--- a/src/measures/discrete.rs Tue Aug 01 10:25:09 2023 +0300
+++ b/src/measures/discrete.rs Mon Feb 17 13:54:53 2025 -0500
@@ -11,9 +11,11 @@
use alg_tools::norms::Norm;
use alg_tools::tabledump::TableDump;
-use alg_tools::linops::{Apply, Linear};
+use alg_tools::linops::{Mapping, Linear};
use alg_tools::iter::{MapF,Mappable};
use alg_tools::nalgebra_support::ToNalgebraRealField;
+use alg_tools::collection::Collection;
+use alg_tools::instance::{Instance, Decomposition, MyCow, EitherDecomp, Space};
use crate::types::*;
use super::base::*;
@@ -29,6 +31,8 @@
pub(super) spikes : Vec<DeltaMeasure<Domain, F>>,
}
+pub type RNDM<F, const N : usize> = DiscreteMeasure<Loc<F, N>, F>;
+
/// Iterator over the [`DeltaMeasure`] spikes of a [`DiscreteMeasure`].
pub type SpikeIter<'a, Domain, F> = std::slice::Iter<'a, DeltaMeasure<Domain, F>>;
@@ -59,6 +63,20 @@
self.spikes.len()
}
+ /// Replace with the zero measure.
+ #[inline]
+ pub fn clear(&mut self) {
+ self.spikes.clear()
+ }
+
+ /// Remove `i`:th spike, not maintaining order.
+ ///
+ /// Panics if indiex is out of bounds.
+ #[inline]
+ pub fn swap_remove(&mut self, i : usize) -> DeltaMeasure<Domain, F>{
+ self.spikes.swap_remove(i)
+ }
+
/// Iterate over (references to) the [`DeltaMeasure`] spikes in this measure
#[inline]
pub fn iter_spikes(&self) -> SpikeIter<'_, Domain, F> {
@@ -95,6 +113,13 @@
self.spikes.iter_mut().zip(iter).for_each(|(δ, α)| δ.set_mass(α));
}
+ /// Update the locations of all the spikes to those produced by an iterator.
+ #[inline]
+ pub fn set_locations<'a, I : Iterator<Item=&'a Domain>>(&mut self, iter : I)
+ where Domain : 'static + Clone {
+ self.spikes.iter_mut().zip(iter.cloned()).for_each(|(δ, α)| δ.set_location(α));
+ }
+
// /// Map the masses of all the spikes using a function and an iterator
// #[inline]
// pub fn zipmap_masses<
@@ -107,50 +132,162 @@
/// Prune all spikes with zero mass.
#[inline]
pub fn prune(&mut self) {
- self.spikes.retain(|δ| δ.α != F::ZERO);
+ self.prune_by(|δ| δ.α != F::ZERO);
+ }
+
+ /// Prune spikes by the predicate `g`.
+ #[inline]
+ pub fn prune_by<G : FnMut(&DeltaMeasure<Domain, F>) -> bool>(&mut self, g : G) {
+ self.spikes.retain(g);
+ }
+
+ /// Add the spikes produced by `iter` to this measure.
+ #[inline]
+ pub fn extend<I : Iterator<Item=DeltaMeasure<Domain, F>>>(
+ &mut self,
+ iter : I
+ ) {
+ self.spikes.extend(iter);
+ }
+
+ /// Add a spike to the measure
+ #[inline]
+ pub fn push(&mut self, δ : DeltaMeasure<Domain, F>) {
+ self.spikes.push(δ);
+ }
+
+ /// Iterate over triples of masses and locations of two discrete measures, which are assumed
+ /// to have equal locations of same spike indices.
