Struct Drawbar 

pub struct Drawbar { /* private fields */ }

One drawbar, in the four-bit slot the Stage models give it.

Positions are physical, 0..=8. The slot holds four bits, so decoding is total: a nibble above 8 is preserved and reported by Self::position as None rather than refused, on the same rule as crate::types::RangedU8 — the bound is the slot’s, not the instrument’s.

⚠️ The two constructors therefore disagree on purpose. Self::new takes a position and refuses 9 and above; from_bits — and so set_field, which goes through the type’s own parse — takes a nibble and accepts all sixteen, because a file holding one has to round-trip. A caller offering a bar to a player wants the former.

⚠️ On the Stage 2’s Farfisa the register is a tab, and the file stores a bit rather than a nibble, so those fields are bool and not this type.

Implementations

impl Drawbar

pub const MAX: u8 = 8

The highest position a drawbar can be pulled to.

pub fn new(position: u8) -> Result<Self, ParseError>

A bar at position, 0..=8. A higher one is refused — this takes a position, where decoding takes a nibble.

pub fn raw(&self) -> u8

The stored nibble, whatever it holds.

pub fn position(&self) -> Option<u8>

The position, or None for a nibble past the drawbar’s travel.

Trait Implementations

impl Clone for Drawbar

fn clone(&self) -> Drawbar

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Drawbar

impl Debug for Drawbar

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

Formats the value using the given formatter.

impl Default for Drawbar

fn default() -> Drawbar

Returns the “default value” for a type.

impl Display for Drawbar

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

Formats the value using the given formatter.

impl Eq for Drawbar

impl Hash for Drawbar

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for Drawbar

fn cmp(&self, other: &Drawbar) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

🔬This is a nightly-only experimental API. (clamp_to)

Restrict a value to a certain range.

impl Packed for Drawbar

const CONTROL: ControlKind

Which bar of the register this is comes from the declaration site — every bar shares this type — so #[bitbody] fills the rank in from a …_N field name.

const MAX_BITS: u32 = 4

Bits the widest value of this type occupies. Used to check statically that it fits its slot.

const DECODE_BITS: u32 = u8::BITS

Widest slot this type can decode without losing bits on re-encoding.

type Error = !

Why a bit pattern is not a valid value. Infallible when every pattern is.

fn from_bits(bits: u64) -> Result<Self, Self::Error>

Decode from the field’s bits, already shifted down to bit 0 and masked.

fn to_bits(&self) -> u64

Encode to the field’s bits, in the same shifted-down form.

impl PartialEq for Drawbar

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

Equality operator ==.

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

Inequality operator !=.

impl PartialEq<u8> for Drawbar

fn eq(&self, other: &u8) -> bool

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for Drawbar

fn partial_cmp(&self, other: &Drawbar) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for Drawbar