quantities_fhicl.h

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#ifndef LARDATAALG_UTILITIES_QUANTITIES_FHICL_H
#define LARDATAALG_UTILITIES_QUANTITIES_FHICL_H

// LArSoft libraries
#include "larcorealg/CoreUtils/StdUtils.h" // util::to_string()
#include "lardataalg/Utilities/quantities.h"

// support libraries
#include "fhiclcpp/coding.h"

// C++ libraries
#include <any>
#include <string>
#include <string_view>

namespace util::quantities::concepts {

  // --- BEGIN -- FHiCL encoding ---------------------------------------------

  // these utilities need to be defined in the same namespace as `Quantity`

  template <typename... Args>
  void decode(std::any const& src, Quantity<Args...>& q);

  template <typename... Args>
  ::fhicl::detail::ps_atom_t encode(Quantity<Args...> const& q);

  // --- END -- FHiCL encoding -----------------------------------------------

} // namespace util::quantities::concepts

// -----------------------------------------------------------------------------
// ---  template implementation
// -----------------------------------------------------------------------------
template <typename... Args>
void util::quantities::concepts::decode(std::any const& src, Quantity<Args...>& q)
{
  using quantity_t = Quantity<Args...>;

  std::string s;
  ::fhicl::detail::decode(src, s);

  q = util::quantities::makeQuantity<quantity_t>(s);

} // util::quantities::concepts::decode(Quantity)

// -----------------------------------------------------------------------------
template <typename... Args>
::fhicl::detail::ps_atom_t util::quantities::concepts::encode(Quantity<Args...> const& q)
{
  return ::fhicl::detail::encode(util::to_string(q));
} // util::quantities::concepts::encode()

// -----------------------------------------------------------------------------

#endif // LARDATAALG_UTILITIES_QUANTITIES_FHICL_H