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Author | SHA1 | Date | |
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597229b10b | |||
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79c6d11694 | |||
d5443d7fe2 | |||
41be2127df |
@ -1,159 +0,0 @@
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#ifndef BOOST_ITERATOR_CATEGORIES_HPP
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#define BOOST_ITERATOR_CATEGORIES_HPP
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#include <boost/config.hpp>
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#include <boost/type_traits/conversion_traits.hpp>
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#include <boost/type_traits/cv_traits.hpp>
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#include <boost/pending/ct_if.hpp>
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#include <boost/detail/iterator.hpp>
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namespace boost {
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// Return Type Categories
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struct readable_iterator_tag { };
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struct writable_iterator_tag { };
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struct swappable_iterator_tag { };
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struct mutable_lvalue_iterator_tag :
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virtual public writable_iterator_tag,
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virtual public readable_iterator_tag { };
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struct constant_lvalue_iterator_tag :
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virtual public readable_iterator_tag { };
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// Traversal Categories
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struct forward_traversal_tag { };
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struct bidirectional_traversal_tag : public forward_traversal_tag { };
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struct random_access_traversal_tag : public bidirectional_traversal_tag { };
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struct error_iterator_tag { };
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// Inherit from iterator_base if your iterator defines its own
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// return_category and traversal_category. Otherwise, the "old style"
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// iterator category will be mapped to the return_category and
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// traversal_category.
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struct new_iterator_base { };
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namespace detail {
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struct return_category_from_nested_type {
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template <typename Iterator> struct bind {
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typedef typename Iterator::return_category type;
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};
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};
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struct traversal_category_from_nested_type {
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template <typename Iterator> struct bind {
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typedef typename Iterator::traversal_category type;
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};
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};
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template <typename ValueType>
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struct choose_lvalue_return {
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typedef typename ct_if<is_const<ValueType>::value,
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boost::constant_lvalue_iterator_tag,
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boost::mutable_lvalue_iterator_tag>::type type;
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};
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template <typename Category, typename ValueType>
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struct iter_category_to_return {
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typedef typename ct_if<
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is_convertible<Category*, std::forward_iterator_tag*>::value,
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typename choose_lvalue_return<ValueType>::type,
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typename ct_if<
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is_convertible<Category*, std::input_iterator_tag*>::value,
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boost::readable_iterator_tag,
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typename ct_if<
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is_convertible<Category*, std::output_iterator_tag*>::value,
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boost::writable_iterator_tag,
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boost::error_iterator_tag
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>::type
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>::type
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>::type type;
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};
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template <typename Category>
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struct iter_category_to_traversal {
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typedef typename ct_if<
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is_convertible<Category*, std::random_access_iterator_tag*>::value,
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random_access_traversal_tag,
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typename ct_if<
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is_convertible<Category*, std::bidirectional_iterator_tag*>::value,
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bidirectional_traversal_tag,
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forward_traversal_tag
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>::type
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>::type type;
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};
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struct return_category_from_old_traits {
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template <typename Iterator> class bind {
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typedef boost::detail::iterator_traits<Iterator> OldTraits;
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typedef typename OldTraits::iterator_category Cat;
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typedef typename OldTraits::value_type value_type;
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public:
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typedef iter_category_to_return<Cat, value_type>::type type;
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};
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};
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struct traversal_category_from_old_traits {
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template <typename Iterator> class bind {
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typedef boost::detail::iterator_traits<Iterator> OldTraits;
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typedef typename OldTraits::iterator_category Cat;
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public:
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typedef iter_category_to_traversal<Cat>::type type;
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};
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};
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template <typename Iterator>
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class choose_return_category {
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typedef typename ct_if<is_convertible<Iterator*,
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new_iterator_base*>::value,
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return_category_from_nested_type,
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return_category_from_old_traits>::type Choice;
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public:
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typedef typename Choice:: template bind<Iterator>::type type;
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};
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template <typename Iterator>
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class choose_traversal_category {
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typedef typename ct_if<is_convertible<Iterator*,
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new_iterator_base*>::value,
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traversal_category_from_nested_type,
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traversal_category_from_old_traits>::type Choice;
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public:
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typedef typename Choice:: template bind<Iterator>::type type;
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};
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} // namespace detail
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template <class Iterator>
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struct return_category {
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typedef typename detail::choose_return_category<Iterator>::type type;
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};
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template <class Iterator>
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struct traversal_category {
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typedef typename detail::choose_traversal_category<Iterator>::type type;
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};
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#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
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template <typename T>
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struct return_category<T*>
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{
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typedef typename ct_if<is_const<T>::value,
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constant_lvalue_iterator_tag,
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mutable_lvalue_iterator_tag>::type type;
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};
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template <typename T>
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struct traversal_category<T*>
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{
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typedef random_access_traversal_tag type;
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};
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#endif
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} // namespace boost
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#endif // BOOST_ITERATOR_CATEGORIES_HPP
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@ -1,172 +0,0 @@
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#ifndef BOOST_ITERATOR_CONCEPTS_HPP
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#define BOOST_ITERATOR_CONCEPTS_HPP
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#include <boost/concept_check.hpp>
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#include <boost/iterator_categories.hpp>
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#include <boost/type_traits/conversion_traits.hpp>
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#include <boost/static_assert.hpp>
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namespace boost_concepts {
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// Used a different namespace here (instead of "boost") so that the
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// concept descriptions do not take for granted the names in
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// namespace boost.
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//===========================================================================
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// Iterator Access Concepts
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template <typename Iterator>
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class ReadableIteratorConcept {
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public:
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typedef typename std::iterator_traits<Iterator>::value_type value_type;
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typedef typename std::iterator_traits<Iterator>::reference reference;
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typedef typename boost::return_category<Iterator>::type return_category;
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void constraints() {
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boost::function_requires< boost::SGIAssignableConcept<Iterator> >();
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boost::function_requires< boost::EqualityComparableConcept<Iterator> >();
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boost::function_requires<
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boost::DefaultConstructibleConcept<Iterator> >();
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BOOST_STATIC_ASSERT((boost::is_convertible<return_category*,
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boost::readable_iterator_tag*>::value));
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reference r = *i; // or perhaps read(x)
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value_type v(r);
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boost::ignore_unused_variable_warning(v);
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}
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Iterator i;
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};
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template <typename Iterator, typename ValueType>
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class WritableIteratorConcept {
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public:
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typedef typename boost::return_category<Iterator>::type return_category;
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void constraints() {
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boost::function_requires< boost::SGIAssignableConcept<Iterator> >();
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boost::function_requires< boost::EqualityComparableConcept<Iterator> >();
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boost::function_requires<
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boost::DefaultConstructibleConcept<Iterator> >();
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BOOST_STATIC_ASSERT((boost::is_convertible<return_category*,
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boost::writable_iterator_tag*>::value));
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*i = v; // a good alternative could be something like write(x, v)
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}
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ValueType v;
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Iterator i;
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};
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template <typename Iterator>
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class ConstantLvalueIteratorConcept {
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public:
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typedef typename std::iterator_traits<Iterator>::value_type value_type;
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typedef typename std::iterator_traits<Iterator>::reference reference;
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typedef typename boost::return_category<Iterator>::type return_category;
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void constraints() {
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boost::function_requires< ReadableIteratorConcept<Iterator> >();
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BOOST_STATIC_ASSERT((boost::is_convertible<return_category*,
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boost::constant_lvalue_iterator_tag*>::value));
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BOOST_STATIC_ASSERT((boost::is_same<reference,
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const value_type&>::value));
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reference v = *i;
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boost::ignore_unused_variable_warning(v);
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}
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Iterator i;
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};
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template <typename Iterator>
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class MutableLvalueIteratorConcept {
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public:
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typedef typename std::iterator_traits<Iterator>::value_type value_type;
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typedef typename std::iterator_traits<Iterator>::reference reference;
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typedef typename boost::return_category<Iterator>::type return_category;
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void constraints() {
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boost::function_requires< ReadableIteratorConcept<Iterator> >();
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boost::function_requires<
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WritableIteratorConcept<Iterator, value_type> >();
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BOOST_STATIC_ASSERT((boost::is_convertible<return_category*,
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boost::mutable_lvalue_iterator_tag*>::value));
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BOOST_STATIC_ASSERT((boost::is_same<reference, value_type&>::value));
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reference v = *i;
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boost::ignore_unused_variable_warning(v);
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}
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Iterator i;
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};
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//===========================================================================
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// Iterator Traversal Concepts
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template <typename Iterator>
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class ForwardIteratorConcept {
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public:
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typedef typename boost::traversal_category<Iterator>::type traversal_category;
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void constraints() {
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boost::function_requires< boost::SGIAssignableConcept<Iterator> >();
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boost::function_requires< boost::EqualityComparableConcept<Iterator> >();
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boost::function_requires<
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boost::DefaultConstructibleConcept<Iterator> >();
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BOOST_STATIC_ASSERT((boost::is_convertible<traversal_category*,
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boost::forward_traversal_tag*>::value));
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++i;
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(void)i++;
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}
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Iterator i;
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};
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template <typename Iterator>
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class BidirectionalIteratorConcept {
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public:
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typedef typename boost::traversal_category<Iterator>::type traversal_category;
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void constraints() {
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boost::function_requires< ForwardIteratorConcept<Iterator> >();
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BOOST_STATIC_ASSERT((boost::is_convertible<traversal_category*,
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boost::bidirectional_traversal_tag*>::value));
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--i;
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(void)i--;
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}
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Iterator i;
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};
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template <typename Iterator>
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class RandomAccessIteratorConcept {
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public:
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typedef typename boost::traversal_category<Iterator>::type traversal_category;
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typedef typename std::iterator_traits<Iterator>::difference_type
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difference_type;
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void constraints() {
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boost::function_requires< BidirectionalIteratorConcept<Iterator> >();
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BOOST_STATIC_ASSERT((boost::is_convertible<traversal_category*,
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boost::random_access_traversal_tag*>::value));
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i += n;
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i = i + n;
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i = n + i;
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i -= n;
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i = i - n;
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n = i - j;
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}
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difference_type n;
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Iterator i, j;
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};
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} // namespace boost_concepts
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#endif // BOOST_ITERATOR_CONCEPTS_HPP
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@ -1,73 +0,0 @@
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#include <boost/iterator_concepts.hpp>
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#include <boost/operators.hpp>
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struct new_iterator
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: public boost::iterator<std::random_access_iterator_tag, int>,
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public boost::new_iterator_base
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{
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typedef boost::random_access_traversal_tag traversal_category;
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typedef boost::mutable_lvalue_iterator_tag return_category;
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int& operator*() const { return *m_x; }
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new_iterator& operator++() { return *this; }
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new_iterator operator++(int) { return *this; }
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new_iterator& operator--() { return *this; }
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new_iterator operator--(int) { return *this; }
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new_iterator& operator+=(std::ptrdiff_t) { return *this; }
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new_iterator operator+(std::ptrdiff_t) { return *this; }
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new_iterator& operator-=(std::ptrdiff_t) { return *this; }
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std::ptrdiff_t operator-(const new_iterator&) const { return 0; }
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new_iterator operator-(std::ptrdiff_t) const { return *this; }
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bool operator==(const new_iterator&) const { return false; }
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bool operator!=(const new_iterator&) const { return false; }
|
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bool operator<(const new_iterator&) const { return false; }
|
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int* m_x;
|
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};
|
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new_iterator operator+(std::ptrdiff_t, new_iterator x) { return x; }
|
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|
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struct old_iterator
|
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: public boost::iterator<std::random_access_iterator_tag, int>
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{
|
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int& operator*() const { return *m_x; }
|
||||
old_iterator& operator++() { return *this; }
|
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old_iterator operator++(int) { return *this; }
|
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old_iterator& operator--() { return *this; }
|
||||
old_iterator operator--(int) { return *this; }
|
||||
old_iterator& operator+=(std::ptrdiff_t) { return *this; }
|
||||
old_iterator operator+(std::ptrdiff_t) { return *this; }
|
||||
old_iterator& operator-=(std::ptrdiff_t) { return *this; }
|
||||
old_iterator operator-(std::ptrdiff_t) const { return *this; }
|
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std::ptrdiff_t operator-(const old_iterator&) const { return 0; }
|
||||
bool operator==(const old_iterator&) const { return false; }
|
||||
bool operator!=(const old_iterator&) const { return false; }
|
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bool operator<(const old_iterator&) const { return false; }
|
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int* m_x;
|
||||
};
|
||||
old_iterator operator+(std::ptrdiff_t, old_iterator x) { return x; }
|
||||
|
||||
int
|
||||
main()
|
||||
{
|
||||
#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
|
||||
boost::function_requires<
|
||||
boost_concepts::MutableLvalueIteratorConcept<int*> >();
|
||||
boost::function_requires<
|
||||
boost_concepts::RandomAccessIteratorConcept<int*> >();
|
||||
|
||||
boost::function_requires<
|
||||
boost_concepts::ConstantLvalueIteratorConcept<const int*> >();
|
||||
boost::function_requires<
|
||||
boost_concepts::RandomAccessIteratorConcept<const int*> >();
|
||||
#endif
|
||||
|
||||
boost::function_requires<
|
||||
boost_concepts::MutableLvalueIteratorConcept<new_iterator> >();
|
||||
boost::function_requires<
|
||||
boost_concepts::RandomAccessIteratorConcept<new_iterator> >();
|
||||
|
||||
boost::function_requires<
|
||||
boost_concepts::MutableLvalueIteratorConcept<old_iterator> >();
|
||||
boost::function_requires<
|
||||
boost_concepts::RandomAccessIteratorConcept<old_iterator> >();
|
||||
return 0;
|
||||
}
|
@ -1,160 +0,0 @@
|
||||
<html>
|
||||
<!--
|
||||
-- Copyright (c) Jeremy Siek 2000,2001
|
||||
--
|
||||
-- Permission to use, copy, modify, distribute and sell this software
|
||||
-- and its documentation for any purpose is hereby granted without fee,
|
||||
-- provided that the above copyright notice appears in all copies and
|
||||
-- that both that copyright notice and this permission notice appear
|
||||
-- in supporting documentation. I make no representations about the
|
||||
-- suitability of this software for any purpose. It is provided "as is"
|
||||
-- without express or implied warranty.
