use approx::ApproxEq;
use std::cmp;
use std::fmt;
use std::num::{Float, Int, NumCast};
use std::ops::*;
pub trait PartialOrd {
fn partial_min(self, other: Self) -> Self;
fn partial_max(self, other: Self) -> Self;
}
macro_rules! partial_ord_int (
($T:ident) => (
impl PartialOrd for $T {
fn partial_min(self, other: $T) -> $T { cmp::min(self, other) }
fn partial_max(self, other: $T) -> $T { cmp::max(self, other) }
}
)
);
partial_ord_int!(isize);
partial_ord_int!(i8);
partial_ord_int!(i16);
partial_ord_int!(i32);
partial_ord_int!(i64);
partial_ord_int!(usize);
partial_ord_int!(u8);
partial_ord_int!(u16);
partial_ord_int!(u32);
partial_ord_int!(u64);
macro_rules! partial_ord_float (
($T:ident) => (
impl PartialOrd for $T {
fn partial_min(self, other: $T) -> $T { self.min(other) }
fn partial_max(self, other: $T) -> $T { self.max(other) }
}
)
);
partial_ord_float!(f32);
partial_ord_float!(f64);
pub trait Zero {
fn zero() -> Self;
fn is_zero(&self) -> bool;
}
pub trait One {
fn one() -> Self;
}
pub trait BaseNum:
Copy + NumCast + Clone + Add<Output=Self> + Sub<Output=Self> +
Mul<Output=Self> + Div<Output=Self> + Rem<Output=Self> + Neg<Output=Self> + PartialEq
+ PartialOrd + cmp::PartialOrd + fmt::Debug + Zero + One
{}
macro_rules! impl_basenum_int (
($T: ident) => (
impl BaseNum for $T {}
impl Zero for $T {
fn zero() -> $T {
Int::zero()
}
fn is_zero(&self) -> bool {
*self == Int::zero()
}
}
impl One for $T {
fn one() -> $T {
Int::one()
}
}
)
);
impl_basenum_int!(i8);
impl_basenum_int!(i16);
impl_basenum_int!(i32);
impl_basenum_int!(i64);
impl_basenum_int!(u8);
impl_basenum_int!(u16);
impl_basenum_int!(u32);
impl_basenum_int!(u64);
impl_basenum_int!(isize);
impl_basenum_int!(usize);
macro_rules! impl_basenum_float (
($T: ident) => (
impl BaseNum for $T {}
impl Zero for $T {
fn zero() -> $T {
Float::zero()
}
fn is_zero(&self) -> bool {
*self == Float::zero()
}
}
impl One for $T {
fn one() -> $T {
Float::one()
}
}
)
);
impl_basenum_float!(f32);
impl_basenum_float!(f64);
pub fn zero<T: Zero>() -> T {
Zero::zero()
}
pub fn one<T: One>() -> T {
One::one()
}
pub trait BaseInt : BaseNum + Int {}
impl BaseInt for i8 {}
impl BaseInt for i16 {}
impl BaseInt for i32 {}
impl BaseInt for i64 {}
impl BaseInt for isize {}
impl BaseInt for u8 {}
impl BaseInt for u16 {}
impl BaseInt for u32 {}
impl BaseInt for u64 {}
impl BaseInt for usize {}
pub trait BaseFloat : BaseNum + Float + ApproxEq<Self> {}
impl BaseFloat for f32 {}
impl BaseFloat for f64 {}