Struct rustc_trait_selection::infer::at::At

pub struct At<'a, 'tcx> {
    pub infcx: &'a InferCtxt<'tcx>,
    pub cause: &'a ObligationCause<'tcx>,
    pub param_env: ParamEnv<'tcx>,
    pub define_opaque_types: bool,
}

Fields

infcx: &'a InferCtxt<'tcx>

cause: &'a ObligationCause<'tcx>

param_env: ParamEnv<'tcx>

define_opaque_types: bool

Whether we should define opaque types or just treat them opaquely. Currently only used to prevent predicate matching from matching anything against opaque types.

Trait Implementations

impl<'tcx> NormalizeExt<'tcx> for At<'_, 'tcx>

fn normalize<T: TypeFoldable<'tcx>>(&self, value: T) -> InferOk<'tcx, T>

Normalize a value using the AssocTypeNormalizer.

impl<'cx, 'tcx> QueryNormalizeExt<'tcx> for At<'cx, 'tcx>

fn query_normalize<T>(&self, value: T) -> Result<Normalized<'tcx, T>, NoSolution>where
    T: TypeFoldable<'tcx>,

Normalize value in the context of the inference context, yielding a resulting type, or an error if value cannot be normalized. If you don’t care about regions, you should prefer normalize_erasing_regions, which is more efficient.

If the normalization succeeds and is unambiguous, returns back the normalized value along with various outlives relations (in the form of obligations that must be discharged).

N.B., this will eventually be the main means of normalizing, but for now should be used only when we actually know that normalization will succeed, since error reporting and other details are still “under development”.

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