Enum Half 

pub enum Half {
    Unused,
    Function,
    Str,
    Layout,
    Table,
    Args,
    Builtin,
    HostOp,
    Count,
    Case,
    Offset,
}

What one 32-bit half of a payload holds.

Every id keeps its full 32 bits: ADR 0041 narrows slot operands and nothing else.

Variants

Unused

Unused, and must be zero.

Function

Str

Layout

Table

Args

Builtin

HostOp

Count

An element count: Len::Count’s n.

Case

An enum’s case index: crate::CaseId’s number.

It is not bounds-checked here, for Half::Count’s reason: which numbers are cases is a fact about the layout the same instruction names, so crate::bytecode::verify’s semantic pass checks it against that layout rather than against a table of its own.

Offset

A word offset into an object or into the value an address names.

Implementations

impl Half

pub fn name(self) -> &'static str

What a fault calls this, and what a table it indexes is called.

Trait Implementations

impl Clone for Half

fn clone(&self) -> Half

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Half

impl Debug for Half

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

Formats the value using the given formatter.

impl Eq for Half

impl PartialEq for Half

fn eq(&self, other: &Half) -> 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 StructuralPartialEq for Half