Enum rustc_infer::traits::solve::inspect::ProbeKind

pub enum ProbeKind<'tcx> {
    Root {
        result: Result<Canonical<TyCtxt<'tcx>, Response<'tcx>>, NoSolution>,
    },
    TryNormalizeNonRigid {
        result: Result<Canonical<TyCtxt<'tcx>, Response<'tcx>>, NoSolution>,
    },
    NormalizedSelfTyAssembly,
    TraitCandidate {
        source: CandidateSource,
        result: Result<Canonical<TyCtxt<'tcx>, Response<'tcx>>, NoSolution>,
    },
    UnsizeAssembly,
    UpcastProjectionCompatibility,
    OpaqueTypeStorageLookup {
        result: Result<Canonical<TyCtxt<'tcx>, Response<'tcx>>, NoSolution>,
    },
}

What kind of probe we’re in. In case the probe represents a candidate, or the final result of the current goal - via ProbeKind::Root - we also store the QueryResult.

Variants

Root

The root inference context while proving a goal.

Fields

result: Result<Canonical<TyCtxt<'tcx>, Response<'tcx>>, NoSolution>

TryNormalizeNonRigid

Trying to normalize an alias by at least one step in NormalizesTo.

Fields

result: Result<Canonical<TyCtxt<'tcx>, Response<'tcx>>, NoSolution>

NormalizedSelfTyAssembly

Probe entered when normalizing the self ty during candidate assembly

TraitCandidate

A candidate for proving a trait or alias-relate goal.

Fields

source: CandidateSource

result: Result<Canonical<TyCtxt<'tcx>, Response<'tcx>>, NoSolution>

UnsizeAssembly

Used in the probe that wraps normalizing the non-self type for the unsize trait, which is also structurally matched on.

UpcastProjectionCompatibility

During upcasting from some source object to target object type, used to do a probe to find out what projection type(s) may be used to prove that the source type upholds all of the target type’s object bounds.

OpaqueTypeStorageLookup

Try to unify an opaque type with an existing key in the storage.

Fields

result: Result<Canonical<TyCtxt<'tcx>, Response<'tcx>>, NoSolution>

Trait Implementations

impl<'tcx> Clone for ProbeKind<'tcx>

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

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'tcx> Debug for ProbeKind<'tcx>

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

Formats the value using the given formatter.

impl<'tcx> PartialEq for ProbeKind<'tcx>

fn eq(&self, other: &ProbeKind<'tcx>) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<'tcx> Copy for ProbeKind<'tcx>

impl<'tcx> Eq for ProbeKind<'tcx>

impl<'tcx> StructuralPartialEq for ProbeKind<'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: 64 bytes

Size for each variant:

• Root: 56 bytes
• TryNormalizeNonRigid: 56 bytes
• NormalizedSelfTyAssembly: 0 bytes
• TraitCandidate: 64 bytes
• UnsizeAssembly: 0 bytes
• UpcastProjectionCompatibility: 0 bytes
• OpaqueTypeStorageLookup: 56 bytes