Struct rustc::ty::Generics

pub struct Generics {
    pub parent: Option<DefId>,
    pub parent_regions: u32,
    pub parent_types: u32,
    pub regions: Vec<RegionParameterDef>,
    pub types: Vec<TypeParameterDef>,
    pub type_param_to_index: BTreeMap<DefIndex, u32>,
    pub has_self: bool,
    pub has_late_bound_regions: Option<Span>,
}

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

Note that in the presence of a Self parameter, the ordering here is different from the ordering in a Substs. Substs are ordered as Self, *Regions, *Other Type Params, (...child generics) while this struct is ordered as regions = Regions types = [Self, *Other Type Params]

Fields

parent: Option<DefId>

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parent_regions: u32

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parent_types: u32

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regions: Vec<RegionParameterDef>

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types: Vec<TypeParameterDef>

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type_param_to_index: BTreeMap<DefIndex, u32>

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Reverse map to each TypeParameterDef's index field, from def_id.index (def_id.krate is the same as the item's).

has_self: bool

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has_late_bound_regions: Option<Span>

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Methods

impl<'a, 'gcx, 'tcx> Generics

pub fn parent_count(&self) -> usize

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pub fn own_count(&self) -> usize

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pub fn count(&self) -> usize

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

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

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Returns the TypeParameterDef associated with this ParamTy.

Trait Implementations

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

fn hash_stable<W: StableHasherResult>(
    &self,
    hcx: &mut StableHashingContext<'gcx>,
    hasher: &mut StableHasher<W>
)

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impl Clone for Generics

fn clone(&self) -> Generics

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Generics

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Encodable for Generics

fn encode<__S: Encoder>(&self, __arg_0: &mut __S) -> Result<(), __S::Error>

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impl Decodable for Generics

fn decode<__D: Decoder>(__arg_0: &mut __D) -> Result<Generics, __D::Error>

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