Method getLogger

src/backend/common/cast.hpp:69–73

template<typename To, typename Ti>
struct CastWrapper {
    static spdlog::logger *getLogger() noexcept {
        static std::shared_ptr<spdlog::logger> logger =
            common::loggerFactory("ast");
        return logger.get();
    }

    detail::Array<To> operator()(const detail::Array<Ti> &in) {
        using detail::jit::UnaryNode;