promote_floating_point.hpp 1.4 KB

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  1. // Boost.Geometry (aka GGL, Generic Geometry Library)
  2. // Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
  3. // Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
  4. // Copyright (c) 2009-2012 Mateusz Loskot, London, UK.
  5. // This file was modified by Oracle on 2020.
  6. // Modifications copyright (c) 2020 Oracle and/or its affiliates.
  7. // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
  8. // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
  9. // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
  10. // Use, modification and distribution is subject to the Boost Software License,
  11. // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  12. // http://www.boost.org/LICENSE_1_0.txt)
  13. #ifndef BOOST_GEOMETRY_UTIL_PROMOTE_FLOATING_POINT_HPP
  14. #define BOOST_GEOMETRY_UTIL_PROMOTE_FLOATING_POINT_HPP
  15. #include <type_traits>
  16. namespace boost { namespace geometry
  17. {
  18. /*!
  19. \brief Meta-function converting, if necessary, to "a floating point" type
  20. \details
  21. - if input type is integer, type is double
  22. - else type is input type
  23. \ingroup utility
  24. */
  25. template <typename T, typename PromoteIntegerTo = double>
  26. struct promote_floating_point
  27. {
  28. typedef std::conditional_t
  29. <
  30. std::is_integral<T>::value,
  31. PromoteIntegerTo,
  32. T
  33. > type;
  34. };
  35. }} // namespace boost::geometry
  36. #endif // BOOST_GEOMETRY_UTIL_PROMOTE_FLOATING_POINT_HPP