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use std::fmt;
use std::marker::PhantomData;
use crate::ops::*;
pub trait Amount: Copy + Clone {}
pub trait Quantity {
type AmountType: Amount;
type UnitsType;
fn new(amount: Self::AmountType) -> Self;
fn amount(&self) -> Self::AmountType;
}
pub trait ConvertUnits<T> {
fn convert_from(v: T) -> Self;
fn convert_into(self) -> T;
}
pub trait CastAmount<T> {
fn cast_from(v: T) -> Self;
fn cast_into(self) -> T;
}
#[derive(Copy, Clone, Debug, Default, Eq, PartialEq)]
pub struct QuantityT<T, U>
where
T: Amount,
{
amount: T,
_u: PhantomData<U>,
}
impl<T, U> QuantityT<T, U>
where
T: Amount,
{
pub fn new(amount: T) -> QuantityT<T, U> {
QuantityT {
amount: amount,
_u: PhantomData,
}
}
}
impl<T, U> Quantity for QuantityT<T, U>
where
T: Amount,
{
type AmountType = T;
type UnitsType = U;
fn new(amount: T) -> Self {
QuantityT::<T, U>::new(amount)
}
fn amount(&self) -> Self::AmountType {
self.amount
}
}
impl<T, Q> std::ops::Add<Self> for QuantityT<T, Q>
where
T: Amount + std::ops::Add<T>,
Q: std::ops::Add<Q>,
AddOutput<T, T>: Amount,
{
type Output = QuantityT<AddOutput<T, T>, AddOutput<Q, Q>>;
fn add(self, other: Self) -> Self::Output {
Self::Output::new(self.amount + other.amount)
}
}
impl<T, Q> std::ops::Sub<Self> for QuantityT<T, Q>
where
T: Amount + std::ops::Sub<T>,
Q: std::ops::Sub<Q>,
SubOutput<T, T>: Amount,
{
type Output = QuantityT<SubOutput<T, T>, SubOutput<Q, Q>>;
fn sub(self, other: Self) -> Self::Output {
Self::Output::new(self.amount - other.amount)
}
}
impl<T, Q0, Q1> std::ops::Mul<QuantityT<T, Q1>> for QuantityT<T, Q0>
where
T: Amount + std::ops::Mul<T>,
Q0: std::ops::Mul<Q1>,
MulOutput<T, T>: Amount,
{
type Output = QuantityT<MulOutput<T, T>, MulOutput<Q0, Q1>>;
fn mul(self, other: QuantityT<T, Q1>) -> Self::Output {
Self::Output::new(self.amount * other.amount)
}
}
impl<T, Q0, Q1> std::ops::Div<QuantityT<T, Q1>> for QuantityT<T, Q0>
where
T: Amount + std::ops::Div<T>,
Q0: std::ops::Div<Q1>,
DivOutput<T, T>: Amount,
{
type Output = QuantityT<DivOutput<T, T>, DivOutput<Q0, Q1>>;
fn div(self, other: QuantityT<T, Q1>) -> Self::Output {
Self::Output::new(self.amount / other.amount)
}
}
impl<T, U> std::fmt::Display for QuantityT<T, U>
where
T: std::fmt::Display + Amount,
U: std::fmt::Display + Default,
{
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{} {}", self.amount, U::default())
}
}
impl<T, U> Invert for QuantityT<T, U>
where
T: Invert + Amount,
U: Invert,
InvertOutput<T>: Amount,
{
type Output = QuantityT<InvertOutput<T>, InvertOutput<U>>;
fn invert(self) -> Self::Output {
Self::Output::new(self.amount.invert())
}
}
impl<T, U> Sqrt for QuantityT<T, U>
where
T: num_traits::float::Float + Amount,
U: Sqrt,
{
type Output = QuantityT<T, SqrtOutput<U>>;
fn sqrt(self) -> Self::Output {
Self::Output::new(self.amount.sqrt())
}
}
impl<T, U> std::convert::From<T> for QuantityT<T, U>
where
T: Amount,
{
fn from(value: T) -> Self {
Self::new(value)
}
}
impl Amount for i8 {}
impl Amount for i16 {}
impl Amount for i32 {}
impl Amount for i64 {}
impl Amount for i128 {}
impl Amount for u8 {}
impl Amount for u16 {}
impl Amount for u32 {}
impl Amount for u64 {}
impl Amount for u128 {}
impl Amount for f32 {}
impl Amount for f64 {}