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MixedChinesePostman

problemreductions::models::graph

Struct MixedChinesePostman 

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pub struct MixedChinesePostman<W: WeightElement<Sum = i64>> { /* private fields */ }
Expand description

Mixed Chinese Postman.

Each configuration picks a required traversal direction for every undirected edge. The minimum-cost closed walk is then computed via the directed Chinese Postman subproblem, using all available arcs (including both directions of every undirected edge) for degree-balancing detours.

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impl<W: WeightElement<Sum = i64>> MixedChinesePostman<W>

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pub fn new(graph: MixedGraph, arc_weights: Vec<W>, edge_weights: Vec<W>) -> Self

Create a new mixed Chinese postman instance.

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Panics if the weight-vector lengths do not match the graph shape or if any weight is negative.

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pub fn try_new( graph: MixedGraph, arc_weights: Vec<W>, edge_weights: Vec<W>, ) -> Result<Self, ConstructionError>

Create an instance, returning validation errors instead of panicking.

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pub fn graph(&self) -> &MixedGraph

Return the mixed graph.

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pub fn arc_weights(&self) -> &[W]

Return the directed-arc lengths.

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pub fn edge_weights(&self) -> &[W]

Return the undirected-edge lengths.

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pub fn num_vertices(&self) -> usize

Return the number of vertices.

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pub fn num_arcs(&self) -> usize

Return the number of directed arcs.

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pub fn num_edges(&self) -> usize

Return the number of undirected edges.

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pub fn is_weighted(&self) -> bool

Return whether this instance uses non-unit lengths.

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impl<W> MixedChinesePostman<W>
where W: WeightElement<Sum = i64> + VariantParam,

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pub fn is_valid_solution( &self, config: &[bool], ) -> Result<bool, EvaluationError>

Check whether a configuration yields a valid orientation (strongly connected with proper coverage).

Trait Implementations§

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impl<W> BruteForceProblem for MixedChinesePostman<W>
where W: WeightElement<Sum = i64> + VariantParam,

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fn dimensions(&self) -> Vec<usize>

Cardinality of each coordinate in the brute-force search space.
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fn num_variables(&self) -> usize

Number of coordinates in the brute-force search space.
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impl<W: Clone + WeightElement<Sum = i64>> Clone for MixedChinesePostman<W>

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fn clone(&self) -> MixedChinesePostman<W>

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<W: Debug + WeightElement<Sum = i64>> Debug for MixedChinesePostman<W>

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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 DeclaredVariant for MixedChinesePostman<i64>

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impl DeclaredVariant for MixedChinesePostman<One>

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impl<'de, W> Deserialize<'de> for MixedChinesePostman<W>
where W: Deserialize<'de> + WeightElement<Sum = i64>,

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fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl<W> Problem for MixedChinesePostman<W>
where W: WeightElement<Sum = i64> + VariantParam,

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const NAME: &'static str = "MixedChinesePostman"

Base name of this problem type (e.g., “MaximumIndependentSet”).
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type Solution = Vec<bool>

Mathematical witness type for this problem.
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type Value = Min<<W as WeightElement>::Sum>

The evaluation value type.
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fn parameter_names() -> &'static [&'static str]

Canonical parameter names for this problem model.
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fn parameters(&self) -> ProblemParameters

Measure the complete canonical parameters of this concrete instance.
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fn variant() -> Vec<(&'static str, &'static str)>

Returns variant attributes derived from type parameters. Read more
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fn evaluate( &self, config: &Self::Solution, ) -> Result<Min<W::Sum>, EvaluationError>

Evaluate the problem on a solution.
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fn problem_type() -> ProblemType

Look up this problem’s catalog entry. Read more
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impl ReduceTo<ILP<i64>> for MixedChinesePostman<i64>

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type Result = ReductionMCPToILP

The reduction result type.
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fn reduce_to(&self) -> Result<Self::Result, ReductionError>

Reduce this problem to the target problem type.
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fn target_construction(error: ConstructionError) -> ReductionError
where Self: Sized,

