Struct Opcode

pub struct Opcode { /* private fields */ }

A script Opcode.

We do not implement Ord on this type because there is no natural ordering on opcodes, but there may appear to be one (e.g. because all the push opcodes appear in a consecutive block) and we don’t want to encourage subtly buggy code. Please use Opcode::classify to distinguish different types of opcodes.

Example of Core bug caused by assuming ordering

Bitcoin Core’s IsPushOnly considers OP_RESERVED to be a “push code”, allowing this opcode in contexts where only pushes are supposed to be allowed.

Implementations

impl Opcode

pub fn classify(self, ctx: ClassifyContext) -> Class

Classifies an Opcode into a broad class.

pub const fn to_u8(self) -> u8

Encodes Opcode as a byte.

Trait Implementations

impl Clone for Opcode

fn clone(&self) -> Opcode

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Opcode

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

Formats the value using the given formatter.

impl Display for Opcode

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

Formats the value using the given formatter.

impl From<WitnessVersion> for Opcode

fn from(version: WitnessVersion) -> Opcode

Converts to this type from the input type.

impl From<u8> for Opcode

fn from(b: u8) -> Opcode

Converts to this type from the input type.

impl PartialEq for Opcode

fn eq(&self, other: &Opcode) -> 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 Serialize for Opcode

fn serialize<S>( &self, serializer: S, ) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl TryFrom<Opcode> for WitnessVersion

type Error = TryFromError

The type returned in the event of a conversion error.

fn try_from( opcode: Opcode, ) -> Result<WitnessVersion, <WitnessVersion as TryFrom<Opcode>>::Error>

Performs the conversion.

impl Copy for Opcode

impl Eq for Opcode

impl StructuralPartialEq for Opcode