Struct JumpTable

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

An opaque reference to a jump table.

JumpTables are used for indirect branching and are specialized for dense, 0-based jump offsets. If you want a jump table which doesn’t start at 0, or is not contiguous, consider using a Switch instead.

JumpTable are used with br_table.

JumpTables can be created with create_jump_table.

While the order is stable, it is arbitrary.

Implementations

impl JumpTable

pub fn from_u32(x: u32) -> Self

Create a new instance from a u32.

pub fn as_u32(self) -> u32

Return the underlying index value as a u32.

pub fn as_bits(self) -> u32

Return the raw bit encoding for this instance.

Warning: the raw bit encoding is opaque and has no guaranteed correspondence to the entity’s index. It encodes the entire state of this index value: either a valid index or an invalid-index sentinel. The value returned by this method should only be passed to from_bits.

pub fn from_bits(x: u32) -> Self

Create a new instance from the raw bit encoding.

Warning: the raw bit encoding is opaque and has no guaranteed correspondence to the entity’s index. It encodes the entire state of this index value: either a valid index or an invalid-index sentinel. The value returned by this method should only be given bits from as_bits.

impl JumpTable

pub fn with_number(n: u32) -> Option<Self>

Create a new jump table reference from its number.

This method is for use by the parser.

Trait Implementations

impl Clone for JumpTable

fn clone(&self) -> JumpTable

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for JumpTable

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

Formats the value using the given formatter.

impl Display for JumpTable

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

Formats the value using the given formatter.

impl EntityRef for JumpTable

fn new(index: usize) -> Self

Create a new entity reference from a small integer. This should crash if the requested index is not representable.

fn index(self) -> usize

Get the index that was used to create this entity reference.

impl From<JumpTable> for AnyEntity

fn from(r: JumpTable) -> Self

Converts to this type from the input type.

impl Hash for JumpTable

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

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 JumpTable

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

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

fn partial_cmp(&self, other: &JumpTable) -> 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 ReservedValue for JumpTable

fn reserved_value() -> JumpTable

Create an instance of the reserved value.

fn is_reserved_value(&self) -> bool

Checks whether value is the reserved one.

impl Copy for JumpTable

impl Eq for JumpTable

impl StructuralPartialEq for JumpTable