Struct rustc::ty::subst::Substs

pub struct Substs<'tcx> {
    pub types: VecPerParamSpace<Ty<'tcx>>,
    pub regions: VecPerParamSpace<Region>,
}

Unstable (rustc_private)

A substitution mapping type/region parameters to new values. We identify each in-scope parameter by an index and a parameter space (which indices where the parameter is defined; see ParamSpace).

Fields

types: VecPerParamSpace<Ty<'tcx>>

Unstable (rustc_private)

regions: VecPerParamSpace<Region>

Unstable (rustc_private)

Methods

impl<'a, 'gcx, 'tcx> Substs<'tcx>

fn new(t: VecPerParamSpace<Ty<'tcx>>, r: VecPerParamSpace<Region>) -> Substs<'tcx>

fn new_type(t: Vec<Ty<'tcx>>, r: Vec<Region>) -> Substs<'tcx>

fn new_trait(t: Vec<Ty<'tcx>>, r: Vec<Region>, s: Ty<'tcx>) -> Substs<'tcx>

fn empty() -> Substs<'tcx>

fn is_noop(&self) -> bool

fn type_for_def(&self, ty_param_def: &TypeParameterDef) -> Ty<'tcx>

fn self_ty(&self) -> Option<Ty<'tcx>>

fn with_self_ty(&self, self_ty: Ty<'tcx>) -> Substs<'tcx>

fn erase_regions(self) -> Substs<'tcx>

fn with_method(self, m_types: Vec<Ty<'tcx>>, m_regions: Vec<Region>) -> Substs<'tcx>

fn with_method_from(&self, meth_substs: &Substs<'tcx>) -> Substs<'tcx>

fn with_method_from_subst(&self, other: &Substs<'tcx>) -> Substs<'tcx>

fn to_trait_ref(&self, tcx: TyCtxt<'a, 'gcx, 'tcx>, trait_id: DefId) -> TraitRef<'tcx>

Unstable (rustc_private)

Creates a trait-ref out of this substs, ignoring the FnSpace substs

Trait Implementations

impl<'gcx> TransNormalize<'gcx> for &'gcx Substs<'gcx>

fn trans_normalize<'a, 'tcx>(&self, infcx: &InferCtxt<'a, 'gcx, 'tcx>) -> Self

impl<'tcx> Relate<'tcx> for &'tcx Substs<'tcx>

fn relate<'a, 'gcx, R>(relation: &mut R, a: &&'tcx Substs<'tcx>, b: &&'tcx Substs<'tcx>) -> RelateResult<'tcx, &'tcx Substs<'tcx>> where R: TypeRelation<'a, 'gcx, 'tcx>, 'gcx: 'a + 'tcx, 'tcx: 'a

impl<'tcx> Encodable for Substs<'tcx>

fn encode<S: Encoder>(&self, s: &mut S) -> Result<(), S::Error>

impl<'tcx> Decodable for Substs<'tcx>

fn decode<D: Decoder>(d: &mut D) -> Result<Substs<'tcx>, D::Error>

impl<'tcx> Decodable for &'tcx Substs<'tcx>

fn decode<D: Decoder>(d: &mut D) -> Result<&'tcx Substs<'tcx>, D::Error>

impl<'a, 'tcx> Lift<'tcx> for &'a Substs<'a>

type Lifted = &'tcx Substs<'tcx>

fn lift_to_tcx<'b, 'gcx>(&self, tcx: TyCtxt<'b, 'gcx, 'tcx>) -> Option<&'tcx Substs<'tcx>>

impl<'tcx> TypeFoldable<'tcx> for &'tcx Substs<'tcx>

fn super_fold_with<'gcx: 'tcx, F: TypeFolder<'gcx, 'tcx>>(&self, folder: &mut F) -> Self

fn fold_with<'gcx: 'tcx, F: TypeFolder<'gcx, 'tcx>>(&self, folder: &mut F) -> Self

fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool

fn visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool

fn has_regions_escaping_depth(&self, depth: u32) -> bool

fn has_escaping_regions(&self) -> bool

fn has_type_flags(&self, flags: TypeFlags) -> bool

fn has_projection_types(&self) -> bool

fn references_error(&self) -> bool

fn has_param_types(&self) -> bool

fn has_self_ty(&self) -> bool

fn has_infer_types(&self) -> bool

fn needs_infer(&self) -> bool

fn needs_subst(&self) -> bool

fn has_closure_types(&self) -> bool

fn has_erasable_regions(&self) -> bool

fn is_global(&self) -> bool

Indicates whether this value references only 'global' types/lifetimes that are the same regardless of what fn we are in. This is used for caching. Errs on the side of returning false.

impl<'tcx> Debug for Substs<'tcx>

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

Formats the value using the given formatter.

Derived Implementations

impl<'tcx> Hash for Substs<'tcx>

fn hash<__H: Hasher>(&self, __arg_0: &mut __H)

Feeds this value into the state given, updating the hasher as necessary.

fn hash_slice<H>(data: &[Self], state: &mut H) where H: Hasher

Feeds a slice of this type into the state provided.

impl<'tcx> Eq for Substs<'tcx>

impl<'tcx> PartialEq for Substs<'tcx>

fn eq(&self, __arg_0: &Substs<'tcx>) -> bool

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

fn ne(&self, __arg_0: &Substs<'tcx>) -> bool

This method tests for !=.

impl<'tcx> Clone for Substs<'tcx>

fn clone(&self) -> Substs<'tcx>

Returns a copy of the value.

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

Performs copy-assignment from source.