
                    panic!("Convert failed!");
                }
            }

            shorthand!($i, typenum::U1, typenum::U1000000000, nanos, to_nanos, nanos_at_least, "nanoseconds");
            shorthand!($i, typenum::U1, typenum::U1000000, micros, to_micros, micros_at_least, "microseconds");
            shorthand!($i, typenum::U1, typenum::U1000, millis, to_millis, millis_at_least, "milliseconds");
            shorthand!($i, typenum::U1, typenum::U1, secs, to_secs, secs_at_least, "seconds");
            shorthand!($i, typenum::U60, typenum::U1, minutes, to_minutes, minutes_at_least, "minutes");
            shorthand!($i, typenum::op!(U36 * U100), typenum::U1, hours, to_hours, hours_at_least, "hours");

            /// Shorthand for creating a duration which represents hertz.
            #[inline]
            #[allow(non_snake_case)]
            pub const fn Hz(val: $i) -> Self {
                Self::from_rate(crate::Hertz::<$i>::from_raw(val))
            }

            /// Shorthand for creating a duration which represents kilohertz.
            #[inline]
            #[allow(non_snake_case)]
            pub const fn kHz(val: $i) -> Self {
                Self::from_rate(crate::Kilohertz::<$i>::from_raw(val))
            }

            /// Shorthand for creating a duration which represents megahertz.
            #[inline]
            #[allow(non_snake_case)]
            pub const fn MHz(val: $i) -> Self {
                Self::from_rate(crate::Megahertz::<$i>::from_raw(val))
            }
        }

        impl<LNumer: Unsigned, LDenom: Unsigned + NonZero, RNumer: Unsigned, RDenom: Unsigned + NonZero>
            PartialOrd<Duration<$i, RNumer, RDenom>> for Duration<$i, LNumer, LDenom>
        {
            #[inline]
            fn partial_cmp(&self, other: &Duration<$i, RNumer, RDenom>) -> Option<Ordering> {
                self.const_partial_cmp(*other)
            }
        }

        impl<Numer: Unsigned, Denom: Unsigned + NonZero> Ord for Duration<$i, Numer, Denom> {
            #[inline]
            fn cmp(&self, other: &Self) -> Ordering {
                Self::_const_cmp(self.ticks, other.ticks)
            }
        }

        impl<LNumer: Unsigned, LDenom: Unsigned + NonZero, RNumer: Unsigned, RDenom: Unsigned + NonZero>
            PartialEq<Duration<$i, RNumer, RDenom>> for Duration<$i, LNumer, LDenom>
        {
            #[inline]
            fn eq(&self, other: &Duration<$i, RNumer, RDenom>) -> bool {
                self.const_eq(*other)
            }
        }

        impl<Numer: Unsigned, Denom: Unsigned + NonZero> Eq for Duration<$i, Numer, Denom> {}

        // Duration - Duration = Duration (only same base until const_generics_defaults is
        // stabilized)
        // UPDATE v0.4.0: With `typenum`, this should now be implementable
        impl<Numer: Unsigned, Denom: Unsigned + NonZero> ops::Sub<Duration<$i, Numer, Denom>>
            for Duration<$i, Numer, Denom>
        {
            type Output = Duration<$i, Numer, Denom>;

            #[inline]
            fn sub(self, other: Duration<$i, Numer, Denom>) -> Self::Output {
                if let Some(v) = self.checked_sub(other) {
                    v
                } else {
                    panic!("Sub failed!");
                }
            }
        }

        // Duration -= Duration
        impl<Numer: Unsigned, Denom: Unsigned + NonZero> ops::SubAssign<Duration<$i, Numer, Denom>>
            for Duration<$i, Numer, Denom>
        {
            #[inline]
            fn sub_assign(&mut self, other: Self) {
                *self = *self - other;
            }
        }

        // Duration + Duration = Duration (only same base until const_generics_defaults is
        // stabilized)
        // UPDATE v0.4.0: With `typenum`, this should now be implementable
        impl<Numer: Unsigned, Denom: Unsigned + NonZero> ops::Add<Duration<$i, Numer, Denom>>
            for Duration<$i, Numer, Denom>
        {
            type Output = Duration<$i, Numer, Denom>;

            #[inline]
            fn add(self, other: Duration<$i, Numer, Denom>) -> Self::Output {
                if let Some(v) = self.checked_add(other) {
                    v
                } else {
                    panic!("Add failed!");
                }
            }
        }