|
||||
-->
|
||||
<head>
|
||||
<title>Boost Iterator Traits</title>
|
||||
</head>
|
||||
|
||||
<BODY BGCOLOR="#ffffff" LINK="#0000ee" TEXT="#000000" VLINK="#551a8b"
|
||||
ALINK="#ff0000">
|
||||
<IMG SRC="../../../../c++boost.gif"
|
||||
ALT="C++ Boost" width="277" height="86">
|
||||
<BR Clear>
|
||||
|
||||
<h1>Boost Iterator Category Traits</h1>
|
||||
Header <tt><a href="../../boost/iterator_categories.hpp">boost/iterator_categories.hpp</a></tt>
|
||||
|
||||
<p>
|
||||
The <tt>boost::traversal_category</tt> and
|
||||
<tt>boost::return_category</tt> traits classes provides access to the
|
||||
category tags for iterators that model the Boost <a
|
||||
href="./iterator_concepts.htm">Iterator Concepts</a>, which are a
|
||||
replacement for the iterator requirements in the C++ standard. The
|
||||
other associated types of the Boost iterator concepts are accessed
|
||||
through the <tt>std::iterator_traits</tt> class.
|
||||
|
||||
<ul>
|
||||
<li><tt>traversal_category<Iter>::type</tt> Can the iterator go forward, backward, etc.?
|
||||
<li><tt>return_category<Iter>::type</tt> Is the iterator read or write only?
|
||||
Is the dereferenced type an lvalue?
|
||||
</ul>
|
||||
|
||||
<p>
|
||||
An important feature of the <tt>boost::traversal_category</tt> and
|
||||
<tt>boost::return_category</tt> classes is that they are <b>backwards
|
||||
compatible</b>, i.e., they automatically work for iterators for which
|
||||
there are valid definitions of <tt>std::iterator_traits</tt>. The old
|
||||
<tt>iterator_category</tt> is mapped to the appropriate traversal and
|
||||
return categories.
|
||||
|
||||
<p>
|
||||
When creating a new iterator type that is meant to work with
|
||||
<tt>boost::traversal_category</tt> and
|
||||
<tt>boost::return_category</tt>, you can either create a
|
||||
specialization of these classes for your iterator type, or you can
|
||||
provide all the necessary associated types as nested typedefs. In
|
||||
this case, your iterator class will need to inherit from
|
||||
<tt>new_iterator_base</tt> to let the category traits know
|
||||
that it will be able to find typedefs for <tt>traversal_category</tt>
|
||||
and <tt>return_category</tt> in you iterator class.
|
||||
|
||||
|
||||
Each of the new iterator requirements will need a category tag.
|
||||
|
||||
<pre>
|
||||
namespace boost {
|
||||
|
||||
// Return Type Categories
|
||||
struct readable_iterator_tag { };
|
||||
struct writable_iterator_tag { };
|
||||
struct swappable_iterator_tag { };
|
||||
struct mutable_lvalue_iterator_tag : virtual public writable_iterator_tag,
|
||||
virtual public readable_iterator_tag { };
|
||||
struct constant_lvalue_iterator_tag : public readable_iterator_tag { };
|
||||
|
||||
// Traversal Categories
|
||||
struct forward_traversal_tag { };
|
||||
struct bidirectional_traversal_tag : public forward_traversal_tag { };
|
||||
struct random_access_traversal_tag : public bidirectional_traversal_tag { };
|
||||
|
||||
}
|
||||
</pre>
|
||||
|
||||
<p>
|
||||
The following is pseudo-code for the iterator category traits classes.
|
||||
|
||||
<pre>
|
||||
namespace boost {
|
||||
|
||||
<i>// Inherit from iterator_base if your iterator defines its own
|
||||
// return_category and traversal_category. Otherwise, the "old style"
|
||||
// iterator category will be mapped to the return_category and
|
||||
// traversal_category.</i>
|
||||
struct new_iterator_base { };
|
||||
|
||||
template <typename Iterator>
|
||||
struct return_category
|
||||
{
|
||||
<b><i>// Pseudo-code</i></b>
|
||||
if (Iterator inherits from new_iterator_base) {
|
||||
typedef typename Iterator::return_category type;
|
||||
} else {
|
||||
typedef std::iterator_traits<Iterator> OldTraits;
|
||||
typedef typename OldTraits::iterator_category Cat;
|
||||
if (Cat inherits from std::forward_iterator_tag)
|
||||
if (is-const(T))
|
||||
typedef boost::constant_lvalue_iterator_tag type;
|
||||
else
|
||||
typedef boost::mutable_lvalue_iterator_tag type;
|
||||
else if (Cat inherits from std::input_iterator_tag)
|
||||
typedef boost::readable_iterator_tag type;
|
||||
else if (Cat inherits from std::output_iterator_tag)
|
||||
typedef boost::writable_iterator_tag type;
|
||||
}
|
||||
};
|
||||
|
||||
template <typename T>
|
||||
struct return_category<T*>
|
||||
{
|
||||
<b><i>// Pseudo-code</i></b>
|
||||
if (is-const(T))
|
||||
typedef boost::constant_lvalue_iterator_tag type;
|
||||
else
|
||||
typedef boost::mutable_lvalue_iterator_tag type;
|
||||
};
|
||||
|
||||
template <typename Iterator>
|
||||
struct traversal_category
|
||||
{
|
||||
<b><i>// Pseudo-code</i></b>
|
||||
if (Iterator inherits from new_iterator_base) {
|
||||
typedef typename Iterator::traversal_category type;
|
||||
} else {
|
||||
typedef std::iterator_traits<Iterator> OldTraits;
|
||||
typedef typename OldTraits::iterator_category Cat;
|
||||
|
||||
if (Cat inherits from std::random_access_iterator_tag)
|
||||
typedef boost::random_access_traversal_tag type;
|
||||
else if (Cat inherits from std::bidirectional_iterator_tag)
|
||||
typedef boost::bidirectional_traversal_tag type;
|
||||
else if (Cat inherits from std::forward_iterator_tag)
|
||||
typedef boost::forward_traversal_tag type;
|
||||
}
|
||||
};
|
||||
|
||||
template <typename T>
|
||||
struct traversal_category<T*>
|
||||
{
|
||||
typedef boost::random_access_traversal_tag type;
|
||||
};
|
||||
|
||||
}
|
||||
</pre>
|
||||
|
||||
<hr>
|
||||
<address><a href="mailto:jsiek@lsc.nd.edu">jeremy siek</a></address>
|
||||
<!-- Created: Sun Mar 18 14:06:57 EST 2001 -->
|
||||
<!-- hhmts start -->
|
||||
Last modified: Mon Mar 19 12:59:30 EST 2001
|
||||
<!-- hhmts end -->
|
||||
</body>
|
||||
</html>
|
@ -1,37 +0,0 @@
|
||||
#FIG 3.2
|
||||
Landscape
|
||||
Center
|
||||
Inches
|
||||
Letter
|
||||
100.00
|
||||
Single
|
||||
-2
|
||||
1200 2
|
||||
6 150 2325 4275 4350
|
||||
2 1 0 1 0 7 100 0 -1 4.000 0 0 -1 1 0 2
|
||||
1 1 1.00 60.00 120.00
|
||||
1725 4050 1725 3450
|
||||
2 1 0 1 0 7 100 0 -1 4.000 0 0 -1 1 0 2
|
||||
1 1 1.00 60.00 120.00
|
||||
1725 3150 1725 2550
|
||||
4 0 0 100 0 19 18 0.0000 4 210 3180 375 2550 ForwardTraversalIterator\001
|
||||
4 0 0 100 0 19 18 0.0000 4 210 3765 225 3450 BidirectionalTraversalIterator\001
|
||||
4 0 0 100 0 19 18 0.0000 4 210 4125 150 4350 RandomAccessTraversalIterator\001
|
||||
-6
|
||||
2 1 0 1 0 7 50 0 -1 0.000 0 0 -1 1 0 2
|
||||
1 1 1.00 60.00 120.00
|
||||
4800 3600 4800 2400
|
||||
2 1 0 1 0 7 50 0 -1 0.000 0 0 -1 1 0 2
|
||||
1 1 1.00 60.00 120.00
|
||||
6900 3000 5400 2400
|
||||
2 1 0 1 0 7 50 0 -1 0.000 0 0 -1 1 0 2
|
||||
1 1 1.00 60.00 120.00
|
||||
6900 3000 7500 2400
|
||||
2 1 0 1 0 7 50 0 -1 0.000 0 0 -1 1 0 2
|
||||
1 1 1.00 60.00 120.00
|
||||
6900 3000 9075 2475
|
||||
4 0 0 100 0 19 18 0.0000 4 210 2040 6600 2400 WritableIterator\001
|
||||
4 0 0 100 0 19 18 0.0000 4 210 2145 3900 2400 ReadableIterator\001
|
||||
4 0 0 50 0 19 18 0.0000 4 210 2835 5700 3300 MutableLvalueIterator\001
|
||||
4 0 0 50 0 19 18 0.0000 4 270 2355 9075 2400 SwappableIterator\001
|
||||
4 0 0 50 0 19 18 0.0000 4 210 2970 3825 3900 ConstantLvalueIterator\001
|
Binary file not shown.
