Struct LazyFst 

pub struct LazyFst<W: Semiring, Op: FstOp<W>, Cache> { /* private fields */ }

Implementations

impl<W, Op, Cache> LazyFst<W, Op, Cache>

where W: Semiring, Op: FstOp<W>, Cache: FstCache<W>,

pub fn from_op_and_cache( op: Op, cache: Cache, isymt: Option<Arc<SymbolTable>>, osymt: Option<Arc<SymbolTable>>, ) -> Self

pub fn compute<F2: MutableFst<W> + AllocableFst<W>>(&self) -> Result<F2>

Turns the Lazy FST into a static one.

Trait Implementations

impl<W: Clone + Semiring, Op: Clone + FstOp<W>, Cache: Clone> Clone for LazyFst<W, Op, Cache>

fn clone(&self) -> LazyFst<W, Op, Cache>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<W: Semiring, Op: FstOp<W>, Cache: FstCache<W>> CoreFst<W> for LazyFst<W, Op, Cache>

type TRS = TrsVec<W>

Weight use in the wFST. This type must implement the Semiring trait.

fn start(&self) -> Option<StateId>

Returns the ID of the start state of the wFST if it exists else none.

fn final_weight(&self, state_id: StateId) -> Result<Option<W>>

Retrieves the final weight of a state (if the state is a final one).

unsafe fn final_weight_unchecked(&self, state_id: StateId) -> Option<W>

Retrieves the final weight of a state (if the state is a final one).

fn num_trs(&self, s: StateId) -> Result<usize>

Number of trs leaving a specific state in the wFST.

unsafe fn num_trs_unchecked(&self, s: StateId) -> usize

Number of trs leaving a specific state in the wFST.

fn get_trs(&self, state_id: StateId) -> Result<Self::TRS>

Get an iterator on the transitions leaving state state.

unsafe fn get_trs_unchecked(&self, state_id: StateId) -> Self::TRS

Get an iterator on the transitions leaving state state.

fn properties(&self) -> FstProperties

Retrieve the FstProperties stored in the Fst. As a result, all the properties returned are verified by the Fst but some other properties might be true as well despite the flag not being set.

fn num_input_epsilons(&self, state: StateId) -> Result<usize>

Returns the number of trs with epsilon input labels leaving a state.

fn num_output_epsilons(&self, state: StateId) -> Result<usize>

Returns the number of trs with epsilon output labels leaving a state.

fn is_final(&self, state_id: StateId) -> Result<bool>

Returns whether or not the state with identifier passed as parameters is a final state.

unsafe fn is_final_unchecked(&self, state: StateId) -> bool

Returns whether or not the state with identifier passed as parameters is a final state.

fn is_start(&self, state_id: StateId) -> bool

Check whether a state is the start state or not.

fn properties_with_mask(&self, mask: FstProperties) -> FstProperties

Apply a mask to the FstProperties returned.

fn properties_check(&self, props_known: FstProperties) -> Result<FstProperties>

Retrieve the FstProperties in the Fst and check that all the properties in props_known are known (not the same as true). If not an error is returned.

impl<W: Debug + Semiring, Op: Debug + FstOp<W>, Cache: Debug> Debug for LazyFst<W, Op, Cache>

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

Formats the value using the given formatter.

impl<W, Op, Cache> Fst<W> for LazyFst<W, Op, Cache>

where W: Semiring, Op: FstOp<W> + 'static, Cache: FstCache<W> + 'static,

fn input_symbols(&self) -> Option<&Arc<SymbolTable>>

Retrieves the input SymbolTable associated to the Fst. If no SymbolTable has been previously attached then None is returned.

fn output_symbols(&self) -> Option<&Arc<SymbolTable>>

Retrieves the output SymbolTable associated to the Fst. If no SymbolTable has been previously attached then None is returned.

fn set_input_symbols(&mut self, symt: Arc<SymbolTable>)

Attaches an output SymbolTable to the Fst. The SymbolTable is not duplicated with the use of Arc.

fn set_output_symbols(&mut self, symt: Arc<SymbolTable>)

Attaches an output SymbolTable to the Fst. The SymbolTable is not duplicated with the use of Arc.

fn take_input_symbols(&mut self) -> Option<Arc<SymbolTable>>

Removes the input symbol table from the Fst and retrieves it.

fn take_output_symbols(&mut self) -> Option<Arc<SymbolTable>>

Removes the output symbol table from the Fst and retrieves it.

fn final_states_iter(&self) -> FinalStatesIterator<'_, W, Self>

where Self: Sized,

Returns an Iterator on the final states along with their weight.

fn paths_iter(&self) -> PathsIterator<'_, W, Self>

where Self: Sized,

Returns an Iterator on the paths accepted by the Fst.

fn string_paths_iter(&self) -> Result<StringPathsIterator<'_, W, Self>>

where Self: Sized,

Returns an Iterator on the paths accepted by the Fst. Plus, handles the SymbolTable allowing to retrieve the strings instead of only the sequence of labels.

impl<'a, W, Op, Cache> FstIterator<'a, W> for LazyFst<W, Op, Cache>

where W: Semiring, Op: FstOp<W> + 'a, Cache: FstCache<W> + 'a,

type FstIter = Map<Zip<<LazyFst<W, Op, Cache> as StateIterator<'a>>::Iter, Repeat<&'a LazyFst<W, Op, Cache>>>, Box<dyn FnMut((u32, &'a LazyFst<W, Op, Cache>)) -> FstIterData<W, <LazyFst<W, Op, Cache> as CoreFst<W>>::TRS>>>

fn fst_iter(&'a self) -> Self::FstIter

impl<W, Op, Cache> SerializableLazyFst for LazyFst<W, Op, Cache>

where W: SerializableSemiring, Op: FstOp<W> + AccessibleOpState, Op::FstOpState: SerializableOpState, Cache: FstCache<W> + SerializableCache,

fn write<P: AsRef<Path>>(&self, cache_dir: P, op_state_dir: P) -> Result<()>

Writes LazyFst interal states to a directory of files in binary format.

impl<'a, W, Op, Cache> StateIterator<'a> for LazyFst<W, Op, Cache>

where W: Semiring, Op: FstOp<W> + 'a, Cache: FstCache<W> + 'a,

type Iter = StatesIteratorLazyFst<'a, LazyFst<W, Op, Cache>>

Iterator used to iterate over the state_id of the states of an FST.

fn states_iter(&'a self) -> Self::Iter

Creates an iterator over the state_id of the states of an FST.