Struct rustc_pattern_analysis::usefulness::UsefulnessReport

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pub struct UsefulnessReport<'p, Cx: PatCx> {
    pub arm_usefulness: Vec<(MatchArm<'p, Cx>, Usefulness<'p, Cx>)>,
    pub non_exhaustiveness_witnesses: Vec<WitnessPat<Cx>>,
}
Expand description

The output of checking a match for exhaustiveness and arm usefulness.

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§arm_usefulness: Vec<(MatchArm<'p, Cx>, Usefulness<'p, Cx>)>

For each arm of the input, whether that arm is useful after the arms above it.

§non_exhaustiveness_witnesses: Vec<WitnessPat<Cx>>

If the match is exhaustive, this is empty. If not, this contains witnesses for the lack of exhaustiveness.

Auto Trait Implementations§

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impl<'p, Cx> DynSend for UsefulnessReport<'p, Cx>
where <Cx as PatCx>::ArmData: DynSend, <Cx as PatCx>::PatData: DynSync, <Cx as PatCx>::StrLit: DynSend + DynSync, <Cx as PatCx>::Ty: DynSend + DynSync, <Cx as PatCx>::VariantIdx: DynSend + DynSync,

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impl<'p, Cx> DynSync for UsefulnessReport<'p, Cx>
where <Cx as PatCx>::ArmData: DynSync, <Cx as PatCx>::PatData: DynSync, <Cx as PatCx>::StrLit: DynSync, <Cx as PatCx>::Ty: DynSync, <Cx as PatCx>::VariantIdx: DynSync,

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impl<'p, Cx> Freeze for UsefulnessReport<'p, Cx>

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impl<'p, Cx> RefUnwindSafe for UsefulnessReport<'p, Cx>
where <Cx as PatCx>::ArmData: RefUnwindSafe, <Cx as PatCx>::PatData: RefUnwindSafe, <Cx as PatCx>::StrLit: RefUnwindSafe, <Cx as PatCx>::Ty: RefUnwindSafe, <Cx as PatCx>::VariantIdx: RefUnwindSafe,

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impl<'p, Cx> Send for UsefulnessReport<'p, Cx>
where <Cx as PatCx>::ArmData: Send, <Cx as PatCx>::PatData: Sync, <Cx as PatCx>::StrLit: Sync + Send, <Cx as PatCx>::Ty: Sync + Send, <Cx as PatCx>::VariantIdx: Sync + Send,

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impl<'p, Cx> Sync for UsefulnessReport<'p, Cx>
where <Cx as PatCx>::ArmData: Sync, <Cx as PatCx>::PatData: Sync, <Cx as PatCx>::StrLit: Sync, <Cx as PatCx>::Ty: Sync, <Cx as PatCx>::VariantIdx: Sync,

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impl<'p, Cx> Unpin for UsefulnessReport<'p, Cx>
where <Cx as PatCx>::ArmData: Unpin, <Cx as PatCx>::StrLit: Unpin, <Cx as PatCx>::Ty: Unpin, <Cx as PatCx>::VariantIdx: Unpin,

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impl<'p, Cx> UnwindSafe for UsefulnessReport<'p, Cx>
where <Cx as PatCx>::ArmData: UnwindSafe, <Cx as PatCx>::PatData: RefUnwindSafe, <Cx as PatCx>::StrLit: UnwindSafe + RefUnwindSafe, <Cx as PatCx>::Ty: UnwindSafe + RefUnwindSafe, <Cx as PatCx>::VariantIdx: UnwindSafe + RefUnwindSafe,

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Size: 48 bytes