Struct rustc_infer::infer::combine::ConstInferUnifier

struct ConstInferUnifier<'cx, 'tcx> {
    infcx: &'cx InferCtxt<'cx, 'tcx>,
    span: Span,
    param_env: ParamEnv<'tcx>,
    for_universe: UniverseIndex,
    target_vid: ConstVid<'tcx>,
}

Fields

infcx: &'cx InferCtxt<'cx, 'tcx>

span: Span

param_env: ParamEnv<'tcx>

for_universe: UniverseIndex

target_vid: ConstVid<'tcx>

The vid of the const variable that is in the process of being instantiated; if we find this within the const we are folding, that means we would have created a cyclic const.

Trait Implementations

impl<'tcx> TypeRelation<'tcx> for ConstInferUnifier<'_, 'tcx>

fn tcx(&self) -> TyCtxt<'tcx>

fn param_env(&self) -> ParamEnv<'tcx>

fn tag(&self) -> &'static str

Returns a static string we can use for printouts.

fn a_is_expected(&self) -> bool

Returns true if the value a is the “expected” type in the relation. Just affects error messages.

fn relate_with_variance<T: Relate<'tcx>>(
    &mut self,
    _variance: Variance,
    _info: VarianceDiagInfo<'tcx>,
    a: T,
    b: T
) -> RelateResult<'tcx, T>

Switch variance for the purpose of relating a and b.

fn binders<T>(
    &mut self,
    a: Binder<'tcx, T>,
    b: Binder<'tcx, T>
) -> RelateResult<'tcx, Binder<'tcx, T>>where
    T: Relate<'tcx>,

fn tys(&mut self, t: Ty<'tcx>, _t: Ty<'tcx>) -> RelateResult<'tcx, Ty<'tcx>>

fn regions(
    &mut self,
    r: Region<'tcx>,
    _r: Region<'tcx>
) -> RelateResult<'tcx, Region<'tcx>>

fn consts(
    &mut self,
    c: Const<'tcx>,
    _c: Const<'tcx>
) -> RelateResult<'tcx, Const<'tcx>>

fn with_cause<F, R>(&mut self, _cause: Cause, f: F) -> Rwhere
    F: FnOnce(&mut Self) -> R,

fn relate<T>(&mut self, a: T, b: T) -> Result<T, TypeError<'tcx>>where
    T: Relate<'tcx>,

Generic relation routine suitable for most anything.

fn relate_item_substs(
    &mut self,
    item_def_id: DefId,
    a_subst: &'tcx List<GenericArg<'tcx>>,
    b_subst: &'tcx List<GenericArg<'tcx>>
) -> Result<&'tcx List<GenericArg<'tcx>>, TypeError<'tcx>>

Relate the two substitutions for the given item. The default is to look up the variance for the item and proceed accordingly.

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: 32 bytes