dims_core 0.4.1

Core Utils for Generating Units and Systems
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40

use super::*;
use core::fmt;
use core::marker::PhantomData;
/// A Simple Unit in a given MeasureSystem
///
/// The equations for Unit are as follows:
///
/// `self.to_base = (val + self.offset) * self.ratio`
///
/// `self.to_self = (val / self.ratio) - self.offset`
///
/// If greater flexibility is required, please see `UnitTrait
#[derive(PartialEq)]
pub struct UnitSimple<'t, S: MS> {
    pub system: PhantomData<&'t S>,
    pub ratio: S::N,
    pub offset: S::N,
}

impl<'t, S: MS> UnitTrait for UnitSimple<'t, S> {
    type System = S;
    fn from(&self, val: S::N) -> Measure<S> {
        Measure::new(self, val)
    }
    fn to_base(&self, val: S::N) -> S::N {
        (val + &self.offset) * &self.ratio
    }
    fn to_self(&self, val: S::N) -> S::N {
        (val / &self.ratio) - &self.offset
    }
}

impl<'t, S: MS> fmt::Debug for UnitSimple<'t, S> {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        f.debug_struct("UnitSimple")
            .field("ratio", &self.ratio)
            .field("offset", &self.offset)
            .finish()
    }
}