# Struct rustc_mir_dataflow::framework::lattice::Dual

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    pub struct Dual<T>(pub T);

Expand description

The counterpart of a given semilattice `T` using the inverse order.

The dual of a join-semilattice is a meet-semilattice and vice versa. For example, the dual of a powerset has the empty set as its top element and the full set as its bottom element and uses set intersection as its join operator.

## Tuple Fields§

§`0: T`

## Trait Implementations§

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### impl<T: Idx> BitSetExt<T> for Dual<BitSet<T>>

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#### fn contains(&self, elem: T) -> bool

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#### fn union(&mut self, other: &HybridBitSet<T>)

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#### fn subtract(&mut self, other: &HybridBitSet<T>)

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### impl<T: Clone> Clone for Dual<T>

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#### fn clone(&self) -> Dual<T>

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<T: Debug> Debug for Dual<T>

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

Formats the value using the given formatter. Read more
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### impl<T, C> DebugWithContext<C> for Dual<T>
where T: DebugWithContext<C>,

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#### fn fmt_with(&self, ctxt: &C, f: &mut Formatter<'_>) -> Result

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#### fn fmt_diff_with(&self, old: &Self, ctxt: &C, f: &mut Formatter<'_>) -> Result

Print the difference between `self` and `old`. Read more
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### impl<T: Idx> GenKill<T> for Dual<BitSet<T>>

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#### fn gen(&mut self, elem: T)

Inserts `elem` into the state vector.
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#### fn kill(&mut self, elem: T)

Removes `elem` from the state vector.
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#### fn gen_all(&mut self, elems: impl IntoIterator<Item = T>)

Calls `gen` for each element in `elems`.
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#### fn kill_all(&mut self, elems: impl IntoIterator<Item = T>)

Calls `kill` for each element in `elems`.
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### impl<T: MeetSemiLattice> JoinSemiLattice for Dual<T>

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#### fn join(&mut self, other: &Self) -> bool

Computes the least upper bound of two elements, storing the result in `self` and returning `true` if `self` has changed. Read more
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### impl<T: JoinSemiLattice> MeetSemiLattice for Dual<T>

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#### fn meet(&mut self, other: &Self) -> bool

Computes the greatest lower bound of two elements, storing the result in `self` and returning `true` if `self` has changed. Read more
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### impl<T: PartialEq> PartialEq for Dual<T>

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#### fn eq(&self, other: &Dual<T>) -> bool

This method tests for `self` and `other` values to be equal, and is used by `==`.
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#### fn ne(&self, other: &Rhs) -> bool

This method tests for `!=`. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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### impl<T: Copy> Copy for Dual<T>

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### impl<T: Eq> Eq for Dual<T>

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### impl<T> StructuralEq for Dual<T>

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### impl<T> StructuralPartialEq for Dual<T>

## Auto Trait Implementations§

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### impl<T> RefUnwindSafe for Dual<T>
where T: RefUnwindSafe,

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### impl<T> Send for Dual<T>
where T: Send,

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### impl<T> Sync for Dual<T>
where T: Sync,

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### impl<T> Unpin for Dual<T>
where T: Unpin,

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### impl<T> UnwindSafe for Dual<T>
where T: UnwindSafe,

## Blanket Implementations§

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### impl<T> Any for T
where 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 T
where 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 T
where 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 T
where 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 T
where 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 T
where 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 T
where 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: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.