Struct KeySignature 

pub struct KeySignature {
    pub fifths: i8,
    pub mode: String,
}

Fields

fifths: i8

-7 (7 flats) to +7 (7 sharps), 0 = C major / A minor.

mode: String

“major” or “minor”

Implementations

impl KeySignature

pub fn alter_for_step(&self, step: &Step) -> i8

Accidental alter (-1, 0, or +1) applied to step in this key signature.

pub fn contains_pitch(&self, pitch: &Pitch) -> bool

True if pitch is diatonic to this key (octave-independent, checks step + alter).

pub fn tonic(&self) -> (Step, i8)

Tonic step and alter for this key.

Examples: G major → (Step::G, 0), Bb major → (Step::B, -1), F# minor → (Step::F, 1).

pub fn display_name(&self) -> String

Human-readable key name: "C major", "G major", "F# minor", "Bb major" etc.

Trait Implementations

impl Clone for KeySignature

fn clone(&self) -> KeySignature

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for KeySignature

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

Formats the value using the given formatter.

impl Default for KeySignature

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for KeySignature

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for KeySignature

fn eq(&self, other: &KeySignature) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for KeySignature

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for KeySignature