Before Width: | Height: | Size: 3.2 KiB |
@ -1,663 +0,0 @@
|
||||
<HTML>
|
||||
<!--
|
||||
-- Copyright (c) Jeremy Siek 2000
|
||||
--
|
||||
-- Permission to use, copy, modify, distribute and sell this software
|
||||
-- and its documentation for any purpose is hereby granted without fee,
|
||||
-- provided that the above copyright notice appears in all copies and
|
||||
-- that both that copyright notice and this permission notice appear
|
||||
-- in supporting documentation. I make no representations about the
|
||||
-- suitability of this software for any purpose. It is provided "as is"
|
||||
-- without express or implied warranty.
|
||||
-->
|
||||
<!--
|
||||
-- Copyright (c) 1996-1999
|
||||
-- Silicon Graphics Computer Systems, Inc.
|
||||
--
|
||||
-- Permission to use, copy, modify, distribute and sell this software
|
||||
-- and its documentation for any purpose is hereby granted without fee,
|
||||
-- provided that the above copyright notice appears in all copies and
|
||||
-- that both that copyright notice and this permission notice appear
|
||||
-- in supporting documentation. Silicon Graphics makes no
|
||||
-- representations about the suitability of this software for any
|
||||
-- purpose. It is provided "as is" without express or implied warranty.
|
||||
--
|
||||
-- Copyright (c) 1994
|
||||
-- Hewlett-Packard Company
|
||||
--
|
||||
-- Permission to use, copy, modify, distribute and sell this software
|
||||
-- and its documentation for any purpose is hereby granted without fee,
|
||||
-- provided that the above copyright notice appears in all copies and
|
||||
-- that both that copyright notice and this permission notice appear
|
||||
-- in supporting documentation. Hewlett-Packard Company makes no
|
||||
-- representations about the suitability of this software for any
|
||||
-- purpose. It is provided "as is" without express or implied warranty.
|
||||
--
|
||||
-->
|
||||
<Head>
|
||||
<Title>Iterator Concepts</Title>
|
||||
<BODY BGCOLOR="#ffffff" LINK="#0000ee" TEXT="#000000" VLINK="#551a8b"
|
||||
ALINK="#ff0000">
|
||||
<IMG SRC="../../../../c++boost.gif"
|
||||
ALT="C++ Boost" width="277" height="86">
|
||||
|
||||
<BR Clear>
|
||||
|
||||
|
||||
<h1>Iterator Concepts</h1>
|
||||
|
||||
<p>The standard iterator categories and requirements are flawed because
|
||||
they use a single hierarchy of requirements to address two orthogonal
|
||||
issues: <b><i>iterator traversal</i></b> and <b><i>dereference return
|
||||
type</i></b>. The current iterator requirement hierarchy is mainly
|
||||
geared towards iterator traversal (hence the category names), while
|
||||
requirements that address dereference return type sneak in at various
|
||||
places.
|
||||
|
||||
<p>
|
||||
The iterator requirements should be separated into two hierarchies.
|
||||
One set of concepts handles the return type semantics:
|
||||
<ul>
|
||||
<li><a href="#concept:ReadableIterator">Readable Iterator</a></li>
|
||||
<li><a href="#concept:WritableIterator">Writable Iterator</a></li>
|
||||
<li><a href="#concept:SwappableIterator">Swappable Iterator</a></li>
|
||||
<li><a href="#concept:ConstantLvalueIterator">Constant Lvalue Iterator</a></li>
|
||||
<li><a href="#concept:MutableLvalueIterator">Mutable Lvalue Iterator</a></li>
|
||||
</ul>
|
||||
|
||||
The other set of concepts handles iterator traversal:
|
||||
|
||||
<ul>
|
||||
<li><a href="#concept:ForwardTraversalIterator">Forward Traversal Iterator</a></li>
|
||||
<li><a href="#concept:BidirectionalTraversalIterator">Bidirectional Traversal Iterator</a></li>
|
||||
<li><a href="#concept:RandomAccessTraversalIterator">Random Access Traversal Iterator</a></li>
|
||||
</ul>
|
||||
|
||||
The current Input Iterator and Output Iterator requirements will
|
||||
continue to be used as is. Note that Input Iterator implies Readable
|
||||
Iterator and Output Iterator implies Writable Iterator.
|
||||
|
||||
<p>
|
||||
Note: we considered defining a Single-Pass Iterator, which could be
|
||||
combined with Readable or Writable Iterator to replace the Input and
|
||||
Output Iterator requirements. We rejected this idea because there are
|
||||
some differences between Input and Output Iterators that make it hard
|
||||
to merge them: for example Input Iterator requires Equality Comparable
|
||||
while Output Iterator does not.
|
||||
|
||||
|
||||
<p></p>
|
||||
<DIV ALIGN="CENTER"><A NAME="fig:graph-concepts"></A></A>
|
||||
<TABLE>
|
||||
<CAPTION ALIGN="TOP"><STRONG>Figure 1:</STRONG>
|
||||
The iterator concepts and refinement relationships.
|
||||
</CAPTION>
|
||||
<TR><TD><IMG SRC="./iterator_concepts.gif" ></TD></TR>
|
||||
</TABLE>
|
||||
</DIV>
|
||||
<p></p>
|
||||
|
||||
|
||||
<h2>Relationship with the standard iterator concepts</h2>
|
||||
|
||||
<p>
|
||||
std::Input Iterator implies boost::ReadableIterator.
|
||||
|
||||
<p>
|
||||
std::Output Iterator implies boost::Writable Iterator.
|
||||
|
||||
<p>
|
||||
std::Forward Iterator refines boost::Forward Iterator and
|
||||
boost::Constant Lvalue Iterator or boost::Mutable Lvalue Iterator.
|
||||
|
||||
<p>
|
||||
std::Bidirectional Iterator refines boost::Bidirectional Iterator and
|
||||
boost::Constant Lvalue Iterator or boost::Mutable Lvalue Iterator.
|
||||
|
||||
<p>
|
||||
std::Random Access Iterator refines boost::Random Access Iterator and
|
||||
boost::Constant Lvalue Iterator or boost::Mutable Lvalue Iterator.
|
||||
|
||||
|
||||
<h3>Notation</h3>
|
||||
<Table>
|
||||
<tr>
|
||||
<td><tt>X</tt></td>
|
||||
<td>The iterator type.</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><tt>T</tt></td>
|
||||
<td>The value type of <tt>X</tt>, i.e., <tt>std::iterator_traits<X>::value_type</tt>.</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><tt>x</tt>, <tt>y</tt></td>
|
||||
<td>An object of type <tt>X</tt>.</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><tt>t</tt></td>
|
||||
<td>An object of type <tt>T</tt>.</td>
|
||||
</tr>
|
||||
</table>
|
||||
|
||||
<p>
|
||||
|
||||
<hr>
|
||||
<!--------------------------------------------------------------------------->
|
||||
|
||||
<H3><A NAME="concept:ReadableIterator"></A>
|
||||
Readable Iterator
|
||||
</H3>
|
||||
|
||||
A Readable Iterator is an iterator that dereferences to produce an
|
||||
rvalue that is convertible to the <tt>value_type</tt> of the
|
||||
iterator.
|
||||
|
||||
<h3>Associated Types</h3>
|
||||
|
||||
<Table border>
|
||||
|
||||
<tr>
|
||||
<td>Value type</td>
|
||||
<td><tt>std::iterator_traits<X>::value_type</tt></td>
|
||||
<td>The type of the objects pointed to by the iterator.</td>
|
||||
</tr>
|
||||
|
||||
<tr>
|
||||
<td>Reference type</td>
|
||||
<td><tt>std::iterator_traits<X>::reference</tt></td>
|
||||
<td>
|
||||
The return type of dereferencing the iterator. This
|
||||
type must be convertible to <tt>T</tt>.
|
||||
</td>
|
||||
</tr>
|
||||
|
||||
<tr>
|
||||
<td>Return Category</td>
|
||||
<td><tt>std::return_category<X>::type</tt></td>
|
||||
<td>
|
||||
A type convertible to <tt>std::readable_iterator_tag</tt>
|
||||
</td>
|
||||
</tr>
|
||||
|
||||
</Table>
|
||||
|
||||
<h3>Refinement of</h3>
|
||||
|
||||
<A href="http://www.boost.org/libs/utility/CopyConstructible.html">Copy Constructible</A>
|
||||
|
||||
<h3>Valid expressions</h3>
|
||||
|
||||
<Table border>
|
||||
<tr><TH>Name</TH><TH>Expression</TH><TH>Type requirements</TH><TH>Return type</TH></tr>
|
||||
<tr>
|
||||
<td>Dereference</td>
|
||||
<td><tt>*x</tt></td>
|
||||
<td> </td>
|
||||
<td><tt>std::iterator_traits<X>::reference</tt></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>Member access</td>
|
||||
<td><tt>x->m</tt></td>
|
||||
<td><tt>T</tt> is a type with a member named <tt>m</tt>.</td>
|
||||
<td>
|
||||
If <tt>m</tt> is a data member, the type of <tt>m</tt>.
|
||||
If <tt>m</tt> is a member function, the return type of <tt>m</tt>.
|
||||
</td>
|
||||
</tr>
|
||||
</table>
|
||||
|
||||
<p>
|
||||
|
||||
<hr>
|
||||
<!--------------------------------------------------------------------------->
|
||||
|
||||
<H3><A NAME="concept:WritableIterator"></A>
|
||||
Writable Iterator
|
||||
</H3>
|
||||
|
||||
A Writable Iterator is an iterator that can be used to store a value
|
||||
using the dereference-assignment expression.
|
||||
|
||||
<h3>Definitions</h3>
|
||||
|
||||
If <tt>x</tt> is an Writable Iterator of type <tt>X</tt>, then the
|
||||
expression <tt>*x = a;</tt> stores the value <tt>a</tt> into
|
||||
<tt>x</tt>. Note that <tt>operator=</tt>, like other C++ functions,
|
||||
may be overloaded; it may, in fact, even be a template function. In
|
||||
general, then, <tt>a</tt> may be any of several different types. A
|
||||
type <tt>A</tt> belongs to the <i>set of value types</i> of <tt>X</tt>
|
||||
if, for an object <tt>a</tt> of type <tt>A</tt>, <tt>*x = a;</tt> is
|
||||
well-defined and does not require performing any non-trivial
|
||||
conversions on <tt>a</tt>.
|
||||
|
||||
<h3>Associated Types</h3>
|
||||
|
||||
<Table border>
|
||||
|
||||
<tr>
|
||||
<td>Return Category</td>
|
||||
<td><tt>std::return_category<X>::type</tt></td>
|
||||
<td>
|
||||
A type convertible to <tt>std::writable_iterator_tag</tt>
|
||||
</td>
|
||||
</tr>
|
||||
|
||||
</Table>
|
||||
|
||||
|
||||
|
||||
<h3>Refinement of</h3>
|
||||
|
||||
<A href="http://www.boost.org/libs/utility/CopyConstructible.html">Copy Constructible</A>
|
||||
|
||||
<h3>Valid expressions</h3>
|
||||
|
||||
<Table border>
|
||||
<tr>
|
||||
<TH>Name</TH><TH>Expression</TH><TH>Return type</TH>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>Dereference assignment</td>
|
||||
<td><tt>*x = a</tt></td>
|
||||
<td>unspecified</td>
|
||||
</tr>
|
||||
</table>
|
||||
|
||||
<p>
|
||||
|
||||
|
||||
<hr>
|
||||
<!--------------------------------------------------------------------------->
|
||||
|
||||
<H3><A NAME="concept:SwappableIterator"></A>
|
||||
Swappable Iterator
|
||||
</H3>
|
||||
|
||||
A Swappable Iterator is an iterator whose dereferenced values can be
|
||||
swapped.
|
||||
|
||||
<p>
|
||||
Note: the requirements for Swappable Iterator are dependent on the
|
||||
issues surrounding <tt>std::swap()</tt> being resolved. Here we assume
|
||||
that the issue will be resolved by allowing the overload of
|
||||
<tt>std::swap()</tt> for user-defined types.
|
||||
|
||||
<p>
|
||||
Note: Readable Iterator and Writable Iterator combined implies
|
||||
Swappable Iterator because of the fully templated
|
||||
<tt>std::swap()</tt>. However, Swappable Iterator does not imply
|
||||
Readable Iterator nor Writable Iterator.
|
||||
|
||||
<h3>Associated Types</h3>
|
||||
|
||||
<Table border>
|
||||
|
||||
<tr>
|
||||
<td>Return Category</td>
|
||||
<td><tt>std::return_category<X>::type</tt></td>
|
||||
<td>
|
||||
A type convertible to <tt>std::swappable_iterator_tag</tt>
|
||||
</td>
|
||||
</tr>
|
||||
|
||||
</Table>
|
||||
|
||||
|
||||
<h3>Valid expressions</h3>
|
||||
|
||||
Of the two valid expressions listed below, only one <b>OR</b> the
|
||||
other is required. If <tt>std::iter_swap()</tt> is overloaded for
|
||||
<tt>X</tt> then <tt>std::swap()</tt> is not required. If
|
||||
<tt>std::iter_swap()</tt> is not overloaded for <tt>X</tt> then the
|
||||
default (fully templated) version is used, which will call
|
||||
<tt>std::swap()</tt> (this means changing the current requirements for
|
||||
<tt>std::iter_swap()</tt>).
