// This file was originally copied from https://github.com/servo/euclid/blob/master/src/num.rs.

/// Returns a zero value.

pub trait Zero {

    /// Returns a zero value.

    fn zero() -> Self;

}

impl<T: num_traits::Zero> Zero for T {

}

/// Returns a one value.

pub trait One {

    /// Returns a one value.

    fn one() -> Self;

}

impl<T: num_traits::One> One for T {

}

/// Defines the nearest integer value to the original value.

pub trait Round: Copy {

    /// Rounds to the nearest integer value.

    ///

    /// This behavior is preserved for negative values (unlike the basic cast).

    #[must_use]

    fn round(self) -> Self;

}

/// Defines the biggest integer equal or lower than the original value.

pub trait Floor: Copy {

    /// Rounds to the biggest integer equal or lower than the original value.

    ///

    /// This behavior is preserved for negative values (unlike the basic cast).

    #[must_use]

    fn floor(self) -> Self;

}

/// Defines the smallest integer equal or greater than the original value.

pub trait Ceil: Copy {

    /// Rounds to the smallest integer equal or greater than the original value.

    ///

    /// This behavior is preserved for negative values (unlike the basic cast).

    #[must_use]

    fn ceil(self) -> Self;

}

macro_rules! num_int {

    ($ty:ty) => {

        impl Round for $ty {

            #[inline]

        }

        impl Floor for $ty {

            #[inline]

        }

        impl Ceil for $ty {

            #[inline]

        }

    };

}

macro_rules! num_float {

    ($ty:ty) => {

        impl Round for $ty {

            #[inline]

        }

        impl Floor for $ty {

            #[inline]

        }

        impl Ceil for $ty {

            #[inline]

        }

    };

}

num_int!(i16);

num_int!(u16);

num_int!(i32);

num_int!(u32);

num_int!(i64);

num_int!(u64);

num_int!(isize);

num_int!(usize);

num_float!(f32);

num_float!(f64);