Struct rustc_trait_selection::traits::ObligationCause

source ·

pub struct ObligationCause<'tcx> {
    pub span: Span,
    pub body_id: LocalDefId,
    code: InternedObligationCauseCode<'tcx>,
}

Expand description

The reason why we incurred this obligation; used for error reporting.

Non-misc ObligationCauseCodes are stored on the heap. This gives the best trade-off between keeping the type small (which makes copies cheaper) while not doing too many heap allocations.

We do not want to intern this as there are a lot of obligation causes which only live for a short period of time.

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§span: Span§body_id: LocalDefId

The ID of the fn body that triggered this obligation. This is used for region obligations to determine the precise environment in which the region obligation should be evaluated (in particular, closures can add new assumptions). See the field region_obligations of the FulfillmentContext for more information.

§code: InternedObligationCauseCode<'tcx>

Auto Trait Implementations§

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Struct rustc_trait_selection::traits::ObligationCause

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Auto Trait Implementations§

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

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

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

impl<'tcx> Unpin for ObligationCause<'tcx>

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

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