+ pub fn both_matching<'a>(&'a self, other : &'a DiscreteMeasure<Domain, F>) ->
+ impl Iterator<Item=(F, F, &'a Domain)> {
+ let m = self.len().max(other.len());
+ self.iter_spikes().map(Some).chain(std::iter::repeat(None))
+ .zip(other.iter_spikes().map(Some).chain(std::iter::repeat(None)))
+ .take(m)
+ .map(|(oδ, orδ)| {
+ match (oδ, orδ) {
+ (Some(δ), Some(rδ)) => (δ.α, rδ.α, &δ.x), // Assumed δ.x=rδ.x
+ (Some(δ), None) => (δ.α, F::ZERO, &δ.x),
+ (None, Some(rδ)) => (F::ZERO, rδ.α, &rδ.x),
+ (None, None) => panic!("This cannot happen!"),
+ }
+ })
+ }
+
+ /// Subtract `other` from `self`, assuming equal locations of same spike indices
+ pub fn sub_matching(&self, other : &DiscreteMeasure<Domain, F>) -> DiscreteMeasure<Domain, F>
+ where Domain : Clone {
+ self.both_matching(other)
+ .map(|(α, β, x)| (x.clone(), α - β))
+ .collect()
+ }
+
+ /// Add `other` to `self`, assuming equal locations of same spike indices
+ pub fn add_matching(&self, other : &DiscreteMeasure<Domain, F>) -> DiscreteMeasure<Domain, F>
+ where Domain : Clone {
+ self.both_matching(other)
+ .map(|(α, β, x)| (x.clone(), α + β))
+ .collect()
+ }
+
+ /// Calculate the Radon-norm distance of `self` to `other`,
+ /// assuming equal locations of same spike indices.
+ pub fn dist_matching(&self, other : &DiscreteMeasure<Domain, F>) -> F where F : Float {
+ self.both_matching(other)
+ .map(|(α, β, _)| (α-β).abs())
+ .sum()
+ }
+}
+
+impl<Domain, F : Num> IntoIterator for DiscreteMeasure<Domain, F> {
+ type Item = DeltaMeasure<Domain, F>;
+ type IntoIter = std::vec::IntoIter<DeltaMeasure<Domain, F>>;
+
+ #[inline]
+ fn into_iter(self) -> Self::IntoIter {
+ self.spikes.into_iter()
+ }
+}
+
+impl<'a, Domain, F : Num> IntoIterator for &'a DiscreteMeasure<Domain, F> {
+ type Item = &'a DeltaMeasure<Domain, F>;
+ type IntoIter = SpikeIter<'a, Domain, F>;
+
+ #[inline]
+ fn into_iter(self) -> Self::IntoIter {
+ self.spikes.iter()
+ }
+}
+
+impl<Domain, F : Num> Sum<DeltaMeasure<Domain, F>> for DiscreteMeasure<Domain, F> {
+ // Required method
+ fn sum<I>(iter: I) -> Self
+ where
+ I : Iterator<Item = DeltaMeasure<Domain, F>>
+ {
+ Self::from_iter(iter)
+ }
+}
+
+impl<'a, Domain : Clone, F : Num> Sum<&'a DeltaMeasure<Domain, F>>
+ for DiscreteMeasure<Domain, F>
+{
+ // Required method
+ fn sum<I>(iter: I) -> Self
+ where
+ I : Iterator<Item = &'a DeltaMeasure<Domain, F>>
+ {
+ Self::from_iter(iter.cloned())
+ }
+}
+
+impl<Domain, F : Num> Sum<DiscreteMeasure<Domain, F>> for DiscreteMeasure<Domain, F> {
+ // Required method
+ fn sum<I>(iter: I) -> Self
+ where
+ I : Iterator<Item = DiscreteMeasure<Domain, F>>
+ {
+ Self::from_iter(iter.map(|μ| μ.into_iter()).flatten())
+ }
+}
+
+impl<'a, Domain : Clone, F : Num> Sum<&'a DiscreteMeasure<Domain, F>>
+ for DiscreteMeasure<Domain, F>
+{
+ // Required method
+ fn sum<I>(iter: I) -> Self
+ where
+ I : Iterator<Item = &'a DiscreteMeasure<Domain, F>>
+ {
+ Self::from_iter(iter.map(|μ| μ.iter_spikes()).flatten().cloned())
}
}
impl<Domain : Clone, F : Float> DiscreteMeasure<Domain, F> {
/// Computes `μ1 ← θ * μ1 - ζ * μ2`, pruning entries where both `μ1` (`self`) and `μ2` have
- // zero weight. `μ2` will contain copy of pruned original `μ1` without arithmetic performed.
- /// **This expects `self` and `μ2` to have matching coordinates in each index**.
+ // zero weight. `μ2` will contain a pruned copy of pruned original `μ1` without arithmetic
+ /// performed. **This expects `self` and `μ2` to have matching coordinates in each index**.
// `μ2` can be than `self`, but not longer.
pub fn pruning_sub(&mut self, θ : F, ζ : F, μ2 : &mut Self) {
- let mut μ2_get = 0;
- let mut μ2_insert = 0;
- self.spikes.drain_filter(|&mut DeltaMeasure{ α : ref mut α_ref, ref x }| {
- // Get weight of spike in μ2, zero if out of bounds.
