Struct ExprFingerprint 

pub struct ExprFingerprint { /* private fields */ }

A compact fingerprint of a TLExpr structure (not values).

Two expressions with identical structure produce the same fingerprint. Used as a content-addressable cache key in LruCompilationCache and CachingCompiler.

The fingerprint is derived from the Debug representation of the expression, which is deterministic for the same expression tree.

Implementations

impl ExprFingerprint

pub fn compute(expr_repr: &str) -> Self

Compute a fingerprint from an arbitrary string representation.

In practice this is called with format!("{:?}", expr) so that the fingerprint captures the full recursive structure of the expression.

Trait Implementations

impl Clone for ExprFingerprint

fn clone(&self) -> ExprFingerprint

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ExprFingerprint

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

Formats the value using the given formatter.

impl Display for ExprFingerprint

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

Formats the value using the given formatter.

impl Hash for ExprFingerprint

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 ExprFingerprint

fn eq(&self, other: &ExprFingerprint) -> 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 Eq for ExprFingerprint

impl StructuralPartialEq for ExprFingerprint