64 lines
1.4 KiB
Rust
64 lines
1.4 KiB
Rust
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use core::fmt;
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use std::fmt::Formatter;
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#[derive(Clone, Debug, PartialEq)]
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pub enum RelativeNote {
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C,
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CSharp,
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D,
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DSharp,
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E,
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F,
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FSharp,
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G,
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GSharp,
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A,
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ASharp,
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B,
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}
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#[derive(Clone, Debug, PartialEq)]
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pub struct Note {
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relative: RelativeNote,
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octave: u8, // upper limit? 8?
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}
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impl fmt::Display for Note {
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fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
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write!(
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f,
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"{}{}",
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match self.relative {
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RelativeNote::C => "C",
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RelativeNote::CSharp => "C#",
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RelativeNote::D => "D",
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RelativeNote::DSharp => "D#",
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RelativeNote::E => "E",
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RelativeNote::F => "F",
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RelativeNote::FSharp => "F#",
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RelativeNote::G => "G",
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RelativeNote::GSharp => "G#",
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RelativeNote::A => "A",
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RelativeNote::ASharp => "A#",
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RelativeNote::B => "B",
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},
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self.octave
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)
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}
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}
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#[cfg(test)]
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mod test {
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use crate::note::{Note, RelativeNote};
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#[test]
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fn c4() {
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assert_eq!(Note { relative: RelativeNote::C, octave: 4 }.to_string(), "C4");
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}
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#[test]
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fn a_sharp_0() {
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assert_eq!(Note { relative: RelativeNote::ASharp, octave: 0 }.to_string(), "A#0");
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}
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}
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