6 * Use, modification and distribution are subject to the
7 * Boost Software License, Version 1.0. (See accompanying file
8 * LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
13 * LOCATION: see http://www.boost.org for most recent version.
14 * FILE regex_match.hpp
15 * VERSION see <boost/version.hpp>
16 * DESCRIPTION: Iterator traits for selecting an iterator type as
17 * an integral constant expression.
21 #ifndef BOOST_REGEX_ITERATOR_CATEGORY_HPP
22 #define BOOST_REGEX_ITERATOR_CATEGORY_HPP
25 #include <boost/type_traits/is_convertible.hpp>
26 #include <boost/type_traits/is_pointer.hpp>
35 typedef typename std::iterator_traits<I>::iterator_category cat;
37 BOOST_STATIC_CONSTANT(bool, value = (::boost::is_convertible<cat*, std::random_access_iterator_tag*>::value));
41 struct is_random_pointer_imp
43 BOOST_STATIC_CONSTANT(bool, value = true);
46 template <bool is_pointer_type>
47 struct is_random_imp_selector
52 typedef is_random_imp<I> type;
57 struct is_random_imp_selector<true>
62 typedef is_random_pointer_imp<I> type;
69 struct is_random_access_iterator
72 typedef detail::is_random_imp_selector< ::boost::is_pointer<I>::value> selector;
73 typedef typename selector::template rebind<I> bound_type;
74 typedef typename bound_type::type answer;
76 BOOST_STATIC_CONSTANT(bool, value = answer::value);
79 #ifndef BOOST_NO_INCLASS_MEMBER_INITIALIZATION
81 const bool is_random_access_iterator<I>::value;