[][src]Enum rustc::ty::Predicate

pub enum Predicate<'tcx> {
    Trait(PolyTraitPredicate<'tcx>),
    RegionOutlives(PolyRegionOutlivesPredicate<'tcx>),
    TypeOutlives(PolyTypeOutlivesPredicate<'tcx>),
    Projection(PolyProjectionPredicate<'tcx>),
    WellFormed(Ty<'tcx>),
    ObjectSafe(DefId),
    ClosureKind(DefIdClosureSubsts<'tcx>, ClosureKind),
    Subtype(PolySubtypePredicate<'tcx>),
    ConstEvaluatable(DefId, &'tcx Substs<'tcx>),
}
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Variants

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Corresponds to where Foo : Bar<A,B,C>. Foo here would be the Self type of the trait reference and A, B, and C would be the type parameters.

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where 'a : 'b

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where T : 'a

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where ::Name == X, approximately. See ProjectionPredicate struct for details.

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no syntax: T WF

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trait must be object-safe

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No direct syntax. May be thought of as where T : FnFoo<...> for some substitutions ... and T being a closure type. Satisfied (or refuted) once we know the closure's kind.

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T1 <: T2

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Constant initializer must evaluate successfully.

Methods

impl<'a, 'gcx, 'tcx> Predicate<'tcx>
[src]

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Performs a substitution suitable for going from a poly-trait-ref to supertraits that must hold if that poly-trait-ref holds. This is slightly different from a normal substitution in terms of what happens with bound regions. See lengthy comment below for details.

impl<'tcx> Predicate<'tcx>
[src]

Important traits for IntoIter<T>

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Iterates over the types in this predicate. Note that in all cases this is skipping over a binder, so late-bound regions with depth 0 are bound by the predicate.

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Trait Implementations

impl<'a, 'gcx> HashStable<StableHashingContext<'a>> for Predicate<'gcx>
[src]

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impl<'gcx, 'tcx> Normalizable<'gcx, 'tcx> for Predicate<'tcx> where
    'gcx: 'tcx, 
[src]

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Convert from the 'gcx (lifted) form of Self into the tcx form of Self. Read more

impl<'tcx> EncodableWithShorthand for Predicate<'tcx>
[src]

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impl<'a, 'tcx> Lift<'tcx> for Predicate<'a>
[src]

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impl<'tcx> TypeFoldable<'tcx> for Predicate<'tcx>
[src]

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True if self has any late-bound regions that are either bound by binder or bound by some binder outside of binder. If binder is ty::INNERMOST, this indicates whether there are any late-bound regions that appear free. Read more

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True if this self has any regions that escape binder (and hence are not bound by it). Read more

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"Free" regions in this context means that it has any region that is not (a) erased or (b) late-bound. Read more

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True if there any any un-erased free regions.

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Indicates whether this value references only 'global' types/lifetimes that are the same regardless of what fn we are in. This is used for caching. Read more

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True if there are any late-bound regions

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A visitor that does not recurse into types, works like fn walk_shallow in Ty.

impl<'tcx> Clone for Predicate<'tcx>
[src]

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

impl<'tcx> Copy for Predicate<'tcx>
[src]

impl<'tcx> PartialEq for Predicate<'tcx>
[src]

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

This method tests for !=.

impl<'tcx> Eq for Predicate<'tcx>
[src]

impl<'tcx> Hash for Predicate<'tcx>
[src]

Feeds this value into the given [Hasher]. Read more

Feeds a slice of this type into the given [Hasher]. Read more

impl<'tcx> Encodable for Predicate<'tcx>
[src]

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impl<'tcx> Decodable for Predicate<'tcx>
[src]

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impl<'tcx> AsRef<Predicate<'tcx>> for Predicate<'tcx>
[src]

Performs the conversion.

impl<'tcx> Print for Predicate<'tcx>
[src]

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

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impl<'tcx> Display for Predicate<'tcx>
[src]

Formats the value using the given formatter. Read more

impl<'tcx> Debug for Predicate<'tcx>
[src]

Formats the value using the given formatter. Read more

Auto Trait Implementations

impl<'tcx> !Send for Predicate<'tcx>

impl<'tcx> !Sync for Predicate<'tcx>

Blanket Implementations

impl<T> MaybeResult for T
[src]

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impl<'tcx, T> Subst for T where
    T: TypeFoldable<'tcx>, 
[src]

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impl<'a, T> Captures for T where
    T: ?Sized
[src]

impl<T> ToOwned for T where
    T: Clone
[src]

Creates owned data from borrowed data, usually by cloning. Read more

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recently added

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T> From for T
[src]

Performs the conversion.

impl<T> ToString for T where
    T: Display + ?Sized
[src]

Converts the given value to a String. Read more

impl<T, U> Into for T where
    U: From<T>, 
[src]

Performs the conversion.

impl<T, U> TryFrom for T where
    T: From<U>, 
[src]

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The type returned in the event of a conversion error.

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Performs the conversion.

impl<T> Borrow for T where
    T: ?Sized
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Important traits for &'a mut R

Immutably borrows from an owned value. Read more

impl<T, U> TryInto for T where
    U: TryFrom<T>, 
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The type returned in the event of a conversion error.

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Performs the conversion.

impl<T> BorrowMut for T where
    T: ?Sized
[src]

Important traits for &'a mut R

Mutably borrows from an owned value. Read more

impl<T> Any for T where
    T: 'static + ?Sized
[src]

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this method will likely be replaced by an associated static

Gets the TypeId of self. Read more

impl<T> Encodable for T where
    T: UseSpecializedEncodable + ?Sized
[src]

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impl<T> Decodable for T where
    T: UseSpecializedDecodable
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impl<E> SpecializationError for E
[src]

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Create an error for a missing method specialization. Defaults to panicking with type, trait & method names. S is the encoder/decoder state type, T is the type being encoded/decoded, and the arguments are the names of the trait and method that should've been overridden. Read more

impl<T> Erased for T
[src]

impl<T> Send for T where
    T: ?Sized
[src]

impl<T> Sync for T where
    T: ?Sized
[src]

impl<T> Erased for T