Struct rustc_trait_selection::traits::ObligationCause[−][src]

pub struct ObligationCause<'tcx> {
    data: Option<Rc<ObligationCauseData<'tcx>>>,
}
Expand description

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

As the happy path does not care about this struct, storing this on the heap ends up increasing performance.

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

Fields

data: Option<Rc<ObligationCauseData<'tcx>>>
Expand description

None for ObligationCause::dummy, Some otherwise.

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 T where
    T: 'static + ?Sized, [src]

pub fn type_id(&self) -> TypeId[src]

Gets the TypeId of self. Read more

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

pub fn borrow(&self) -> &T[src]

Immutably borrows from an owned value. Read more

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

pub fn borrow_mut(&mut self) -> &mut T[src]

Mutably borrows from an owned value. Read more

impl<T> From<T> for T[src]

pub fn from(t: T) -> T[src]

Performs the conversion.

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

pub fn into(self) -> U[src]

Performs the conversion.

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

type Owned = T

The resulting type after obtaining ownership.

pub fn to_owned(&self) -> T[src]

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

pub fn clone_into(&self, target: &mut T)[src]

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

recently added

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

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

type Error = Infallible

The type returned in the event of a conversion error.

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

Performs the conversion.

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

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

The type returned in the event of a conversion error.

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

Performs the conversion.

impl<T> WithConstness for T[src]

fn with_constness(self, constness: Constness) -> ConstnessAnd<Self>[src]

fn with_const(self) -> ConstnessAnd<Self>[src]

fn without_const(self) -> ConstnessAnd<Self>[src]