|
||||
|
||||
<p>
|
||||
<Table border>
|
||||
<tr>
|
||||
<TH>Name</TH><TH>Expression</TH><TH>Return type</TH>
|
||||
</tr>
|
||||
|
||||
<tr>
|
||||
<td>Iterator Swap</td>
|
||||
<td><tt>std::iter_swap(x, y)</tt></td>
|
||||
<td>void</td>
|
||||
</tr>
|
||||
|
||||
<tr>
|
||||
<td>Dereference and Swap</td>
|
||||
<td><tt>std::swap(*x, *y)</tt></td>
|
||||
<td>void</td>
|
||||
</tr>
|
||||
|
||||
</table>
|
||||
|
||||
<p>
|
||||
|
||||
|
||||
<hr>
|
||||
<!--------------------------------------------------------------------------->
|
||||
|
||||
<H3><A NAME="concept:ConstantLvalueIterator"></A>
|
||||
Constant Lvalue Iterator
|
||||
</H3>
|
||||
|
||||
A Constant Lvalue Iterator is an iterator that dereferences to produce a
|
||||
const reference to the pointed-to object, i.e., the associated
|
||||
<tt>reference</tt> type is <tt>const T&</tt>. Changing the value
|
||||
of or destroying an iterator that models Constant Lvalue Iterator does
|
||||
not invalidate pointers and references previously obtained from that
|
||||
iterator.
|
||||
|
||||
|
||||
<h3>Refinement of</h3>
|
||||
|
||||
<a href="#concept:ReadableIterator">Readable Iterator</a>
|
||||
|
||||
<h3>Associated Types</h3>
|
||||
|
||||
<Table border>
|
||||
|
||||
<tr>
|
||||
<td>Reference type</td>
|
||||
<td><tt>std::iterator_traits<X>::reference</tt></td>
|
||||
<td>
|
||||
The return type of dereferencing the iterator, which must be
|
||||
<tt>const T&</tt>.
|
||||
</td>
|
||||
</tr>
|
||||
|
||||
<!-- I don't think this is needed
|
||||
<tr>
|
||||
<td>Pointer type</td>
|
||||
<td><tt>std::iterator_traits<X>::pointer</tt></td>
|
||||
<td>
|
||||
The pointer to the value type, which must be <tt>const T*</tt>.
|
||||
</td>
|
||||
</tr>
|
||||
-->
|
||||
|
||||
<tr>
|
||||
<td>Return Category</td>
|
||||
<td><tt>std::return_category<X>::type</tt></td>
|
||||
<td>
|
||||
A type convertible to <tt>std::constant_lvalue_iterator_tag</tt>
|
||||
</td>
|
||||
</tr>
|
||||
|
||||
</table>
|
||||
|
||||
<!-- these are not necessary now that we use reference as operator* return type
|
||||
<h3>Valid expressions</h3>
|
||||
|
||||
<Table border>
|
||||
<tr><TH>Name</TH><TH>Expression</TH><TH>Type requirements</TH><TH>Return type</TH></tr>
|
||||
<tr>
|
||||
<td>Dereference</td>
|
||||
<td><tt>*x</tt></td>
|
||||
<td> </td>
|
||||
<td><tt>std::iterator_traits<X>::reference</tt></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>Member access</td>
|
||||
<td><tt>x->m</tt></td>
|
||||
<td><tt>T</tt> is a type with a member named <tt>m</tt>.</td>
|
||||
<td>
|
||||
|
||||
</td>
|
||||
</tr>
|
||||
</table>
|
||||
|
||||
-->
|
||||
|
||||
<p>
|
||||
|
||||
<hr>
|
||||
<!--------------------------------------------------------------------------->
|
||||
|
||||
<H3><A NAME="concept:MutableLvalueIterator"></A>
|
||||
Mutable Lvalue Iterator
|
||||
</H3>
|
||||
|
||||
A Mutable Lvalue Iterator is an iterator that dereferences to produce a
|
||||
reference to the pointed-to object. The associated <tt>reference</tt>
|
||||
type is <tt>T&</tt>. Changing the value of or destroying an
|
||||
iterator that models Mutable Lvalue Iterator does not invalidate
|
||||
pointers and references previously obtained from that iterator.
|
||||
|
||||
<h3>Refinement of</h3>
|
||||
|
||||
<a href="#concept:ReadableIterator">Readable Iterator</a>,
|
||||
<a href="#concept:WritableIterator">Writable Iterator</a>,
|
||||
and <a href="#concept:SwappableIterator">Swappable Iterator</a>.
|
||||
|
||||
|
||||
|
||||
<h3>Associated Types</h3>
|
||||
|
||||
<Table border>
|
||||
|
||||
<tr>
|
||||
<td>Reference type</td>
|
||||
<td><tt>std::iterator_traits<X>::reference</tt></td>
|
||||
<td>The return type of dereferencing the iterator, which must be
|
||||
<tt>T&</tt>.</td>
|
||||
</tr>
|
||||
|
||||
<!-- I don't think this is necessary
|
||||
<tr>
|
||||
<td>Pointer type</td>
|
||||
<td><tt>std::iterator_traits<X>::pointer</tt></td>
|
||||
<td>
|
||||
The pointer to the value type, which is <tt>T*</tt>.
|
||||
</td>
|
||||
</tr>
|
||||
-->
|
||||
|
||||
<tr>
|
||||
<td>Return Category</td>
|
||||
<td><tt>std::return_category<X>::type</tt></td>
|
||||
<td>
|
||||
A type convertible to <tt>std::mutable_lvalue_iterator_tag</tt>
|
||||
</td>
|
||||
</tr>
|
||||
|
||||
</table>
|
||||
|
||||
<!-- no longer needed since the return type is specified as reference in the readable iterator
|
||||
<h3>Valid expressions</h3>
|
||||
|
||||
<Table border>
|
||||
<tr><TH>Name</TH><TH>Expression</TH><TH>Type requirements</TH><TH>Return type</TH></tr>
|
||||
<tr>
|
||||
<td>Dereference</td>
|
||||
<td><tt>*x</tt></td>
|
||||
<td> </td>
|
||||
<td><tt>std::iterator_traits<X>::reference</tt></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>Member access</td>
|
||||
<td><tt>x->m</tt></td>
|
||||
<td><tt>T</tt> is a type with a member named <tt>m</tt>.</td>
|
||||
<td>
|
||||
|
||||
</td>
|
||||
</tr>
|
||||
</table>
|
||||
|
||||
-->
|
||||
|
||||
<p>
|
||||
<hr>
|
||||
<!--------------------------------------------------------------------------->
|
||||
|
||||
<H3><A NAME="concept:ForwardTraversalIterator"></A>
|
||||
Forward Traversal Iterator
|
||||
</H3>
|
||||
|
||||
The Forward Iterator is an iterator that can be incremented. Also, it
|
||||
is permissible to make multiple passes through the iterator's range.
|
||||
|
||||
<h3>Refinement of</h3>
|
||||
|
||||
<A href="http://www.boost.org/libs/utility/CopyConstructible.html">Copy Constructible</A>,
|
||||
<A href="http://www.boost.org/libs/utility/Assignable.html">Assignable</A>,
|
||||
<A href="http://www.sgi.com/tech/stl/DefaultConstructible.html">Default Constructible</A>, and
|
||||
<A href="http://www.sgi.com/tech/stl/EqualityComparable.html">Equality Comparable</A>
|
||||
|
||||
|
||||
<h3>Associated types</h3>
|
||||
|
||||
<Table border>
|
||||
|
||||
<tr>
|
||||
<td>Difference Type</td>
|
||||
<td><tt>std::iterator_traits<X>::difference_type</tt></td>
|
||||
<td>
|
||||
A signed integral type used for representing distances
|
||||
between iterators that point into the same range.
|
||||
</td>
|
||||
</tr>
|
||||
|
||||
<tr>
|
||||
<td>Traversal Category</td>
|
||||
<td><tt>std::traversal_category<X>::type</tt></td>
|
||||
<td>
|
||||
A type convertible to <tt>std::forward_traversal_tag</tt>
|
||||
</td>
|
||||
</tr>
|
||||
</Table>
|
||||
|
||||
<h3>Valid expressions</h3>
|
||||
|
||||
<Table border>
|
||||
<tr>
|
||||
<TH>Name</TH><TH>Expression</TH><TH>Type requirements</TH>
|
||||
<TH>Return type</TH>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>Preincrement</td>
|
||||
<td><tt>++i</tt></td><td> </td><td><tt>X&</tt></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>Postincrement</td>
|
||||
<td><tt>i++</tt></td><td> </td><td>convertible to <tt>const X&</tt></td>
|
||||
</tr>
|
||||
</Table>
|
||||
|
||||
<p>
|
||||
<hr>
|
||||
<!--------------------------------------------------------------------------->
|
||||
|
||||
<H3><A NAME="concept:BidirectionalTraversalIterator"></A>
|
||||
Bidirectional Traversal Iterator
|
||||
</H3>
|
||||
|
||||
An iterator that can be incremented and decremented.
|
||||
|
||||
<h3>Refinement of</h3>
|
||||
|
||||
<a href="#concept:ForwardTraversalIterator">Forward Traversal Iterator</a>
|
||||
|
||||
<h3>Associated types</h3>
|
||||
|
||||
<Table border>
|
||||
<tr>
|
||||
<td>Traversal Category</td>
|
||||
<td><tt>std::traversal_category<X>::type</tt></td>
|
||||
<td>
|
||||
A type convertible to <tt>std::bidirectional_traversal_tag</tt>
|
||||
</td>
|
||||
</tr>
|
||||
</Table>
|
||||
|
||||
<h3>Valid expressions</h3>
|
||||
|
||||
<Table border>
|
||||
<tr>
|
||||
<TH>Name</TH><TH>Expression</TH><TH>Type requirements</TH>
|
||||
<TH>Return type</TH>
|
||||
</tr>
|
||||
<tr><td>Predecrement</td>
|
||||
<td><tt>--i</tt></td><td> </td><td><tt>X&</tt></td>
|
||||
</tr>
|
||||
<tr><td>Postdecrement</td>
|
||||
<td><tt>i--</tt></td><td> </td><td>convertible to <tt>const X&</tt></td>
|
||||
</tr>
|
||||
</table>
|
||||
|
||||
<p>
|
||||
<hr>
|
||||
<!--------------------------------------------------------------------------->
|
||||
|
||||
<H3><A NAME="concept:RandomAccessTraversalIterator"></A>
|
||||
Random Access Traversal Iterator
|
||||
</H3>
|
||||
|
||||
An iterator that provides constant-time methods for moving forward and
|
||||
backward in arbitrary-sized steps.
|
||||
|
||||
<h3>Refinement of</h3>
|
||||
|
||||
<a href="#concept:BidirectionalTraversalIterator">Bidirectional Traversal Iterator</a> and
|
||||
<A href="http://www.sgi.com/tech/stl/LessThanComparable.html">Less Than Comparable</A> where <tt><</tt> is a total ordering
|
||||
|
||||
<h3>Associated types</h3>
|
||||
|
||||
<Table border>
|
||||
<tr>
|
||||
<td>Traversal Category</td>
|
||||
<td><tt>std::traversal_category<X>::type</tt></td>
|
||||
<td>
|
||||
A type convertible to <tt>std::random_access_traversal_tag</tt>
|
||||
</td>
|
||||
</tr>
|
||||
</Table>
|
||||
|
||||
<h3>Valid expressions</h3>
|
||||
|
||||
<Table border>
|
||||
<tr><TH>Name</TH><TH>Expression</TH><TH>Type requirements</TH>
|
||||
<TH>Return type</TH>
|
||||
</tr>
|
||||
<tr><td>Iterator addition</td>
|
||||
<td><tt>i += n</tt></td><td> </td><td><tt>X&</tt></td>
|
||||
</tr>
|
||||
<tr><td>Iterator addition</td>
|
||||
<td><tt>i + n</tt> or <tt>n + i</tt></td><td> </td><td><tt>X</tt></td>
|
||||
</tr>
|
||||
<tr><td>Iterator subtraction</td>
|
||||
<td><tt>i -= n</tt></td><td> </td><td><tt>X&</tt></td>
|
||||
</tr>
|
||||
<tr><td>Iterator subtraction</td>
|
||||
<td><tt>i - n</tt></td><td> </td><td><tt>X</tt></td>
|
||||
</tr>
|
||||
<tr><td>Difference</td>
|
||||
<td><tt>i - j</tt></td><td> </td><td><tt>std::iterator_traits<X>::difference_type</tt></td>
|
||||
</tr>
|
||||
<tr><td>Element operator</td>
|
||||
<td><tt>i[n]</tt></td>
|
||||
<td><tt>X</tt> must also be a model of
|
||||
<a href="#concept:ReadableIterator">Readable Iterator</a>. </td>
|
||||
<td><tt>std::iterator_traits<X>::reference</tt></td>
|
||||
</tr>
|
||||
<tr><td>Element assignment</td>
|
||||
<td><tt>i[n] = t</tt></td>
|
||||
<td><tt>X</tt> must also be a model of
|
||||
<a href="#concept:WritableIterator">Writable Iterator</a>.</td>
|
||||
<td>unspecified</td>
|
||||
</tr>
|
||||
</table>
|
||||
|
||||
<p>
|
||||
|
||||
<HR>
|
||||
<TABLE>
|
||||
<TR valign=top>
|
||||
<TD nowrap>Copyright © 2000</TD><TD>
|
||||
<A HREF="../../../../people/jeremy_siek.htm">Jeremy Siek</A>, Univ.of Notre Dame (<A HREF="mailto:jsiek@lsc.nd.edu">jsiek@lsc.nd.edu</A>)
|
||||
</TD></TR></TABLE>
|
||||
|
||||
</body>
|
||||
</html>
|
@ -135,7 +135,15 @@ namespace detail {
|
||||
// For a while, this wasn't true, but we rely on it below. This is a regression assert.
