Trait gluon_check::unify::Unifier

pub trait Unifier<S, Type> where
    Type: Unifiable<S>, {
    fn report_error(&mut self, error: Error<Type::Error, Type>);
    fn try_match_res(
        &mut self, 
        l: &Type, 
        r: &Type
    ) -> Result<Option<Type>, Error<Type::Error, Type>>;
    fn error_type(&self) -> Type;

    fn try_match(&mut self, l: &Type, r: &Type) -> Option<Type> { ... }
    fn allow_returned_type_replacement(&self) -> bool { ... }
}

A Unifier is a type which implements a unifying strategy between two values.

Required methods

fn report_error(&mut self, error: Error<Type::Error, Type>)

Reports an error to the unifier for cases when returning the error is not possible.

fn try_match_res(
    &mut self,
    l: &Type,
    r: &Type
) -> Result<Option<Type>, Error<Type::Error, Type>>

fn error_type(&self) -> Type

Loading content...

Provided methods

fn try_match(&mut self, l: &Type, r: &Type) -> Option<Type>

Attempt to unify l and r using the strategy of Self.

fn allow_returned_type_replacement(&self) -> bool

true if the returned type can be replaced by the caller

Loading content...

Implementors

impl<'a, '_, '_> Unifier<State<'a>, ArcType<Symbol>> for gluon_check::unify_type::UnifierState<'a, Instantiation<'_, '_>>

fn report_error(
    &mut self,
    _error: UnifyError<TypeError<Symbol, RcType>, RcType>
)

fn try_match_res(
    &mut self,
    l: &RcType,
    r: &RcType
) -> Result<Option<RcType>, UnifyError<TypeError<Symbol, RcType>, RcType>>

fn error_type(&self) -> RcType

impl<'a, 'e> Unifier<State<'a>, ArcType<Symbol>> for gluon_check::unify_type::UnifierState<'a, Equal<'e>>

fn report_error(&mut self, error: UnifyError<TypeError<Symbol, RcType>, RcType>)

fn try_match_res(
    &mut self,
    l: &RcType,
    r: &RcType
) -> Result<Option<RcType>, UnifyError<TypeError<Symbol, RcType>, RcType>>

fn error_type(&self) -> RcType

impl<'a, 'e> Unifier<State<'a>, ArcType<Symbol>> for gluon_check::unify_type::UnifierState<'a, Smaller>

fn report_error(&mut self, error: UnifyError<TypeError<Symbol, RcType>, RcType>)

fn try_match_res(
    &mut self,
    l: &RcType,
    r: &RcType
) -> Result<Option<RcType>, UnifyError<TypeError<Symbol, RcType>, RcType>>

fn error_type(&self) -> RcType

impl<'a, 'e> Unifier<State<'a>, ArcType<Symbol>> for gluon_check::unify_type::UnifierState<'a, Subsume<'e>>

fn report_error(&mut self, error: UnifyError<TypeError<Symbol, RcType>, RcType>)

fn allow_returned_type_replacement(&self) -> bool

fn try_match_res(
    &mut self,
    l: &RcType,
    r: &RcType
) -> Result<Option<RcType>, UnifyError<TypeError<Symbol, RcType>, RcType>>

fn error_type(&self) -> RcType

impl<'e, S, T> Unifier<S, T> for gluon_check::unify::UnifierState<S, Unify<'e, T, T::Error>> where
    T: Unifiable<S> + PartialEq + Clone + Display + 'e,
    T::Variable: Clone,
    T::Factory: Clone, 

fn report_error(&mut self, error: Error<T::Error, T>)

fn try_match_res(
    &mut self,
    l_orig: &T,
    r_orig: &T
) -> Result<Option<T>, Error<T::Error, T>>

fn error_type(&self) -> T

Loading content...