        // Duration += Duration
        impl<Numer: Unsigned, Denom: Unsigned + NonZero> ops::AddAssign<Duration<$i, Numer, Denom>>
            for Duration<$i, Numer, Denom>
        {
            #[inline]
            fn add_assign(&mut self, other: Self) {
                *self = *self + other;
            }
        }

        // integer * Duration = Duration
        impl<Numer: Unsigned, Denom: Unsigned + NonZero> ops::Mul<Duration<$i, Numer, Denom>> for u32 {
            type Output = Duration<$i, Numer, Denom>;

            #[inline]
            fn mul(self, mut other: Duration<$i, Numer, Denom>) -> Self::Output {
                other.ticks *= self as $i;
                other
            }
        }

        // Duration * integer = Duration
        impl<Numer: Unsigned, Denom: Unsigned + NonZero> ops::Mul<u32> for Duration<$i, Numer, Denom> {
            type Output = Duration<$i, Numer, Denom>;

            #[inline]
            fn mul(mut self, other: u32) -> Self::Output {
                self.ticks *= other as $i;
                self
            }
        }

        // Duration *= integer
        impl<Numer: Unsigned, Denom: Unsigned + NonZero> ops::MulAssign<u32>
            for Duration<$i, Numer, Denom>
        {
            #[inline]
            fn mul_assign(&mut self, other: u32) {
                *self = *self * other;
            }
        }

        // Duration / integer = Duration
        impl<Numer: Unsigned, Denom: Unsigned + NonZero> ops::Div<u32> for Duration<$i, Numer, Denom> {
            type Output = Duration<$i, Numer, Denom>;

            #[inline]
            fn div(mut self, other: u32) -> Self::Output {
                self.ticks /= other as $i;
                self
            }
        }

        // Duration /= integer
        impl<Numer: Unsigned, Denom: Unsigned + NonZero> ops::DivAssign<u32>
            for Duration<$i, Numer, Denom>
        {
            #[inline]
            fn div_assign(&mut self, other: u32) {
                *self = *self / other;
            }
        }

        // Duration / Duration = integer
        impl<LNumer: Unsigned, LDenom: Unsigned + NonZero, RNumer: Unsigned, RDenom: Unsigned + NonZero> ops::Div<Duration<$i, RNumer, RDenom>>
            for Duration<$i, LNumer, LDenom>
        {
            type Output = $i;

            #[inline]
            fn div(self, other: Duration<$i, RNumer, RDenom>) -> Self::Output {
                let conv: Duration<$i, RNumer, RDenom> = self.convert();
                conv.ticks / other.ticks
            }
        }

        #[cfg(feature = "defmt")]
        impl<Numer: Unsigned, Denom: Unsigned + NonZero> defmt::Format for Duration<$i, Numer, Denom>
        {
            fn format(&self, f: defmt::Formatter) {
                if Numer::U64 == 3_600 && Denom::U64 == 1 {
                    defmt::write!(f, "{} h", self.ticks)
                } else if Numer::U64 == 60 && Denom::U64 == 1 {
                    defmt::write!(f, "{} min", self.ticks)
                } else if Numer::U64 == 1 && Denom::U64 == 1 {
                    defmt::write!(f, "{} s", self.ticks)
                } else if Numer::U64 == 1 && Denom::U64 == 1_000 {
                    defmt::write!(f, "{} ms", self.ticks)
                } else if Numer::U64 == 1 && Denom::U64 == 1_000_000 {
                    defmt::write!(f, "{} us", self.ticks)
                } else if Numer::U64 == 1 && Denom::U64 == 1_000_000_000 {
                    defmt::write!(f, "{} ns", self.ticks)
                } else {
                    defmt::write!(f, "{} ticks @ ({}/{})", self.ticks, Numer::U64, Denom::U64)
                }
            }
        }

