Enum StreamElement 

pub enum StreamElement {
    Note(Note),
    Chord(Chord),
    Rest(Rest),
    Stream(Box<Stream>),
    KeySignature(KeySignature),
    TimeSignature(TimeSignature),
    MetronomeMark(MetronomeMark),
}

A musical object that can live on a timeline.

Variants

Note(Note)

A single pitched note.

Chord(Chord)

A chord containing one or more notes.

Rest(Rest)

A silent rest.

Stream(Box<Stream>)

A stream nested inside this one: a part in a score, a measure in a part. Boxed, since a stream holds these by value.

KeySignature(KeySignature)

The key signature in force from here on.

TimeSignature(TimeSignature)

The metre in force from here on.

MetronomeMark(MetronomeMark)

The tempo in force from here on.

Implementations

impl StreamElement

pub fn duration(&self) -> Option<&Duration>

Returns the assigned duration, if present.

The marks that only say what is in force from a point — a key, a metre, a tempo — have none, as they take no time in music21 either.

pub fn quarter_length(&self) -> FloatType

Returns the duration in quarter lengths.

A nested stream is as long as its own contents; a mark takes no time; anything else with no duration of its own defaults to a quarter, as music21’s does.

pub fn pitches(&self) -> Vec<Pitch>

Returns all pitches contained by this element, a nested stream’s included.

pub fn as_stream(&self) -> Option<&Stream>

The stream this element is, when it is one.

pub fn is_note_or_chord(&self) -> bool

Whether this element sounds — music21’s .notes, which is notes and chords but not rests.

pub fn transpose(&self, interval: &Interval) -> Result<Self>

Returns a transposed copy.

A key signature moves with the music, as music21’s does; a metre and a tempo do not depend on pitch and are left alone.

Trait Implementations

impl Clone for StreamElement

fn clone(&self) -> StreamElement

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for StreamElement

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for StreamElement

Available on crate feature serde only.

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl From<Chord> for StreamElement

fn from(value: Chord) -> Self

Converts to this type from the input type.

impl From<KeySignature> for StreamElement

fn from(value: KeySignature) -> Self

Converts to this type from the input type.

impl From<MetronomeMark> for StreamElement

fn from(value: MetronomeMark) -> Self

Converts to this type from the input type.

impl From<Note> for StreamElement

fn from(value: Note) -> Self

Converts to this type from the input type.

impl From<Rest> for StreamElement

fn from(value: Rest) -> Self

Converts to this type from the input type.

impl From<Stream> for StreamElement

fn from(value: Stream) -> Self

Converts to this type from the input type.

impl From<TimeSignature> for StreamElement

fn from(value: TimeSignature) -> Self

Converts to this type from the input type.

impl Serialize for StreamElement

Available on crate feature serde only.

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.