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>
34 #ifndef BOOST_NO_STD_ITERATOR_TRAITS
36 typedef typename std::iterator_traits<I>::iterator_category cat;
38 BOOST_STATIC_CONSTANT(bool, value = (::boost::is_convertible<cat*, std::random_access_iterator_tag*>::value));
40 BOOST_STATIC_CONSTANT(bool, value = false);
45 struct is_random_pointer_imp
47 BOOST_STATIC_CONSTANT(bool, value = true);
50 template <bool is_pointer_type>
51 struct is_random_imp_selector
56 typedef is_random_imp<I> type;
61 struct is_random_imp_selector<true>
66 typedef is_random_pointer_imp<I> type;
73 struct is_random_access_iterator
76 typedef detail::is_random_imp_selector< ::boost::is_pointer<I>::value> selector;
77 typedef typename selector::template rebind<I> bound_type;
78 typedef typename bound_type::type answer;
80 BOOST_STATIC_CONSTANT(bool, value = answer::value);
83 #ifndef BOOST_NO_INCLASS_MEMBER_INITIALIZATION
85 const bool is_random_access_iterator<I>::value;