Struct rustc_middle::ty::DeducedParamAttrs
source · pub struct DeducedParamAttrs {
pub read_only: bool,
}Expand description
Parameter attributes that can only be determined by examining the body of a function instead of just its signature.
These can be useful for optimization purposes when a function is directly called. We compute them and store them into the crate metadata so that downstream crates can make use of them.
Right now, we only have read_only, but no_capture and no_alias might be useful in the
future.
Fields§
§read_only: boolThe parameter is marked immutable in the function and contains no UnsafeCell (i.e. its
type is freeze).
Trait Implementations§
source§impl Clone for DeducedParamAttrs
impl Clone for DeducedParamAttrs
source§fn clone(&self) -> DeducedParamAttrs
fn clone(&self) -> DeducedParamAttrs
Returns a copy of the value. Read more
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from
source. Read moresource§impl Debug for DeducedParamAttrs
impl Debug for DeducedParamAttrs
source§impl Default for DeducedParamAttrs
impl Default for DeducedParamAttrs
source§fn default() -> DeducedParamAttrs
fn default() -> DeducedParamAttrs
Returns the “default value” for a type. Read more
source§impl<'__ctx> HashStable<StableHashingContext<'__ctx>> for DeducedParamAttrs
impl<'__ctx> HashStable<StableHashingContext<'__ctx>> for DeducedParamAttrs
fn hash_stable(
&self,
__hcx: &mut StableHashingContext<'__ctx>,
__hasher: &mut StableHasher
)
source§impl ParameterizedOverTcx for DeducedParamAttrs
impl ParameterizedOverTcx for DeducedParamAttrs
type Value<'tcx> = DeducedParamAttrs
source§impl PartialEq<DeducedParamAttrs> for DeducedParamAttrs
impl PartialEq<DeducedParamAttrs> for DeducedParamAttrs
source§fn eq(&self, other: &DeducedParamAttrs) -> bool
fn eq(&self, other: &DeducedParamAttrs) -> bool
source§impl<'tcx, D: TyDecoder<I = TyCtxt<'tcx>>> RefDecodable<'tcx, D> for DeducedParamAttrs
impl<'tcx, D: TyDecoder<I = TyCtxt<'tcx>>> RefDecodable<'tcx, D> for DeducedParamAttrs
impl Copy for DeducedParamAttrs
impl StructuralPartialEq for DeducedParamAttrs
Auto Trait Implementations§
impl RefUnwindSafe for DeducedParamAttrs
impl Send for DeducedParamAttrs
impl Sync for DeducedParamAttrs
impl Unpin for DeducedParamAttrs
impl UnwindSafe for DeducedParamAttrs
Blanket Implementations§
source§impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere
T: Copy,
impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere
T: Copy,
fn allocate_on<'a>(self, arena: &'a Arena<'tcx>) -> &'a mut T
fn allocate_from_iter<'a>(
arena: &'a Arena<'tcx>,
iter: impl IntoIterator<Item = T>
) -> &'a mut [T] ⓘ
source§impl<Tcx, T> DepNodeParams<Tcx> for Twhere
Tcx: DepContext,
T: for<'a> HashStable<StableHashingContext<'a>> + Debug,
impl<Tcx, T> DepNodeParams<Tcx> for Twhere
Tcx: DepContext,
T: for<'a> HashStable<StableHashingContext<'a>> + Debug,
default fn fingerprint_style() -> FingerprintStyle
source§default fn to_fingerprint(&self, tcx: Tcx) -> Fingerprint
default fn to_fingerprint(&self, tcx: Tcx) -> 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, _: Tcx) -> String
source§default fn recover(
_: Tcx,
_: &DepNode<<Tcx as DepContext>::DepKind>
) -> Option<T>
default fn recover(
_: Tcx,
_: &DepNode<<Tcx as DepContext>::DepKind>
) -> Option<T>
This method tries to recover the query key from the given
DepNode,
something which is needed when forcing DepNodes 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 moresource§impl<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,
source§impl<T> MaybeResult<T> for T
impl<T> MaybeResult<T> for T
source§impl<'tcx, T> ToPredicate<'tcx, T> for T
impl<'tcx, T> ToPredicate<'tcx, T> for T
fn to_predicate(self, _tcx: TyCtxt<'tcx>) -> T
source§impl<Tcx, T> Value<Tcx> for Twhere
Tcx: DepContext,
impl<Tcx, T> Value<Tcx> for Twhere
Tcx: DepContext,
default fn from_cycle_error(tcx: Tcx, _: &[QueryInfo]) -> T
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