        impl<Numer: Unsigned, Denom: Unsigned + NonZero> core::fmt::Display for Duration<$i, Numer, Denom> {
            fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
                if Numer::U64 == 3_600 && Denom::U64 == 1 {
                    write!(f, "{} h", self.ticks)
                } else if Numer::U64 == 60 && Denom::U64 == 1 {
                    write!(f, "{} min", self.ticks)
                } else if Numer::U64 == 1 && Denom::U64 == 1 {
                    write!(f, "{} s", self.ticks)
                } else if Numer::U64 == 1 && Denom::U64 == 1_000 {
                    write!(f, "{} ms", self.ticks)
                } else if Numer::U64 == 1 && Denom::U64 == 1_000_000 {
                    write!(f, "{} us", self.ticks)
                } else if Numer::U64 == 1 && Denom::U64 == 1_000_000_000 {
                    write!(f, "{} ns", self.ticks)
                } else {
                    write!(f, "{} ticks @ ({}/{})", self.ticks, Numer::U64, Denom::U64)
                }
            }
        }
    };
}

impl_duration_for_integer!(u32);
impl_duration_for_integer!(u64);

//
// Operations between u32 and u64 Durations
//

impl<Numer: Unsigned, Denom: Unsigned + NonZero> From<Duration<u32, Numer, Denom>>
    for Duration<u64, Numer, Denom>
{
    #[inline]
    fn from(val: Duration<u32, Numer, Denom>) -> Duration<u64, Numer, Denom> {
        Duration::<u64, Numer, Denom>::from_ticks(val.ticks() as u64)
    }
}

impl<Numer: Unsigned, Denom: Unsigned + NonZero> convert::TryFrom<Duration<u64, Numer, Denom>>
    for Duration<u32, Numer, Denom>
{
    type Error = ();

    #[inline]
    fn try_from(val: Duration<u64, Numer, Denom>) -> Result<Duration<u32, Numer, Denom>, ()> {
        Ok(Duration::<u32, Numer, Denom>::from_ticks(
            val.ticks().try_into().map_err(|_| ())?,
        ))
    }
}

// Duration - Duration = Duration (to make shorthands work, until const_generics_defaults is
// stabilized)
// UPDATE v0.4.0: With `typenum`, this should now be implementable
impl<Numer: Unsigned, Denom: Unsigned + NonZero> ops::Sub<Duration<u32, Numer, Denom>>
    for Duration<u64, Numer, Denom>
{
    type Output = Duration<u64, Numer, Denom>;

    #[inline]
    fn sub(self, other: Duration<u32, Numer, Denom>) -> Self::Output {
        if let Some(v) = self.checked_sub(Duration::<u64, Numer, Denom>::from_ticks(
            other.ticks() as u64
        )) {
            v
        } else {
            panic!("Sub failed!");
        }
    }
}

// Duration -= Duration (to make shorthands work, until const_generics_defaults is stabilized)
// UPDATE v0.4.0: With `typenum`, this should now be implementable
impl<Numer: Unsigned, Denom: Unsigned + NonZero> ops::SubAssign<Duration<u32, Numer, Denom>>
    for Duration<u64, Numer, Denom>
{
    #[inline]
    fn sub_assign(&mut self, other: Duration<u32, Numer, Denom>) {
        *self = *self - other;
    }
}

// Duration + Duration = Duration (to make shorthands work, until const_generics_defaults is
// stabilized)
// UPDATE v0.4.0: With `typenum`, this should now be implementable
impl<Numer: Unsigned, Denom: Unsigned + NonZero> ops::Add<Duration<u32, Numer, Denom>>
    for Duration<u64, Numer, Denom>
{
    type Output = Duration<u64, Numer, Denom>;

    #[inline]
    fn add(self, other: Duration<u32, Numer, Denom>) -> Self::Output {
        if let Some(v) = self.checked_add(Duration::<u64, Numer, Denom>::from_ticks(
            other.ticks() as u64
        )) {
            v
        } else {
            panic!("Add failed!");
        }
    }
}

// Duration += Duration (to make shorthands work, until const_generics_defaults is stabilized)
// UPDATE v0.4.0: With `typenum`, this should now be implementable
impl<Numer: Unsigned, Denom: Unsigned + NonZero> ops::AddAssign<Duration<u32, Numer, Denom>>
    for Duration<u64, Numer, Denom>
{
    #[inline]
    fn add_assign(&mut self, other: Duration<u32, Numer, Denom>) {
        *self = *self + other;
    }
}

impl<
        LNumer: Unsigned,
        LDenom: Unsigned + NonZero,
        RNumer: Unsigned,
        RDenom: Unsigned + NonZero,
    > PartialOrd<Duration<u32, RNumer, RDenom>> for Duration<u64, LNumer, LDenom>
{
    #[inline]
    fn partial_cmp(&self, other: &Duration<u32, RNumer, RDenom>) -> Option<Ordering> {
        self.partial_cmp(&Duration::<u64, RNumer, RDenom>::from_ticks(
            other.ticks() as u64
        ))
    }
}

