Struct cretonne_codegen::ir::jumptable::JumpTableData

pub struct JumpTableData { /* fields omitted */ }

Contents of a jump table.

All jump tables use 0-based indexing and are expected to be densely populated. They don't need to be completely populated, though. Individual entries can be missing.

Methods

impl JumpTableData

pub fn new() -> Self

Create a new empty jump table.

pub fn with_capacity(capacity: usize) -> Self

Create a new empty jump table with the specified capacity.

pub fn len(&self) -> usize

Get the number of table entries.

pub fn set_entry(&mut self, idx: usize, dest: Ebb)

Set a table entry.

The table will grow as needed to fit idx.

pub fn push_entry(&mut self, dest: Ebb)

Append a table entry.

pub fn clear_entry(&mut self, idx: usize)

Clear a table entry.

The br_table instruction will fall through if given an index corresponding to a cleared table entry.

pub fn get_entry(&self, idx: usize) -> Option<Ebb>

Get the entry for idx, or None.

Important traits for Entries<'a>

impl<'a> Iterator for Entries<'a> type Item = (usize, Ebb);

pub fn entries(&self) -> Entries

Enumerate over all (idx, dest) pairs in the table in order.

This returns an iterator that skips any empty slots in the table.

pub fn branches_to(&self, ebb: Ebb) -> bool

Checks if any of the entries branch to ebb.

Important traits for &'a [u8]

impl<'a> Read for &'a [u8]impl<'a> Write for &'a mut [u8]

pub fn as_mut_slice(&mut self) -> &mut [PackedOption<Ebb>]

Access the whole table as a mutable slice.

Trait Implementations

impl Clone for JumpTableData

fn clone(&self) -> JumpTableData

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Display for JumpTableData

fn fmt(&self, fmt: &mut Formatter) -> Result

Formats the value using the given formatter.