Struct Interner 

pub struct Interner { /* private fields */ }

String interner. Deduplicates strings and returns cheap Symbol handles.

Implementations

impl Interner

pub fn new() -> Interner

pub fn intern(&mut self, s: &str) -> Symbol

Intern a string, returning its Symbol. If the string was already interned, returns the existing Symbol.

pub fn intern_owned(&mut self, s: String) -> Symbol

Intern an owned string, avoiding clone if not already present.

pub fn resolve(&self, sym: Symbol) -> &str

Resolve a Symbol back to its string.

Panics

Panics if the symbol was not created by this interner.

pub fn try_resolve(&self, sym: Symbol) -> Option<&str>

Try to resolve a Symbol, returning None if invalid.

pub fn len(&self) -> usize

Number of interned strings.

pub fn is_empty(&self) -> bool

Whether the interner is empty.

pub fn iter(&self) -> impl Iterator<Item = (Symbol, &str)>

Iterate over all interned strings with their symbols.

pub fn to_blob(&self) -> (Vec<u8>, Vec<u32>)

Emit as binary format blob and offset table.

Returns (concatenated UTF-8 bytes, offset for each string + sentinel). The offsets array has len() + 1 entries; the last is the total blob size.

Trait Implementations

impl Clone for Interner

fn clone(&self) -> Interner

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Interner

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

Formats the value using the given formatter.

impl Default for Interner

fn default() -> Interner

Returns the “default value” for a type.