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to.hh
1 // Copyright (C) 2008, 2009 EPITA Research and Development Laboratory (LRDE)
2 //
3 // This file is part of Olena.
4 //
5 // Olena is free software: you can redistribute it and/or modify it under
6 // the terms of the GNU General Public License as published by the Free
7 // Software Foundation, version 2 of the License.
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12 // General Public License for more details.
13 //
14 // You should have received a copy of the GNU General Public License
15 // along with Olena. If not, see <http://www.gnu.org/licenses/>.
16 //
17 // As a special exception, you may use this file as part of a free
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19 // instantiate templates or use macros or inline functions from this
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25 
26 #ifndef MLN_CONVERT_TO_HH
27 # define MLN_CONVERT_TO_HH
28 
34 
35 # include <mln/core/routine/exact.hh>
36 # include <mln/metal/equal.hh>
37 # include <mln/trace/all.hh>
38 # include <mln/convert/from_to.hh>
39 # include <mln/convert/from_to.hxx>
40 
41 
42 namespace mln
43 {
44 
45  namespace convert
46  {
47 
48 
50  template <typename T, typename O>
51  T
52  to(const O& from);
53 
54  // This is no "Object" here to remain as general as possible. For
55  // instance, the conversion "float -> glf" should occur.
56 
57 
58 # ifndef MLN_INCLUDE_ONLY
59 
60  template <typename T, typename O>
61  inline
62  T
63  to(const O& from)
64  {
65  // Technical note:
66  // No trace should be produced by this routine since it can be
67  // applied on large sets of data.
68 
69  mlc_equal(T, mln_exact(T))::check();
70  mlc_equal(O, mln_exact(O))::check();
71 
72  T tmp;
73  from_to(from, tmp);
74 
75  return tmp;
76  }
77 
78 # endif // ! MLN_INCLUDE_ONLY
79 
80  } // end of namespace mln::convert
81 
82 } // end of namespace mln
83 
84 
85 # include <mln/convert/from_to.hh>
86 
87 
88 #endif // ! MLN_CONVERT_TO_HH