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Mateusz Pusz
8fd725bc01
The polar_vector/spherical_vector conversion facades were tied to cartesian_vector. Generalize them to accept and produce any structured-bindings-compliant vector representation of the matching dimension that models the exported utility::Vector concept: - from-vector construction reads the dimension via std::tuple_size and the components via structured bindings - to_cartesian<To>() takes the destination representation as a parameter, using parenthesized init and falling back to braced init for initializer_list-only reps such as Blaze's StaticVector - both sides are gated by detail::VectorRepOf<To, N> Add the tuple protocol (std::tuple_size / std::tuple_element and an ADL-found get) for fixed-size Eigen vectors in the eigen integration, so Eigen::Vector2d/Vector3d work directly as a Cartesian representation. Blaze's StaticVector already ships the protocol, so its integration needs nothing. Add a per-backend polar_spherical_integration_test exercising both backends, and a how-to guide section. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>