pub struct FreeRegionMap<'tcx> {
    pub(crate) relation: TransitiveRelation<Region<'tcx>>,
}

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§relation: TransitiveRelation<Region<'tcx>>

Stores the relation a < b, where a and b are regions.

Invariant: only free regions like 'x or 'static are stored in this relation, not scopes.

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impl<'tcx> FreeRegionMap<'tcx>

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pub fn elements(&self) -> impl Iterator<Item = Region<'tcx>> + '_

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pub fn is_empty(&self) -> bool

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pub fn sub_free_regions( &self, tcx: TyCtxt<'tcx>, r_a: Region<'tcx>, r_b: Region<'tcx> ) -> bool

Tests whether r_a <= r_b.

Both regions must meet is_free_or_static.

Subtle: one tricky case that this code gets correct is as follows. If we know that r_b: 'static, then this function will return true, even though we don’t know anything that directly relates r_a and r_b.

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fn check_relation(&self, r_a: Region<'tcx>, r_b: Region<'tcx>) -> bool

Check whether r_a <= r_b is found in the relation.

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pub fn lub_free_regions( &self, tcx: TyCtxt<'tcx>, r_a: Region<'tcx>, r_b: Region<'tcx> ) -> Region<'tcx>

Computes the least-upper-bound of two free regions. In some cases, this is more conservative than necessary, in order to avoid making arbitrary choices. See TransitiveRelation::postdom_upper_bound for more details.

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impl<'tcx> Clone for FreeRegionMap<'tcx>

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fn clone(&self) -> FreeRegionMap<'tcx>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<'tcx> Debug for FreeRegionMap<'tcx>

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl<'tcx> RefUnwindSafe for FreeRegionMap<'tcx>

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impl<'tcx> Send for FreeRegionMap<'tcx>

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impl<'tcx> Sync for FreeRegionMap<'tcx>

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impl<'tcx> Unpin for FreeRegionMap<'tcx>

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impl<'tcx> UnwindSafe for FreeRegionMap<'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> ToOwned for Twhere T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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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: 128 bytes