1 //---------------------------------------------------------------------------//
2 // Copyright (c) 2013-2014 Kyle Lutz <kyle.r.lutz@gmail.com>
3 //
4 // Distributed under the Boost Software License, Version 1.0
5 // See accompanying file LICENSE_1_0.txt or copy at
6 // http://www.boost.org/LICENSE_1_0.txt
7 //
8 // See http://boostorg.github.com/compute for more information.
9 //---------------------------------------------------------------------------//
10 
11 #ifndef BOOST_COMPUTE_DETAIL_LITERAL_HPP
12 #define BOOST_COMPUTE_DETAIL_LITERAL_HPP
13 
14 #include <iomanip>
15 #include <limits>
16 #include <sstream>
17 
18 #include <boost/type_traits/is_same.hpp>
19 
20 #include <boost/compute/types/fundamental.hpp>
21 
22 namespace boost {
23 namespace compute {
24 namespace detail {
25 
26 template<class T>
make_literal(T x)27 std::string make_literal(T x)
28 {
29     std::stringstream s;
30     s << std::setprecision(
31 #ifndef BOOST_NO_CXX11_NUMERIC_LIMITS
32             std::numeric_limits<T>::max_digits10
33 #else
34             // We don't have max_digits10, so add 3 other digits (this is what is required for
35             // float, and is one more than required for double).
36             3 + std::numeric_limits<T>::digits10
37 #endif
38             )
39       << std::scientific
40       << x;
41 
42     if(boost::is_same<T, float>::value || boost::is_same<T, float_>::value){
43         s << "f";
44     }
45 
46     return s.str();
47 }
48 
49 } // end detail namespace
50 } // end compute namespace
51 } // end boost namespace
52 
53 #endif // BOOST_COMPUTE_DETAIL_LITERAL_HPP
54