You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: chord.rs
    path of file: ./repos/rust-music-theory/src/chord
    
    the code of the file until where you have to start completion: use crate::chord::errors::ChordError;
use crate::chord::number::Number::Triad;
use crate::chord::{Number, Quality};
use crate::interval::Interval;
use crate::note::{Note, NoteError, Notes, Pitch, NoteLetter};

/// A chord.
#[derive(Debug, Clone)]
pub struct Chord {
    /// The root note of the chord.
    pub root: Pitch,
    /// The octave of the root note of the chord.
    pub octave: u8,
    /// The intervals within the chord.
    pub intervals: Vec<Interval>,
    /// The quality of the chord: major, minor, diminished, etc.
    pub quality: Quality,
    /// The superscript number of the chord: 3, 7, maj7, etc.
    pub number: Number,
    /// The inversion of the chord: 0=root position, 1=first inversion, etc.
    pub inversion: u8,
}

impl Chord {
    /// Create a new chord.
    pub fn new(root: Pitch, quality: Quality, number: Number) -> Self {
        Self::with_inversion(root, quality, number, 0)
    }

    /// Create a new chord with a given inversion.
    pub fn with_inversion(
        root: Pitch,
        quality: Quality,
        number: Number,
        inversion: u8,
    ) -> Self {
        let intervals = Self::chord_intervals(quality, number);
        let inversion = inversion % (intervals.len() + 1) as u8;
        Chord {
            root,
            octave: 4,
            intervals,
            quality,
            number,
            inversion,
        }
    }

    pub fn from_string(string: &str) -> Self {
        let notes: Vec<Pitch> = string.to_string()
                    .replace(",", "")
                    .split_whitespace()
                    .into_iter()
                    .map(|x| Pitch::from_str(x).expect(&format!("Invalid note {:?}.", x)))
                    .collect();

        let intervals: Vec<u8> = notes.iter()
                
    
    pub fn chord_intervals(quality: Quality, number: Number) -> Vec<Interval> {
        use Number::*;
        use Quality::*;
        match (&quality, &number) {
            (Major, Triad) => Interval::from_semitones(&[4, 3]),
            (Minor, Triad) => Interval::from_semitones(&[3, 4]),
            (Suspended2, Triad) => Interval::from_semitones(&[2, 5]),
            (Suspended4, Triad) => Interval::from_semitones(&[5, 2]),
            (Augmented, Triad) => Interval::from_semitones(&[4, 4]),
            (Diminished, Triad) => Interval::from_semitones(&[3, 3]),
            (Major, Seventh) => Interval::from_semitones(&[4, 3, 4]),
            (Minor, Seventh) => Interval::from_semitones(&[3, 4, 3]),
            (Augmented, Seventh) => Interval::from_semitones(&[4, 4, 2]),
            (Augmented, MajorSeventh) => Interval::from_semitones(&[4, 4, 3]),
            (Diminished, Seventh) => Interval::from_semitones(&[3, 3, 3]),
            (HalfDiminished, Seventh) => Interval::from_semitones(&[3, 3, 4]),
            (Minor, MajorSeventh) => Interval::from_semitones(&[3, 4, 4]),
            (Dominant, Seventh) => Interval::from_semitones(&[4, 3, 3]),
            (Dominant, Ninth) => Interval::from_semitones(&[4, 3, 3, 4]),
            (Major, Ninth) => Interval::from_semitones(&[4, 3, 4, 3]),
            (Dominant, Eleventh) => Interval::from_semitones(&[4, 3, 3, 4, 4]),
            (Major, Eleventh) => Interval::from_semitones(&[4, 3, 4, 3, 3]),
            (Minor, Eleventh) => Interval::from_semitones(&[3, 4, 3, 4, 3]),
            (Dominant, Thirteenth) => Interval::from_semitones(&[4, 3, 3, 4, 3, 4]),
            (Major, Thirteenth) => Interval::from_semitones(&[4, 3, 4, 3, 3, 4]),
            (Minor, Thirteenth) => Interval::from_semitones(&[3, 4, 3, 4, 3, 4]),
            _ => Interval::from_semitones(&[4, 3]),
        }
        .unwrap()
    }