Struct rustc_pattern_analysis::usefulness::UsefulnessCtxt

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struct UsefulnessCtxt<'a, 'p, Cx: PatCx> {
    tycx: &'a Cx,
    branch_usefulness: FxHashMap<PatId, BranchPatUsefulness<'p, Cx>>,
    complexity_limit: Option<usize>,
    complexity_level: usize,
}
Expand description

Context that provides information for usefulness checking.

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§tycx: &'a Cx

The context for type information.

§branch_usefulness: FxHashMap<PatId, BranchPatUsefulness<'p, Cx>>

Track information about the usefulness of branch patterns (see definition of “branch pattern” at BranchPatUsefulness).

§complexity_limit: Option<usize>§complexity_level: usize

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impl<'a, 'p, Cx: PatCx> UsefulnessCtxt<'a, 'p, Cx>

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fn increase_complexity_level( &mut self, complexity_add: usize, ) -> Result<(), Cx::Error>

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impl<'a, 'p, Cx> Freeze for UsefulnessCtxt<'a, 'p, Cx>

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

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impl<'a, 'p, Cx> Send for UsefulnessCtxt<'a, 'p, Cx>
where Cx: Sync, <Cx as PatCx>::Ty: Sync, <Cx as PatCx>::PatData: Sync, <Cx as PatCx>::VariantIdx: Sync, <Cx as PatCx>::StrLit: Sync,

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

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impl<'a, 'p, Cx> Unpin for UsefulnessCtxt<'a, 'p, Cx>

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impl<'a, 'p, Cx> UnwindSafe for UsefulnessCtxt<'a, 'p, Cx>
where Cx: RefUnwindSafe, <Cx as PatCx>::Ty: RefUnwindSafe, <Cx as PatCx>::PatData: RefUnwindSafe, <Cx as PatCx>::VariantIdx: RefUnwindSafe, <Cx as PatCx>::StrLit: RefUnwindSafe,

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Size: 64 bytes