pub struct Generics {
    pub parent: Option<DefId>,
    pub parent_count: usize,
    pub params: Vec<GenericParamDef>,
    pub param_def_id_to_index: FxHashMap<DefId, u32>,
    pub has_self: bool,
    pub has_late_bound_regions: Option<Span>,
    pub host_effect_index: Option<usize>,
}
Expand description

Information about the formal type/lifetime parameters associated with an item or method. Analogous to hir::Generics.

The ordering of parameters is the same as in Subst (excluding child generics): Self (optionally), Lifetime params…, Type params…

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§parent: Option<DefId>§parent_count: usize§params: Vec<GenericParamDef>§param_def_id_to_index: FxHashMap<DefId, u32>

Reverse map to the index field of each GenericParamDef.

§has_self: bool§has_late_bound_regions: Option<Span>§host_effect_index: Option<usize>

Implementations§

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impl<'tcx> Generics

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pub fn param_def_id_to_index( &self, tcx: TyCtxt<'tcx>, def_id: DefId ) -> Option<u32>

Looks through the generics and all parents to find the index of the given param def-id. This is in comparison to the param_def_id_to_index struct member, which only stores information about this item’s own generics.

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pub fn count(&self) -> usize

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pub fn own_counts(&self) -> GenericParamCount

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pub fn own_defaults(&self) -> GenericParamCount

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pub fn requires_monomorphization(&self, tcx: TyCtxt<'tcx>) -> bool

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pub fn own_requires_monomorphization(&self) -> bool

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pub fn param_at( &'tcx self, param_index: usize, tcx: TyCtxt<'tcx> ) -> &'tcx GenericParamDef

Returns the GenericParamDef with the given index.

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pub fn params_to( &'tcx self, param_index: usize, tcx: TyCtxt<'tcx> ) -> &'tcx [GenericParamDef]

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pub fn region_param( &'tcx self, param: &EarlyBoundRegion, tcx: TyCtxt<'tcx> ) -> &'tcx GenericParamDef

Returns the GenericParamDef associated with this EarlyBoundRegion.

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pub fn type_param( &'tcx self, param: &ParamTy, tcx: TyCtxt<'tcx> ) -> &'tcx GenericParamDef

Returns the GenericParamDef associated with this ParamTy.

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pub fn const_param( &'tcx self, param: &ParamConst, tcx: TyCtxt<'tcx> ) -> &GenericParamDef

Returns the GenericParamDef associated with this ParamConst.

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pub fn has_impl_trait(&'tcx self) -> bool

Returns true if params has impl Trait.

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pub fn own_args_no_defaults( &'tcx self, tcx: TyCtxt<'tcx>, args: &'tcx [GenericArg<'tcx>] ) -> &'tcx [GenericArg<'tcx>]

Returns the args corresponding to the generic parameters of this item, excluding Self.

This should only be used for diagnostics purposes.

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pub fn own_args( &'tcx self, args: &'tcx [GenericArg<'tcx>] ) -> &'tcx [GenericArg<'tcx>]

Returns the args corresponding to the generic parameters of this item, excluding Self.

This should only be used for diagnostics purposes.

Trait Implementations§

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impl Clone for Generics

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fn clone(&self) -> Generics

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Generics

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

Formats the value using the given formatter. Read more
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impl<'tcx, __D: TyDecoder<I = TyCtxt<'tcx>>> Decodable<__D> for Generics

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

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

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

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

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

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impl ParameterizedOverTcx for Generics

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type Value<'tcx> = Generics

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Blanket Implementations§

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impl<T> Aligned for T

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const ALIGN: Alignment = _

Alignment of Self.
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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<T> Borrow<T> for Twhere T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

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

Mutably borrows from an owned value. Read more
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impl<T, R> CollectAndApply<T, R> for T

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fn collect_and_apply<I, F>(iter: I, f: F) -> Rwhere I: Iterator<Item = T>, F: FnOnce(&[T]) -> R,

Equivalent to f(&iter.collect::<Vec<_>>()).

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type Output = R

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impl<Tcx, T> DepNodeParams<Tcx> for Twhere Tcx: 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: 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).
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default fn to_debug_str(&self, _: Tcx) -> String

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default fn recover(_: Tcx, _: &DepNode) -> 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.
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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

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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<P> IntoQueryParam<P> for P

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impl<T> MaybeResult<T> for T

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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,

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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<'tcx, T> ToPredicate<'tcx, T> for T

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fn to_predicate(self, _tcx: TyCtxt<'tcx>) -> T

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

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<Tcx, T> Value<Tcx> for Twhere Tcx: DepContext,

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default fn from_cycle_error( tcx: Tcx, cycle: &[QueryInfo], _guar: ErrorGuaranteed ) -> T

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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: 104 bytes