Struct chalk_engine::Answer[−][src]

pub struct Answer<I: Interner> {
    pub subst: Canonical<AnswerSubst<I>>,
    pub ambiguous: bool,
}
Expand description

An “answer” in the on-demand solver corresponds to a fully solved goal for a particular table (modulo delayed literals). It contains a substitution

Fields

subst: Canonical<AnswerSubst<I>>

Contains values for the unbound inference variables for which the table is true, along with any delayed subgoals (Which must still be proven) and region constrained (which must still be proven, but not by chalk).

ambiguous: bool

If this flag is set, then the answer could be neither proven nor disproven. This could be the size of the answer exceeded max_size or because of a negative loop (e.g., P :- not { P }).

Trait Implementations

impl<I: Clone + Interner> Clone for Answer<I>[src]

fn clone(&self) -> Answer<I>[src]

Returns a copy of the value. Read more

fn clone_from(&mut self, source: &Self)1.0.0[src]

Performs copy-assignment from source. Read more

impl<I: Debug + Interner> Debug for Answer<I>[src]

fn fmt(&self, f: &mut Formatter<'_>) -> Result[src]

Formats the value using the given formatter. Read more

Auto Trait Implementations

impl<I> RefUnwindSafe for Answer<I> where
    <I as Interner>::InternedCanonicalVarKinds: RefUnwindSafe,
    <I as Interner>::InternedConstraints: RefUnwindSafe,
    <I as Interner>::InternedGoal: RefUnwindSafe,
    <I as Interner>::InternedProgramClauses: RefUnwindSafe,
    <I as Interner>::InternedSubstitution: RefUnwindSafe, 

impl<I> Send for Answer<I> where
    <I as Interner>::InternedCanonicalVarKinds: Send,
    <I as Interner>::InternedConstraints: Send,
    <I as Interner>::InternedGoal: Send,
    <I as Interner>::InternedProgramClauses: Send,
    <I as Interner>::InternedSubstitution: Send, 

impl<I> Sync for Answer<I> where
    <I as Interner>::InternedCanonicalVarKinds: Sync,
    <I as Interner>::InternedConstraints: Sync,
    <I as Interner>::InternedGoal: Sync,
    <I as Interner>::InternedProgramClauses: Sync,
    <I as Interner>::InternedSubstitution: Sync, 

impl<I> Unpin for Answer<I> where
    <I as Interner>::InternedCanonicalVarKinds: Unpin,
    <I as Interner>::InternedConstraints: Unpin,
    <I as Interner>::InternedGoal: Unpin,
    <I as Interner>::InternedProgramClauses: Unpin,
    <I as Interner>::InternedSubstitution: Unpin, 

impl<I> UnwindSafe for Answer<I> where
    <I as Interner>::InternedCanonicalVarKinds: UnwindSafe,
    <I as Interner>::InternedConstraints: UnwindSafe,
    <I as Interner>::InternedGoal: UnwindSafe,
    <I as Interner>::InternedProgramClauses: UnwindSafe,
    <I as Interner>::InternedSubstitution: UnwindSafe, 

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized, [src]

pub fn type_id(&self) -> TypeId[src]

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T where
    T: ?Sized, [src]

pub fn borrow(&self) -> &T[src]

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T where
    T: ?Sized, [src]

pub fn borrow_mut(&mut self) -> &mut T[src]

Mutably borrows from an owned value. Read more

impl<T> Cast for T[src]

fn cast<U>(self, interner: &<U as HasInterner>::Interner) -> U where
    Self: CastTo<U>,
    U: HasInterner, [src]

Cast a value to type U using CastTo.

impl<T> From<T> for T[src]

pub fn from(t: T) -> T[src]

Performs the conversion.

impl<T> Instrument for T[src]

fn instrument(self, span: Span) -> Instrumented<Self>[src]

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

fn in_current_span(self) -> Instrumented<Self>[src]

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

impl<T, U> Into<U> for T where
    U: From<T>, [src]

pub fn into(self) -> U[src]

Performs the conversion.

impl<T> ToOwned for T where
    T: Clone, [src]

type Owned = T

The resulting type after obtaining ownership.

pub fn to_owned(&self) -> T[src]

Creates owned data from borrowed data, usually by cloning. Read more

pub fn clone_into(&self, target: &mut T)[src]

🔬 This is a nightly-only experimental API. (toowned_clone_into)

recently added

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T, U> TryFrom<U> for T where
    U: Into<T>, [src]

type Error = Infallible

The type returned in the event of a conversion error.

pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>[src]

Performs the conversion.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, [src]

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>[src]

Performs the conversion.