Enum rustc_trait_selection::traits::SelectionError

source ·

pub enum SelectionError<'tcx> {
    Unimplemented,
    OutputTypeParameterMismatch(Binder<'tcx, TraitRef<'tcx>>, Binder<'tcx, TraitRef<'tcx>>, TypeError<'tcx>),
    TraitNotObjectSafe(DefId),
    NotConstEvaluatable(NotConstEvaluatable),
    Overflow(OverflowError),
    ErrorReporting,
    Ambiguous(Vec<DefId, Global>),
}

Variants

`Unimplemented`

The trait is not implemented.

`OutputTypeParameterMismatch(Binder<'tcx, TraitRef<'tcx>>, Binder<'tcx, TraitRef<'tcx>>, TypeError<'tcx>)`

After a closure impl has selected, its “outputs” were evaluated (which for closures includes the “input” type params) and they didn’t resolve. See confirm_poly_trait_refs for more.

`TraitNotObjectSafe(DefId)`

The trait pointed by DefId is not object safe.

`NotConstEvaluatable(NotConstEvaluatable)`

A given constant couldn’t be evaluated.

`Overflow(OverflowError)`

Exceeded the recursion depth during type projection.

`ErrorReporting`

Signaling that an error has already been emitted, to avoid multiple errors being shown.

`Ambiguous(Vec<DefId, Global>)`

Multiple applicable impls where found. The DefIds correspond to all the impls’ Items.

Auto Trait Implementations

impl<'tcx> !RefUnwindSafe for SelectionError<'tcx>

impl<'tcx> Send for SelectionError<'tcx>

impl<'tcx> Sync for SelectionError<'tcx>

impl<'tcx> Unpin for SelectionError<'tcx>

impl<'tcx> !UnwindSafe for SelectionError<'tcx>

Blanket Implementations

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impl<T> Any for Twhere
T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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impl<T> Borrow<T> for Twhere
T: ?Sized,

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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impl<T> BorrowMut<T> for Twhere
T: ?Sized,

const: unstable · source

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into for Twhere
U: From<T>,

const: unstable · source

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<'tcx, T> IsSuggestable<'tcx> for Twhere
T: TypeVisitable<'tcx>,

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fn is_suggestable(self, tcx: TyCtxt<'tcx>, infer_suggestable: bool) -> bool

Whether this makes sense to suggest in a diagnostic. Read more

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impl<T> ToOwned for Twhere
T: Clone,

type Owned = T

The resulting type after obtaining ownership.

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fn to_owned(&self) -> T

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

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fn clone_into(&self, target: &mut T)

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

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impl<T, U> TryFrom for Twhere
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>

Performs the conversion.

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impl<T, U> TryInto for Twhere
U: TryFrom<T>,

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source

fn try_into(self) -> Result<U, >::Error>

Performs the conversion.

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: 80 bytes

Size for each variant:

Unimplemented: 0 bytes
OutputTypeParameterMismatch: 80 bytes
TraitNotObjectSafe: 8 bytes
NotConstEvaluatable: 1 byte
Overflow: 1 byte
ErrorReporting: 0 bytes
Ambiguous: 24 bytes

Enum rustc_trait_selection::traits::SelectionError

Variants

`Unimplemented`

`OutputTypeParameterMismatch(Binder<'tcx, TraitRef<'tcx>>, Binder<'tcx, TraitRef<'tcx>>, TypeError<'tcx>)`

`TraitNotObjectSafe(DefId)`

`NotConstEvaluatable(NotConstEvaluatable)`

`Overflow(OverflowError)`

`ErrorReporting`

`Ambiguous(Vec<DefId, Global>)`

Auto Trait Implementations

impl<'tcx> !RefUnwindSafe for SelectionError<'tcx>

impl<'tcx> Send for SelectionError<'tcx>

impl<'tcx> Sync for SelectionError<'tcx>

impl<'tcx> Unpin for SelectionError<'tcx>

impl<'tcx> !UnwindSafe for SelectionError<'tcx>

Blanket Implementations

impl<T> Any for Twhere
T: 'static + ?Sized,

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for Twhere
T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for Twhere
T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

impl<T> From<T> for T

fn from(t: T) -> T

impl<T, U> Into<U> for Twhere
U: From<T>,

fn into(self) -> U

impl<'tcx, T> IsSuggestable<'tcx> for Twhere
T: TypeVisitable<'tcx>,

fn is_suggestable(self, tcx: TyCtxt<'tcx>, infer_suggestable: bool) -> bool

impl<T> ToOwned for Twhere
T: Clone,

type Owned = T

fn to_owned(&self) -> T

fn clone_into(&self, target: &mut T)

impl<T, U> TryFrom<U> for Twhere
U: Into<T>,

type Error = Infallible

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for Twhere
U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Layout

Enum rustc_trait_selection::traits::SelectionError

Variants

Unimplemented

OutputTypeParameterMismatch(Binder<'tcx, TraitRef<'tcx>>, Binder<'tcx, TraitRef<'tcx>>, TypeError<'tcx>)

TraitNotObjectSafe(DefId)

NotConstEvaluatable(NotConstEvaluatable)

Overflow(OverflowError)

ErrorReporting

Ambiguous(Vec<DefId, Global>)

Auto Trait Implementations

impl<'tcx> !RefUnwindSafe for SelectionError<'tcx>

impl<'tcx> Send for SelectionError<'tcx>

impl<'tcx> Sync for SelectionError<'tcx>

impl<'tcx> Unpin for SelectionError<'tcx>

impl<'tcx> !UnwindSafe for SelectionError<'tcx>

Blanket Implementations

impl<T> Any for Twhere T: 'static + ?Sized,

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for Twhere T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for Twhere T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

impl<T> From<T> for T

fn from(t: T) -> T

impl<T, U> Into<U> for Twhere U: From<T>,

fn into(self) -> U

impl<'tcx, T> IsSuggestable<'tcx> for Twhere T: TypeVisitable<'tcx>,

fn is_suggestable(self, tcx: TyCtxt<'tcx>, infer_suggestable: bool) -> bool

impl<T> ToOwned for Twhere T: Clone,

type Owned = T

fn to_owned(&self) -> T

fn clone_into(&self, target: &mut T)

impl<T, U> TryFrom<U> for Twhere U: Into<T>,

type Error = Infallible

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Layout

`Unimplemented`

`OutputTypeParameterMismatch(Binder<'tcx, TraitRef<'tcx>>, Binder<'tcx, TraitRef<'tcx>>, TypeError<'tcx>)`

`TraitNotObjectSafe(DefId)`

`NotConstEvaluatable(NotConstEvaluatable)`

`Overflow(OverflowError)`

`ErrorReporting`

`Ambiguous(Vec<DefId, Global>)`

impl<T> Any for Twhere
T: 'static + ?Sized,

impl<T> Borrow<T> for Twhere
T: ?Sized,

impl<T> BorrowMut<T> for Twhere
T: ?Sized,

impl<T, U> Into<U> for Twhere
U: From<T>,

impl<'tcx, T> IsSuggestable<'tcx> for Twhere
T: TypeVisitable<'tcx>,

impl<T> ToOwned for Twhere
T: Clone,

impl<T, U> TryFrom<U> for Twhere
U: Into<T>,

impl<T, U> TryInto<U> for Twhere
U: TryFrom<T>,