1 // Boost.Units - A C++ library for zero-overhead dimensional analysis and
2 // unit/quantity manipulation and conversion
3 //
4 // Copyright (C) 2003-2008 Matthias Christian Schabel
5 // Copyright (C) 2008 Steven Watanabe
6 //
7 // Distributed under the Boost Software License, Version 1.0. (See
8 // accompanying file LICENSE_1_0.txt or copy at
9 // http://www.boost.org/LICENSE_1_0.txt)
10 
11 #ifndef BOOST_UNITS_IS_QUANTITY_HPP
12 #define BOOST_UNITS_IS_QUANTITY_HPP
13 
14 ///
15 /// \file
16 /// \brief Check that a type is a quantity.
17 ///
18 
19 #include <boost/mpl/bool.hpp>
20 #include <boost/units/units_fwd.hpp>
21 
22 namespace boost {
23 
24 namespace units {
25 
26 /// Check that a type is a quantity.
27 template<typename T>
28 struct is_quantity :
29     public mpl::false_
30 { };
31 
32 template<class Unit,
33          class Y>
34 struct is_quantity< quantity<Unit,Y> > :
35     public mpl::true_
36 { };
37 
38 } // namespace units
39 
40 } // namespace boost
41 
42 #endif // BOOST_UNITS_IS_QUANTITY_HPP
43