Struct rustc::infer::equate::Equate

pub struct Equate<'combine, 'infcx: 'combine, 'gcx: 'infcx + 'tcx, 'tcx: 'infcx> {
    fields: &'combine mut CombineFields<'infcx, 'gcx, 'tcx>,
    a_is_expected: bool,
}

🔬 This is a nightly-only experimental API. (rustc_private)

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Ensures a is made equal to b. Returns a on success.

Fields

fields: &'combine mut CombineFields<'infcx, 'gcx, 'tcx>

🔬 This is a nightly-only experimental API. (rustc_private)

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a_is_expected: bool

🔬 This is a nightly-only experimental API. (rustc_private)

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Methods

impl<'combine, 'infcx, 'gcx, 'tcx> Equate<'combine, 'infcx, 'gcx, 'tcx>

pub fn new(     fields: &'combine mut CombineFields<'infcx, 'gcx, 'tcx>,     a_is_expected: bool ) -> Equate<'combine, 'infcx, 'gcx, 'tcx>

🔬 This is a nightly-only experimental API. (rustc_private)

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Trait Implementations

impl<'combine, 'infcx, 'gcx, 'tcx> TypeRelation<'infcx, 'gcx, 'tcx> for Equate<'combine, 'infcx, 'gcx, 'tcx>

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

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Returns a static string we can use for printouts.

fn tcx(&self) -> TyCtxt<'infcx, 'gcx, 'tcx>

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fn a_is_expected(&self) -> bool

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

fn relate_item_substs(     &mut self,     _item_def_id: DefId,     a_subst: &'tcx Substs<'tcx>,     b_subst: &'tcx Substs<'tcx> ) -> RelateResult<'tcx, &'tcx Substs<'tcx>>

🔬 This is a nightly-only experimental API. (rustc_private)

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

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

🔬 This is a nightly-only experimental API. (rustc_private)

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Switch variance for the purpose of relating a and b.

fn tys(&mut self, a: Ty<'tcx>, b: Ty<'tcx>) -> RelateResult<'tcx, Ty<'tcx>>

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

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

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

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

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Generic relation routine suitable for most anything.