make_iter_name.hpp

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#ifndef STAN_MATH_PRIM_ERR_MAKE_ITER_NAME_HPP
#define STAN_MATH_PRIM_ERR_MAKE_ITER_NAME_HPP
 
#include <stan/math/prim/fun/Eigen.hpp>
#include <stan/math/prim/meta.hpp>
#include <string>
 
namespace stan {
namespace math {
namespace internal {
 
inline constexpr auto construct_idx() noexcept { return ""; }
 
template <typename... Idxs>
inline auto construct_idx(size_t i, Idxs... idxs) {
  if (sizeof...(Idxs) > 0) {
    return std::to_string(i + stan::error_index::value) + ", "
           + construct_idx(idxs...);
  } else {
    return std::to_string(i + stan::error_index::value);
  }
}
 
inline auto make_iter_name(const char* name) { return std::string(name); }
 
template <typename... Idxs>
inline auto make_iter_name(const char* name, Idxs... idxs) {
  return (std::string(name) + "[" + construct_idx(idxs...) + "]");
}
}  // namespace internal
}  // namespace math
}  // namespace stan
 
#endif