- let β = μ2.spikes.get(μ2_get).map_or(F::ZERO, DeltaMeasure::get_mass);
- μ2_get += 1;
-
- if *α_ref == F::ZERO && β == F::ZERO {
- // Prune
- true
+ for δ in &self[μ2.len()..] {
+ μ2.push(DeltaMeasure{ x : δ.x.clone(), α : F::ZERO});
+ }
+ debug_assert_eq!(self.len(), μ2.len());
+ let mut dest = 0;
+ for i in 0..self.len() {
+ let α = self[i].α;
+ let α_new = θ * α - ζ * μ2[i].α;
+ if dest < i {
+ μ2[dest] = DeltaMeasure{ x : self[i].x.clone(), α };
+ self[dest] = DeltaMeasure{ x : self[i].x.clone(), α : α_new };
} else {
- // Save self weight
- let α = *α_ref;
- // Modify self
- *α_ref = θ * α - ζ * β;
- // Make copy of old self weight in μ2
- let δ = DeltaMeasure{ α, x : x.clone() };
- match μ2.spikes.get_mut(μ2_insert) {
- Some(replace) => {
- *replace = δ;
- },
- None => {
- debug_assert_eq!(μ2.len(), μ2_insert);
- μ2.spikes.push(δ);
- },
- }
- μ2_insert += 1;
- // Keep
- false
+ μ2[i].α = α;
+ self[i].α = α_new;
}
- });
- // Truncate μ2 to same length as self.
- μ2.spikes.truncate(μ2_insert);
- debug_assert_eq!(μ2.len(), self.len());
+ dest += 1;
+ }
+ self.spikes.truncate(dest);
+ μ2.spikes.truncate(dest);
}
}
@@ -174,23 +311,61 @@
pub fn set_masses_dvector(&mut self, x : &DVector<F::MixedType>) {
self.set_masses(x.iter().map(|&α| F::from_nalgebra_mixed(α)));
}
+
+ // /// Extracts the masses of the spikes as a [`Vec`].
+ // pub fn masses_vec(&self) -> Vec<F::MixedType> {
+ // self.iter_masses()
+ // .map(|α| α.to_nalgebra_mixed())
+ // .collect()
+ // }
+
+ // /// Sets the masses of the spikes from the values of a [`Vec`].
+ // pub fn set_masses_vec(&mut self, x : &Vec<F::MixedType>) {
+ // self.set_masses(x.iter().map(|&α| F::from_nalgebra_mixed(α)));
+ // }
}
-impl<Domain, F :Num> Index<usize> for DiscreteMeasure<Domain, F> {
- type Output = DeltaMeasure<Domain, F>;
+// impl<Domain, F :Num> Index<usize> for DiscreteMeasure<Domain, F> {
+// type Output = DeltaMeasure<Domain, F>;
+// #[inline]
+// fn index(&self, i : usize) -> &Self::Output {
+// self.spikes.index(i)
+// }
+// }
+
+// impl<Domain, F :Num> IndexMut<usize> for DiscreteMeasure<Domain, F> {
+// #[inline]
+// fn index_mut(&mut self, i : usize) -> &mut Self::Output {
+// self.spikes.index_mut(i)
+// }
+// }
+
+impl<
+ Domain,
+ F : Num,
+ I : std::slice::SliceIndex<[DeltaMeasure<Domain, F>]>
+> Index<I>
+for DiscreteMeasure<Domain, F> {
+ type Output = <I as std::slice::SliceIndex<[DeltaMeasure<Domain, F>]>>::Output;
#[inline]
- fn index(&self, i : usize) -> &Self::Output {
+ fn index(&self, i : I) -> &Self::Output {
self.spikes.index(i)
}
}
-impl<Domain, F :Num> IndexMut<usize> for DiscreteMeasure<Domain, F> {
+impl<
+ Domain,
+ F : Num,
+ I : std::slice::SliceIndex<[DeltaMeasure<Domain, F>]>
