constants.h

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// Copyright 2012-2021:
//   GobySoft, LLC (2013-)
//   Massachusetts Institute of Technology (2007-2014)
//   Community contributors (see AUTHORS file)
// File authors:
//   Toby Schneider <toby@gobysoft.org>
//
//
// This file is part of the Goby Underwater Autonomy Project Libraries
// ("The Goby Libraries").
//
// The Goby Libraries are free software: you can redistribute them and/or modify
// them under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 2.1 of the License, or
// (at your option) any later version.
//
// The Goby Libraries are distributed in the hope that they will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with Goby.  If not, see <http://www.gnu.org/licenses/>.
 
#ifndef GOBY_UTIL_CONSTANTS_H
#define GOBY_UTIL_CONSTANTS_H
 
#include <limits>
 
namespace goby
{
namespace util
{
template <class T> constexpr T pi = T(3.1415926535897932385L);
template <class T> constexpr T e = T(2.7182818284590452354L);
 
template <class T> constexpr T NaN{std::numeric_limits<T>::quiet_NaN()};
 
} // namespace util
} // namespace goby
 
#endif