pub(crate) struct MatchCheckCtxt<'p, 'tcx> {
    pub(crate) tcx: TyCtxt<'tcx>,
    pub(crate) module: DefId,
    pub(crate) param_env: ParamEnv<'tcx>,
    pub(crate) pattern_arena: &'p TypedArena<DeconstructedPat<'p, 'tcx>>,
    pub(crate) refutable: bool,
}

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§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: &'p TypedArena<DeconstructedPat<'p, 'tcx>>§refutable: bool

Only produce NON_EXHAUSTIVE_OMITTED_PATTERNS lint on refutable patterns.

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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

Returns whether the given type is an enum from another crate declared #[non_exhaustive].

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impl<'p, 'tcx> !RefUnwindSafe for MatchCheckCtxt<'p, 'tcx>

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impl<'p, 'tcx> !Send for MatchCheckCtxt<'p, 'tcx>

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impl<'p, 'tcx> !Sync for MatchCheckCtxt<'p, 'tcx>

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impl<'p, 'tcx> Unpin for MatchCheckCtxt<'p, 'tcx>

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impl<'p, 'tcx> !UnwindSafe for MatchCheckCtxt<'p, 'tcx>

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impl<T> Any for Twhere T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere U: From<T>,

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fn into(self) -> U

Calls U::from(self).

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

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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.

Layout§

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.

Size: 40 bytes