impl<
        LNumer: Unsigned,
        LDenom: Unsigned + NonZero,
        RNumer: Unsigned,
        RDenom: Unsigned + NonZero,
    > PartialEq<Duration<u32, RNumer, RDenom>> for Duration<u64, LNumer, LDenom>
{
    #[inline]
    fn eq(&self, other: &Duration<u32, RNumer, RDenom>) -> bool {
        self.eq(&Duration::<u64, RNumer, RDenom>::from_ticks(
            other.ticks() as u64
        ))
    }
}

impl<
        LNumer: Unsigned,
        LDenom: Unsigned + NonZero,
        RNumer: Unsigned,
        RDenom: Unsigned + NonZero,
    > PartialOrd<Duration<u64, RNumer, RDenom>> for Duration<u32, LNumer, LDenom>
{
    #[inline]
    fn partial_cmp(&self, other: &Duration<u64, RNumer, RDenom>) -> Option<Ordering> {
        Duration::<u64, LNumer, LDenom>::from_ticks(self.ticks as u64).partial_cmp(other)
    }
}

impl<
        LNumer: Unsigned,
        LDenom: Unsigned + NonZero,
        RNumer: Unsigned,
        RDenom: Unsigned + NonZero,
    > PartialEq<Duration<u64, RNumer, RDenom>> for Duration<u32, LNumer, LDenom>
{
    #[inline]
    fn eq(&self, other: &Duration<u64, RNumer, RDenom>) -> bool {
        Duration::<u64, LNumer, LDenom>::from_ticks(self.ticks as u64).eq(other)
    }
}

/// Extension trait for simple short-hands for u32 Durations
pub trait ExtU32 {
    /// Shorthand for creating a duration which represents nanoseconds.
    fn nanos<Numer: Unsigned, Denom: Unsigned + NonZero>(self) -> Duration<u32, Numer, Denom>;

    /// Shorthand for creating a duration which represents microseconds.
    fn micros<Numer: Unsigned, Denom: Unsigned + NonZero>(self) -> Duration<u32, Numer, Denom>;

    /// Shorthand for creating a duration which represents milliseconds.
    fn millis<Numer: Unsigned, Denom: Unsigned + NonZero>(self) -> Duration<u32, Numer, Denom>;

    /// Shorthand for creating a duration which represents seconds.
    fn secs<Numer: Unsigned, Denom: Unsigned + NonZero>(self) -> Duration<u32, Numer, Denom>;

    /// Shorthand for creating a duration which represents minutes.
    fn minutes<Numer: Unsigned, Denom: Unsigned + NonZero>(self) -> Duration<u32, Numer, Denom>;

    /// Shorthand for creating a duration which represents hours.
    fn hours<Numer: Unsigned, Denom: Unsigned + NonZero>(self) -> Duration<u32, Numer, Denom>;
}

impl ExtU32 for u32 {
    #[inline]
    fn nanos<Numer: Unsigned, Denom: Unsigned + NonZero>(self) -> Duration<u32, Numer, Denom> {
        Duration::<u32, Numer, Denom>::nanos(self)
    }

    #[inline]
    fn micros<Numer: Unsigned, Denom: Unsigned + NonZero>(self) -> Duration<u32, Numer, Denom> {
        Duration::<u32, Numer, Denom>::micros(self)
    }

    #[inline]
    fn millis<Numer: Unsigned, Denom: Unsigned + NonZero>(self) -> Duration<u32, Numer, Denom> {
        Duration::<u32, Numer, Denom>::millis(self)
    }

    #[inline]
    fn secs<Numer: Unsigned, Denom: Unsigned + NonZero>(self) -> Duration<u32, Numer, Denom> {
        Duration::<u32, Numer, Denom>::secs(self)
    }

    #[inline]
    fn minutes<Numer: Unsigned, Denom: Unsigned + NonZero>(self) -> Duration<u32, Numer, Denom> {
        Duration::<u32, Numer, Denom>::minutes(self)
    }

    #[inline]
    fn hours<Numer: Unsigned, Denom: Unsigned + NonZero>(self) -> Duration<u32, Numer, Denom> {
        Duration::<u32, Numer, Denom>::hours(self)
    }
}

