Enum rustc_middle::infer::unify_key::EffectVarValue

pub enum EffectVarValue<'tcx> {
    Host,
    NoHost,
    Const(Const<'tcx>),
}

values for the effect inference variable

Variants

Host

The host effect is on, enabling access to syscalls, filesystem access, etc.

NoHost

The host effect is off. Execution is restricted to const operations only.

Const(Const<'tcx>)

Implementations

impl<'tcx> EffectVarValue<'tcx>

pub fn as_const(self, tcx: TyCtxt<'tcx>) -> Const<'tcx>

Trait Implementations

impl<'tcx> Clone for EffectVarValue<'tcx>

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

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'tcx> Debug for EffectVarValue<'tcx>

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

Formats the value using the given formatter.

impl<'tcx> UnifyValue for EffectVarValue<'tcx>

type Error = (EffectVarValue<'tcx>, EffectVarValue<'tcx>)

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 EffectVarValue<'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: 16 bytes

Size for each variant:

• Host: 0 bytes
• NoHost: 0 bytes
• Const: 8 bytes