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: bool

The parameter is marked immutable in the function and contains no UnsafeCell (i.e. its type is freeze).

Trait Implementations

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impl Clone for DeducedParamAttrs

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fn clone(&self) -> DeducedParamAttrs

Returns a copy of the value. Read more

1.0.0 · source

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

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impl Debug for DeducedParamAttrs

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

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fn default() -> DeducedParamAttrs

Returns the “default value” for a type. Read more

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impl<'tcx, E: TyEncoder>> Encodable<E> for DeducedParamAttrs

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fn encode(&self, encoder: &mut E)

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impl<'ctx> HashStable<StableHashingContext<'ctx>> for DeducedParamAttrs

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fn hash_stable(
 &self,
 hcx: &mut StableHashingContext<'ctx>,
 __hasher: &mut StableHasher
)

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impl ParameterizedOverTcx for DeducedParamAttrs

type Value<'tcx> = DeducedParamAttrs

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impl PartialEq<DeducedParamAttrs> for DeducedParamAttrs

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fn eq(&self, other: &DeducedParamAttrs) -> bool

This method tests for self and other values to be equal, and is used by ==. Read more

1.0.0 · source

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason. Read more

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impl<'tcx, D: TyDecoder>> RefDecodable<'tcx, D> for DeducedParamAttrs

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fn decode(decoder: &mut D) -> &'tcx Self

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impl Copy for DeducedParamAttrs

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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

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impl<T> Any for Twhere
T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere
T: Copy,

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fn allocate_on(self, arena: &'a Arena<'tcx>) -> &'a mut T

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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]`

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impl<T> Borrow<T> for Twhere
T: ?Sized,

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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impl<T> BorrowMut<T> for Twhere
T: ?Sized,

const: unstable · source

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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impl<Ctxt, T> DepNodeParams<Ctxt> for Twhere
Ctxt: DepContext,
T: for<'a> HashStable<StableHashingContext<'a>> + Debug,

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default fn fingerprint_style() -> FingerprintStyle

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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

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default fn to_debug_str(&self, Ctxt) -> String

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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 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 more

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impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, R> InternIteratorElement<T, R> for T

type Output = R

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fn intern_with<I, F>(iter: I, f: F) -> <T as InternIteratorElement<T, R>>::Outputwhere
I: Iterator<Item = T>,
F: FnOnce(&[T]) -> R,

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impl<T, U> Into for Twhere
U: From<T>,

const: unstable · source

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> MaybeResult<T> for T

type Error = !

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fn from(Result<T, <T as MaybeResult<T>>::Error>) -> T

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fn to_result(self) -> Result<T, <T as MaybeResult<T>>::Error>

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impl<T> ToOwned for Twhere
T: Clone,

type Owned = T

The resulting type after obtaining ownership.

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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more

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impl<T, U> TryFrom for Twhere
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>

Performs the conversion.

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impl<T, U> TryInto for Twhere
U: TryFrom<T>,

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source

fn try_into(self) -> Result<U, >::Error>

Performs the conversion.

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impl<CTX, T> Value<CTX> for Twhere
CTX: DepContext,

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default fn from_cycle_error(tcx: CTX, &[QueryInfo]) -> T

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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

Struct rustc_middle::ty::DeducedParamAttrs

Fields

Trait Implementations

impl Clone for DeducedParamAttrs

fn clone(&self) -> DeducedParamAttrs

fn clone_from(&mut self, source: &Self)

impl Debug for DeducedParamAttrs

fn fmt(&self, f: &mut Formatter<'_>) -> Result

impl<'tcx, __D: TyDecoder<I = TyCtxt<'tcx>>> Decodable<__D> for DeducedParamAttrs

fn decode(__decoder: &mut __D) -> Self

impl Default for DeducedParamAttrs

fn default() -> DeducedParamAttrs

impl<'tcx, __E: TyEncoder<I = TyCtxt<'tcx>>> Encodable<__E> for DeducedParamAttrs

