Type Alias CanonicalState

pub type CanonicalState<I, T> = Canonical<I, State<I, T>>;

Aliased Type

pub struct CanonicalState<I, T> {
    pub value: State<I, T>,
    pub max_universe: UniverseIndex,
    pub variables: <I as Interner>::CanonicalVarKinds,
}

Fields

value: State<I, T>

max_universe: UniverseIndex

variables: <I as Interner>::CanonicalVarKinds

Layout

Note: Encountered an error during type layout; the type failed to be normalized.

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

where I: Interner, V: Clone,

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

Returns a duplicate of the value.

const 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: Decoder, V: Decodable<__D>, <I as Interner>::CanonicalVarKinds: 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: Encoder, V: Encodable<__E>, <I as Interner>::CanonicalVarKinds: 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>::CanonicalVarKinds: 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 ==.

const 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> Copy for Canonical<I, V>

where I: Interner, V: Copy,

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

where I: Interner, V: Eq,