Struct ExprArenaSnapshot 

pub struct ExprArenaSnapshot<'a> { /* private fields */ }

Immutable copy-on-write snapshot of an ExprArenaCell.

Methods from Deref<Target = ExprArena>

pub fn len(&self) -> usize

pub fn is_empty(&self) -> bool

pub fn get(&self, id: ExprId) -> &ExprNode

pub fn nodes(&self) -> &[ExprNode]

pub fn num_params(&self) -> usize

pub fn param_value(&self, p: ParamId) -> f64

Current value bound to parameter p.

Panics

Panics if p was not allocated by Self::new_param on this arena.

pub fn try_param_value(&self, p: ParamId) -> Option<f64>

Look up the value of p, returning None if p is out of range.

Trait Implementations

impl Debug for ExprArenaSnapshot<'_>

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

Formats the value using the given formatter.

impl Deref for ExprArenaSnapshot<'_>

type Target = ExprArena

The resulting type after dereferencing.

fn deref(&self) -> &<ExprArenaSnapshot<'_> as Deref>::Target

Dereferences the value.