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use crate::{Operator, TickValue, Tickable};
#[cfg(feature = "std")]
pub use facet_map::{facet_map_t, FacetMap};
#[derive(Debug, Clone, Copy)]
pub struct Facet<I, P1, P2>(
pub(super) P1,
pub(super) P2,
pub(super) core::marker::PhantomData<fn() -> I>,
);
pub fn facet_t<I, P1, P2>(op1: P1, op2: P2) -> Facet<I, P1, P2> {
Facet(op1, op2, core::marker::PhantomData::default())
}
impl<I: Tickable + Clone, P1, P2> Operator<I> for Facet<I, P1, P2>
where
P1: Operator<I>,
P2: Operator<I>,
P1::Output: Tickable,
P2::Output: Tickable,
{
type Output = TickValue<(
<P1::Output as Tickable>::Value,
<P2::Output as Tickable>::Value,
)>;
fn next(&mut self, input: I) -> Self::Output {
let tick = *input.tick();
let o1 = self.0.next(input.clone()).into_tick_value().value;
let o2 = self.1.next(input).into_tick_value().value;
TickValue {
tick,
value: (o1, o2),
}
}
}
#[cfg(feature = "std")]
mod facet_map {
use crate::{Operator, TickValue, Tickable};
use std::collections::HashMap;
use std::hash::Hash;
#[derive(Debug, Clone)]
pub struct FacetMap<I, Q, P>(HashMap<Q, P>, core::marker::PhantomData<fn() -> I>);
impl<I, Q, P> Operator<I> for FacetMap<I, Q, P>
where
I: Tickable + Clone,
Q: Eq + Hash + Clone,
P: Operator<I>,
P::Output: Tickable,
{
type Output = TickValue<HashMap<Q, <P::Output as Tickable>::Value>>;
fn next(&mut self, input: I) -> Self::Output {
let tick = *input.tick();
let value = self
.0
.iter_mut()
.map(|(k, p)| {
let o = p.next(input.clone()).into_tick_value().value;
(k.clone(), o)
})
.collect();
TickValue { tick, value }
}
}
pub fn facet_map_t<I, It, Q, P>(ops: It) -> FacetMap<I, Q, P>
where
Q: Eq + Hash + Clone,
It: IntoIterator<Item = (Q, P)>,
{
FacetMap(
ops.into_iter().collect(),
core::marker::PhantomData::default(),
)
}
}