|
1 // |
|
2 // Boost.Pointer Container |
|
3 // |
|
4 // Copyright Thorsten Ottosen 2003-2005. Use, modification and |
|
5 // distribution is subject to the Boost Software License, Version |
|
6 // 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
|
7 // http://www.boost.org/LICENSE_1_0.txt) |
|
8 // |
|
9 // For more information, see http://www.boost.org/libs/ptr_container/ |
|
10 // |
|
11 |
|
12 #ifndef BOOST_PTR_CONTAINER_INDIRECT_FUN_HPP |
|
13 #define BOOST_PTR_CONTAINER_INDIRECT_FUN_HPP |
|
14 |
|
15 #if defined(_MSC_VER) && (_MSC_VER >= 1200) |
|
16 #pragma once |
|
17 #endif |
|
18 |
|
19 #include <boost/config.hpp> |
|
20 |
|
21 #ifdef BOOST_NO_SFINAE |
|
22 #else |
|
23 #include <boost/utility/result_of.hpp> |
|
24 #include <boost/pointee.hpp> |
|
25 #endif // BOOST_NO_SFINAE |
|
26 |
|
27 #include <boost/assert.hpp> |
|
28 #include <functional> |
|
29 |
|
30 |
|
31 namespace boost |
|
32 { |
|
33 |
|
34 |
|
35 template |
|
36 < |
|
37 class Fun |
|
38 #ifdef BOOST_NO_SFINAE |
|
39 , class Result = bool |
|
40 #endif |
|
41 > |
|
42 class indirect_fun |
|
43 { |
|
44 Fun fun; |
|
45 public: |
|
46 indirect_fun() : fun(Fun()) |
|
47 { } |
|
48 |
|
49 indirect_fun( Fun f ) : fun(f) |
|
50 { } |
|
51 |
|
52 template< class T > |
|
53 #ifdef BOOST_NO_SFINAE |
|
54 Result |
|
55 #else |
|
56 BOOST_DEDUCED_TYPENAME result_of< Fun( BOOST_DEDUCED_TYPENAME pointee<T>::type ) >::type |
|
57 #endif |
|
58 operator()( const T& r ) const |
|
59 { |
|
60 return fun( *r ); |
|
61 } |
|
62 |
|
63 template< class T, class U > |
|
64 #ifdef BOOST_NO_SFINAE |
|
65 Result |
|
66 #else |
|
67 BOOST_DEDUCED_TYPENAME result_of< Fun( BOOST_DEDUCED_TYPENAME pointee<T>::type, |
|
68 BOOST_DEDUCED_TYPENAME pointee<U>::type ) >::type |
|
69 #endif |
|
70 operator()( const T& r, const U& r2 ) const |
|
71 { |
|
72 return fun( *r, *r2 ); |
|
73 } |
|
74 }; |
|
75 |
|
76 template< class Fun > |
|
77 inline indirect_fun<Fun> make_indirect_fun( Fun f ) |
|
78 { |
|
79 return indirect_fun<Fun>( f ); |
|
80 } |
|
81 |
|
82 |
|
83 template |
|
84 < |
|
85 class Fun, |
|
86 class Arg1, |
|
87 class Arg2 = Arg1 |
|
88 #ifdef BOOST_NO_SFINAE |
|
89 , class Result = bool |
|
90 #endif |
|
91 > |
|
92 class void_ptr_indirect_fun |
|
93 { |
|
94 Fun fun; |
|
95 public: |
|
96 |
|
97 void_ptr_indirect_fun() : fun(Fun()) |
|
98 { } |
|
99 |
|
100 void_ptr_indirect_fun( Fun f ) : fun(f) |
|
101 { } |
|
102 #ifdef BOOST_NO_SFINAE |
|
103 Result |
|
104 #else |
|
105 BOOST_DEDUCED_TYPENAME result_of< Fun( Arg1 ) >::type |
|
106 #endif |
|
107 operator()( const void* r ) const |
|
108 { |
|
109 BOOST_ASSERT( r != 0 ); |
|
110 return fun( * static_cast<const Arg1*>( r ) ); |
|
111 } |
|
112 |
|
113 #ifdef BOOST_NO_SFINAE |
|
114 Result |
|
115 #else |
|
116 BOOST_DEDUCED_TYPENAME result_of< Fun( Arg1, Arg2 ) >::type |
|
117 #endif |
|
118 operator()( const void* l, const void* r ) const |
|
119 { |
|
120 BOOST_ASSERT( l != 0 && r != 0 ); |
|
121 return fun( * static_cast<const Arg1*>( l ), * static_cast<const Arg2*>( r ) ); |
|
122 } |
|
123 }; |
|
124 |
|
125 template< class Arg, class Fun > |
|
126 inline void_ptr_indirect_fun<Fun,Arg> make_void_ptr_indirect_fun( Fun f ) |
|
127 { |
|
128 return void_ptr_indirect_fun<Fun,Arg>( f ); |
|
129 } |
|
130 |
|
131 } // namespace 'boost' |
|
132 |
|
133 #endif |