#[macro_export]
macro_rules! declare_simple_unit {
($unit_enum:ident, $si_unit:ident, $si_symbol:literal) => {
#[derive(Copy, Clone, Debug, PartialOrd, PartialEq)]
pub enum $unit_enum {
Base(f64, fn(f64) -> f64, &'static str),
Canonical(f64),
$si_unit(f64)
}
impl Unit<$unit_enum> for $unit_enum {
fn to_si_unit(&self) -> $unit_enum {
match self {
$unit_enum::Base(_, _, _) => self.clone(),
$unit_enum::Canonical(value) => $unit_enum::Base(value.clone(), |x| x, $si_symbol),
$unit_enum::$si_unit(value) => $unit_enum::Base(value.clone(), |x| x, $si_symbol),
}
}
}
declare_unit_basics!($unit_enum);
};
}
#[macro_export]
macro_rules! declare_unit_basics {
($unit_enum:ident) => {
impl Primitive for $unit_enum {
fn to_si_primitive(&self) -> f64 {
match self.to_si_unit() {
$unit_enum::Base(value, _, _) => value,
_ => panic!("non si unit post to_si_unit() call"),
}
}
}
impl Add for $unit_enum {
type Output = $unit_enum;
fn add(self, rhs: Self) -> Self::Output {
match self.to_si_unit() {
$unit_enum::Base(value, from_si, symbol) => $unit_enum::Base(value + rhs.to_si_primitive(), from_si, symbol),
_ => panic!("non si unit post to_si_unit() call"),
}
}
}
impl AddAssign for $unit_enum {
fn add_assign(&mut self, rhs: Self) {
match self.to_si_unit() {
$unit_enum::Base(value, from_si, symbol) => *self = $unit_enum::Base(value + rhs.to_si_primitive(), from_si, symbol),
_ => panic!("non si unit post to_si_unit() call"),
}
}
}
impl Sub for $unit_enum {
type Output = $unit_enum;
fn sub(self, rhs: Self) -> Self::Output {
match self.to_si_unit() {
$unit_enum::Base(value, from_si, symbol) => $unit_enum::Base(value - rhs.to_si_primitive(), from_si, symbol),
_ => panic!("non si unit post to_si_unit() call"),
}
}
}
impl SubAssign for $unit_enum {
fn sub_assign(&mut self, rhs: Self) {
match self.to_si_unit() {
$unit_enum::Base(value, from_si, symbol) => *self = $unit_enum::Base(value - rhs.to_si_primitive(), from_si, symbol),
_ => panic!("non si unit post to_si_unit() call"),
}
}
}
impl Mul<$unit_enum> for f64 {
type Output = $unit_enum;
fn mul(self, rhs: $unit_enum) -> Self::Output {
match rhs.to_si_unit() {
$unit_enum::Base(value, from_si, symbol) => $unit_enum::Base(self * value, from_si, symbol),
_ => panic!("non si unit post to_si_unit() call"),
}
}
}
impl Mul<f64> for $unit_enum {
type Output = $unit_enum;
fn mul(self, rhs: f64) -> Self::Output {
match self.to_si_unit() {
$unit_enum::Base(value, from_si, symbol) => $unit_enum::Base(value * rhs, from_si, symbol),
_ => panic!("non si unit post to_si_unit() call"),
}
}
}
impl MulAssign<f64> for $unit_enum {
fn mul_assign(&mut self, rhs: f64) {
match self.to_si_unit() {
$unit_enum::Base(value, from_si, symbol) => *self = $unit_enum::Base(rhs * value, from_si, symbol),
_ => panic!("non si unit post to_si_unit() call"),
}
}
}
impl Div<f64> for $unit_enum {
type Output = $unit_enum;
fn div(self, rhs: f64) -> Self::Output {
match self.to_si_unit() {
$unit_enum::Base(value, from_si, symbol) => $unit_enum::Base(value / rhs, from_si, symbol),
_ => panic!("non si unit post to_si_unit() call"),
}
}
}
impl DivAssign<f64> for $unit_enum {
fn div_assign(&mut self, rhs: f64) {
match self.to_si_unit() {
$unit_enum::Base(value, from_si, symbol) => *self = $unit_enum::Base(value / rhs, from_si, symbol),
_ => panic!("non si unit post to_si_unit() call"),
}
}
}
impl Div<$unit_enum> for $unit_enum {
type Output = f64;
fn div(self, rhs: $unit_enum) -> Self::Output {
self.to_si_primitive() / rhs.to_si_primitive()
}
}
impl Display for $unit_enum {
fn fmt(&self, f: &mut Formatter<'_>) -> Result {
match self.to_si_unit() {
$unit_enum::Base(value, from_si, symbol) => write!(f, "{}[{}]", from_si(value), symbol),
_ => panic!("Display: non si unit post to_si_unit() call"),
}
}
}
pub use $unit_enum::*;
};
}
#[macro_export]
macro_rules! declare_unit_square {
($base:ident, $product:ident) => {
impl Mul<$base> for $base {
type Output = $product;
fn mul(self, rhs: $base) -> Self::Output {
$product::Canonical(self.to_si_primitive() * rhs.to_si_primitive())
}
}
impl Div<$base> for $product {
type Output = $base;
fn div(self, rhs: $base) -> Self::Output {
$base::Canonical(self.to_si_primitive() / rhs.to_si_primitive())
}
}
};
}
#[macro_export]
macro_rules! declare_unit_multiplication {
($factor_a:ident, $factor_b:ident, $product:ident) => {
impl Mul<$factor_a> for $factor_b {
type Output = $product;
fn mul(self, rhs: $factor_a) -> Self::Output {
$product::Canonical(self.to_si_primitive() * rhs.to_si_primitive())
}
}
impl Mul<$factor_b> for $factor_a {
type Output = $product;
fn mul(self, rhs: $factor_b) -> Self::Output {
$product::Canonical(self.to_si_primitive() * rhs.to_si_primitive())
}
}
impl Div<$factor_a> for $product {
type Output = $factor_b;
fn div(self, rhs: $factor_a) -> Self::Output {
$factor_b::Canonical(self.to_si_primitive() / rhs.to_si_primitive())
}
}
impl Div<$factor_b> for $product {
type Output = $factor_a;
fn div(self, rhs: $factor_b) -> Self::Output {
$factor_a::Canonical(self.to_si_primitive() / rhs.to_si_primitive())
}
}
};
}