Struct rustc_mir_build::thir::pattern::usefulness::MatchCheckCtxt [−][src]
Fields
tcx: TyCtxt<'tcx>
module: DefId
The module in which the match occurs. This is necessary for
checking inhabited-ness of types because whether a type is (visibly)
inhabited can depend on whether it was defined in the current module or
not. E.g., struct Foo { _private: ! }
cannot be seen to be empty
outside its module and should not be matchable with an empty match statement.
param_env: ParamEnv<'tcx>
pattern_arena: &'a TypedArena<Pat<'tcx>>
Implementations
impl<'a, 'tcx> MatchCheckCtxt<'a, 'tcx>
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pub(super) fn is_uninhabited(&self, ty: Ty<'tcx>) -> bool
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pub(super) fn is_foreign_non_exhaustive_enum(&self, ty: Ty<'tcx>) -> bool
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Returns whether the given type is an enum from another crate declared #[non_exhaustive]
.
Auto Trait Implementations
impl<'a, 'tcx> !RefUnwindSafe for MatchCheckCtxt<'a, 'tcx>
impl<'a, 'tcx> !Send for MatchCheckCtxt<'a, 'tcx>
impl<'a, 'tcx> !Sync for MatchCheckCtxt<'a, 'tcx>
impl<'a, 'tcx> Unpin for MatchCheckCtxt<'a, 'tcx> where
'tcx: 'a,
'tcx: 'a,
impl<'a, 'tcx> !UnwindSafe for MatchCheckCtxt<'a, 'tcx>
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
pub fn borrow_mut(&mut self) -> &mut T
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impl<'a, T> Captures<'a> for T where
T: ?Sized,
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T: ?Sized,
impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,