pub enum CanonicalizeMode {
    Input,
    Response {
        max_input_universe: UniverseIndex,
    },
}
Expand description

Whether we’re canonicalizing a query input or the query response.

When canonicalizing an input we’re in the context of the caller while canonicalizing the response happens in the context of the query.

Variants§

§

Input

§

Response

Fields

§max_input_universe: UniverseIndex

The highest universe nameable by the caller.

All variables in a universe nameable by the caller get mapped to the root universe in the response and then mapped back to their correct universe when applying the query response in the context of the caller.

This doesn’t work for universes created inside of the query so we do remember their universe in the response.

FIXME: We currently return region constraints referring to placeholders and inference variables from a binder instantiated inside of the query.

In the long term we should eagerly deal with these constraints inside of the query and only propagate constraints which are actually nameable by the caller.

Trait Implementations§

source§

impl Clone for CanonicalizeMode

source§

fn clone(&self) -> CanonicalizeMode

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 CanonicalizeMode

source§

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

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

impl Copy for CanonicalizeMode

Auto Trait Implementations§

Blanket Implementations§

source§

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

source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
source§

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

source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
source§

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

source§

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

Mutably borrows from an owned value. Read more
source§

impl<T> From<T> for T

source§

fn from(t: T) -> T

Returns the argument unchanged.

source§

impl<T, U> Into<U> for Twhere 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<T> ToOwned for Twhere 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<T, U> TryFrom<U> for Twhere 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 Twhere 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.

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: 4 bytes

Size for each variant:

  • Input: 0 bytes
  • Response: 4 bytes