Enum rustc_middle::infer::unify_key::ConstVariableValue

pub enum ConstVariableValue<'tcx> {
    Known {
        value: Const<'tcx>,
    },
    Unknown {
        origin: ConstVariableOrigin,
        universe: UniverseIndex,
    },
}

Variants

Known

Fields

value: Const<'tcx>

Unknown

Fields

origin: ConstVariableOrigin

universe: UniverseIndex

Implementations

impl<'tcx> ConstVariableValue<'tcx>

pub fn known(&self) -> Option<Const<'tcx>>

If this value is known, returns the const it is known to be. Otherwise, None.

Trait Implementations

impl<'tcx> Clone for ConstVariableValue<'tcx>

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

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'tcx> Debug for ConstVariableValue<'tcx>

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

Formats the value using the given formatter.

impl<'tcx> UnifyValue for ConstVariableValue<'tcx>

type Error = NoError

Defines the type to return when merging of two values fails. If merging is infallible, use the special struct NoError found in this crate, which unlocks various more convenient methods on the unification table.

fn unify_values(value1: &Self, value2: &Self) -> Result<Self, Self::Error>

Given two values, produce a new value that combines them. If that is not possible, produce an error.

impl<'tcx> Copy for ConstVariableValue<'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: 24 bytes

Size for each variant:

• Known: 16 bytes
• Unknown: 24 bytes