Struct Symbol 

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

A lightweight handle to an interned string.

Symbols are Copy and compare in O(1) time regardless of string length. Use Interner::resolve to retrieve the original string.

Implementations

impl Symbol

pub const EMPTY: Symbol

The empty string symbol, always at index 0.

pub fn index(self) -> usize

Returns the internal index of this symbol.

Useful for dense storage (e.g., indexing into a Vec instead of a HashMap).

pub fn from_index(i: usize) -> Symbol

Reconstructs a symbol from an internal index — the inverse of Symbol::index. Sound only for an index produced by index() on a symbol from the same interner (the bounds prover round-trips symbols through their dense indices as LinearExpr variable ids).

Trait Implementations

impl Clone for Symbol

fn clone(&self) -> Symbol

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Symbol

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

Formats the value using the given formatter.

impl Default for Symbol

fn default() -> Symbol

Returns the “default value” for a type.

impl DisplayWith for Symbol

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

fn with<'a>(&'a self, interner: &'a Interner) -> WithInterner<'a, Self>

impl Hash for Symbol

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 PartialEq for Symbol

fn eq(&self, other: &Symbol) -> 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 SymbolEq for Symbol

fn is(&self, interner: &Interner, s: &str) -> bool

Returns true if this symbol resolves to the given string.

impl Copy for Symbol

impl Eq for Symbol

impl StructuralPartialEq for Symbol