Struct rustc_middle::ty::generics::Generics

source ·
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 ty::GenericArg (excluding child generics): Self (optionally), Lifetime params…, Type params…

Fields§

§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§

source§

impl<'tcx> Generics

source

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.

source

pub fn count(&self) -> usize

source

pub fn own_counts(&self) -> GenericParamCount

source

pub fn own_defaults(&self) -> GenericParamCount

source

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

source

pub fn own_requires_monomorphization(&self) -> bool

source

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

Returns the GenericParamDef with the given index.

source

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

Returns the GenericParamDef with the given index if available.

source

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

source

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

Returns the GenericParamDef associated with this EarlyParamRegion.

source

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

Returns the GenericParamDef associated with this ParamTy.

source

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

Returns the GenericParamDef associated with this ParamTy if it belongs to this Generics.

source

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

Returns the GenericParamDef associated with this ParamConst.

source

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

Returns true if params has impl Trait.

source

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

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

This should only be used for diagnostics purposes.

source

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.

source

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

Returns true if a concrete type is specified after a default type. For example, consider struct T<W = usize, X = Vec<W>>(W, X) T<usize, String> will return true T<usize> will return false

Trait Implementations§

source§

impl Clone for Generics

source§

fn clone(&self) -> Generics

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
source§

impl Debug for Generics

source§

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

Formats the value using the given formatter. Read more
source§

impl<__D: TyDecoder> Decodable<__D> for Generics

source§

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

source§

impl<__E: TyEncoder> Encodable<__E> for Generics

source§

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

source§

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

source§

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

source§

impl ParameterizedOverTcx for Generics

§

type Value<'tcx> = Generics

Auto Trait Implementations§

Blanket Implementations§

source§

impl<T> Aligned for T

source§

const ALIGN: Alignment = _

Alignment of Self.
source§

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

source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
source§

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

source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
source§

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

source§

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

Mutably borrows from an owned value. Read more
source§

impl<T, R> CollectAndApply<T, R> for T

source§

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

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

§

type Output = R

source§

impl<Tcx, T> DepNodeParams<Tcx> for T
where Tcx: DepContext, T: for<'a> HashStable<StableHashingContext<'a>> + Debug,

source§

default fn fingerprint_style() -> FingerprintStyle

source§

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).
source§

default fn to_debug_str(&self, _: Tcx) -> String

source§

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.
source§

impl<T> Filterable for T

source§

fn filterable( self, filter_name: &'static str ) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>

Creates a filterable data provider with the given name for debugging. Read more
source§

impl<T> From<T> for T

source§

fn from(t: T) -> T

Returns the argument unchanged.

source§

impl<T> Instrument for T

source§

fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
source§

fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
source§

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

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.

source§

impl<P> IntoQueryParam<P> for P

source§

impl<T> MaybeResult<T> for T

§

type Error = !

source§

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

source§

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

source§

impl<T> Same for T

§

type Output = T

Should always be Self
source§

impl<T> ToOwned for T
where T: Clone,

§

type Owned = T

The resulting type after obtaining ownership.
source§

fn to_owned(&self) -> T

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

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

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

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

source§

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

source§

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

§

type Error = Infallible

The type returned in the event of a conversion error.
source§

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

Performs the conversion.
source§

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

§

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

The type returned in the event of a conversion error.
source§

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

Performs the conversion.
source§

impl<V, T> VZip<V> for T
where V: MultiLane<T>,

source§

fn vzip(self) -> V

source§

impl<Tcx, T> Value<Tcx> for T
where Tcx: DepContext,

source§

default fn from_cycle_error( tcx: Tcx, cycle_error: &CycleError, _guar: ErrorGuaranteed ) -> T

source§

impl<T> WithSubscriber for T

source§

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
source§

fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
source§

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

source§

impl<T> ErasedDestructor for T
where T: 'static,

source§

impl<T> MaybeSendSync for 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: 104 bytes