rustc_trait_selection::infer::canonical::ir::fast_reject

Struct DeepRejectCtxt

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pub struct DeepRejectCtxt<I, const INSTANTIATE_LHS_WITH_INFER: bool, const INSTANTIATE_RHS_WITH_INFER: bool>
where
    I: Interner,
{
    _interner: PhantomData<I>,
}
Expand description

Given generic arguments, could they be unified after replacing parameters with inference variables or placeholders. This behavior is toggled using the const generics.

We use this to quickly reject impl/wc candidates without needing to instantiate generic arguments/having to enter a probe.

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.

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§_interner: PhantomData<I>

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

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pub fn relate_rigid_rigid(_interner: I) -> DeepRejectCtxt<I, false, false>

Treat parameters in both the lhs and the rhs as rigid.

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

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pub fn relate_infer_infer(_interner: I) -> DeepRejectCtxt<I, true, true>

Treat parameters in both the lhs and the rhs as infer vars.

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

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pub fn relate_rigid_infer(_interner: I) -> DeepRejectCtxt<I, false, true>

Treat parameters in the lhs as rigid, and in rhs as infer vars.

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impl<I, const INSTANTIATE_LHS_WITH_INFER: bool, const INSTANTIATE_RHS_WITH_INFER: bool> DeepRejectCtxt<I, INSTANTIATE_LHS_WITH_INFER, INSTANTIATE_RHS_WITH_INFER>
where I: Interner,

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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, lhs: <I as Interner>::Ty, rhs: <I as Interner>::Ty, ) -> bool

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

Trait Implementations§

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impl<I, const INSTANTIATE_LHS_WITH_INFER: bool, const INSTANTIATE_RHS_WITH_INFER: bool> Clone for DeepRejectCtxt<I, INSTANTIATE_LHS_WITH_INFER, INSTANTIATE_RHS_WITH_INFER>
where I: Clone + Interner,

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fn clone( &self, ) -> DeepRejectCtxt<I, INSTANTIATE_LHS_WITH_INFER, INSTANTIATE_RHS_WITH_INFER>

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, const INSTANTIATE_LHS_WITH_INFER: bool, const INSTANTIATE_RHS_WITH_INFER: bool> Debug for DeepRejectCtxt<I, INSTANTIATE_LHS_WITH_INFER, INSTANTIATE_RHS_WITH_INFER>
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, const INSTANTIATE_LHS_WITH_INFER: bool, const INSTANTIATE_RHS_WITH_INFER: bool> Copy for DeepRejectCtxt<I, INSTANTIATE_LHS_WITH_INFER, INSTANTIATE_RHS_WITH_INFER>
where I: Copy + Interner,

Auto Trait Implementations§

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impl<I, const INSTANTIATE_LHS_WITH_INFER: bool, const INSTANTIATE_RHS_WITH_INFER: bool> DynSend for DeepRejectCtxt<I, INSTANTIATE_LHS_WITH_INFER, INSTANTIATE_RHS_WITH_INFER>
where I: DynSend,

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impl<I, const INSTANTIATE_LHS_WITH_INFER: bool, const INSTANTIATE_RHS_WITH_INFER: bool> DynSync for DeepRejectCtxt<I, INSTANTIATE_LHS_WITH_INFER, INSTANTIATE_RHS_WITH_INFER>
where I: DynSync,

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impl<I, const INSTANTIATE_LHS_WITH_INFER: bool, const INSTANTIATE_RHS_WITH_INFER: bool> Freeze for DeepRejectCtxt<I, INSTANTIATE_LHS_WITH_INFER, INSTANTIATE_RHS_WITH_INFER>

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impl<I, const INSTANTIATE_LHS_WITH_INFER: bool, const INSTANTIATE_RHS_WITH_INFER: bool> RefUnwindSafe for DeepRejectCtxt<I, INSTANTIATE_LHS_WITH_INFER, INSTANTIATE_RHS_WITH_INFER>
where I: RefUnwindSafe,

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impl<I, const INSTANTIATE_LHS_WITH_INFER: bool, const INSTANTIATE_RHS_WITH_INFER: bool> Send for DeepRejectCtxt<I, INSTANTIATE_LHS_WITH_INFER, INSTANTIATE_RHS_WITH_INFER>
where I: Send,

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impl<I, const INSTANTIATE_LHS_WITH_INFER: bool, const INSTANTIATE_RHS_WITH_INFER: bool> Sync for DeepRejectCtxt<I, INSTANTIATE_LHS_WITH_INFER, INSTANTIATE_RHS_WITH_INFER>
where I: Sync,

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impl<I, const INSTANTIATE_LHS_WITH_INFER: bool, const INSTANTIATE_RHS_WITH_INFER: bool> Unpin for DeepRejectCtxt<I, INSTANTIATE_LHS_WITH_INFER, INSTANTIATE_RHS_WITH_INFER>
where I: Unpin,

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impl<I, const INSTANTIATE_LHS_WITH_INFER: bool, const INSTANTIATE_RHS_WITH_INFER: bool> UnwindSafe for DeepRejectCtxt<I, INSTANTIATE_LHS_WITH_INFER, INSTANTIATE_RHS_WITH_INFER>
where I: UnwindSafe,

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const ALIGN: Alignment = _

Alignment of Self.
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fn allocate_on(self, arena: &'tcx Arena<'tcx>) -> &'tcx mut T

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

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

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

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🔬This is a nightly-only experimental API. (clone_to_uninit)
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where I: Iterator<Item = T>, F: FnOnce(&[T]) -> R,

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type Output = R

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

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

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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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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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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.

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