Trait gluon_check::unify::Unifiable
[−]
[src]
pub trait Unifiable<S>: Substitutable + Sized { type Error; fn zip_match<U>(
&self,
other: &Self,
unifier: &mut UnifierState<S, U>
) -> Result<Option<Self>, Error<Self, Self::Error>>
where
U: Unifier<S, Self>; }
A type which can be unified by checking for equivalence between the top level of
two instances of the type and then recursively calling into the unifier on all sub-terms
Associated Types
type Error
Required Methods
fn zip_match<U>(
&self,
other: &Self,
unifier: &mut UnifierState<S, U>
) -> Result<Option<Self>, Error<Self, Self::Error>> where
U: Unifier<S, Self>,
&self,
other: &Self,
unifier: &mut UnifierState<S, U>
) -> Result<Option<Self>, Error<Self, Self::Error>> where
U: Unifier<S, Self>,
Perform one level of equality testing between self and other and recursively call
back into the unifier for unification on any sub-terms.
Returns Ok if the the immediate level of self and other were equal and optionally
returns a more specific type (if None is returned self should be chosen as the type if
that becomes necessary).
Returns Err if the immediate level were not equal.