/// Extension trait for simple short-hands for u32 Durations (ceil rounded)
pub trait ExtU32Ceil {
    /// Shorthand for creating a duration which represents nanoseconds.
    fn nanos_at_least<Numer: Unsigned, Denom: Unsigned + NonZero>(
        self,
    ) -> Duration<u32, Numer, Denom>;

    /// Shorthand for creating a duration which represents microseconds.
    fn micros_at_least<Numer: Unsigned, Denom: Unsigned + NonZero>(
        self,
    ) -> Duration<u32, Numer, Denom>;

    /// Shorthand for creating a duration which represents milliseconds.
    fn millis_at_least<Numer: Unsigned, Denom: Unsigned + NonZero>(
        self,
    ) -> Duration<u32, Numer, Denom>;

    /// Shorthand for creating a duration which represents seconds.
    fn secs_at_least<Numer: Unsigned, Denom: Unsigned + NonZero>(
        self,
    ) -> Duration<u32, Numer, Denom>;

    /// Shorthand for creating a duration which represents minutes.
    fn minutes_at_least<Numer: Unsigned, Denom: Unsigned + NonZero>(
        self,
    ) -> Duration<u32, Numer, Denom>;

    /// Shorthand for creating a duration which represents hours.
    fn hours_at_least<Numer: Unsigned, Denom: Unsigned + NonZero>(
        self,
    ) -> Duration<u32, Numer, Denom>;
}

impl ExtU32Ceil for u32 {
    #[inline]
    fn nanos_at_least<Numer: Unsigned, Denom: Unsigned + NonZero>(
        self,
    ) -> Duration<u32, Numer, Denom> {
        Duration::<u32, Numer, Denom>::nanos_at_least(self)
    }

    #[inline]
    fn micros_at_least<Numer: Unsigned, Denom: Unsigned + NonZero>(
        self,
    ) -> Duration<u32, Numer, Denom> {
        Duration::<u32, Numer, Denom>::micros_at_least(self)
    }

    #[inline]
    fn millis_at_least<Numer: Unsigned, Denom: Unsigned + NonZero>(
        self,
    ) -> Duration<u32, Numer, Denom> {
        Duration::<u32, Numer, Denom>::millis_at_least(self)
    }

    #[inline]
    fn secs_at_least<Numer: Unsigned, Denom: Unsigned + NonZero>(
        self,
    ) -> Duration<u32, Numer, Denom> {
        Duration::<u32, Numer, Denom>::secs_at_least(self)
    }

    #[inline]
    fn minutes_at_least<Numer: Unsigned, Denom: Unsigned + NonZero>(
        self,
    ) -> Duration<u32, Numer, Denom> {
        Duration::<u32, Numer, Denom>::minutes_at_least(self)
    }

    #[inline]
    fn hours_at_least<Numer: Unsigned, Denom: Unsigned + NonZero>(
        self,
    ) -> Duration<u32, Numer, Denom> {
        Duration::<u32, Numer, Denom>::hours_at_least(self)
    }
}

/// Extension trait for simple short-hands for u64 Durations
pub trait ExtU64 {
    /// Shorthand for creating a duration which represents nanoseconds.
    fn nanos<Numer: Unsigned, Denom: Unsigned + NonZero>(self) -> Duration<u64, Numer, Denom>;

    /// Shorthand for creating a duration which represents microseconds.
    fn micros<Numer: Unsigned, Denom: Unsigned + NonZero>(self) -> Duration<u64, Numer, Denom>;

    /// Shorthand for creating a duration which represents milliseconds.
    fn millis<Numer: Unsigned, Denom: Unsigned + NonZero>(self) -> Duration<u64, Numer, Denom>;

    /// Shorthand for creating a duration which represents seconds.
    fn secs<Numer: Unsigned, Denom: Unsigned + NonZero>(self) -> Duration<u64, Numer, Denom>;

    /// Shorthand for creating a duration which represents minutes.
    fn minutes<Numer: Unsigned, Denom: Unsigned + NonZero>(self) -> Duration<u64, Numer, Denom>;