+> IndexMut<I>
+for DiscreteMeasure<Domain, F> {
#[inline]
- fn index_mut(&mut self, i : usize) -> &mut Self::Output {
+ fn index_mut(&mut self, i : I) -> &mut Self::Output {
self.spikes.index_mut(i)
}
}
+
impl<Domain, F : Num, D : Into<DeltaMeasure<Domain, F>>, const K : usize> From<[D; K]>
for DiscreteMeasure<Domain, F> {
#[inline]
@@ -199,6 +374,45 @@
}
}
+impl<Domain, F : Num> From<Vec<DeltaMeasure<Domain, F>>>
+for DiscreteMeasure<Domain, F> {
+ #[inline]
+ fn from(spikes : Vec<DeltaMeasure<Domain, F>>) -> Self {
+ DiscreteMeasure{ spikes }
+ }
+}
+
+impl<'a, Domain, F : Num, D> From<&'a [D]>
+for DiscreteMeasure<Domain, F>
+where &'a D : Into<DeltaMeasure<Domain, F>> {
+ #[inline]
+ fn from(list : &'a [D]) -> Self {
+ list.into_iter().map(|d| d.into()).collect()
+ }
+}
+
+
+impl<Domain, F : Num> From<DeltaMeasure<Domain, F>>
+for DiscreteMeasure<Domain, F> {
+ #[inline]
+ fn from(δ : DeltaMeasure<Domain, F>) -> Self {
+ DiscreteMeasure{
+ spikes : vec!(δ)
+ }
+ }
+}
+
+impl<'a, Domain : Clone, F : Num> From<&'a DeltaMeasure<Domain, F>>
+for DiscreteMeasure<Domain, F> {
+ #[inline]
+ fn from(δ : &'a DeltaMeasure<Domain, F>) -> Self {
+ DiscreteMeasure{
+ spikes : vec!(δ.clone())
+ }
+ }
+}
+
+
impl<Domain, F : Num, D : Into<DeltaMeasure<Domain, F>>> FromIterator<D>
for DiscreteMeasure<Domain, F> {
#[inline]
@@ -258,19 +472,28 @@
}
}
-impl<Domain, G, F : Num, Y : Sum + Mul<F, Output=Y>> Apply<G> for DiscreteMeasure<Domain, F>
-where G: for<'a> Apply<&'a Domain, Output = Y> {
- type Output = Y;
+impl<Domain, G, F : Num> Mapping<G> for DiscreteMeasure<Domain, F>
+where
+ Domain : Space,
+ G::Codomain : Sum + Mul<F, Output=G::Codomain>,
+ G : Mapping<Domain, Codomain=F> + Clone + Space,
+ for<'b> &'b Domain : Instance<Domain>,
+{
+ type Codomain = G::Codomain;
+
#[inline]
- fn apply(&self, g : G) -> Y {
- self.spikes.iter().map(|m| g.apply(&m.x) * m.α).sum()
+ fn apply<I : Instance<G>>(&self, g : I) -> Self::Codomain {
+ g.eval(|g| self.spikes.iter().map(|m| g.apply(&m.x) * m.α).sum())
}
}
-impl<Domain, G, F : Num, Y : Sum + Mul<F, Output=Y>> Linear<G> for DiscreteMeasure<Domain, F>
-where G : for<'a> Apply<&'a Domain, Output = Y> {
- type Codomain = Y;
-}
+impl<Domain, G, F : Num> Linear<G> for DiscreteMeasure<Domain, F>
+where
+ Domain : Space,
+ G::Codomain : Sum + Mul<F, Output=G::Codomain>,
+ G : Mapping<Domain, Codomain=F> + Clone + Space,
+ for<'b> &'b Domain : Instance<Domain>,
+{ }
/// Helper trait for constructing arithmetic operations for combinations
@@ -278,6 +501,7 @@
trait Lift<F : Num, Domain> {
type Producer : Iterator<Item=DeltaMeasure<Domain, F>>;
+ #[allow(dead_code)]
/// Lifts `self` into a [`DiscreteMeasure`].
