Struct chalk_solve::rust_ir::GeneratorWitnessExistential [−][src]
Expand description
The generator witness types, together with existentially bound lifetimes. Each ‘witness type’ represents a type stored inside the generator across a yield. When a generator type is constructed, the precise region relationships found in the generator body are erased. As a result, we are left with existential lifetimes - each type is parameterized over some lifetimes, but we do not know their precise values.
Unlike the binder in GeneratorWitnessDatum
, this Binder
never gets substituted
via an Ty
. Instead, we handle this Binders
specially when determining
auto trait impls. See push_auto_trait_impls_generator_witness
for more details.
Fields
types: Binders<Vec<Ty<I>>>
Trait Implementations
type Result = GeneratorWitnessExistential<I>
type Result = GeneratorWitnessExistential<I>
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.
impl<I: PartialEq + Interner> PartialEq<GeneratorWitnessExistential<I>> for GeneratorWitnessExistential<I>
impl<I: PartialEq + Interner> PartialEq<GeneratorWitnessExistential<I>> for GeneratorWitnessExistential<I>
This method tests for self
and other
values to be equal, and is used
by ==
. Read more
This method tests for !=
.
Auto Trait Implementations
impl<I> RefUnwindSafe for GeneratorWitnessExistential<I> where
<I as Interner>::InternedType: RefUnwindSafe,
<I as Interner>::InternedVariableKinds: RefUnwindSafe,
impl<I> Send for GeneratorWitnessExistential<I> where
<I as Interner>::InternedType: Send,
<I as Interner>::InternedVariableKinds: Send,
impl<I> Sync for GeneratorWitnessExistential<I> where
<I as Interner>::InternedType: Sync,
<I as Interner>::InternedVariableKinds: Sync,
impl<I> Unpin for GeneratorWitnessExistential<I> where
<I as Interner>::InternedType: Unpin,
<I as Interner>::InternedVariableKinds: Unpin,
impl<I> UnwindSafe for GeneratorWitnessExistential<I> where
<I as Interner>::InternedType: UnwindSafe,
<I as Interner>::InternedVariableKinds: UnwindSafe,
Blanket Implementations
Mutably borrows from an owned value. Read more
fn cast<U>(self, interner: &<U as HasInterner>::Interner) -> U where
Self: CastTo<U>,
U: HasInterner,
fn cast<U>(self, interner: &<U as HasInterner>::Interner) -> U where
Self: CastTo<U>,
U: HasInterner,
Cast a value to type U
using CastTo
.
Compare self to key
and return true
if they are equal.
Instruments this type with the provided Span
, returning an
Instrumented
wrapper. Read more
Shifts this term in one level of binders.
pub fn shifted_in_from(
self,
interner: &I,
source_binder: DebruijnIndex
) -> <T as Fold<I>>::Result
pub fn shifted_in_from(
self,
interner: &I,
source_binder: DebruijnIndex
) -> <T as Fold<I>>::Result
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
pub fn shifted_out_to(
self,
interner: &I,
target_binder: DebruijnIndex
) -> Result<<T as Fold<I>>::Result, NoSolution>
pub fn shifted_out_to(
self,
interner: &I,
target_binder: DebruijnIndex
) -> Result<<T as Fold<I>>::Result, 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
Shifts this term out one level of binders.