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use crate::{Domain, DomainType, IntoVal, LVar, ResolvedState, Val};
use std::fmt::Debug;
pub trait ReifyIn<'a, D>: Sized {
type Reified;
fn reify_in(&self, state: &ResolvedState<D>) -> Option<Self::Reified>;
}
impl<'a, T, D> ReifyIn<'a, D> for LVar<T>
where
T: ReifyIn<'a, D> + Debug,
D: DomainType<'a, T> + 'a,
{
type Reified = T::Reified;
fn reify_in(&self, state: &ResolvedState<D>) -> Option<Self::Reified> {
self.into_val().reify_in(state)
}
}
impl<'a, T, D> ReifyIn<'a, D> for Val<T>
where
T: ReifyIn<'a, D> + Debug,
D: DomainType<'a, T> + 'a,
{
type Reified = T::Reified;
fn reify_in(&self, state: &ResolvedState<D>) -> Option<Self::Reified> {
let resolved = state.resolve_val(self).resolved().ok()?;
resolved.reify_in(state)
}
}
impl<'a, T, D> ReifyIn<'a, D> for &T
where
T: ReifyIn<'a, D>,
D: Domain<'a> + 'a,
{
type Reified = T::Reified;
fn reify_in(&self, state: &ResolvedState<D>) -> Option<Self::Reified> {
(*self).reify_in(state)
}
}
#[cfg(test)]
mod tests {
use crate::example::I32;
use crate::{val, var, IterResolved, ReifyIn, ResolvedState, State, Val};
#[test]
fn reify_var() {
let x: Val<i32> = val!(var());
State::new()
.iter_resolved()
.for_each(|state: ResolvedState<I32>| {
assert_eq!(x.reify_in(&state), None);
});
}
#[test]
fn reify_resolved() {
let x = val!(1);
State::new()
.iter_resolved()
.for_each(|state: ResolvedState<I32>| {
assert_eq!(x.reify_in(&state), Some(1));
});
}
}