|
||||
BOOST_STATIC_ASSERT(::boost::is_integral<char>::value);
|
||||
# ifndef BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS
|
||||
BOOST_STATIC_CONSTANT(bool, value = std::numeric_limits<T>::is_specialized);
|
||||
# if defined(ULLONG_MAX) || defined(ULONG_LONG_MAX)
|
||||
BOOST_STATIC_CONSTANT(bool,
|
||||
value = (
|
||||
std::numeric_limits<T>::is_specialized
|
||||
| boost::is_same<T,long long>::value
|
||||
| boost::is_same<T,unsigned long long>::value));
|
||||
# else
|
||||
BOOST_STATIC_CONSTANT(bool, value = std::numeric_limits<T>::is_specialized);
|
||||
# endif
|
||||
# else
|
||||
# if !defined(__BORLANDC__)
|
||||
BOOST_STATIC_CONSTANT(bool, value = (
|
||||
@ -173,14 +181,17 @@ struct counting_iterator_traits {
|
||||
template <class Incrementable>
|
||||
struct counting_iterator_policies : public default_iterator_policies
|
||||
{
|
||||
const Incrementable& dereference(type<const Incrementable&>, const Incrementable& i) const
|
||||
{ return i; }
|
||||
|
||||
template <class Difference, class Iterator1, class Iterator2>
|
||||
Difference distance(type<Difference>, const Iterator1& x,
|
||||
const Iterator2& y) const
|
||||
template <class IteratorAdaptor>
|
||||
typename IteratorAdaptor::reference dereference(const IteratorAdaptor& i) const
|
||||
{ return i.base(); }
|
||||
|
||||
template <class Iterator1, class Iterator2>
|
||||
typename Iterator1::difference_type distance(
|
||||
const Iterator1& x, const Iterator2& y) const
|
||||
{
|
||||
return boost::detail::any_distance<Difference>(x, y);//,(Difference*)());
|
||||
typedef typename Iterator1::difference_type difference_type;
|
||||
return boost::detail::any_distance<difference_type>(
|
||||
x.base(), y.base());
|
||||
}
|
||||
};
|
||||
|
||||
|
@ -1,55 +0,0 @@
|
||||
// (C) Copyright Jeremy Siek 2001. Permission to copy, use, modify,
|
||||
// sell and distribute this software is granted provided this
|
||||
// copyright notice appears in all copies. This software is provided
|
||||
// "as is" without express or implied warranty, and with no claim as
|
||||
// to its suitability for any purpose.
|
||||
|
||||
// Revision History:
|
||||
|
||||
// 27 Feb 2001 Jeremy Siek
|
||||
// Initial checkin.
|
||||
|
||||
#ifndef BOOST_FUNCTION_OUTPUT_ITERATOR_HPP
|
||||
#define BOOST_FUNCTION_OUTPUT_ITERATOR_HPP
|
||||
|
||||
#include <iterator>
|
||||
|
||||
namespace boost {
|
||||
|
||||
template <class UnaryFunction>
|
||||
class function_output_iterator {
|
||||
typedef function_output_iterator self;
|
||||
public:
|
||||
typedef std::output_iterator_tag iterator_category;
|
||||
typedef void value_type;
|
||||
typedef void difference_type;
|
||||
typedef void pointer;
|
||||
typedef void reference;
|
||||
|
||||
explicit function_output_iterator(const UnaryFunction& f = UnaryFunction())
|
||||
: m_f(f) {}
|
||||
|
||||
struct output_proxy {
|
||||
output_proxy(UnaryFunction& f) : m_f(f) { }
|
||||
template <class T> output_proxy& operator=(const T& value) {
|
||||
m_f(value);
|
||||
return *this;
|
||||
}
|
||||
UnaryFunction& m_f;
|
||||
};
|
||||
output_proxy operator*() { return output_proxy(m_f); }
|
||||
self& operator++() { return *this; }
|
||||
self& operator++(int) { return *this; }
|
||||
private:
|
||||
UnaryFunction m_f;
|
||||
};
|
||||
|
||||
template <class UnaryFunction>
|
||||
inline function_output_iterator<UnaryFunction>
|
||||
make_function_output_iterator(const UnaryFunction& f = UnaryFunction()) {
|
||||
return function_output_iterator<UnaryFunction>(f);
|
||||
}
|
||||
|
||||
} // namespace boost
|
||||
|
||||
#endif // BOOST_FUNCTION_OUTPUT_ITERATOR_HPP
|
@ -1,426 +0,0 @@
|
||||
// (C) Copyright Jeremy Siek and David Abrahams 2000-2001. Permission to copy,
|
||||
// use, modify, sell and distribute this software is granted provided this
|
||||
// copyright notice appears in all copies. This software is provided "as is"
|
||||
// without express or implied warranty, and with no claim as to its suitability
|
||||
// for any purpose.
|
||||
//
|
||||
// Revision History:
|
||||
// 11 Feb 2001 Use new iterator_adaptor interface, Fixes for Borland.
|
||||
// (Dave Abrahams)
|
||||
// 04 Feb 2001 Support for user-defined iterator categories (Dave Abrahams)
|
||||
// 30 Jan 2001 Initial Checkin (Dave Abrahams)
|
||||
|
||||
#ifndef BOOST_HALF_OPEN_RANGE_HPP_
|
||||
# define BOOST_HALF_OPEN_RANGE_HPP_
|
||||
|
||||
# include <boost/counting_iterator.hpp>
|
||||
# include <functional>
|
||||
# include <cassert>
|
||||
# include <boost/operators.hpp>
|
||||
# include <string>
|
||||
# include <stdexcept>
|
||||
# include <iterator>
|
||||
|
||||
namespace boost {
|
||||
|
||||
namespace detail {
|
||||
|
||||
// Template class choose_finish -- allows us to maintain the invariant that
|
||||
// start() <= finish() on half_open_range specializations that support random
|
||||
// access.
|
||||
#ifdef __MWERKS__
|
||||
template <class T>
|
||||
const T& choose_finish(const T&, const T& finish, std::input_iterator_tag)
|
||||
{
|
||||
return finish;
|
||||
}
|
||||
|
||||
template <class T>
|
||||
const T& choose_finish(const T&, const T& finish, std::output_iterator_tag)
|
||||
{
|
||||
return finish;
|
||||
}
|
||||
|
||||
template <class T>
|
||||
const T& choose_finish(const T& start, const T& finish, std::random_access_iterator_tag)
|
||||
{
|
||||
return finish < start ? start : finish;
|
||||
}
|
||||
#else
|
||||
template <bool is_random_access> struct finish_chooser;
|
||||
|
||||
template <>
|
||||
struct finish_chooser<false>
|
||||
{
|
||||
template <class T>
|
||||
struct rebind
|
||||
{
|
||||
static T choose(const T&, const T& finish)
|
||||
{ return finish; }
|
||||
};
|
||||
};
|
||||
|
||||
template <>
|
||||
struct finish_chooser<true>
|
||||
{
|
||||
template <class T>
|
||||
struct rebind
|
||||
{
|
||||
static T choose(const T& start, const T& finish)
|
||||
{ return finish < start ? start : finish; }
|
||||
};
|
||||
};
|
||||
|
||||
template <class Category, class Incrementable>
|
||||
struct choose_finish
|
||||
{
|
||||
static const Incrementable choose(const Incrementable& start, const Incrementable& finish)
|
||||
{
|
||||
return finish_chooser<(
|
||||
::boost::is_convertible<Category*,std::random_access_iterator_tag*>::value
|
||||
)>::template rebind<Incrementable>::choose(start, finish);
|
||||
}
|
||||
};
|
||||
#endif
|
||||
}
|
||||
|
||||
template <class Incrementable>
|
||||
struct half_open_range
|
||||
{
|
||||
typedef typename counting_iterator_generator<Incrementable>::type iterator;
|
||||
|
||||
private: // utility type definitions
|
||||
// Using iter_t prevents compiler confusion with boost::iterator
|
||||
typedef typename counting_iterator_generator<Incrementable>::type iter_t;
|
||||
|
||||
typedef std::less<Incrementable> less_value;
|
||||
typedef typename iter_t::iterator_category category;
|
||||
typedef half_open_range<Incrementable> self;
|
||||
|
||||
public:
|
||||
typedef iter_t const_iterator;
|
||||
typedef typename counting_iterator_traits<Incrementable>::value_type value_type;
|
||||
typedef typename counting_iterator_traits<Incrementable>::difference_type difference_type;
|
||||
typedef typename counting_iterator_traits<Incrementable>::reference reference;
|
||||
typedef typename counting_iterator_traits<Incrementable>::reference const_reference;
|
||||
typedef typename counting_iterator_traits<Incrementable>::pointer pointer;
|
||||
typedef typename counting_iterator_traits<Incrementable>::pointer const_pointer;
|
||||
|
||||
// It would be nice to select an unsigned type, but this is appropriate
|
||||
// since the library makes an attempt to select a difference_type which can
|
||||
// hold the difference between any two iterators.
|
||||
typedef typename counting_iterator_traits<Incrementable>::difference_type size_type;
|
||||
|
||||
half_open_range(Incrementable start, Incrementable finish)
|
||||
: m_start(start),
|
||||
m_finish(
|
||||
#ifndef __MWERKS__
|
||||
detail::choose_finish<category,Incrementable>::choose(start, finish)
|
||||
#else
|
||||
detail::choose_finish(start, finish, category())
|
||||
#endif
|
||||
)
|
||||
{}
|
||||
|
||||
// Implicit conversion from std::pair<Incrementable,Incrementable> allows us
|
||||
// to accept the results of std::equal_range(), for example.
