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use super::*;
/// A ratio of a whole.
///
/// _Note_: `50%` is represented as `0.5` here, but stored as `50.0` in the
/// corresponding [literal](crate::syntax::ast::Numeric).
#[derive(Default, Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]
pub struct Ratio(Scalar);
impl Ratio {
/// A ratio of `0%` represented as `0.0`.
pub const fn zero() -> Self {
Self(Scalar(0.0))
}
/// A ratio of `100%` represented as `1.0`.
pub const fn one() -> Self {
Self(Scalar(1.0))
}
/// Create a new ratio from a value, where `1.0` means `100%`.
pub const fn new(ratio: f64) -> Self {
Self(Scalar(ratio))
}
/// Get the underlying ratio.
pub const fn get(self) -> f64 {
(self.0).0
}
/// Whether the ratio is zero.
pub fn is_zero(self) -> bool {
self.0 == 0.0
}
/// Whether the ratio is one.
pub fn is_one(self) -> bool {
self.0 == 1.0
}
/// The absolute value of this ratio.
pub fn abs(self) -> Self {
Self::new(self.get().abs())
}
/// Return the ratio of the given `whole`.
pub fn of<T: Numeric>(self, whole: T) -> T {
let resolved = whole * self.get();
if resolved.is_finite() {
resolved
} else {
T::zero()
}
}
}
impl Debug for Ratio {
fn fmt(&self, f: &mut Formatter) -> fmt::Result {
write!(f, "{}%", round_2(100.0 * self.get()))
}
}
impl Neg for Ratio {
type Output = Self;
fn neg(self) -> Self {
Self(-self.0)
}
}
impl Add for Ratio {
type Output = Self;
fn add(self, other: Self) -> Self {
Self(self.0 + other.0)
}
}
sub_impl!(Ratio - Ratio -> Ratio);
impl Mul for Ratio {
type Output = Self;
fn mul(self, other: Self) -> Self {
Self(self.0 * other.0)
}
}
impl Mul<f64> for Ratio {
type Output = Self;
fn mul(self, other: f64) -> Self {
Self(self.0 * other)
}
}
impl Mul<Ratio> for f64 {
type Output = Ratio;
fn mul(self, other: Ratio) -> Ratio {
other * self
}
}
impl Div<f64> for Ratio {
type Output = Self;
fn div(self, other: f64) -> Self {
Self(self.0 / other)
}
}
impl Div for Ratio {
type Output = f64;
fn div(self, other: Self) -> f64 {
self.get() / other.get()
}
}
assign_impl!(Ratio += Ratio);
assign_impl!(Ratio -= Ratio);
assign_impl!(Ratio *= Ratio);
assign_impl!(Ratio *= f64);
assign_impl!(Ratio /= f64);
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