Struct Acyclic 

pub struct Acyclic<E>
where
    E: Evaluator,
{ /* private fields */ }

Available on crate feature std only.

An Evaluator adapter that prevents infinite evaluation from cyclic imports.

Implementations

impl<E> Acyclic<E>

where E: Evaluator,

pub fn new(evaluator: E) -> Self

Create a new Acyclic.

impl<E> Acyclic<E>

where E: Evaluator, E::Id: Eq + Hash,

pub fn evaluated(&self, id: &E::Id) -> bool

Check whether id was evaluated.

A module is marked as “evaluated” when Evaluator::eval succeeds on it.

pub fn get(&self) -> &E

Get a reference to the inner evaluator.

pub fn get_mut(&mut self) -> &mut E

Get a mutable reference to the inner evaluator.

Trait Implementations

impl<E> Clone for Acyclic<E>

where E: Evaluator + Clone, E::Id: Clone,

fn clone(&self) -> Acyclic<E>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<E> Debug for Acyclic<E>

where E: Evaluator + Debug, E::Id: Debug,

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

Formats the value using the given formatter.

impl<E> Default for Acyclic<E>

where E: Evaluator + Default,

fn default() -> Self

Returns the “default value” for a type.

impl<E> Evaluator for Acyclic<E>

where E: Evaluator, E::Id: Clone + Eq + Hash,

type Id = <E as Evaluator>::Id

Id of a module.

type Module = <E as Evaluator>::Module

The type of the module.

type Error = <E as Evaluator>::Error

Evaluation error.

fn is_empty(&self) -> bool

Check whether the evaluator has evaluated any modules.

fn next(&mut self) -> Option<Self::Id>

Get the next module in evaluation order.

fn eval( &mut self, id: Self::Id, imports: Imports<Self::Id>, module: Self::Module, ) -> Result<(), Self::Error>

Evaluate module identified by id that imports the modules specified by imports.

fn finish(self) -> Option<Self::Module>

Destruct the evaluator and get the final value.