Attach this reduction edge to a target-construction failure.
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fn exact_i64( value: usize, operation: impl Into<String>, ) -> Result<i64, ReductionError>
where Self: Sized,

Convert a structural count used by the target’s exact integer algebra.
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impl<W> Serialize for MixedChinesePostman<W>
where W: Serialize + WeightElement<Sum = i64>,

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fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>
where __S: Serializer,

Serialize this value into the given Serde serializer. Read more

Auto Trait Implementations§

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impl<W> Freeze for MixedChinesePostman<W>

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impl<W> RefUnwindSafe for MixedChinesePostman<W>
where W: RefUnwindSafe,

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impl<W> Send for MixedChinesePostman<W>
where W: Send,

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impl<W> Sync for MixedChinesePostman<W>
where W: Sync,

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impl<W> Unpin for MixedChinesePostman<W>
where W: Unpin,

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impl<W> UnsafeUnpin for MixedChinesePostman<W>

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impl<W> UnwindSafe for MixedChinesePostman<W>
where W: 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> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> Conv for T

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fn conv<T>(self) -> T
where Self: Into<T>,

Converts self into T using Into<T>. Read more
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impl<T> DeserializeOwned for T
where T: for<'de> Deserialize<'de>,

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impl<T> FmtForward for T

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fn fmt_binary(self) -> FmtBinary<Self>
where Self: Binary,

Causes self to use its Binary implementation when Debug-formatted.
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fn fmt_display(self) -> FmtDisplay<Self>
where Self: Display,

Causes self to use its Display implementation when Debug-formatted.
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fn fmt_lower_exp(self) -> FmtLowerExp<Self>
where Self: LowerExp,

Causes self to use its LowerExp implementation when Debug-formatted.
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fn fmt_lower_hex(self) -> FmtLowerHex<Self>
where Self: LowerHex,

Causes self to use its LowerHex implementation when Debug-formatted.
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fn fmt_octal(self) -> FmtOctal<Self>
where Self: Octal,

Causes self to use its Octal implementation when Debug-formatted.
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fn fmt_pointer(self) -> FmtPointer<Self>
where Self: Pointer,

Causes self to use its Pointer implementation when Debug-formatted.
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fn fmt_upper_exp(self) -> FmtUpperExp<Self>
where Self: UpperExp,

Causes self to use its UpperExp implementation when Debug-formatted.
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fn fmt_upper_hex(self) -> FmtUpperHex<Self>
where Self: UpperHex,

Causes self to use its UpperHex implementation when Debug-formatted.
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fn fmt_list(self) -> FmtList<Self>
where &'a Self: for<'a> IntoIterator,

Formats each item in a sequence. 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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where T: ?Sized,

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fn pipe<R>(self, func: impl FnOnce(Self) -> R) -> R
where Self: Sized,

Pipes by value. This is generally the method you want to use. Read more
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fn pipe_ref<'a, R>(&'a self, func: impl FnOnce(&'a Self) -> R) -> R
where R: 'a,

Borrows self and passes that borrow into the pipe function. Read more
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fn pipe_ref_mut<'a, R>(&'a mut self, func: impl FnOnce(&'a mut Self) -> R) -> R
where R: 'a,

Mutably borrows self and passes that borrow into the pipe function. Read more
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fn pipe_borrow<'a, B, R>(&'a self, func: impl FnOnce(&'a B) -> R) -> R
where Self: Borrow<B>, B: 'a + ?Sized, R: 'a,

Borrows self, then passes self.borrow() into the pipe function. Read more
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where Self: BorrowMut<B>, B: 'a + ?Sized, R: 'a,

Mutably borrows self, then passes self.borrow_mut() into the pipe function. Read more
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fn pipe_as_ref<'a, U, R>(&'a self, func: impl FnOnce(&'a U) -> R) -> R
where Self: AsRef<U>, U: 'a + ?Sized, R: 'a,

