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use anyhow::Result;
use crate::algorithms::{FinalTr, MapFinalAction, TrMapper, WeightConverter};
use crate::fst_properties::FstProperties;
use crate::semirings::Semiring;
use crate::Tr;
use crate::EPS_LABEL;
pub struct InputEpsilonMapper {}
impl<S: Semiring> TrMapper<S> for InputEpsilonMapper {
fn tr_map(&self, tr: &mut Tr<S>) -> Result<()> {
tr.ilabel = EPS_LABEL;
Ok(())
}
fn final_tr_map(&self, _final_tr: &mut FinalTr<S>) -> Result<()> {
Ok(())
}
fn final_action(&self) -> MapFinalAction {
MapFinalAction::MapNoSuperfinal
}
fn properties(&self, inprops: FstProperties) -> FstProperties {
(inprops & FstProperties::set_arc_properties())
| FstProperties::I_EPSILONS
| FstProperties::I_LABEL_SORTED
}
}
tr_mapper_to_weight_convert_mapper!(InputEpsilonMapper);