Struct EnvironmentCache 

pub struct EnvironmentCache<T, V>
where
    T: TensorLike,
    V: Clone + Hash + Eq,
{ /* private fields */ }

Simple environment cache for tensor network computations.

This struct handles:

• Storing computed environment tensors
• Cache invalidation when tensors are updated

The actual contraction logic is implemented in ProjectedOperator/ProjectedState.

Implementations

impl<T, V> EnvironmentCache<T, V>

where T: TensorLike, V: Clone + Hash + Eq + Send + Sync + Debug,

pub fn new() -> Self

Create a new empty environment cache.

pub fn get(&self, from: &V, to: &V) -> Option<&T>

Get a cached environment tensor if it exists.

pub fn insert(&mut self, from: V, to: V, env: T)

Insert an environment tensor.

pub fn contains(&self, from: &V, to: &V) -> bool

Check if environment exists for edge (from, to).

pub fn len(&self) -> usize

Get the number of cached environments.

pub fn is_empty(&self) -> bool

Check if the cache is empty.

pub fn clear(&mut self)

Clear all cached environments.

pub fn invalidate<'a, NT: NetworkTopology<V>>( &mut self, region: impl IntoIterator<Item = &'a V>, topology: &NT, )

where V: 'a,

Invalidate all caches affected by updates to tensors in region.

For each t ∈ region:

1. Remove all env[(t, *)] (0th generation)
2. Recursively remove caches propagating towards leaves

Trait Implementations

impl<T, V> Clone for EnvironmentCache<T, V>

where T: TensorLike + Clone, V: Clone + Hash + Eq + Clone,

fn clone(&self) -> EnvironmentCache<T, V>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T, V> Debug for EnvironmentCache<T, V>

where T: TensorLike + Debug, V: Clone + Hash + Eq + Debug,

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

Formats the value using the given formatter.

impl<T, V> Default for EnvironmentCache<T, V>

where T: TensorLike, V: Clone + Hash + Eq + Send + Sync + Debug,

fn default() -> Self

Returns the “default value” for a type.