Borrows self, then passes self.as_ref() into the pipe function.
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where Self: AsMut<U>, U: 'a + ?Sized, R: 'a,

Mutably borrows self, then passes self.as_mut() into the pipe function.
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where Self: Deref<Target = T>, T: 'a + ?Sized, R: 'a,

Borrows self, then passes self.deref() into the pipe function.
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fn pipe_deref_mut<'a, T, R>( &'a mut self, func: impl FnOnce(&'a mut T) -> R, ) -> R
where Self: DerefMut<Target = T> + Deref, T: 'a + ?Sized, R: 'a,

Mutably borrows self, then passes self.deref_mut() into the pipe function.
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impl<T> Tap for T

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fn tap(self, func: impl FnOnce(&Self)) -> Self

Immutable access to a value. Read more
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fn tap_mut(self, func: impl FnOnce(&mut Self)) -> Self

Mutable access to a value. Read more
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fn tap_borrow<B>(self, func: impl FnOnce(&B)) -> Self
where Self: Borrow<B>, B: ?Sized,

Immutable access to the Borrow<B> of a value. Read more
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fn tap_borrow_mut<B>(self, func: impl FnOnce(&mut B)) -> Self
where Self: BorrowMut<B>, B: ?Sized,

Mutable access to the BorrowMut<B> of a value. Read more
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fn tap_ref<R>(self, func: impl FnOnce(&R)) -> Self
where Self: AsRef<R>, R: ?Sized,

Immutable access to the AsRef<R> view of a value. Read more
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fn tap_ref_mut<R>(self, func: impl FnOnce(&mut R)) -> Self
where Self: AsMut<R>, R: ?Sized,

Mutable access to the AsMut<R> view of a value. Read more
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fn tap_deref<T>(self, func: impl FnOnce(&T)) -> Self
where Self: Deref<Target = T>, T: ?Sized,

Immutable access to the Deref::Target of a value. Read more
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fn tap_deref_mut<T>(self, func: impl FnOnce(&mut T)) -> Self
where Self: DerefMut<Target = T> + Deref, T: ?Sized,

Mutable access to the Deref::Target of a value. Read more
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fn tap_dbg(self, func: impl FnOnce(&Self)) -> Self

Calls .tap() only in debug builds, and is erased in release builds.
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fn tap_mut_dbg(self, func: impl FnOnce(&mut Self)) -> Self

Calls .tap_mut() only in debug builds, and is erased in release builds.
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fn tap_borrow_dbg<B>(self, func: impl FnOnce(&B)) -> Self
where Self: Borrow<B>, B: ?Sized,

Calls .tap_borrow() only in debug builds, and is erased in release builds.
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fn tap_borrow_mut_dbg<B>(self, func: impl FnOnce(&mut B)) -> Self
where Self: BorrowMut<B>, B: ?Sized,

Calls .tap_borrow_mut() only in debug builds, and is erased in release builds.
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fn tap_ref_dbg<R>(self, func: impl FnOnce(&R)) -> Self
where Self: AsRef<R>, R: ?Sized,

Calls .tap_ref() only in debug builds, and is erased in release builds.
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fn tap_ref_mut_dbg<R>(self, func: impl FnOnce(&mut R)) -> Self
where Self: AsMut<R>, R: ?Sized,

Calls .tap_ref_mut() only in debug builds, and is erased in release builds.
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fn tap_deref_dbg<T>(self, func: impl FnOnce(&T)) -> Self
where Self: Deref<Target = T>, T: ?Sized,

Calls .tap_deref() only in debug builds, and is erased in release builds.
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fn tap_deref_mut_dbg<T>(self, func: impl FnOnce(&mut T)) -> Self
where Self: DerefMut<Target = T> + Deref, T: ?Sized,

Calls .tap_deref_mut() only in debug builds, and is erased in release builds.
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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> TryConv for T

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fn try_conv<T>(self) -> Result<T, Self::Error>
where Self: TryInto<T>,

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

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type Error = Infallible

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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

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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.