Struct rustc_trait_selection::infer::canonical::ir::fast_reject::DeepRejectCtxt

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pub struct DeepRejectCtxt<I>
where
    I: Interner,
{
    treat_obligation_params: TreatParams,
    _interner: PhantomData<I>,
}
Expand description

Given generic arguments from an obligation and an impl, could these two be unified after replacing parameters in the the impl with inference variables.

For obligations, parameters won’t be replaced by inference variables and only unify with themselves. We treat them the same way we treat placeholders.

We also use this function during coherence. For coherence the impls only have to overlap for some value, so we treat parameters on both sides like inference variables. This behavior is toggled using the treat_obligation_params field.

Fields§

§treat_obligation_params: TreatParams§_interner: PhantomData<I>

Implementations§

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impl<I> DeepRejectCtxt<I>
where I: Interner,

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pub fn new( _interner: I, treat_obligation_params: TreatParams, ) -> DeepRejectCtxt<I>

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pub fn args_may_unify( self, obligation_args: <I as Interner>::GenericArgs, impl_args: <I as Interner>::GenericArgs, ) -> bool

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pub fn types_may_unify( self, obligation_ty: <I as Interner>::Ty, impl_ty: <I as Interner>::Ty, ) -> bool

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pub fn consts_may_unify( self, obligation_ct: <I as Interner>::Const, impl_ct: <I as Interner>::Const, ) -> bool

Trait Implementations§

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impl<I> Clone for DeepRejectCtxt<I>
where I: Clone + Interner,

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fn clone(&self) -> DeepRejectCtxt<I>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<I> Debug for DeepRejectCtxt<I>
where I: Debug + Interner,

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

Formats the value using the given formatter. Read more
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impl<I> Copy for DeepRejectCtxt<I>
where I: Copy + Interner,

Auto Trait Implementations§

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impl<I> DynSend for DeepRejectCtxt<I>
where I: DynSend,

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impl<I> DynSync for DeepRejectCtxt<I>
where I: DynSync,

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impl<I> Freeze for DeepRejectCtxt<I>

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impl<I> RefUnwindSafe for DeepRejectCtxt<I>
where I: RefUnwindSafe,

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impl<I> Send for DeepRejectCtxt<I>
where I: Send,

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impl<I> Sync for DeepRejectCtxt<I>
where I: Sync,

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impl<I> Unpin for DeepRejectCtxt<I>
where I: Unpin,

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impl<I> UnwindSafe for DeepRejectCtxt<I>
where I: UnwindSafe,

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impl<T> Aligned for T

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const ALIGN: Alignment = _

Alignment of Self.
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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for T
where T: Copy,

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fn allocate_on<'a>(self, arena: &'a Arena<'tcx>) -> &'a mut T

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fn allocate_from_iter<'a>( arena: &'a Arena<'tcx>, iter: impl IntoIterator<Item = T>, ) -> &'a mut [T]

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impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for T
where T: Copy,

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fn allocate_on<'a>(self, arena: &'a Arena<'tcx>) -> &'a mut T

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fn allocate_from_iter<'a>( arena: &'a Arena<'tcx>, iter: impl IntoIterator<Item = T>, ) -> &'a mut [T]

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

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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where T: ?Sized,

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

Mutably borrows from an owned value. Read more
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where T: Clone,

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default unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> CloneToUninit for T
where T: Copy,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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fn collect_and_apply<I, F>(iter: I, f: F) -> R
where I: Iterator<Item = T>, F: FnOnce(&[T]) -> R,

Equivalent to f(&iter.collect::<Vec<_>>()).

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type Output = R

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fn filterable( self, filter_name: &'static str, ) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>

Creates a filterable data provider with the given name for debugging. Read more
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fn from(t: T) -> T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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where U: From<T>,

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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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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_query_param(self) -> P

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type Error = !

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const ALIGN: usize = _

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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

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type Output = T

Should always be Self
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where T: Clone,

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The resulting type after obtaining ownership.
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Uses borrowed data to replace owned data, usually by cloning. Read more
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where U: Into<T>,

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

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default fn from_cycle_error( tcx: Tcx, cycle_error: &CycleError, _guar: ErrorGuaranteed, ) -> T

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where S: Into<Dispatch>,

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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: 1 byte