euphony-units 0.1.1

Core types and traits for music composition
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

//! https://en.wikipedia.org/wiki/Chromatic_scale

use crate::pitch::interval::Interval;

named_interval!(A(0, 1)); // 0/12
named_interval!(B(1, 6)); // 2/12
named_interval!(C(1, 4)); // 3/12
named_interval!(D(5, 12));
named_interval!(E(7, 12));
named_interval!(F(2, 3)); // 8/12
named_interval!(G(5, 6)); // 10/12

named_interval!(SEMITONE(1, 12));
named_interval!(WHOLETONE(1, 6));

pub trait ChromaticInterval {
    fn sharp(self) -> Self;
    fn flat(self) -> Self;
}

impl ChromaticInterval for Interval {
    fn sharp(self) -> Self {
        self + SEMITONE
    }

    fn flat(self) -> Self {
        self - SEMITONE
    }
}

#[test]
fn modifier_test() {
    assert_eq!(A.sharp(), B.flat());
}