Enum ValueSegment 

#[repr(u8)]
pub enum ValueSegment {
    Constant = 0,
    InOut = 1,
    Private = 2,
    Scratch = 3,
}

The section of the ValueVec a ValueIndex names.

The sections partition every word a circuit allocates. The first three hold the values a ConstraintSystem may reference; Self::Scratch holds the uncommitted temporaries that only exist while a circuit is evaluated.

The discriminants are the two-bit tag ValueIndex packs, and their order is the order the sections occupy in the value vector.

Variants

Constant = 0

The constants the circuit declares, known to both prover and verifier.

InOut = 1

The input/output values, which are public but chosen per instance.

Private = 2

The values only the prover knows: the declared witness and the values the gates create.

Scratch = 3

The uncommitted temporaries, live only while a circuit is evaluated.

These words are not committed and no constraint may reference them, so a ValueIndex in this segment is meaningful only in the circuit’s wire mapping and its evaluation form. ConstraintSystem::validate rejects any operand term that names it.

Implementations

impl ValueSegment

pub const ALL: [ValueSegment; 4]

The four segments, in value-vector order.

pub const fn is_referenceable(self) -> bool

Whether a ConstraintSystem operand may reference this segment.

Trait Implementations

impl Clone for ValueSegment

fn clone(&self) -> ValueSegment

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ValueSegment

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

Formats the value using the given formatter.

impl Hash for ValueSegment

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 ValueSegment

fn cmp(&self, other: &ValueSegment) -> 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.

impl PartialEq for ValueSegment

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for ValueSegment

fn partial_cmp(&self, other: &ValueSegment) -> 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 Copy for ValueSegment

impl Eq for ValueSegment

impl StructuralPartialEq for ValueSegment