|
||||
half_open_range(const std::pair<Incrementable,Incrementable>& x)
|
||||
: m_start(x.first),
|
||||
m_finish(
|
||||
#ifndef __MWERKS__
|
||||
detail::choose_finish<category,Incrementable>::choose(x.first, x.second)
|
||||
#else
|
||||
detail::choose_finish(x.first, x.second, category())
|
||||
#endif
|
||||
)
|
||||
{}
|
||||
|
||||
half_open_range& operator=(const self& x)
|
||||
{
|
||||
m_start = x.m_start;
|
||||
m_finish = x.m_finish;
|
||||
return *this;
|
||||
}
|
||||
|
||||
half_open_range& operator=(const std::pair<Incrementable,Incrementable>& x)
|
||||
{
|
||||
m_start = x.first;
|
||||
m_finish =
|
||||
#ifndef __MWERKS__
|
||||
detail::choose_finish<category,Incrementable>::choose(x.first, x.second);
|
||||
#else
|
||||
detail::choose_finish(x.first, x.second, category();
|
||||
#endif
|
||||
}
|
||||
|
||||
iterator begin() const { return iterator(m_start); }
|
||||
iterator end() const { return iterator(m_finish); }
|
||||
|
||||
Incrementable front() const { assert(!this->empty()); return m_start; }
|
||||
Incrementable back() const { assert(!this->empty()); return boost::prior(m_finish); }
|
||||
|
||||
Incrementable start() const { return m_start; }
|
||||
Incrementable finish() const { return m_finish; }
|
||||
|
||||
size_type size() const { return boost::detail::distance(begin(), end()); }
|
||||
|
||||
bool empty() const
|
||||
{
|
||||
return m_finish == m_start;
|
||||
}
|
||||
|
||||
void swap(half_open_range& x) {
|
||||
std::swap(m_start, x.m_start);
|
||||
std::swap(m_finish, x.m_finish);
|
||||
}
|
||||
|
||||
public: // functions requiring random access elements
|
||||
|
||||
// REQUIRES: x is reachable from this->front()
|
||||
bool contains(const value_type& x) const
|
||||
{
|
||||
BOOST_STATIC_ASSERT((boost::is_same<category, std::random_access_iterator_tag>::value));
|
||||
return !less_value()(x, m_start) && less_value()(x, m_finish);
|
||||
}
|
||||
|
||||
bool contains(const half_open_range& x) const
|
||||
{
|
||||
BOOST_STATIC_ASSERT((boost::is_same<category, std::random_access_iterator_tag>::value));
|
||||
return x.empty() || !less_value()(x.m_start, m_start) && !less_value()(m_finish, x.m_finish);
|
||||
}
|
||||
|
||||
bool intersects(const half_open_range& x) const
|
||||
{
|
||||
BOOST_STATIC_ASSERT((boost::is_same<category, std::random_access_iterator_tag>::value));
|
||||
return less_value()(
|
||||
less_value()(this->m_start, x.m_start) ? x.m_start : this->m_start,
|
||||
less_value()(this->m_finish, x.m_finish) ? this->m_finish : x.m_finish);
|
||||
}
|
||||
|
||||
half_open_range& operator&=(const half_open_range& x)
|
||||
{
|
||||
BOOST_STATIC_ASSERT((boost::is_same<category, std::random_access_iterator_tag>::value));
|
||||
|
||||
if (less_value()(this->m_start, x.m_start))
|
||||
this->m_start = x.m_start;
|
||||
|
||||
if (less_value()(x.m_finish, this->m_finish))
|
||||
this->m_finish = x.m_finish;
|
||||
|
||||
if (less_value()(this->m_finish, this->m_start))
|
||||
this->m_start = this->m_finish;
|
||||
|
||||
return *this;
|
||||
}
|
||||
|
||||
half_open_range& operator|=(const half_open_range& x)
|
||||
{
|
||||
BOOST_STATIC_ASSERT((boost::is_same<category, std::random_access_iterator_tag>::value));
|
||||
|
||||
if (!x.empty())
|
||||
{
|
||||
if (this->empty())
|
||||
{
|
||||
*this = x;
|
||||
}
|
||||
else
|
||||
{
|
||||
if (less_value()(x.m_start, this->m_start))
|
||||
this->m_start = x.m_start;
|
||||
|
||||
if (less_value()(this->m_finish, x.m_finish))
|
||||
this->m_finish = x.m_finish;
|
||||
}
|
||||
}
|
||||
return *this;
|
||||
}
|
||||
|
||||
// REQUIRES: x is reachable from this->front()
|
||||
const_iterator find(const value_type& x) const
|
||||
{
|
||||
BOOST_STATIC_ASSERT((boost::is_same<category, std::random_access_iterator_tag>::value));
|
||||
|
||||
return const_iterator(this->contains(x) ? x : m_finish);
|
||||
}
|
||||
|
||||
// REQUIRES: index >= 0 && index < size()
|
||||
value_type operator[](size_type index) const
|
||||
{
|
||||
assert(index >= 0 && index < size());
|
||||
return m_start + index;
|
||||
}
|
||||
|
||||
value_type at(size_type index) const
|
||||
{
|
||||
if (index < 0 || index >= size())
|
||||
throw std::out_of_range(std::string("half_open_range"));
|
||||
return m_start + index;
|
||||
}
|
||||
|
||||
private: // data members
|
||||
Incrementable m_start, m_finish;
|
||||
};
|
||||
|
||||
template <class Incrementable>
|
||||
half_open_range<Incrementable> operator|(
|
||||
half_open_range<Incrementable> x,
|
||||
const half_open_range<Incrementable>& y)
|
||||
{
|
||||
return x |= y;
|
||||
}
|
||||
|
||||
template <class Incrementable>
|
||||
half_open_range<Incrementable> operator&(
|
||||
half_open_range<Incrementable> x,
|
||||
const half_open_range<Incrementable>& y)
|
||||
{
|
||||
return x &= y;
|
||||
}
|
||||
|
||||
template <class Incrementable>
|
||||
inline bool operator==(
|
||||
const half_open_range<Incrementable>& x,
|
||||
const half_open_range<Incrementable>& y)
|
||||
{
|
||||
const bool y_empty = y.empty();
|
||||
return x.empty() ? y_empty : !y_empty && x.start() == y.start() && x.finish() == y.finish();
|
||||
}
|
||||
|
||||
template <class Incrementable>
|
||||
inline bool operator!=(
|
||||
const half_open_range<Incrementable>& x,
|
||||
const half_open_range<Incrementable>& y)
|
||||
{
|
||||
return !(x == y);
|
||||
}
|
||||
|
||||
template <class Incrementable>
|
||||
inline half_open_range<Incrementable>
|
||||
make_half_open_range(Incrementable first, Incrementable last)
|
||||
{
|
||||
return half_open_range<Incrementable>(first, last);
|
||||
}
|
||||
|
||||
template <class Incrementable>
|
||||
bool intersects(
|
||||
const half_open_range<Incrementable>& x,
|
||||
const half_open_range<Incrementable>& y)
|
||||
{
|
||||
return x.intersects(y);
|
||||
}
|
||||
|
||||
template <class Incrementable>
|
||||
bool contains(
|
||||
const half_open_range<Incrementable>& x,
|
||||
const half_open_range<Incrementable>& y)
|
||||
{
|
||||
return x.contains(y);
|
||||
}
|
||||
|
||||
} // namespace boost
|
||||
|
||||
#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
|
||||
|
||||
namespace std {
|
||||
template <class Incrementable> struct less<boost::half_open_range<Incrementable> >
|
||||
: binary_function<
|
||||
boost::half_open_range<Incrementable>,
|
||||
boost::half_open_range<Incrementable>,bool>
|
||||
{
|
||||
bool operator()(
|
||||
const boost::half_open_range<Incrementable>& x,
|
||||
const boost::half_open_range<Incrementable>& y) const
|
||||
{
|
||||
less<Incrementable> cmp;
|
||||
return !y.empty() && (
|
||||
cmp(x.start(), y.start())
|
||||
|| !cmp(y.start(), x.start())
|
||||
&& cmp(x.finish(), y.finish()));
|
||||
}
|
||||
};
|
||||
|
||||
template <class Incrementable> struct less_equal<boost::half_open_range<Incrementable> >
|
||||
: binary_function<
|
||||
boost::half_open_range<Incrementable>,
|
||||
boost::half_open_range<Incrementable>,bool>
|
||||
{
|
||||
bool operator()(
|
||||
const boost::half_open_range<Incrementable>& x,
|
||||
const boost::half_open_range<Incrementable>& y) const
|
||||
{
|
||||
typedef boost::half_open_range<Incrementable> range;
|
||||
less<range> cmp;
|
||||
return !cmp(y,x);
|
||||
}
|
||||
};
|
||||
template <class Incrementable> struct greater<boost::half_open_range<Incrementable> >
|
||||
: binary_function<
|
||||
boost::half_open_range<Incrementable>,
|
||||
boost::half_open_range<Incrementable>,bool>
|
||||
{
|
||||
bool operator()(
|
||||
const boost::half_open_range<Incrementable>& x,
|
||||
const boost::half_open_range<Incrementable>& y) const
|
||||
{
|
||||
typedef boost::half_open_range<Incrementable> range;
|
||||
less<range> cmp;
|
||||
return cmp(y,x);
|
||||
}
|
||||
};
|
||||
|
||||
template <class Incrementable> struct greater_equal<boost::half_open_range<Incrementable> >
|
||||
: binary_function<
|
||||
boost::half_open_range<Incrementable>,
|
||||
boost::half_open_range<Incrementable>,bool>
|
||||
{
|
||||
bool operator()(
|
||||
const boost::half_open_range<Incrementable>& x,
|
||||
const boost::half_open_range<Incrementable>& y) const
|
||||
{
|
||||
typedef boost::half_open_range<Incrementable> range;
|
||||
less<range> cmp;
|
||||
return !cmp(x,y);
|
||||
}
|
||||
};
|
||||
} // namespace std
|
||||
|
||||
#else
|
||||
|
||||
namespace boost {
|
||||
// Can't partially specialize std::less et al, so we must provide the operators
|
||||
template <class Incrementable>
|
||||
bool operator<(const half_open_range<Incrementable>& x,
|
||||
const half_open_range<Incrementable>& y)
|
||||
{
|
||||
return !y.empty() && (
|
||||
x.empty() || std::less<Incrementable>()(x.start(), y.start())
|
||||
|| !std::less<Incrementable>()(y.start(), x.start())
|
||||
&& std::less<Incrementable>()(x.finish(), y.finish()));
|
||||
}
|
||||
|
||||
template <class Incrementable>
|
||||
bool operator>(const half_open_range<Incrementable>& x,
|
||||
const half_open_range<Incrementable>& y)
|
||||
{
|
||||
return y < x;
|
||||
}
|
||||
|
||||
template <class Incrementable>
|
||||
bool operator<=(const half_open_range<Incrementable>& x,
|
||||
const half_open_range<Incrementable>& y)
|
||||
{
|
||||
return !(y < x);
|
||||
}
|
||||
|
||||
template <class Incrementable>
|
||||
bool operator>=(const half_open_range<Incrementable>& x,
|
||||
const half_open_range<Incrementable>& y)
|
||||
{
|
||||
return !(x < y);
|
||||
}
|
||||
} // namespace boost
|
||||
|
||||
#endif
|
||||
|
||||
|
||||
#endif // BOOST_HALF_OPEN_RANGE_HPP_
|
@ -1,60 +0,0 @@
|
||||
// interator.hpp workarounds for non-conforming standard libraries ---------//
|
||||
|
||||
// (C) Copyright Boost.org 2000. Permission to copy, use, modify, sell and
|
||||
// distribute this software is granted provided this copyright notice appears
|
||||
// in all copies. This software is provided "as is" without express or implied
|
||||
// warranty, and with no claim as to its suitability for any purpose.
|
||||
|
||||
// See http://www.boost.org for most recent version including documentation.
|
||||
|
||||
// Revision History
|
||||
// 12 Jan 01 added <cstddef> for std::ptrdiff_t (Jens Maurer)
|
||||
// 28 Jun 00 Workarounds to deal with known MSVC bugs (David Abrahams)
|
||||
// 26 Jun 00 Initial version (Jeremy Siek)
|
||||
|
||||
#ifndef BOOST_ITERATOR_HPP
|
||||
#define BOOST_ITERATOR_HPP
|
||||
|
||||
#include <iterator>
|
||||
#include <cstddef> // std::ptrdiff_t
|
||||
#include <boost/config.hpp>
|
||||
|
||||
namespace boost
|
||||
{
|
||||
# if defined(BOOST_NO_STD_ITERATOR) && !defined(BOOST_MSVC_STD_ITERATOR)
|
||||
template <class Category, class T,
|
||||
class Distance = std::ptrdiff_t,
|
||||
class Pointer = T*, class Reference = T&>
|
||||
struct iterator
|
||||
{
|
||||
typedef T value_type;
|
||||
typedef Distance difference_type;
|
||||
typedef Pointer pointer;
|
||||
typedef Reference reference;
|
||||
typedef Category iterator_category;
|
||||
};
|
||||
# else
|
||||
|
||||
// declare iterator_base in namespace detail to work around MSVC bugs which
|
||||
// prevent derivation from an identically-named class in a different namespace.