fn lift(self) -> DiscreteMeasure<Domain, F>;
@@ -574,3 +798,217 @@
make_discrete_scalarop_lhs!(Mul, mul; f32 f64 i8 i16 i32 i64 isize u8 u16 u32 u64 usize);
make_discrete_scalarop_lhs!(Div, div; f32 f64 i8 i16 i32 i64 isize u8 u16 u32 u64 usize);
+
+impl<F : Num, Domain> Collection for DiscreteMeasure<Domain, F> {
+ type Element = DeltaMeasure<Domain, F>;
+ type RefsIter<'a> = std::slice::Iter<'a, Self::Element> where Self : 'a;
+
+ #[inline]
+ fn iter_refs(&self) -> Self::RefsIter<'_> {
+ self.iter_spikes()
+ }
+}
+
+impl<Domain : Clone, F : Num> Space for DiscreteMeasure<Domain, F> {
+ type Decomp = MeasureDecomp;
+}
+
+pub type SpikeSlice<'b, Domain, F> = &'b [DeltaMeasure<Domain, F>];
+
+pub type EitherSlice<'b, Domain, F> = EitherDecomp<
+ Vec<DeltaMeasure<Domain, F>>,
+ SpikeSlice<'b, Domain, F>
+>;
+
+impl<F : Num, Domain : Clone> Decomposition<DiscreteMeasure<Domain, F>> for MeasureDecomp {
+ type Decomposition<'b> = EitherSlice<'b, Domain, F> where DiscreteMeasure<Domain, F> : 'b;
+ type Reference<'b> = SpikeSlice<'b, Domain, F> where DiscreteMeasure<Domain, F> : 'b;
+
+ /// Left the lightweight reference type into a full decomposition type.
+ fn lift<'b>(r : Self::Reference<'b>) -> Self::Decomposition<'b> {
+ EitherDecomp::Borrowed(r)
+ }
+}
+
+impl<F : Num, Domain : Clone> Instance<DiscreteMeasure<Domain, F>, MeasureDecomp>
+for DiscreteMeasure<Domain, F>
+{
+ fn decompose<'b>(self)
+ -> <MeasureDecomp as Decomposition<DiscreteMeasure<Domain, F>>>::Decomposition<'b>
+ where Self : 'b, DiscreteMeasure<Domain, F> : 'b {
+ EitherDecomp::Owned(self.spikes)
+ }
+
+ fn ref_instance(&self)
+ -> <MeasureDecomp as Decomposition<DiscreteMeasure<Domain, F>>>::Reference<'_>
+ {
+ self.spikes.as_slice()
+ }
+
+ fn cow<'b>(self) -> MyCow<'b, DiscreteMeasure<Domain, F>> where Self : 'b {
+ MyCow::Owned(self)
+ }
+
+ fn own(self) -> DiscreteMeasure<Domain, F> {
+ self
+ }
+}
+
+impl<'a, F : Num, Domain : Clone> Instance<DiscreteMeasure<Domain, F>, MeasureDecomp>
+for &'a DiscreteMeasure<Domain, F>
+{
+ fn decompose<'b>(self)
+ -> <MeasureDecomp as Decomposition<DiscreteMeasure<Domain, F>>>::Decomposition<'b>
+ where Self : 'b, DiscreteMeasure<Domain, F> : 'b {
+ EitherDecomp::Borrowed(self.spikes.as_slice())
+ }
+
+ fn ref_instance(&self)
+ -> <MeasureDecomp as Decomposition<DiscreteMeasure<Domain, F>>>::Reference<'_>
+ {
+ self.spikes.as_slice()
+ }
+
+ fn cow<'b>(self) -> MyCow<'b, DiscreteMeasure<Domain, F>> where Self : 'b {
+ MyCow::Borrowed(self)
+ }
+
+ fn own(self) -> DiscreteMeasure<Domain, F> {
+ self.clone()
+ }
+}
+
+impl<'a, F : Num, Domain : Clone> Instance<DiscreteMeasure<Domain, F>, MeasureDecomp>
+for EitherSlice<'a, Domain, F>
+{
+ fn decompose<'b>(self)
+ -> <MeasureDecomp as Decomposition<DiscreteMeasure<Domain, F>>>::Decomposition<'b>
+ where Self : 'b, DiscreteMeasure<Domain, F> : 'b {
+ self
+ }
+
+ fn ref_instance(&self)
+ -> <MeasureDecomp as Decomposition<DiscreteMeasure<Domain, F>>>::Reference<'_>
+ {
+ match self {
+ EitherDecomp::Owned(v) => v.as_slice(),
+ EitherDecomp::Borrowed(s) => s,
+ }
+ }
+