fn encode(&self, __encoder: &mut __E)

impl<'__ctx> HashStable<StableHashingContext<'__ctx>> for DeducedParamAttrs

fn hash_stable( &self, __hcx: &mut StableHashingContext<'__ctx>, __hasher: &mut StableHasher)

impl ParameterizedOverTcx for DeducedParamAttrs

type Value<'tcx> = DeducedParamAttrs

impl PartialEq<DeducedParamAttrs> for DeducedParamAttrs

fn eq(&self, other: &DeducedParamAttrs) -> bool

fn ne(&self, other: &Rhs) -> bool

impl<'tcx, D: TyDecoder<I = TyCtxt<'tcx>>> RefDecodable<'tcx, D> for DeducedParamAttrs

fn decode(decoder: &mut D) -> &'tcx Self

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

impl<T> Any for Twhere T: 'static + ?Sized,

fn type_id(&self) -> TypeId

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]

impl<T> Borrow<T> for Twhere T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for Twhere T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

impl<Ctxt, T> DepNodeParams<Ctxt> for Twhere Ctxt: DepContext, T: for<'a> HashStable<StableHashingContext<'a>> + Debug,

default fn fingerprint_style() -> FingerprintStyle

default fn to_fingerprint(&self, tcx: Ctxt) -> Fingerprint

default fn to_debug_str(&self, Ctxt) -> String

default fn recover(Ctxt, &DepNode<<Ctxt as DepContext>::DepKind>) -> Option<T>

impl<T> From<T> for T

fn from(t: T) -> 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,

impl<T, U> Into<U> for Twhere U: From<T>,

fn into(self) -> U

impl<T> MaybeResult<T> for T

type Error = !

fn from(Result<T, <T as MaybeResult<T>>::Error>) -> T

fn to_result(self) -> Result<T, <T as MaybeResult<T>>::Error>

impl<T> ToOwned for Twhere T: Clone,

type Owned = T

fn to_owned(&self) -> T

fn clone_into(&self, target: &mut T)

impl<T, U> TryFrom<U> for Twhere U: Into<T>,

type Error = Infallible

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

impl<CTX, T> Value<CTX> for Twhere CTX: DepContext,

default fn from_cycle_error(tcx: CTX, &[QueryInfo]) -> T

impl<'a, T> Captures<'a> for Twhere T: ?Sized,

Layout

impl<'tcx, D: TyDecoder<I = TyCtxt<'tcx>>> Decodable<D> for DeducedParamAttrs

fn decode(decoder: &mut D) -> Self

impl<'tcx, E: TyEncoder<I = TyCtxt<'tcx>>> Encodable<E> for DeducedParamAttrs

fn encode(&self, encoder: &mut E)

impl<'ctx> HashStable<StableHashingContext<'ctx>> for DeducedParamAttrs

fn hash_stable(
&self,
hcx: &mut StableHashingContext<'ctx>,
__hasher: &mut StableHasher
)

impl<T> Any for Twhere
T: 'static + ?Sized,

impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere
T: Copy,

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]`

impl<T> Borrow<T> for Twhere
T: ?Sized,

impl<T> BorrowMut<T> for Twhere
T: ?Sized,

impl<Ctxt, T> DepNodeParams<Ctxt> for Twhere
Ctxt: DepContext,
T: for<'a> HashStable<StableHashingContext<'a>> + Debug,

fn intern_with<I, F>(iter: I, f: F) -> <T as InternIteratorElement<T, R>>::Outputwhere
I: Iterator<Item = T>,
F: FnOnce(&[T]) -> R,

impl<T, U> Into<U> for Twhere
U: From<T>,

impl<T> ToOwned for Twhere
T: Clone,

impl<T, U> TryFrom<U> for Twhere
U: Into<T>,

impl<T, U> TryInto<U> for Twhere
U: TryFrom<T>,

impl<CTX, T> Value<CTX> for Twhere
CTX: DepContext,

impl<'a, T> Captures<'a> for Twhere
T: ?Sized,