Enum chalk_ir::QuantifierKind
source · [−]pub enum QuantifierKind {
ForAll,
Exists,
}
Expand description
Kinds of quantifiers in the logic, such as forall
and exists
.
Variants
ForAll
Universal quantifier ForAll
.
A formula with the universal quantifier forall(x). P(x)
is satisfiable
if and only if the subformula P(x)
is true for all possible values for x.
Exists
Existential quantifier Exists
.
A formula with the existential quantifier exists(x). P(x)
is satisfiable
if and only if there exists at least one value for all possible values of x
which satisfies the subformula P(x)
.
In the context of chalk, the existential quantifier usually demands the
existence of exactly one instance (i.e. type) that satisfies the formula
(i.e. type constraints). More than one instance means that the result is ambiguous.
Trait Implementations
sourceimpl Clone for QuantifierKind
impl Clone for QuantifierKind
sourcefn clone(&self) -> QuantifierKind
fn clone(&self) -> QuantifierKind
Returns a copy of the value. Read more
1.0.0 · sourcefn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from source
. Read more
sourceimpl Debug for QuantifierKind
impl Debug for QuantifierKind
sourceimpl Hash for QuantifierKind
impl Hash for QuantifierKind
sourceimpl Ord for QuantifierKind
impl Ord for QuantifierKind
sourcefn cmp(&self, other: &QuantifierKind) -> Ordering
fn cmp(&self, other: &QuantifierKind) -> Ordering
1.21.0 · sourcefn max(self, other: Self) -> Self
fn max(self, other: Self) -> Self
Compares and returns the maximum of two values. Read more
1.21.0 · sourcefn min(self, other: Self) -> Self
fn min(self, other: Self) -> Self
Compares and returns the minimum of two values. Read more
1.50.0 · sourcefn clamp(self, min: Self, max: Self) -> Self where
Self: PartialOrd<Self>,
fn clamp(self, min: Self, max: Self) -> Self where
Self: PartialOrd<Self>,
Restrict a value to a certain interval. Read more
sourceimpl PartialEq<QuantifierKind> for QuantifierKind
impl PartialEq<QuantifierKind> for QuantifierKind
sourceimpl PartialOrd<QuantifierKind> for QuantifierKind
impl PartialOrd<QuantifierKind> for QuantifierKind
sourcefn partial_cmp(&self, other: &QuantifierKind) -> Option<Ordering>
fn partial_cmp(&self, other: &QuantifierKind) -> Option<Ordering>
This method returns an ordering between self
and other
values if one exists. Read more
1.0.0 · sourcefn lt(&self, other: &Rhs) -> bool
fn lt(&self, other: &Rhs) -> bool
This method tests less than (for self
and other
) and is used by the <
operator. Read more
1.0.0 · sourcefn le(&self, other: &Rhs) -> bool
fn le(&self, other: &Rhs) -> bool
This method tests less than or equal to (for self
and other
) and is used by the <=
operator. Read more
sourceimpl<I: Interner> TypeFoldable<I> for QuantifierKind
impl<I: Interner> TypeFoldable<I> for QuantifierKind
sourcefn fold_with<E>(
self,
_folder: &mut dyn TypeFolder<I, Error = E>,
_outer_binder: DebruijnIndex
) -> Result<Self, E>
fn fold_with<E>(
self,
_folder: &mut dyn TypeFolder<I, Error = E>,
_outer_binder: DebruijnIndex
) -> Result<Self, E>
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
sourceimpl<I: Interner> TypeVisitable<I> for QuantifierKind
impl<I: Interner> TypeVisitable<I> for QuantifierKind
sourcefn visit_with<B>(
&self,
_visitor: &mut dyn TypeVisitor<I, BreakTy = B>,
_outer_binder: DebruijnIndex
) -> ControlFlow<B>
fn visit_with<B>(
&self,
_visitor: &mut dyn TypeVisitor<I, BreakTy = B>,
_outer_binder: DebruijnIndex
) -> ControlFlow<B>
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
sourceimpl<I: Interner> Zip<I> for QuantifierKind
impl<I: Interner> Zip<I> for QuantifierKind
impl Copy for QuantifierKind
impl Eq for QuantifierKind
impl StructuralEq for QuantifierKind
impl StructuralPartialEq for QuantifierKind
Auto Trait Implementations
impl RefUnwindSafe for QuantifierKind
impl Send for QuantifierKind
impl Sync for QuantifierKind
impl Unpin for QuantifierKind
impl UnwindSafe for QuantifierKind
Blanket Implementations
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
sourceimpl<T> Cast for T
impl<T> Cast for T
sourcefn cast<U>(self, interner: U::Interner) -> U where
Self: CastTo<U>,
U: HasInterner,
fn cast<U>(self, interner: U::Interner) -> U where
Self: CastTo<U>,
U: HasInterner,
Cast a value to type U
using CastTo
.
sourceimpl<T, I> Shift<I> for T where
T: TypeFoldable<I>,
I: Interner,
impl<T, I> Shift<I> for T where
T: TypeFoldable<I>,
I: Interner,
sourcefn shifted_in(self, interner: I) -> T
fn shifted_in(self, interner: I) -> T
Shifts this term in one level of binders.
sourcefn shifted_in_from(self, interner: I, source_binder: DebruijnIndex) -> T
fn shifted_in_from(self, interner: I, source_binder: DebruijnIndex) -> T
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
sourcefn shifted_out_to(
self,
interner: I,
target_binder: DebruijnIndex
) -> Result<T, NoSolution>
fn shifted_out_to(
self,
interner: I,
target_binder: DebruijnIndex
) -> Result<T, NoSolution>
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
sourcefn shifted_out(self, interner: I) -> Result<T, NoSolution>
fn shifted_out(self, interner: I) -> Result<T, NoSolution>
Shifts this term out one level of binders.
sourceimpl<T, I> VisitExt<I> for T where
I: Interner,
T: TypeVisitable<I>,
impl<T, I> VisitExt<I> for T where
I: Interner,
T: TypeVisitable<I>,
sourcefn has_free_vars(&self, interner: I) -> bool
fn has_free_vars(&self, interner: I) -> bool
Check whether there are free (non-bound) variables.