|
||||
namespace detail {
|
||||
template <class Category, class T, class Distance, class Pointer, class Reference>
|
||||
# if !defined(BOOST_MSVC_STD_ITERATOR)
|
||||
struct iterator_base : std::iterator<Category, T, Distance, Pointer, Reference> {};
|
||||
# else
|
||||
struct iterator_base : std::iterator<Category, T, Distance>
|
||||
{
|
||||
typedef Reference reference;
|
||||
typedef Pointer pointer;
|
||||
typedef Distance difference_type;
|
||||
};
|
||||
# endif
|
||||
}
|
||||
|
||||
template <class Category, class T, class Distance = std::ptrdiff_t,
|
||||
class Pointer = T*, class Reference = T&>
|
||||
struct iterator : detail::iterator_base<Category, T, Distance, Pointer, Reference> {};
|
||||
# endif
|
||||
} // namespace boost
|
||||
|
||||
#endif // BOOST_ITERATOR_HPP
|
@ -114,7 +114,7 @@
|
||||
# include <boost/type_traits.hpp>
|
||||
# include <boost/detail/iterator.hpp>
|
||||
# include <boost/detail/select_type.hpp>
|
||||
# include <boost/detail/named_template_params.hpp>
|
||||
# include <boost/pending/ct_if.hpp>
|
||||
|
||||
// I was having some problems with VC6. I couldn't tell whether our hack for
|
||||
// stock GCC was causing problems so I needed an easy way to turn it on and
|
||||
@ -146,7 +146,7 @@ struct TrivialIteratorPoliciesConcept
|
||||
const_constraints();
|
||||
}
|
||||
void const_constraints() const {
|
||||
Reference r = p.dereference(type<Reference>(), x);
|
||||
Reference r = p.dereference(x);
|
||||
b = p.equal(x, x);
|
||||
ignore_unused_variable_warning(r);
|
||||
}
|
||||
@ -208,8 +208,7 @@ struct RandomAccessIteratorPoliciesConcept
|
||||
ignore_unused_variable_warning(t);
|
||||
}
|
||||
void const_constraints() const {
|
||||
n = p.distance(type<DifferenceType>(), x, x);
|
||||
b = p.less(x, x);
|
||||
n = p.distance(x, x);
|
||||
}
|
||||
Policies p;
|
||||
Adapted x;
|
||||
@ -231,37 +230,30 @@ struct default_iterator_policies
|
||||
void initialize(Base&)
|
||||
{ }
|
||||
|
||||
// The "type<Reference>" parameter is a portable mechanism for
|
||||
// the iterator_adaptor class to tell this member function what
|
||||
// the Reference type is, which is needed for the return type.
|
||||
template <class Reference, class Base>
|
||||
Reference dereference(type<Reference>, const Base& x) const
|
||||
{ return *x; }
|
||||
template <class IteratorAdaptor>
|
||||
typename IteratorAdaptor::reference dereference(const IteratorAdaptor& x) const
|
||||
{ return *x.base(); }
|
||||
|
||||
template <class Base>
|
||||
void increment(Base& x)
|
||||
{ ++x; }
|
||||
template <class IteratorAdaptor>
|
||||
void increment(IteratorAdaptor& x)
|
||||
{ ++x.base(); }
|
||||
|
||||
template <class Base>
|
||||
void decrement(Base& x)
|
||||
{ --x; }
|
||||
template <class IteratorAdaptor>
|
||||
void decrement(IteratorAdaptor& x)
|
||||
{ --x.base(); }
|
||||
|
||||
template <class Base, class DifferenceType>
|
||||
void advance(Base& x, DifferenceType n)
|
||||
{ x += n; }
|
||||
template <class IteratorAdaptor, class DifferenceType>
|
||||
void advance(IteratorAdaptor& x, DifferenceType n)
|
||||
{ x.base() += n; }
|
||||
|
||||
template <class Difference, class Iterator1, class Iterator2>
|
||||
Difference distance(type<Difference>, const Iterator1& x,
|
||||
const Iterator2& y) const
|
||||
{ return y - x; }
|
||||
template <class IteratorAdaptor1, class IteratorAdaptor2>
|
||||
typename IteratorAdaptor1::difference_type
|
||||
distance(const IteratorAdaptor1& x, const IteratorAdaptor2& y) const
|
||||
{ return y.base() - x.base(); }
|
||||
|
||||
template <class Iterator1, class Iterator2>
|
||||
bool equal(const Iterator1& x, const Iterator2& y) const
|
||||
{ return x == y; }
|
||||
|
||||
template <class Iterator1, class Iterator2>
|
||||
bool less(const Iterator1& x, const Iterator2& y) const
|
||||
{ return x < y; }
|
||||
template <class IteratorAdaptor1, class IteratorAdaptor2>
|
||||
bool equal(const IteratorAdaptor1& x, const IteratorAdaptor2& y) const
|
||||
{ return x.base() == y.base(); }
|
||||
};
|
||||
|
||||
// putting the comparisons in a base class avoids the g++
|
||||
@ -277,7 +269,7 @@ inline bool operator==(const iterator_comparisons<D1,Base1>& xb,
|
||||
{
|
||||
const D1& x = static_cast<const D1&>(xb);
|
||||
const D2& y = static_cast<const D2&>(yb);
|
||||
return x.policies().equal(x.iter(), y.iter());
|
||||
return x.policies().equal(x, y);
|
||||
}
|
||||
|
||||
template <class D1, class D2, class Base1, class Base2>
|
||||
@ -286,7 +278,7 @@ inline bool operator!=(const iterator_comparisons<D1,Base1>& xb,
|
||||
{
|
||||
const D1& x = static_cast<const D1&>(xb);
|
||||
const D2& y = static_cast<const D2&>(yb);
|
||||
return !x.policies().equal(x.iter(), y.iter());
|
||||
return !x.policies().equal(x, y);
|
||||
}
|
||||
|
||||
template <class D1, class D2, class Base1, class Base2>
|
||||
@ -295,7 +287,7 @@ inline bool operator<(const iterator_comparisons<D1,Base1>& xb,
|
||||
{
|
||||
const D1& x = static_cast<const D1&>(xb);
|
||||
const D2& y = static_cast<const D2&>(yb);
|
||||
return x.policies().less(x.iter(), y.iter());
|
||||
return x.policies().distance(x, y) > 0;
|
||||
}
|
||||
|
||||
template <class D1, class D2, class Base1, class Base2>
|
||||
@ -304,7 +296,7 @@ inline bool operator>(const iterator_comparisons<D1,Base1>& xb,
|
||||
{
|
||||
const D1& x = static_cast<const D1&>(xb);
|
||||
const D2& y = static_cast<const D2&>(yb);
|
||||
return x.policies().less(y.iter(), x.iter());
|
||||
return x.policies().distance(y, x) > 0;
|
||||
}
|
||||
|
||||
template <class D1, class D2, class Base1, class Base2>
|
||||
@ -313,7 +305,7 @@ inline bool operator>=(const iterator_comparisons<D1,Base1>& xb,
|
||||
{
|
||||
const D1& x = static_cast<const D1&>(xb);
|
||||
const D2& y = static_cast<const D2&>(yb);
|
||||
return !x.policies().less(x.iter(), y.iter());
|
||||
return !(x.policies().distance(x, y) > 0);
|
||||
}
|
||||
|
||||
template <class D1, class D2, class Base1, class Base2>
|
||||
@ -322,7 +314,7 @@ inline bool operator<=(const iterator_comparisons<D1,Base1>& xb,
|
||||
{
|
||||
const D1& x = static_cast<const D1&>(xb);
|
||||
const D2& y = static_cast<const D2&>(yb);
|
||||
return !x.policies().less(y.iter(), x.iter());
|
||||
return !(x.policies().distance(y, x) > 0);
|
||||
}
|
||||
#endif
|
||||
|
||||
@ -417,7 +409,7 @@ namespace detail {
|
||||
{
|
||||
BOOST_STATIC_CONSTANT(bool, is_ptr = boost::is_pointer<Iterator>::value);
|
||||
|
||||
typedef iterator_defaults_select<is_ptr>::template traits<Iterator,Value> traits;
|
||||
typedef typename iterator_defaults_select<is_ptr>::template traits<Iterator,Value> traits;
|
||||
typedef typename traits::pointer pointer;
|
||||
typedef typename traits::reference reference;
|
||||
};
|
||||
@ -446,25 +438,45 @@ namespace detail {
|
||||
|
||||
//===========================================================================
|
||||
// Specify the defaults for iterator_adaptor's template parameters
|
||||
|
||||
|
||||
struct default_argument { };
|
||||
// This class template is a workaround for MSVC.
|
||||
struct dummy_default_gen {
|
||||
template <class Base, class Traits>
|
||||
struct select { typedef default_argument type; };
|
||||
};
|
||||
// This class template is a workaround for MSVC.
|
||||
template <class Gen> struct default_generator {
|
||||
typedef dummy_default_gen type;
|
||||
};
|
||||
|
||||
struct default_value_type {
|
||||
template <class Base, class Traits>
|
||||
struct select {
|
||||
typedef typename boost::detail::iterator_traits<Base>::value_type type;
|
||||
};
|
||||
};
|
||||
template <> struct default_generator<default_value_type>
|
||||
{ typedef default_value_type type; }; // VC++ workaround
|
||||
|
||||
struct default_difference_type {
|
||||
template <class Base, class Traits>
|
||||
struct select {
|
||||
typedef typename boost::detail::iterator_traits<Base>::difference_type type;
|
||||
};
|
||||
};
|
||||
template <> struct default_generator<default_difference_type>
|
||||
{ typedef default_difference_type type; }; // VC++ workaround
|
||||
|
||||
struct default_iterator_category {
|
||||
template <class Base, class Traits>
|
||||
struct select {
|
||||
typedef typename boost::detail::iterator_traits<Base>::iterator_category type;
|
||||
};
|
||||
};
|
||||
template <> struct default_generator<default_iterator_category>
|
||||
{ typedef default_iterator_category type; }; // VC++ workaround
|
||||
|
||||
struct default_pointer {
|
||||
template <class Base, class Traits>
|
||||
struct select {
|
||||
@ -473,6 +485,9 @@ namespace detail {
|
||||
type;
|
||||
};
|
||||
};
|
||||
template <> struct default_generator<default_pointer>
|
||||
{ typedef default_pointer type; }; // VC++ workaround
|
||||
|
||||
struct default_reference {
|
||||
template <class Base, class Traits>
|
||||
struct select {
|
||||
@ -481,72 +496,221 @@ namespace detail {
|
||||
type;
|
||||
};
|
||||
};
|
||||
template <> struct default_generator<default_reference>
|
||||
{ typedef default_reference type; }; // VC++ workaround
|
||||
|
||||
} // namespace detail
|
||||
|
||||
|
||||
//===========================================================================
|
||||
// Support for named template parameters
|
||||
|
||||
#if !defined(__BORLANDC__)
|
||||
// Borland C++ thinks the nested recursive inheritance here is illegal.
|
||||
struct named_template_param_base { };
|
||||
|
||||
template <class V = default_argument,
|
||||
class R = default_argument,
|
||||
class P = default_argument,
|
||||
class C = default_argument,
|
||||
class D = default_argument>
|
||||
struct iter_traits_gen : public named_template_param_base {
|
||||
template <class T>
|
||||
struct value_type : public iter_traits_gen<T,R,P,C,D> { };
|
||||
template <class T>
|
||||
struct reference : public iter_traits_gen<V,T,P,C,D> { };
|
||||
template <class T>
|
||||
struct pointer : public iter_traits_gen<V,R,T,C,D> { };
|
||||
template <class T>
|
||||
struct iterator_category : public iter_traits_gen<V,R,P,T,D>{};
|
||||
template <class T>
|
||||
struct difference_type : public iter_traits_gen<V,R,P,C,T> { };
|
||||
namespace detail {
|
||||
struct value_type_tag { };
|
||||
struct reference_tag { };
|
||||
struct pointer_tag { };
|
||||
struct difference_type_tag { };
|
||||
struct iterator_category_tag { };
|
||||
|
||||
typedef boost::iterator<C, V, D, P, R> traits;
|
||||
// avoid using std::pair because A or B might be a reference type, and g++
|
||||
// complains about forming references to references inside std::pair
|
||||
template <class A, class B>
|
||||
struct cons_type {
|
||||
typedef A first_type;
|
||||
typedef B second_type;
|
||||
};
|
||||
|
||||
} // namespace detail
|
||||
|
||||
template <class Value> struct value_type_is : public named_template_param_base
|
||||
{
|
||||
typedef detail::cons_type<detail::value_type_tag, Value> type;
|
||||
};
|
||||
template <class Reference> struct reference_is : public named_template_param_base
|
||||
{
|
||||
typedef detail::cons_type<detail::reference_tag, Reference> type;
|
||||
};
|
||||
template <class Pointer> struct pointer_is : public named_template_param_base
|
||||
{
|
||||
typedef detail::cons_type<detail::pointer_tag, Pointer> type;
|
||||
};
|
||||
template <class Difference> struct difference_type_is
|
||||
: public named_template_param_base
|
||||
{
|
||||
typedef detail::cons_type<detail::difference_type_tag, Difference> type;
|
||||
};
|
||||
template <class IteratorCategory> struct iterator_category_is
|
||||
: public named_template_param_base
|
||||
{
|
||||
typedef detail::cons_type<detail::iterator_category_tag, IteratorCategory> type;
|
||||
};
|
||||
|
||||
namespace detail {
|
||||
|
||||
struct end_of_list { };
|
||||
|
||||
// Given an associative list, find the value with the matching key.
