Emrys::ResamplerWithScratch Concept Reference

A Resampler that also takes scratch, called as r(weights, ancestors, rng, scratch) with scratch a std::span<Scalar> of at least weights.size() + ancestors.size() elements. More...

#include <EmrysFilter/Core/Resampling.h>

Concept definition

template<typename R, typename Scalar, typename G>
concept ResamplerWithScratch = Resampler<R, Scalar, G>
                            && requires(
                                   R const & r,
                                   std::span<Scalar const> weights,
                                   std::span<Eigen::Index> ancestors,
                                   G & rng,
                                   std::span<Scalar> scratch
                            ) { r(weights, ancestors, rng, scratch); }

Detailed Description

A Resampler that also takes scratch, called as r(weights, ancestors, rng, scratch) with scratch a std::span<Scalar> of at least weights.size() + ancestors.size() elements.

ParticleSet::resample() calls a resampler this way if it can, with scratch it keeps.