    /// Shorthand for creating a duration which represents hours.
    fn hours<Numer: Unsigned, Denom: Unsigned + NonZero>(self) -> Duration<u64, Numer, Denom>;
}

impl ExtU64 for u64 {
    #[inline]
    fn nanos<Numer: Unsigned, Denom: Unsigned + NonZero>(self) -> Duration<u64, Numer, Denom> {
        Duration::<u64, Numer, Denom>::nanos(self)
    }

    #[inline]
    fn micros<Numer: Unsigned, Denom: Unsigned + NonZero>(self) -> Duration<u64, Numer, Denom> {
        Duration::<u64, Numer, Denom>::micros(self)
    }

    #[inline]
    fn millis<Numer: Unsigned, Denom: Unsigned + NonZero>(self) -> Duration<u64, Numer, Denom> {
        Duration::<u64, Numer, Denom>::millis(self)
    }

    #[inline]
    fn secs<Numer: Unsigned, Denom: Unsigned + NonZero>(self) -> Duration<u64, Numer, Denom> {
        Duration::<u64, Numer, Denom>::secs(self)
    }

    #[inline]
    fn minutes<Numer: Unsigned, Denom: Unsigned + NonZero>(self) -> Duration<u64, Numer, Denom> {
        Duration::<u64, Numer, Denom>::minutes(self)
    }

    #[inline]
    fn hours<Numer: Unsigned, Denom: Unsigned + NonZero>(self) -> Duration<u64, Numer, Denom> {
        Duration::<u64, Numer, Denom>::hours(self)
    }
}

/// Extension trait for simple short-hands for u64 Durations (ceil rounded)
pub trait ExtU64Ceil {
    /// Shorthand for creating a duration which represents nanoseconds.
    fn nanos_at_least<Numer: Unsigned, Denom: Unsigned + NonZero>(
        self,
    ) -> Duration<u64, Numer, Denom>;

    /// Shorthand for creating a duration which represents microseconds.
    fn micros_at_least<Numer: Unsigned, Denom: Unsigned + NonZero>(
        self,
    ) -> Duration<u64, Numer, Denom>;

    /// Shorthand for creating a duration which represents milliseconds.
    fn millis_at_least<Numer: Unsigned, Denom: Unsigned + NonZero>(
        self,
    ) -> Duration<u64, Numer, Denom>;

    /// Shorthand for creating a duration which represents seconds.
    fn secs_at_least<Numer: Unsigned, Denom: Unsigned + NonZero>(
        self,
    ) -> Duration<u64, Numer, Denom>;

    /// Shorthand for creating a duration which represents minutes.
    fn minutes_at_least<Numer: Unsigned, Denom: Unsigned + NonZero>(
        self,
    ) -> Duration<u64, Numer, Denom>;

    /// Shorthand for creating a duration which represents hours.
    fn hours_at_least<Numer: Unsigned, Denom: Unsigned + NonZero>(
        self,
    ) -> Duration<u64, Numer, Denom>;
}

impl ExtU64Ceil for u64 {
    #[inline]
    fn nanos_at_least<Numer: Unsigned, Denom: Unsigned + NonZero>(
        self,
    ) -> Duration<u64, Numer, Denom> {
        Duration::<u64, Numer, Denom>::nanos_at_least(self)
    }

    #[inline]
    fn micros_at_least<Numer: Unsigned, Denom: Unsigned + NonZero>(
        self,
    ) -> Duration<u64, Numer, Denom> {
        Duration::<u64, Numer, Denom>::micros_at_least(self)
    }

    #[inline]
    fn millis_at_least<Numer: Unsigned, Denom: Unsigned + NonZero>(
        self,
    ) -> Duration<u64, Numer, Denom> {
        Duration::<u64, Numer, Denom>::millis_at_least(self)
    }

    #[inline]
    fn secs_at_least<Numer: Unsigned, Denom: Unsigned + NonZero>(
        self,
    ) -> Duration<u64, Numer, Denom> {
        Duration::<u64, Numer, Denom>::secs_at_least(self)
    }

    #[inline]
    fn minutes_at_least<Numer: Unsigned, Denom: Unsigned + NonZero>(
        self,
    ) -> Duration<u64, Numer, Denom> {
        Duration::<u64, Numer, Denom>::minutes_at_least(self)
    }

    #[inline]
    fn hours_at_least<Numer: Unsigned, Denom: Unsigned + NonZero>(
        self,
    ) -> Duration<u64, Numer, Denom> {
        Duration::<u64, Numer, Denom>::hours_at_least(self)
    }
}