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1 // Boost.Range library
2 //
3 // Copyright Thorsten Ottosen 2003-2004. Use, modification and
4 // distribution is subject to the Boost Software License, Version
5 // 1.0. (See accompanying file LICENSE_1_0.txt or copy at
6 // http://www.boost.org/LICENSE_1_0.txt)
7 //
8 // For more information, see http://www.boost.org/libs/range/
9 //
10
11 #ifndef BOOST_RANGE_DETAIL_BEGIN_HPP
12 #define BOOST_RANGE_DETAIL_BEGIN_HPP
13
14 #include <boost/config.hpp> // BOOST_MSVC
15 #include <boost/detail/workaround.hpp>
16 #include <boost/range/iterator.hpp>
17 #include <boost/range/detail/common.hpp>
18
19 namespace boost
20 {
21
22 namespace range_detail
23 {
24 template< typename T >
25 struct range_begin;
26
27 //////////////////////////////////////////////////////////////////////
28 // default
29 //////////////////////////////////////////////////////////////////////
30
31 template<>
32 struct range_begin<std_container_>
33 {
34 template< typename C >
35 BOOST_CONSTEXPR static BOOST_RANGE_DEDUCED_TYPENAME range_iterator<C>::type fun( C& c )
36 {
37 return c.begin();
38 };
39 };
40
41 //////////////////////////////////////////////////////////////////////
42 // pair
43 //////////////////////////////////////////////////////////////////////
44
45 template<>
46 struct range_begin<std_pair_>
47 {
48 template< typename P >
49 BOOST_CONSTEXPR static BOOST_RANGE_DEDUCED_TYPENAME range_iterator<P>::type fun( const P& p )
50 {
51 return p.first;
52 }
53 };
54
55 //////////////////////////////////////////////////////////////////////
56 // array
57 //////////////////////////////////////////////////////////////////////
58
59 template<>
60 struct range_begin<array_>
61 {
62 template<typename T>
63 BOOST_CONSTEXPR static BOOST_RANGE_DEDUCED_TYPENAME range_value<T>::type* fun(T& t)
64 {
65 return t;
66 }
67 };
68
69 } // namespace 'range_detail'
70
71 namespace range_adl_barrier
72 {
73 template< typename C >
74 BOOST_CONSTEXPR inline BOOST_RANGE_DEDUCED_TYPENAME range_iterator<C>::type
75 begin( C& c )
76 {
77 return range_detail::range_begin< BOOST_RANGE_DEDUCED_TYPENAME range_detail::range<C>::type >::fun( c );
78 }
79 }
80 } // namespace 'boost'
81
82
83 #endif