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use core::ops::{Add, Sub, Mul, Div, Rem, Neg, AddAssign, SubAssign, DivAssign, MulAssign};
use core::cmp::{PartialOrd};
use crate::cmath::{CScalar};
pub trait Scalar<Rhs = Self, Output = Self> :
Add<Rhs, Output = Output>
+ Sub<Rhs, Output = Output>
+ Mul<Rhs, Output = Output>
+ Div<Rhs, Output = Output>
+ Rem<Rhs, Output = Output>
+ DivAssign<Rhs>
+ MulAssign<Rhs>
+ Neg<Output = Output>
+ AddAssign<Rhs>
+ SubAssign<Rhs>
+ PartialOrd
+ Clone + Copy
{
fn zero() -> Self;
fn epsilon() -> Self;
fn one() -> Self;
fn two() -> Self;
fn half() -> Self;
fn quarter() -> Self;
fn l8192() -> Self;
fn tsin(self) -> Self;
fn tcos(self) -> Self;
fn ttan(self) -> Self;
fn tacos(self) -> Self;
fn tsqrt(self) -> Self;
fn tabs(self) -> Self;
fn min(l: Self, r: Self) -> Self;
fn max(l: Self, r: Self) -> Self;
fn squared(l: Self) -> Self;
}
trait Epsilon {
fn epsilon() -> Self;
}
impl Epsilon for i32 {
fn epsilon() -> Self { 0 }
}
impl Epsilon for i64 {
fn epsilon() -> Self { 0 }
}
impl Epsilon for f32 {
fn epsilon() -> Self { 1.0 / (1024.0 * 1024.0) }
}
impl Epsilon for f64 {
fn epsilon() -> Self { 1.0 / (1024.0 * 1024.0 * 1024.0 * 1024.0) }
}
macro_rules! impl_scalar {
($scalar:ident, $float:ident) => {
impl Scalar for $scalar {
fn epsilon() -> $scalar { <$scalar as Epsilon>::epsilon() }
fn zero() -> $scalar { 0 as $scalar }
fn one() -> $scalar { 1 as $scalar }
fn two() -> $scalar { 2 as $scalar }
fn half() -> $scalar { 0.5 as $scalar }
fn quarter() -> $scalar { 0.25 as $scalar }
fn tsqrt(self) -> $scalar { (self as $float).sqrt() as $scalar }
fn tsin(self) -> $scalar { (self as $float).sin() as $scalar }
fn tcos(self) -> $scalar { (self as $float).cos() as $scalar }
fn ttan(self) -> $scalar { (self as $float).tan() as $scalar }
fn tacos(self) -> $scalar { (self as $float).acos() as $scalar }
fn tabs(self) -> $scalar { self.abs() }
fn l8192() -> $scalar { 8192 as $scalar }
fn min(l: Self, r: Self) -> Self { if l < r { l } else { r } }
fn max(l: Self, r: Self) -> Self { if l > r { l } else { r } }
fn squared(l: Self) -> Self { l * l }
}
}
}
impl_scalar!(i32, f32);
impl_scalar!(i64, f64);
impl_scalar!(f32, f32);
impl_scalar!(f64, f64);
pub trait FloatScalar : Scalar {
fn infinity() -> Self;
}
impl FloatScalar for f32 {
fn infinity() -> Self { core::f32::INFINITY }
}
impl FloatScalar for f64 {
fn infinity() -> Self { core::f64::INFINITY }
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
pub fn test() {
let out = -1.0;
let f = out.tabs();
assert_eq!(f, 1.0);
}
}