Enum chalk_ir::GoalData [−][src]
pub enum GoalData<I: Interner> { Quantified(QuantifierKind, Binders<Goal<I>>), Implies(ProgramClauses<I>, Goal<I>), All(Goals<I>), Not(Goal<I>), EqGoal(EqGoal<I>), SubtypeGoal(SubtypeGoal<I>), DomainGoal(DomainGoal<I>), CannotProve, }
Expand description
A general goal; this is the full range of questions you can pose to Chalk.
Variants
Quantified(QuantifierKind, Binders<Goal<I>>)
Introduces a binding at depth 0, shifting other bindings up (deBruijn index).
Implies(ProgramClauses<I>, Goal<I>)
A goal that holds given some clauses (like an if-statement).
All(Goals<I>)
List of goals that all should hold.
Not(Goal<I>)
Negation: the inner goal should not hold.
EqGoal(EqGoal<I>)
Make two things equal; the rules for doing so are well known to the logic
SubtypeGoal(SubtypeGoal<I>)
Make one thing a subtype of another; the rules for doing so are well known to the logic
DomainGoal(DomainGoal<I>)
A “domain goal” indicates some base sort of goal that can be proven via program clauses
Indicates something that cannot be proven to be true or false
definitively. This can occur with overflow but also with
unifications of skolemized variables like forall<X,Y> { X = Y }
. Of course, that statement is false, as there exist types
X, Y where X = Y
is not true. But we treat it as “cannot
prove” so that forall<X,Y> { not { X = Y } }
also winds up
as cannot prove.
Implementations
Trait Implementations
The type of value that will be produced once folding is done.
Typically this is Self
, unless Self
contains borrowed
values, in which case owned values are produced (for example,
one can fold over a &T
value where T: Fold
, in which case
you get back a T
, not a &T
). Read more
Apply the given folder folder
to self
; binders
is the
number of binders that are in scope when beginning the
folder. Typically binders
starts as 0, but is adjusted when
we encounter Binders<T>
in the IR or other similar
constructs. Read more
type Interner = I
type Interner = I
The interner associated with the type.
fn visit_with<'i, B>(
&self,
visitor: &mut dyn Visitor<'i, I, BreakTy = B>,
outer_binder: DebruijnIndex
) -> ControlFlow<B> where
I: 'i,
[src]
fn visit_with<'i, B>(
&self,
visitor: &mut dyn Visitor<'i, I, BreakTy = B>,
outer_binder: DebruijnIndex
) -> ControlFlow<B> where
I: 'i,
[src]Apply the given visitor visitor
to self
; binders
is the
number of binders that are in scope when beginning the
visitor. Typically binders
starts as 0, but is adjusted when
we encounter Binders<T>
in the IR or other similar
constructs. Read more
impl<I: Interner> Copy for GoalData<I> where
I::InternedType: Copy,
I::InternedLifetime: Copy,
I::InternedGenericArg: Copy,
I::InternedSubstitution: Copy,
I::InternedGoal: Copy,
I::InternedGoals: Copy,
I::InternedProgramClauses: Copy,
I::InternedVariableKinds: Copy,
[src]Auto Trait Implementations
impl<I> RefUnwindSafe for GoalData<I> where
<I as Interner>::DefId: RefUnwindSafe,
<I as Interner>::InternedGenericArg: RefUnwindSafe,
<I as Interner>::InternedGoal: RefUnwindSafe,
<I as Interner>::InternedGoals: RefUnwindSafe,
<I as Interner>::InternedLifetime: RefUnwindSafe,
<I as Interner>::InternedProgramClauses: RefUnwindSafe,
<I as Interner>::InternedSubstitution: RefUnwindSafe,
<I as Interner>::InternedType: RefUnwindSafe,
<I as Interner>::InternedVariableKinds: RefUnwindSafe,
impl<I> Send for GoalData<I> where
<I as Interner>::DefId: Send,
<I as Interner>::InternedGenericArg: Send,
<I as Interner>::InternedGoal: Send,
<I as Interner>::InternedGoals: Send,
<I as Interner>::InternedLifetime: Send,
<I as Interner>::InternedProgramClauses: Send,
<I as Interner>::InternedSubstitution: Send,
<I as Interner>::InternedType: Send,
<I as Interner>::InternedVariableKinds: Send,
impl<I> Sync for GoalData<I> where
<I as Interner>::DefId: Sync,
<I as Interner>::InternedGenericArg: Sync,
<I as Interner>::InternedGoal: Sync,
<I as Interner>::InternedGoals: Sync,
<I as Interner>::InternedLifetime: Sync,
<I as Interner>::InternedProgramClauses: Sync,
<I as Interner>::InternedSubstitution: Sync,
<I as Interner>::InternedType: Sync,
<I as Interner>::InternedVariableKinds: Sync,
impl<I> Unpin for GoalData<I> where
<I as Interner>::DefId: Unpin,
<I as Interner>::InternedGenericArg: Unpin,
<I as Interner>::InternedGoal: Unpin,
<I as Interner>::InternedGoals: Unpin,
<I as Interner>::InternedLifetime: Unpin,
<I as Interner>::InternedProgramClauses: Unpin,
<I as Interner>::InternedSubstitution: Unpin,
<I as Interner>::InternedType: Unpin,
<I as Interner>::InternedVariableKinds: Unpin,
impl<I> UnwindSafe for GoalData<I> where
<I as Interner>::DefId: UnwindSafe,
<I as Interner>::InternedGenericArg: UnwindSafe,
<I as Interner>::InternedGoal: UnwindSafe,
<I as Interner>::InternedGoals: UnwindSafe,
<I as Interner>::InternedLifetime: UnwindSafe,
<I as Interner>::InternedProgramClauses: UnwindSafe,
<I as Interner>::InternedSubstitution: UnwindSafe,
<I as Interner>::InternedType: UnwindSafe,
<I as Interner>::InternedVariableKinds: UnwindSafe,
Blanket Implementations
Mutably borrows from an owned value. Read more
Cast a value to type U
using CastTo
.
impl<T, I> CouldMatch<T> for T where
T: Zip<I> + HasInterner<Interner = I> + ?Sized,
I: Interner,
[src]
impl<T, I> CouldMatch<T> for T where
T: Zip<I> + HasInterner<Interner = I> + ?Sized,
I: Interner,
[src]Checks whether self
and other
could possibly match.
Shifts this term in one level of binders.
Shifts a term valid at outer_binder
so that it is
valid at the innermost binder. See DebruijnIndex::shifted_in_from
for a detailed explanation. Read more
Shifts a term valid at the innermost binder so that it is
valid at outer_binder
. See DebruijnIndex::shifted_out_to
for a detailed explanation. Read more
Shifts this term out one level of binders.