corecel/sys/EnvironmentIO.json.hh

0001 //----------------------------------*-C++-*----------------------------------//
0002 // Copyright 2022-2024 UT-Battelle, LLC, and other Celeritas developers.
0003 // See the top-level COPYRIGHT file for details.
0004 // SPDX-License-Identifier: (Apache-2.0 OR MIT)
0005 //---------------------------------------------------------------------------//
0006 //! \file corecel/sys/EnvironmentIO.json.hh
0007 //---------------------------------------------------------------------------//
0008 #pragma once
0009
0010 #include <nlohmann/json.hpp>
0011
0012 #include "corecel/Assert.hh"
0013
0014 #include "Environment.hh"
0015
0016 namespace celeritas
0017 {
0018 //---------------------------------------------------------------------------//
0019 /*!
0020  * Read environment variables from a JSON file.
0021  */
0022 inline void from_json(nlohmann::json const& j, Environment& value)
0023 {
0024     CELER_ASSERT(j.is_object());
0025     value.clear();
0026     for (auto const& el : j.items())
0027     {
0028         value.insert({el.key(), el.value().get<std::string>()});
0029     }
0030 }
0031
0032 //---------------------------------------------------------------------------//
0033 /*!
0034  * Write environment variables to a JSON file.
0035  */
0036 inline void to_json(nlohmann::json& j, Environment const& value)
0037 {
0038     j = nlohmann::json::object();
0039     for (auto const& kvref : value.ordered_environment())
0040     {
0041         Environment::value_type const& kv = kvref;
0042         j[kv.first] = kv.second;
0043     }
0044 }
0045
0046 //---------------------------------------------------------------------------//
0047 }  // namespace celeritas