Struct rustc::traits::fulfill::FulfillProcessor

struct FulfillProcessor<'a, 'b: 'a, 'gcx: 'tcx, 'tcx: 'b> {
    selcx: &'a mut SelectionContext<'b, 'gcx, 'tcx>,
    register_region_obligations: bool,
}

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

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Fields

selcx: &'a mut SelectionContext<'b, 'gcx, 'tcx>

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

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register_region_obligations: bool

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

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Trait Implementations

impl<'a, 'b, 'gcx, 'tcx> ObligationProcessor for FulfillProcessor<'a, 'b, 'gcx, 'tcx>

type Obligation = PendingPredicateObligation<'tcx>

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

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type Error = FulfillmentErrorCode<'tcx>

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

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fn process_obligation(     &mut self,     pending_obligation: &mut Self::Obligation ) -> ProcessResult<Self::Obligation, Self::Error>

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

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Processes a predicate obligation and returns either:

• Changed(v) if the predicate is true, presuming that v are also true
• Unchanged if we don't have enough info to be sure
• Error(e) if the predicate does not hold

This is always inlined, despite its size, because it has a single callsite and it is called very frequently.

fn process_backedge<'c, I>(     &mut self,     cycle: I,     _marker: PhantomData<&'c PendingPredicateObligation<'tcx>> ) where     I: Clone + Iterator<Item = &'c PendingPredicateObligation<'tcx>>,

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

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

As we do the cycle check, we invoke this callback when we encounter an actual cycle. cycle is an iterator that starts at the start of the cycle in the stack and walks toward the top.