tpl_ca_lattice.H File Reference

Cellular automata lattice with pluggable boundary policies. More...

#include <cstddef>
#include <limits>
#include <type_traits>
#include <utility>
#include <ah-errors.H>
#include <ca-traits.H>
#include <tpl_ca_concepts.H>

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Classes
struct	Aleph::CA::ca_lattice_detail::is_constant_boundary< B >
	True iff B is a ConstantBoundary<T, V>. More...
struct	Aleph::CA::ca_lattice_detail::is_constant_boundary< ConstantBoundary< T, V > >
class	Aleph::CA::Lattice< Storage, Boundary >
	Lattice that adds boundary-aware access on top of a storage. More...

Namespaces
namespace	Aleph
	Main namespace for Aleph-w library functions.
namespace	Aleph::CA
namespace	Aleph::CA::ca_lattice_detail

Functions
ca_size_t	Aleph::CA::ca_lattice_detail::magnitude (const ca_index_t c) noexcept
ca_size_t	Aleph::CA::ca_lattice_detail::wrap_into_range (ca_index_t c, const ca_size_t n) noexcept
	Wrap a signed coordinate into [0, n) with positive modulo.
ca_size_t	Aleph::CA::ca_lattice_detail::reflect_into_range (const ca_index_t c, const ca_size_t n) noexcept
	Reflect a signed coordinate into [0, n) (no-repeat triangle wave).
template<typename Storage , typename Boundary >
void	Aleph::CA::swap (Lattice< Storage, Boundary > &a, Lattice< Storage, Boundary > &b) noexcept(noexcept(a.swap(b)))
	Free-function swap so the lattice plays nicely with std::swap.

Variables
template<typename B >
constexpr bool	Aleph::CA::ca_lattice_detail::is_constant_boundary_v = is_constant_boundary<B>::value

Detailed Description

Cellular automata lattice with pluggable boundary policies.

Provides Aleph::CA::Lattice<Storage, Boundary> — a thin layer on top of any CA::Lattice-conformant storage that adds boundary-aware access via at_safe(coord). The Boundary tag type drives the resolution of out-of-range coordinates at compile time:

• OpenBoundary — out-of-range cells read as state_type{}.
• ToroidalBoundary — coordinates wrap around on every axis.
• ReflectiveBoundary — coordinates mirror back into the lattice (no-repeat reflection).
• ConstantBoundary<T, V> — out-of-range cells read as V (Dirichlet condition).
• NeumannBoundary — coordinates clamp to the nearest in-range cell (zero-gradient).

Strict access (at, set) goes straight through the storage and retains the storage's bounds-checking. Use at_safe only when the caller may legitimately provide out-of-range coordinates (e.g., a neighbourhood iterating across a corner).

Author

Leandro Rabindranath Leon

Definition in file tpl_ca_lattice.H.