Enum essential_constraint_vm::asm::Pred

pub enum Pred {
    Eq,
    EqRange,
    Gt,
    Lt,
    Gte,
    Lte,
    And,
    Or,
    Not,
}

Operations for computing predicates.

Variants

Eq

0x10

Check equality of two words.

Stack Input

[lhs, rhs]

Stack Output

[lhs == rhs]

EqRange

0x11

Check equality of two ranges on the stack.

The ranges must be of equal length. The ranges must be stacked sequentially. Here N is len -1.

Stack Input

[arr_a_0, ..arr_a_N, arr_b_0, ..arr_b_N, len]

Stack Output

[(top-(2*len))..(top - len) == (top - len)..top]

Gt

0x12

Check if left-hand side is greater than right-hand side.

Stack Input

[lhs, rhs]

Stack Output

[lhs > rhs]

Lt

0x13

Check if left-hand side is less than right-hand side.

Stack Input

[lhs, rhs]

Stack Output

[lhs < rhs]

Gte

0x14

Check if left-hand side is greater than or equal to right-hand side.

Stack Input

[lhs, rhs]

Stack Output

[lhs >= rhs]

Lte

0x15

Check if left-hand side is less than or equal to right-hand side.

Stack Input

[lhs, rhs]

Stack Output

[lhs <= rhs]

And

0x16

Logical AND of two words.

Stack Input

[lhs, rhs]

Stack Output

[lhs && rhs]

Or

0x17

Logical OR of two words.

Stack Input

[lhs, rhs]

Stack Output

[lhs || rhs]

Not

0x18

Logical NOT of a word.

Stack Input

[a]

Stack Output

[!a]

Trait Implementations

impl Clone for Pred

fn clone(&self) -> Pred

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Pred

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

Formats the value using the given formatter.

impl From<Pred> for Constraint

fn from(subgroup: Pred) -> Constraint

Converts to this type from the input type.

impl Hash for Pred

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

where __H: Hasher,

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 Pred

fn cmp(&self, other: &Pred) -> 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 + PartialOrd,

Restrict a value to a certain interval.

impl PartialEq for Pred

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

This method tests for self and other values to be equal, and is used by ==.

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

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

impl PartialOrd for Pred

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

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

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

This method tests less than (for self and other) and is used by the < operator.

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

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

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

This method tests greater than (for self and other) and is used by the > operator.

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

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

impl ToBytes for Pred

type Bytes = Pred

The iterator yielding bytes.

fn to_bytes(&self) -> <Pred as ToBytes>::Bytes

Convert the operation to its serialized form in bytes.

impl ToOpcode for Pred

type Opcode = Pred

The associated Opcode type.

fn to_opcode(&self) -> <Pred as ToOpcode>::Opcode

The opcode associated with this operation.

impl TryFromBytes for Pred

type Error = FromBytesError

Represents any error that might occur while parsing an op from bytes.

fn try_from_bytes( bytes: &mut impl Iterator<Item = u8>, ) -> Option<Result<Pred, <Pred as TryFromBytes>::Error>>

Parse a single operation from the given iterator yielding bytes.

impl Copy for Pred

impl Eq for Pred

impl StructuralPartialEq for Pred