comparison DEPENDENCIES/generic/include/boost/units/static_constant.hpp @ 16:2665513ce2d3

Add boost headers

+// Boost.Units - A C++ library for zero-overhead dimensional analysis and 
+// unit/quantity manipulation and conversion
+//
+// Copyright (C) 2003-2008 Matthias Christian Schabel
+// Copyright (C) 2008 Steven Watanabe
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+#ifndef BOOST_UNITS_STATIC_CONSTANT_HPP
+#define BOOST_UNITS_STATIC_CONSTANT_HPP
+
+#include <boost/units/config.hpp>
+
+/// A convenience macro that allows definition of static
+/// constants in headers in an ODR-safe way.
+#define BOOST_UNITS_STATIC_CONSTANT(name, type)             \
+template<bool b>                                            \
+struct name##_instance_t                                    \
+{                                                           \
+    static const type instance;                             \
+};                                                          \
+                                                            \
+namespace                                                   \
+{                                                           \
+    static const type& name = name##_instance_t<true>::instance;   \
+}                                                           \
+                                                            \
+template<bool b>                                            \
+const type name##_instance_t<b>::instance
+
+/// A convenience macro for static constants with auto 
+/// type deduction. 
+#if BOOST_UNITS_HAS_TYPEOF
+
+#if BOOST_UNITS_HAS_BOOST_TYPEOF
+
+#define BOOST_UNITS_AUTO_STATIC_CONSTANT(name, value)               \
+BOOST_TYPEOF_NESTED_TYPEDEF(name##_nested_t, value)                 \
+BOOST_UNITS_STATIC_CONSTANT(name, name##_nested_t::type) = (value)
+
+#elif BOOST_UNITS_HAS_MWERKS_TYPEOF
+
+#define BOOST_UNITS_AUTO_STATIC_CONSTANT(name, value)               \
+BOOST_UNITS_STATIC_CONSTANT(name, __typeof__(value)) = (value)
+
+#elif BOOST_UNITS_HAS_GNU_TYPEOF
+
+#define BOOST_UNITS_AUTO_STATIC_CONSTANT(name, value)               \
+BOOST_UNITS_STATIC_CONSTANT(name, typeof(value)) = (value)
+
+#endif // BOOST_UNITS_HAS_BOOST_TYPEOF
+
+#endif // BOOST_UNITS_HAS_TYPEOF
+
+#endif // BOOST_UNITS_STATIC_CONSTANT_HPP