use num_traits;
pub trait Zero {
fn zero() -> Self;
}
impl<T: num_traits::Zero> Zero for T {
fn zero() -> T { num_traits::Zero::zero() }
}
pub trait One {
fn one() -> Self;
}
impl<T: num_traits::One> One for T {
fn one() -> T { num_traits::One::one() }
}
pub trait Round : Copy { fn round(self) -> Self; }
pub trait Floor : Copy { fn floor(self) -> Self; }
pub trait Ceil : Copy { fn ceil(self) -> Self; }
macro_rules! num_int {
($ty:ty) => (
impl Round for $ty {
#[inline]
fn round(self) -> $ty { self }
}
impl Floor for $ty {
#[inline]
fn floor(self) -> $ty { self }
}
impl Ceil for $ty {
#[inline]
fn ceil(self) -> $ty { self }
}
)
}
macro_rules! num_float {
($ty:ty) => (
impl Round for $ty {
#[inline]
fn round(self) -> $ty { self.round() }
}
impl Floor for $ty {
#[inline]
fn floor(self) -> $ty { self.floor() }
}
impl Ceil for $ty {
#[inline]
fn ceil(self) -> $ty { self.ceil() }
}
)
}
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);