+ fn own(self) -> DiscreteMeasure<Domain, F> {
+ match self {
+ EitherDecomp::Owned(v) => v.into(),
+ EitherDecomp::Borrowed(s) => s.into(),
+ }
+ }
+}
+
+impl<'a, F : Num, Domain : Clone> Instance<DiscreteMeasure<Domain, F>, MeasureDecomp>
+for &'a EitherSlice<'a, Domain, F>
+{
+ fn decompose<'b>(self)
+ -> <MeasureDecomp as Decomposition<DiscreteMeasure<Domain, F>>>::Decomposition<'b>
+ where Self : 'b, DiscreteMeasure<Domain, F> : 'b {
+ match self {
+ EitherDecomp::Owned(v) => EitherDecomp::Borrowed(v.as_slice()),
+ EitherDecomp::Borrowed(s) => EitherDecomp::Borrowed(s),
+ }
+ }
+
+ fn ref_instance(&self)
+ -> <MeasureDecomp as Decomposition<DiscreteMeasure<Domain, F>>>::Reference<'_>
+ {
+ match self {
+ EitherDecomp::Owned(v) => v.as_slice(),
+ EitherDecomp::Borrowed(s) => s,
+ }
+ }
+
+ fn own(self) -> DiscreteMeasure<Domain, F> {
+ match self {
+ EitherDecomp::Owned(v) => v.as_slice(),
+ EitherDecomp::Borrowed(s) => s
+ }.into()
+ }
+}
+
+impl<'a, F : Num, Domain : Clone> Instance<DiscreteMeasure<Domain, F>, MeasureDecomp>
+for SpikeSlice<'a, Domain, F>
+{
+ fn decompose<'b>(self)
+ -> <MeasureDecomp as Decomposition<DiscreteMeasure<Domain, F>>>::Decomposition<'b>
+ where Self : 'b, DiscreteMeasure<Domain, F> : 'b {
+ EitherDecomp::Borrowed(self)
+ }
+
+ fn ref_instance(&self)
+ -> <MeasureDecomp as Decomposition<DiscreteMeasure<Domain, F>>>::Reference<'_>
+ {
+ self
+ }
+
+ fn own(self) -> DiscreteMeasure<Domain, F> {
+ self.into()
+ }
+}
+
+impl<'a, F : Num, Domain : Clone> Instance<DiscreteMeasure<Domain, F>, MeasureDecomp>
+for &'a SpikeSlice<'a, Domain, F>
+{
+ fn decompose<'b>(self)
+ -> <MeasureDecomp as Decomposition<DiscreteMeasure<Domain, F>>>::Decomposition<'b>
+ where Self : 'b, DiscreteMeasure<Domain, F> : 'b {
+ EitherDecomp::Borrowed(*self)
+ }
+
+ fn ref_instance(&self)
+ -> <MeasureDecomp as Decomposition<DiscreteMeasure<Domain, F>>>::Reference<'_>
+ {
+ *self
+ }
+
+ fn own(self) -> DiscreteMeasure<Domain, F> {
+ (*self).into()
+ }
+}
+
+impl<F : Num, Domain : Clone > Instance<DiscreteMeasure<Domain, F>, MeasureDecomp>
+for DeltaMeasure<Domain, F>
+{
+ fn decompose<'b>(self)
+ -> <MeasureDecomp as Decomposition<DiscreteMeasure<Domain, F>>>::Decomposition<'b>
+ where Self : 'b, DiscreteMeasure<Domain, F> : 'b {
+ EitherDecomp::Owned(vec![self])
+ }
+
+ fn ref_instance(&self)
+ -> <MeasureDecomp as Decomposition<DiscreteMeasure<Domain, F>>>::Reference<'_>
+ {
+ std::slice::from_ref(self)
+ }
+
+ fn own(self) -> DiscreteMeasure<Domain, F> {
+ self.into()
+ }
+}
+
+impl<'a, F : Num, Domain : Clone> Instance<DiscreteMeasure<Domain, F>, MeasureDecomp>
+for &'a DeltaMeasure<Domain, F>
+{
+ fn decompose<'b>(self)
+ -> <MeasureDecomp as Decomposition<DiscreteMeasure<Domain, F>>>::Decomposition<'b>
+ where Self : 'b, DiscreteMeasure<Domain, F> : 'b {
+ EitherDecomp::Borrowed(std::slice::from_ref(self))
+ }
+
+ fn ref_instance(&self)
+ -> <MeasureDecomp as Decomposition<DiscreteMeasure<Domain, F>>>::Reference<'_>
+ {
+ std::slice::from_ref(*self)
+ }
+
+ fn own(self) -> DiscreteMeasure<Domain, F> {
+ self.into()
+ }
+}