env_vars.h

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2018 KiCad Developers, see AUTHORS.txt for contributors.
 *
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at your
 * option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program. If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef ENV_VARS_H
#define ENV_VARS_H
 
#include <wx/string.h>
#include <vector>
#include <optional>
 
namespace ENV_VAR
{
 using ENV_VAR_LIST = std::vector<wxString>;
 
 bool IsEnvVarImmutable( const wxString& aEnvVar );
 
 const ENV_VAR_LIST& GetPredefinedEnvVars();
 
 wxString LookUpEnvVarHelp( const wxString& aEnvVar );
 
 template <typename VAL_TYPE>
 std::optional<VAL_TYPE> GetEnvVar( const wxString& aEnvVarName );
 
 template<>
 std::optional<wxString> GetEnvVar( const wxString& aEnvVarName );
 
 template <>
 std::optional<double> GetEnvVar( const wxString& aEnvVarName );
};
 
#endif /* ENV_VARS_H */