Enum InstError 

#[non_exhaustive]
pub enum InstError {
    UnknownOpcode(u8),
    InvalidOperand {
        opcode: Opcode,
        field: &'static str,
    },
    NonCanonical(Opcode),
}

Why eight bytes are not an instruction.

Examples

use bytecode_lang::{Inst, InstError, Opcode};

assert_eq!(Inst::from_bytes([0xff, 0, 0, 0, 0, 0, 0, 0]), Err(InstError::UnknownOpcode(0xff)));
// `nop` with a non-zero unused byte has two encodings otherwise, so it is refused.
assert_eq!(Inst::from_bytes([0x00, 1, 0, 0, 0, 0, 0, 0]), Err(InstError::NonCanonical(Opcode::Nop)));

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

UnknownOpcode(u8)

The opcode byte names no instruction.

InvalidOperand

A modifier field holds a value its type does not define (for example an integer type code above 7, or a boolean above 1).

Fields

opcode: Opcode

The instruction.

field: &'static str

The field’s name.

NonCanonical(Opcode)

A byte the instruction does not use is not zero.

Trait Implementations

impl Clone for InstError

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for InstError

impl Debug for InstError

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

Formats the value using the given formatter.

impl Display for InstError

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

Formats the value using the given formatter.

impl Eq for InstError

impl Error for InstError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

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

Provides type-based access to context intended for error reports.

impl PartialEq for InstError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for InstError