geometry/util/coordinate_cast.hpp

0001 // Boost.Geometry (aka GGL, Generic Geometry Library)
0002
0003 // Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
0004 // Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
0005 // Copyright (c) 2009-2012 Mateusz Loskot, London, UK.
0006
0007 // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
0008 // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
0009
0010 // Use, modification and distribution is subject to the Boost Software License,
0011 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
0012 // http://www.boost.org/LICENSE_1_0.txt)
0013
0014 #ifndef BOOST_GEOMETRY_UTIL_COORDINATE_CAST_HPP
0015 #define BOOST_GEOMETRY_UTIL_COORDINATE_CAST_HPP
0016
0017 #include <cstdlib>
0018 #include <string>
0019 #include <boost/lexical_cast.hpp>
0020
0021 namespace boost { namespace geometry
0022 {
0023
0024 #ifndef DOXYGEN_NO_DETAIL
0025 namespace detail
0026 {
0027
0028 /*!
0029 \brief cast coordinates from a string to a coordinate type
0030 \detail By default it uses lexical_cast. However, lexical_cast seems not to support
0031     See also "define_pi" where the same issue is solved
0032 */
0033 template <typename CoordinateType>
0034 struct coordinate_cast
0035 {
0036     static inline CoordinateType apply(std::string const& source)
0037     {
0038 #if defined(BOOST_GEOMETRY_NO_LEXICAL_CAST)
0039         return atof(source.c_str());
0040 #else
0041         return boost::lexical_cast<CoordinateType>(source);
0042 #endif
0043     }
0044 };
0045
0046
0047 } // namespace detail
0048 #endif
0049
0050
0051
0052 }} // namespace boost::geometry
0053
0054 #endif // BOOST_GEOMETRY_UTIL_COORDINATE_CAST_HPP