Struct ConstantPool

pub struct ConstantPool { /* private fields */ }

Maintains the mapping between a constant handle (i.e. Constant) and its constant data (i.e. ConstantData).

Implementations

impl ConstantPool

pub fn new() -> Self

Create a new constant pool instance.

pub fn clear(&mut self)

Empty the constant pool of all data.

pub fn insert(&mut self, constant_value: ConstantData) -> Constant

Insert constant data into the pool, returning a handle for later referencing; when constant data is inserted that is a duplicate of previous constant data, the existing handle will be returned.

pub fn get(&self, constant_handle: Constant) -> &ConstantData

Retrieve the constant data given a handle.

pub fn set(&mut self, constant_handle: Constant, constant_value: ConstantData)

Link a constant handle to its value. This does not de-duplicate data but does avoid replacing any existing constant values. use set to tie a specific const42 to its value; use insert to add a value and return the next available const entity.

pub fn iter(&self) -> impl Iterator<Item = (&Constant, &ConstantData)>

Iterate over the constants in insertion order.

pub fn entries_mut(&mut self) -> impl Iterator<Item = &mut ConstantData>

Iterate over mutable entries in the constant pool in insertion order.

pub fn len(&self) -> usize

Return the number of constants in the pool.

pub fn byte_size(&self) -> usize

Return the combined size of all of the constant values in the pool.

Trait Implementations

impl Clone for ConstantPool

fn clone(&self) -> ConstantPool

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Hash for ConstantPool

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 PartialEq for ConstantPool

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