Type Alias CanonicalResponse

pub type CanonicalResponse<'tcx> = Canonical<TyCtxt<'tcx>, Response<TyCtxt<'tcx>>>;

Aliased Type

struct CanonicalResponse<'tcx> {
    pub value: Response<TyCtxt<'tcx>>,
    pub max_universe: UniverseIndex,
    pub variables: &'tcx RawList<(), CanonicalVarInfo<TyCtxt<'tcx>>>,
}

Fields

value: Response<TyCtxt<'tcx>>

max_universe: UniverseIndex

variables: &'tcx RawList<(), CanonicalVarInfo<TyCtxt<'tcx>>>

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: 40 bytes

Implementations

impl<I, V> Canonical<I, V>

where I: Interner,

pub fn unchecked_map<W>(self, map_op: impl FnOnce(V) -> W) -> Canonical<I, W>

Allows you to map the value of a canonical while keeping the same set of bound variables.

WARNING: This function is very easy to mis-use, hence the name! In particular, the new value W must use all the same type/region variables in precisely the same order as the original! (The ordering is defined by the TypeFoldable implementation of the type in question.)

An example of a correct use of this:

let a: Canonical<I, T> = ...;
let b: Canonical<I, (T,)> = a.unchecked_map(|v| (v, ));

An example of an incorrect use of this:

let a: Canonical<I, T> = ...;
let ty: Ty<I> = ...;
let b: Canonical<I, (T, Ty<I>)> = a.unchecked_map(|v| (v, ty));

Trait Implementations

impl<'tcx, V> CanonicalExt<'tcx, V> for Canonical<TyCtxt<'tcx>, V>

fn instantiate( &self, tcx: TyCtxt<'tcx>, var_values: &CanonicalVarValues<TyCtxt<'tcx>>, ) -> V

where V: TypeFoldable<TyCtxt<'tcx>>,

Instantiate the wrapped value, replacing each canonical value with the value given in var_values.

fn instantiate_projected<T>( &self, tcx: TyCtxt<'tcx>, var_values: &CanonicalVarValues<TyCtxt<'tcx>>, projection_fn: impl FnOnce(&V) -> T, ) -> T

where T: TypeFoldable<TyCtxt<'tcx>>,

Allows one to apply a instantiation to some subset of self.value. Invoke projection_fn with self.value to get a value V that is expressed in terms of the same canonical variables bound in self (usually this extracts from subset of self). Apply the instantiation var_values to this value V, replacing each of the canonical variables.

impl<I, V> Clone for Canonical<I, V>

where I: Interner, V: Clone,

fn clone(&self) -> Canonical<I, V>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<I, V> Debug for Canonical<I, V>

where I: Interner, V: Debug,

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

Formats the value using the given formatter.

impl<I, V, __D> Decodable<__D> for Canonical<I, V>

where I: Interner, __D: TyDecoder<I = I>, V: Decodable<__D>, <I as Interner>::CanonicalVars: Decodable<__D>,

fn decode(__decoder: &mut __D) -> Canonical<I, V>

impl<I, V> Display for Canonical<I, V>

where I: Interner, V: Display,

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

Formats the value using the given formatter.

impl<I, V, __E> Encodable<__E> for Canonical<I, V>

where I: Interner, __E: TyEncoder<I = I>, V: Encodable<__E>, <I as Interner>::CanonicalVars: Encodable<__E>,

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

impl<I, V> Hash for Canonical<I, V>

where I: Interner, V: Hash,

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

where __H: Hasher,

Feeds this value into the given Hasher.

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

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<I, V, __CTX> HashStable<__CTX> for Canonical<I, V>

where I: Interner, V: HashStable<__CTX>, <I as Interner>::CanonicalVars: HashStable<__CTX>,

fn hash_stable( &self, __hcx: &mut __CTX, __hasher: &mut StableHasher<SipHasher128>, )

impl<I, V> PartialEq for Canonical<I, V>

where I: Interner, V: PartialEq,

fn eq(&self, __other: &Canonical<I, V>) -> bool

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<I, V> TypeFoldable<I> for Canonical<I, V>

where I: Interner, V: TypeFoldable<I>, <I as Interner>::CanonicalVars: TypeFoldable<I>,

fn try_fold_with<__F>( self, __folder: &mut __F, ) -> Result<Canonical<I, V>, <__F as FallibleTypeFolder<I>>::Error>

where __F: FallibleTypeFolder<I>,

The entry point for folding. To fold a value t with a folder f call: t.try_fold_with(f).

fn fold_with<F>(self, folder: &mut F) -> Self

where F: TypeFolder<I>,

A convenient alternative to try_fold_with for use with infallible folders. Do not override this method, to ensure coherence with try_fold_with.

impl<I, V> TypeVisitable<I> for Canonical<I, V>

where I: Interner, V: TypeVisitable<I>, <I as Interner>::CanonicalVars: TypeVisitable<I>,

fn visit_with<__V>( &self, __visitor: &mut __V, ) -> <__V as TypeVisitor<I>>::Result

where __V: TypeVisitor<I>,

The entry point for visiting. To visit a value t with a visitor v call: t.visit_with(v).

impl<I, V> Copy for Canonical<I, V>

where I: Interner, V: Copy,

impl<I, V> Eq for Canonical<I, V>

where I: Interner, V: Eq,