Enum rustc_middle::ty::closure::ClosureKind
source · pub enum ClosureKind {
Fn,
FnMut,
FnOnce,
}
Expand description
Represents the various closure traits in the language. This
will determine the type of the environment (self
, in the
desugaring) argument that the closure expects.
You can get the environment type of a closure using
tcx.closure_env_ty()
.
Variants
Fn
FnMut
FnOnce
Implementations
sourceimpl<'tcx> ClosureKind
impl<'tcx> ClosureKind
pub const LATTICE_BOTTOM: ClosureKind = ClosureKind::Fn
sourcepub fn extends(self, other: ClosureKind) -> bool
pub fn extends(self, other: ClosureKind) -> bool
Returns true
if a type that impls this closure kind
must also implement other
.
sourcepub fn to_ty(self, tcx: TyCtxt<'tcx>) -> Ty<'tcx>
pub fn to_ty(self, tcx: TyCtxt<'tcx>) -> Ty<'tcx>
Returns the representative scalar type for this closure kind.
See Ty::to_opt_closure_kind
for more details.
pub fn from_def_id(tcx: TyCtxt<'_>, def_id: DefId) -> Option<ClosureKind>
pub fn to_def_id(&self, tcx: TyCtxt<'_>) -> DefId
Trait Implementations
sourceimpl Clone for ClosureKind
impl Clone for ClosureKind
sourcefn clone(&self) -> ClosureKind
fn clone(&self) -> ClosureKind
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 moresourceimpl Debug for ClosureKind
impl Debug for ClosureKind
sourceimpl<'tcx, __D: TyDecoder<I = TyCtxt<'tcx>>> Decodable<__D> for ClosureKind
impl<'tcx, __D: TyDecoder<I = TyCtxt<'tcx>>> Decodable<__D> for ClosureKind
sourceimpl<'tcx> Display for ClosureKind
impl<'tcx> Display for ClosureKind
sourceimpl<'tcx, __E: TyEncoder<I = TyCtxt<'tcx>>> Encodable<__E> for ClosureKind
impl<'tcx, __E: TyEncoder<I = TyCtxt<'tcx>>> Encodable<__E> for ClosureKind
sourceimpl Hash for ClosureKind
impl Hash for ClosureKind
sourceimpl<'__ctx> HashStable<StableHashingContext<'__ctx>> for ClosureKind
impl<'__ctx> HashStable<StableHashingContext<'__ctx>> for ClosureKind
fn hash_stable(
&self,
__hcx: &mut StableHashingContext<'__ctx>,
__hasher: &mut StableHasher
)
sourceimpl<'tcx> Lift<'tcx> for ClosureKind
impl<'tcx> Lift<'tcx> for ClosureKind
type Lifted = ClosureKind
fn lift_to_tcx(self, _: TyCtxt<'tcx>) -> Option<Self>
sourceimpl Ord for ClosureKind
impl Ord for ClosureKind
sourcefn cmp(&self, other: &ClosureKind) -> Ordering
fn cmp(&self, other: &ClosureKind) -> 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) -> Selfwhere
Self: PartialOrd<Self>,
fn clamp(self, min: Self, max: Self) -> Selfwhere
Self: PartialOrd<Self>,
Restrict a value to a certain interval. Read more
sourceimpl PartialEq<ClosureKind> for ClosureKind
impl PartialEq<ClosureKind> for ClosureKind
sourcefn eq(&self, other: &ClosureKind) -> bool
fn eq(&self, other: &ClosureKind) -> bool
sourceimpl PartialOrd<ClosureKind> for ClosureKind
impl PartialOrd<ClosureKind> for ClosureKind
sourcefn partial_cmp(&self, other: &ClosureKind) -> Option<Ordering>
fn partial_cmp(&self, other: &ClosureKind) -> Option<Ordering>
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 moresourceimpl<'tcx, P: PrettyPrinter<'tcx>> Print<'tcx, P> for ClosureKind
impl<'tcx, P: PrettyPrinter<'tcx>> Print<'tcx, P> for ClosureKind
sourceimpl<'tcx> TypeFoldable<'tcx> for ClosureKind
impl<'tcx> TypeFoldable<'tcx> for ClosureKind
sourcefn try_fold_with<F: FallibleTypeFolder<'tcx>>(
self,
_: &mut F
) -> Result<ClosureKind, F::Error>
fn try_fold_with<F: FallibleTypeFolder<'tcx>>(
self,
_: &mut F
) -> Result<ClosureKind, F::Error>
sourcefn fold_with<F: TypeFolder<'tcx>>(self, folder: &mut F) -> Self
fn fold_with<F: TypeFolder<'tcx>>(self, folder: &mut F) -> Self
A convenient alternative to
try_fold_with
for use with infallible
folders. Do not override this method, to ensure coherence with
try_fold_with
. Read moresourceimpl<'tcx> TypeVisitable<'tcx> for ClosureKind
impl<'tcx> TypeVisitable<'tcx> for ClosureKind
sourcefn visit_with<F: TypeVisitor<'tcx>>(&self, _: &mut F) -> ControlFlow<F::BreakTy>
fn visit_with<F: TypeVisitor<'tcx>>(&self, _: &mut F) -> ControlFlow<F::BreakTy>
sourcefn has_vars_bound_at_or_above(&self, binder: DebruijnIndex) -> bool
fn has_vars_bound_at_or_above(&self, binder: DebruijnIndex) -> bool
Returns
true
if self
has any late-bound regions that are either
bound by binder
or bound by some binder outside of binder
.
