Struct PackedIndex

pub struct PackedIndex(/* private fields */);

A packed representation of a type index.

This type is morally an enum of either:

1. An index into a Wasm module’s type space.

2. A CoreTypeId identifier.

3. An index into a recursion group’s elements.

The latter two variants are canonical while the first is not. Reading raw types will produce (1), while working with types after validation will produce (2) and (3).

Implementations

impl PackedIndex

pub fn from_module_index(index: u32) -> Option<PackedIndex>

Construct a PackedIndex from an index into a module’s types space.

pub fn from_rec_group_index(index: u32) -> Option<PackedIndex>

Construct a PackedIndex from an index into the index’s containing recursion group.

pub fn from_id(id: CoreTypeId) -> Option<PackedIndex>

Construct a PackedIndex from the given CoreTypeId.

pub fn is_canonical(&self) -> bool

Is this index in canonical form?

pub fn unpack(&self) -> UnpackedIndex

Uncompress this packed index into an actual enum that can be matched on.

pub fn as_module_index(&self) -> Option<u32>

Get the underlying index into a module’s types space, if any.

pub fn as_rec_group_index(&self) -> Option<u32>

Get the underlying index into the containing recursion group, if any.

pub fn as_core_type_id(&self) -> Option<CoreTypeId>

Get the underlying CoreTypeId, if any.

Trait Implementations

impl Clone for PackedIndex

fn clone(&self) -> PackedIndex

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for PackedIndex

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

Formats the value using the given formatter.

impl Display for PackedIndex

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

Formats the value using the given formatter.

impl Hash for PackedIndex

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 PackedIndex

fn cmp(&self, other: &PackedIndex) -> 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 PackedIndex

fn eq(&self, other: &PackedIndex) -> 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 PackedIndex

fn partial_cmp(&self, other: &PackedIndex) -> 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 PackedIndex

impl Eq for PackedIndex

impl StructuralPartialEq for PackedIndex