Aleph::CA::ContextualRuleLike Concept Reference

Context-aware local transition function (Phase 8). More...

#include <tpl_ca_concepts.H>

Concept definition

template<typename R, typename L>
concept Aleph::CA::ContextualRuleLike =  LatticeLike<L>
and requires(const R &r, const typename L::state_type &s,
             Neighbor_View<typename L::state_type> v,
             const Cell_Context<L::rank> &ctx) {
      { r(s, v, ctx) } -> std::convertible_to<typename L::state_type>;
    }

Detailed Description

Context-aware local transition function (Phase 8).

A ContextualRuleLike rule consumes an extra Cell_Context<Rank> argument exposing the current step and the cell coordinate. Rules that need to derive a deterministic per-cell pseudo-random number generator (Forest_Fire_Rule, SIR_Rule, Ising_*, Schelling_Rule, ...) implement this signature so the engine can guarantee bit-for-bit reproducibility independently of thread scheduling.

Template Parameters

R	candidate rule type.
L	lattice type.

Definition at line 185 of file tpl_ca_concepts.H.