If binder
is ty::INNERMOST
, this indicates whether
there are any late-bound regions that appear free. Read moresourcefn has_vars_bound_above(&self, binder: DebruijnIndex) -> bool
fn has_vars_bound_above(&self, binder: DebruijnIndex) -> bool
Returns
true
if this self
has any regions that escape binder
(and
hence are not bound by it). Read morefn has_escaping_bound_vars(&self) -> bool
fn has_type_flags(&self, flags: TypeFlags) -> bool
fn has_projections(&self) -> bool
fn has_opaque_types(&self) -> bool
fn references_error(&self) -> bool
fn error_reported(&self) -> Option<ErrorGuaranteed>
fn has_param_types_or_consts(&self) -> bool
fn has_infer_regions(&self) -> bool
fn has_infer_types(&self) -> bool
fn has_infer_types_or_consts(&self) -> bool
fn needs_infer(&self) -> bool
fn has_placeholders(&self) -> bool
fn needs_subst(&self) -> bool
sourcefn has_free_regions(&self) -> bool
fn has_free_regions(&self) -> bool
“Free” regions in this context means that it has any region
that is not (a) erased or (b) late-bound. Read more
fn has_erased_regions(&self) -> bool
sourcefn has_erasable_regions(&self) -> bool
fn has_erasable_regions(&self) -> bool
True if there are any un-erased free regions.
sourcefn is_global(&self) -> bool
fn is_global(&self) -> bool
Indicates whether this value references only ‘global’
generic parameters that are the same regardless of what fn we are
in. This is used for caching. Read more
sourcefn has_late_bound_regions(&self) -> bool
fn has_late_bound_regions(&self) -> bool
True if there are any late-bound regions
sourcefn still_further_specializable(&self) -> bool
fn still_further_specializable(&self) -> bool
Indicates whether this value still has parameters/placeholders/inference variables
which could be replaced later, in a way that would change the results of
impl
specialization. Read moreimpl Copy for ClosureKind
impl Eq for ClosureKind
impl StructuralEq for ClosureKind
impl StructuralPartialEq for ClosureKind
Auto Trait Implementations
impl RefUnwindSafe for ClosureKind
impl Send for ClosureKind
impl Sync for ClosureKind
impl Unpin for ClosureKind
impl UnwindSafe for ClosureKind
Blanket Implementations
sourceimpl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere
T: Copy,
impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere
T: Copy,
fn allocate_on(self, arena: &'a Arena<'tcx>) -> &'a mut T
fn allocate_from_iter(
arena: &'a Arena<'tcx>,
iter: impl IntoIterator<Item = T>
) -> &'a mut [T]ⓘNotable traits for &[u8]impl Read for &[u8]impl Write for &mut [u8]
sourceimpl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
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<Ctxt, T> DepNodeParams<Ctxt> for Twhere
Ctxt: DepContext,
T: for<'a> HashStable<StableHashingContext<'a>> + Debug,
impl<Ctxt, T> DepNodeParams<Ctxt> for Twhere
Ctxt: DepContext,
T: for<'a> HashStable<StableHashingContext<'a>> + Debug,
default fn fingerprint_style() -> FingerprintStyle
sourcedefault fn to_fingerprint(&self, tcx: Ctxt) -> Fingerprint
default fn to_fingerprint(&self, tcx: Ctxt) -> Fingerprint
This method turns the parameters of a DepNodeConstructor into an opaque
Fingerprint to be used in DepNode.
Not all DepNodeParams support being turned into a Fingerprint (they
don’t need to if the corresponding DepNode is anonymous). Read more
default fn to_debug_str(&self, Ctxt) -> String
sourcedefault fn recover(Ctxt, &DepNode<<Ctxt as DepContext>::DepKind>) -> Option<T>
default fn recover(Ctxt, &DepNode<<Ctxt as DepContext>::DepKind>) -> Option<T>
This method tries to recover the query key from the given
DepNode
,
something which is needed when forcing DepNode
s during red-green
evaluation. The query system will only call this method if
fingerprint_style()
is not FingerprintStyle::Opaque
.
It is always valid to return None
here, in which case incremental
compilation will treat the query as having changed instead of forcing it. Read moresourceimpl<T, R> InternIteratorElement<T, R> for T
impl<T, R> InternIteratorElement<T, R> for T
type Output = R
fn intern_with<I, F>(iter: I, f: F) -> <T as InternIteratorElement<T, R>>::Outputwhere
I: Iterator<Item = T>,
F: FnOnce(&[T]) -> R,
sourceimpl<T> MaybeResult<T> for T
impl<T> MaybeResult<T> for T
sourceimpl<CTX, T> Value<CTX> for Twhere
CTX: DepContext,
impl<CTX, T> Value<CTX> for Twhere
CTX: DepContext,
default fn from_cycle_error(tcx: CTX) -> T
impl<'a, T> Captures<'a> for Twhere
T: ?Sized,
Layout
Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...)
attributes. Please see the Rust Reference’s “Type Layout” chapter for details on type layout guarantees.
Size: 1 byte
Size for each variant:
Fn
: 0 bytesFnMut
: 0 bytesFnOnce
: 0 bytes