Enum rustc_middle::traits::WellFormedLoc

pub enum WellFormedLoc {
    Ty(LocalDefId),
    Param {
        function: LocalDefId,
        param_idx: usize,
    },
}

The ‘location’ at which we try to perform HIR-based wf checking. This information is used to obtain an hir::Ty, which we can walk in order to obtain precise spans for any ‘nested’ types (e.g. Foo in Option<Foo>).

Variants

Ty(LocalDefId)

Use the type of the provided definition.

Param

Use the type of the parameter of the provided function. We cannot use hir::Param, since the function may not have a body (e.g. a trait method definition)

Fields

function: LocalDefId

The function to lookup the parameter in

param_idx: usize

The index of the parameter to use. Parameters are indexed from 0, with the return type being the last ‘parameter’

Trait Implementations

impl Clone for WellFormedLoc

fn clone(&self) -> WellFormedLoc

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for WellFormedLoc

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

Formats the value using the given formatter.

impl<__D: SpanDecoder> Decodable<__D> for WellFormedLoc

fn decode(__decoder: &mut __D) -> Self

impl<__E: SpanEncoder> Encodable<__E> for WellFormedLoc

fn encode(&self, __encoder: &mut __E)

impl EraseType for WellFormedLoc

type Result = [u8; 16]

impl Hash for WellFormedLoc

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<'__ctx> HashStable<StableHashingContext<'__ctx>> for WellFormedLoc

fn hash_stable( &self, __hcx: &mut StableHashingContext<'__ctx>, __hasher: &mut StableHasher, )

impl PartialEq for WellFormedLoc

fn eq(&self, other: &WellFormedLoc) -> bool

Tests for self and other values to be equal, and is used by ==.

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

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

impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for WellFormedLoc

fn try_fold_with<__F: FallibleTypeFolder<TyCtxt<'tcx>>>( self, __folder: &mut __F, ) -> Result<Self, __F::Error>

The entry point for folding. To fold a value t with a folder f call: t.try_fold_with(f).

fn fold_with<F>(self, folder: &mut F) -> Self

where F: TypeFolder<I>,

A convenient alternative to try_fold_with for use with infallible folders. Do not override this method, to ensure coherence with try_fold_with.

impl<'tcx> TypeVisitable<TyCtxt<'tcx>> for WellFormedLoc

fn visit_with<__V: TypeVisitor<TyCtxt<'tcx>>>( &self, __visitor: &mut __V, ) -> __V::Result

The entry point for visiting. To visit a value t with a visitor v call: t.visit_with(v).

impl Copy for WellFormedLoc

impl Eq for WellFormedLoc

impl StructuralPartialEq for WellFormedLoc

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:

• Ty: 4 bytes
• Param: 12 bytes