paludis  Version 2.6.0
return_literal_function.hh
1 /* vim: set sw=4 sts=4 et foldmethod=syntax : */
2 
3 /*
4  * Copyright (c) 2009 Ciaran McCreesh
5  *
6  * This file is part of the Paludis package manager. Paludis is free software;
7  * you can redistribute it and/or modify it under the terms of the GNU General
8  * Public License version 2, as published by the Free Software Foundation.
9  *
10  * Paludis is distributed in the hope that it will be useful, but WITHOUT ANY
11  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
12  * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
13  * details.
14  *
15  * You should have received a copy of the GNU General Public License along with
16  * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
17  * Place, Suite 330, Boston, MA 02111-1307 USA
18  */
19 
20 #ifndef PALUDIS_GUARD_PALUDIS_UTIL_RETURN_LITERAL_FUNCTION_HH
21 #define PALUDIS_GUARD_PALUDIS_UTIL_RETURN_LITERAL_FUNCTION_HH 1
22 
23 #include <paludis/util/return_literal_function-fwd.hh>
24 
25 namespace paludis
26 {
27  template <typename T_>
28  struct ReturnLiteralFunction
29  {
30  const T_ value;
31 
32  const T_ operator() () const PALUDIS_ATTRIBUTE((warn_unused_result))
33  {
34  return value;
35  }
36 
37  ReturnLiteralFunction(const T_ & v) :
38  value(v)
39  {
40  }
41  };
42 
43  template <typename T_>
44  std::function<T_ ()> return_literal_function(const T_ & v)
45  {
46  return ReturnLiteralFunction<T_>(v);
47  }
48 }
49 
50 #endif
Definition: about_metadata-fwd.hh:23
#define PALUDIS_ATTRIBUTE(x)
Definition: attributes.hh:53