local_switch_tuple.hpp

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#pragma once
#include <wmtk/Primitive.hpp>
#include <wmtk/Tuple.hpp>
#if defined(__cpp_concepts) && defined(__cpp_lib_ranges)
#include <ranges>
#endif
 
namespace wmtk::multimesh::utils {
 
// Maps the tuple source according to the operation sequence
// std::vector<PrimitiveType> operations where operations satisfies
// base_target = switch_tuples(base_source, operations)
Tuple local_switch_tuple(
    PrimitiveType mesh_primitive_type,
    const Tuple& source,
    PrimitiveType primitive_type);
 
 
// Performs a sequence of switch_tuple operations in the order specified in sequence.
// in debug mode this will assert a failure, in release this will return a null tuple
#if defined(__cpp_concepts) && defined(__cpp_lib_ranges)
    template <std::ranges::forward_range ContainerType>
#else
template <typename ContainerType>
#endif
Tuple local_switch_tuples(
    PrimitiveType mesh_primitive_type,
    const Tuple& tuple,
    const ContainerType& sequence);
// annoying initializer list prototype to catch switch_tuples(t, {PV,PE})
Tuple local_switch_tuples(
    PrimitiveType mesh_primitive_type,
    const Tuple& tuple,
    const std::initializer_list<PrimitiveType>& sequence);
 
 
// IMPLEMENTATION of above declaration
#if defined(__cpp_concepts) && defined(__cpp_lib_ranges)
    template <std::ranges::forward_range ContainerType>
#else
template <typename ContainerType>
#endif
Tuple local_switch_tuples(
    PrimitiveType mesh_primitive_type,
    const Tuple& tuple,
    const ContainerType& sequence)
{
    static_assert(std::is_same_v<typename ContainerType::value_type, PrimitiveType>);
    Tuple r = tuple;
    for (const PrimitiveType primitive : sequence) {
        r = local_switch_tuple(mesh_primitive_type, r, primitive);
    }
    return r;
}
 
} // namespace wmtk::multimesh::utils