|
||||
// An associative list is a list of key-value pairs. The list is
|
||||
// built out of cons_type's and is terminated by end_of_list.
|
||||
|
||||
#ifdef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
|
||||
template <class AssocList, class Key>
|
||||
struct find_param;
|
||||
|
||||
struct find_param_continue {
|
||||
template <class AssocList, class Key2> struct bind {
|
||||
typedef typename AssocList::first_type Head;
|
||||
typedef typename Head::first_type Key1;
|
||||
typedef typename Head::second_type Value;
|
||||
typedef typename ct_if<is_same<Key1, Key2>::value,
|
||||
Value,
|
||||
typename find_param<typename AssocList::second_type, Key2>::type
|
||||
>::type type;
|
||||
};
|
||||
};
|
||||
struct find_param_end {
|
||||
template <class AssocList, class Key>
|
||||
struct bind { typedef detail::default_argument type; };
|
||||
};
|
||||
template <class AssocList> struct find_param_helper1
|
||||
{ typedef find_param_continue type; };
|
||||
template <> struct find_param_helper1<end_of_list>
|
||||
{ typedef find_param_end type; };
|
||||
|
||||
template <class AssocList, class Key>
|
||||
struct find_param {
|
||||
typedef typename find_param_helper1<AssocList>::type select1;
|
||||
typedef typename select1::template bind<AssocList, Key>::type type;
|
||||
};
|
||||
#else
|
||||
template <class AssocList, class Key> struct find_param;
|
||||
|
||||
template <class Key>
|
||||
struct find_param<end_of_list, Key> { typedef default_argument type; };
|
||||
|
||||
// Found a matching Key, return the associated Value
|
||||
template <class Key, class Value, class Rest>
|
||||
struct find_param<detail::cons_type< detail::cons_type<Key, Value>, Rest>, Key> {
|
||||
typedef Value type;
|
||||
};
|
||||
|
||||
// Non-matching keys, continue the search
|
||||
template <class Key1, class Value, class Rest, class Key2>
|
||||
struct find_param<detail::cons_type< detail::cons_type<Key1, Value>, Rest>, Key2> {
|
||||
typedef typename find_param<Rest, Key2>::type type;
|
||||
};
|
||||
#endif
|
||||
|
||||
BOOST_NAMED_TEMPLATE_PARAM(value_type);
|
||||
BOOST_NAMED_TEMPLATE_PARAM(reference);
|
||||
BOOST_NAMED_TEMPLATE_PARAM(pointer);
|
||||
BOOST_NAMED_TEMPLATE_PARAM(iterator_category);
|
||||
BOOST_NAMED_TEMPLATE_PARAM(difference_type);
|
||||
struct make_named_arg {
|
||||
template <class Key, class Value>
|
||||
struct bind { typedef typename Value::type type; };
|
||||
};
|
||||
struct make_key_value {
|
||||
template <class Key, class Value>
|
||||
struct bind { typedef detail::cons_type<Key, Value> type; };
|
||||
};
|
||||
|
||||
template <class Key, class Value>
|
||||
class make_arg {
|
||||
enum { is_named = is_convertible<Value, named_template_param_base>::value };
|
||||
typedef typename ct_if<is_named, make_named_arg, make_key_value>::type Make;
|
||||
typedef typename Make::template bind<Key, Value>::type type;
|
||||
};
|
||||
|
||||
// Mechanism for resolving the default argument for a template parameter.
|
||||
|
||||
template <class T> struct is_default { typedef type_traits::no_type type; };
|
||||
template <> struct is_default<default_argument>
|
||||
{ typedef type_traits::yes_type type; };
|
||||
|
||||
struct choose_default {
|
||||
template <class Arg, class DefaultGen, class Base, class Traits>
|
||||
struct bind {
|
||||
#if 1
|
||||
typedef typename default_generator<DefaultGen>::type Gen;
|
||||
typedef typename Gen::template select<Base,Traits>::type type;
|
||||
#endif
|
||||
};
|
||||
};
|
||||
struct choose_arg {
|
||||
template <class Arg, class DefaultGen, class Base, class Traits>
|
||||
struct bind {
|
||||
typedef Arg type;
|
||||
};
|
||||
};
|
||||
|
||||
template <class UseDefault>
|
||||
struct choose_arg_or_default { typedef choose_arg type; };
|
||||
template <> struct choose_arg_or_default<type_traits::yes_type> {
|
||||
typedef choose_default type;
|
||||
};
|
||||
|
||||
template <class Arg, class DefaultGen, class Base, class Traits>
|
||||
class resolve_default {
|
||||
typedef typename choose_arg_or_default<typename is_default<Arg>::type>::type
|
||||
Selector;
|
||||
public:
|
||||
typedef typename Selector
|
||||
::template bind<Arg, DefaultGen, Base, Traits>::type type;
|
||||
};
|
||||
|
||||
template <class Base, class Value, class Reference, class Pointer,
|
||||
class Category, class Distance>
|
||||
class iterator_adaptor_traits_gen
|
||||
{
|
||||
// Form an associative list out of the template parameters
|
||||
// If the argument is a normal parameter (not named) then make_arg
|
||||
// creates a key-value pair. If the argument is a named parameter,
|
||||
// then make_arg extracts the key-value pair defined inside the
|
||||
// named parameter.
|
||||
typedef detail::cons_type< typename make_arg<value_type_tag, Value>::type,
|
||||
detail::cons_type<typename make_arg<reference_tag, Reference>::type,
|
||||
detail::cons_type<typename make_arg<pointer_tag, Pointer>::type,
|
||||
detail::cons_type<typename make_arg<iterator_category_tag, Category>::type,
|
||||
detail::cons_type<typename make_arg<difference_type_tag, Distance>::type,
|
||||
end_of_list> > > > > ArgList;
|
||||
|
||||
// Search the list for particular parameters
|
||||
typedef typename find_param<ArgList, value_type_tag>::type Val;
|
||||
typedef typename find_param<ArgList, difference_type_tag>::type Diff;
|
||||
typedef typename find_param<ArgList, iterator_category_tag>::type Cat;
|
||||
typedef typename find_param<ArgList, pointer_tag>::type Ptr;
|
||||
typedef typename find_param<ArgList, reference_tag>::type Ref;
|
||||
|
||||
typedef boost::iterator<Category, Value, Distance, Pointer, Reference>
|
||||
Traits0;
|
||||
|
||||
typedef typename get_value_type<Base,
|
||||
typename boost::remove_const<Value>::type, Traits0
|
||||
>::type value_type;
|
||||
typedef typename get_difference_type<Base, Distance, Traits0>::type
|
||||
difference_type;
|
||||
typedef typename get_iterator_category<Base, Category, Traits0>::type
|
||||
iterator_category;
|
||||
// Compute the defaults if necessary
|
||||
typedef typename resolve_default<Val, default_value_type, Base, Traits0>::type
|
||||
value_type;
|
||||
// if getting default value type from iterator_traits, then it won't be const
|
||||
typedef typename resolve_default<Diff, default_difference_type, Base,
|
||||
Traits0>::type difference_type;
|
||||
typedef typename resolve_default<Cat, default_iterator_category, Base,
|
||||
Traits0>::type iterator_category;
|
||||
|
||||
typedef boost::iterator<iterator_category, value_type, difference_type,
|
||||
Pointer, Reference> Traits1;
|
||||
|
||||
// Compute the defaults for pointer and reference. This is done as a
|
||||
// separate step because the defaults for pointer and reference depend
|
||||
// on value_type.
|
||||
typedef typename resolve_default<Ptr, default_pointer, Base, Traits1>::type
|
||||
pointer;
|
||||
typedef typename resolve_default<Ref, default_reference, Base, Traits1>::type
|
||||
reference;
|
||||
|
||||
typedef typename get_pointer<Base, Pointer, Traits1>::type pointer;
|
||||
typedef typename get_reference<Base, Reference, Traits1>::type reference;
|
||||
public:
|
||||
typedef boost::iterator<iterator_category, value_type, difference_type,
|
||||
pointer, reference> type;
|
||||
typedef boost::iterator<iterator_category,
|
||||
typename remove_const<value_type>::type,
|
||||
difference_type, pointer, reference> type;
|
||||
};
|
||||
|
||||
|
||||
} // namespace detail
|
||||
|
||||
|
||||
#if !defined(__BORLANDC__)
|
||||
struct iterator_traits_generator
|
||||
: public detail::iter_traits_gen<> { };
|
||||
#endif
|
||||
|
||||
// This macro definition is only temporary in this file
|
||||
# if !defined(BOOST_MSVC)
|
||||
@ -587,10 +751,10 @@ template <class T> struct undefined;
|
||||
// supplied, iterator_traits<Base>::difference_type is used.
|
||||
template <class Base, class Policies,
|
||||
class Value = detail::default_argument,
|
||||
class Reference = BOOST_ARG_DEPENDENT_TYPENAME detail::choose_default_argument<Value>::type,
|
||||
class Pointer = BOOST_ARG_DEPENDENT_TYPENAME detail::choose_default_argument<Reference>::type,
|
||||
class Category = BOOST_ARG_DEPENDENT_TYPENAME detail::choose_default_argument<Pointer>::type,
|
||||
class Distance = BOOST_ARG_DEPENDENT_TYPENAME detail::choose_default_argument<Category>::type
|
||||
class Reference = detail::default_argument,
|
||||
class Pointer = detail::default_argument,
|
||||
class Category = detail::default_argument,
|
||||
class Distance = detail::default_argument
|
||||
>
|
||||
struct iterator_adaptor :
|
||||
#ifdef BOOST_RELOPS_AMBIGUITY_BUG
|
||||
@ -641,15 +805,15 @@ struct iterator_adaptor :
|
||||
explicit
|
||||
iterator_adaptor(const Base& it, const Policies& p = Policies())
|
||||
: m_iter_p(it, p) {
|
||||
policies().initialize(iter());
|
||||
policies().initialize(base());
|
||||
}
|
||||
|
||||
template <class Iter2, class Value2, class Pointer2, class Reference2>
|
||||
iterator_adaptor (
|
||||
const iterator_adaptor<Iter2,Policies,Value2,Reference2,Pointer2,Category,Distance>& src)
|
||||
: m_iter_p(src.iter(), src.policies())
|
||||
: m_iter_p(src.base(), src.policies())
|
||||
{
|
||||
policies().initialize(iter());
|
||||
policies().initialize(base());
|
||||
}
|
||||
|
||||
#if defined(BOOST_MSVC) || defined(__BORLANDC__)
|
||||
@ -661,7 +825,7 @@ struct iterator_adaptor :
|
||||
}
|
||||
#endif
|
||||
reference operator*() const {
|
||||
return policies().dereference(type<reference>(), iter());
|
||||
return policies().dereference(*this);
|
||||
}
|
||||
|
||||
#ifdef BOOST_MSVC
|
||||
@ -684,9 +848,9 @@ struct iterator_adaptor :
|
||||
#ifdef __MWERKS__
|
||||
// Odd bug, MWERKS couldn't deduce the type for the member template
|
||||
// Workaround by explicitly specifying the type.
|
||||
policies().increment<Base>(iter());
|
||||
policies().increment<self>(*this);
|
||||
#else
|
||||
policies().increment(iter());
|
||||
policies().increment(*this);
|
||||
#endif
|
||||
return *this;
|
||||
}
|
||||
@ -695,9 +859,9 @@ struct iterator_adaptor :
|
||||
|
||||
self& operator--() {
|
||||
#ifdef __MWERKS__
|
||||
policies().decrement<Base>(iter());
|
||||
policies().decrement<self>(*this);
|
||||
#else
|
||||
policies().decrement(iter());
|
||||
policies().decrement(*this);
|
||||
#endif
|
||||
return *this;
|
||||
}
|
||||
@ -705,16 +869,16 @@ struct iterator_adaptor :
|
||||
self operator--(int) { self tmp(*this); --*this; return tmp; }
|
||||
|
||||
self& operator+=(difference_type n) {
|
||||
policies().advance(iter(), n);
|
||||
policies().advance(*this, n);
|
||||
return *this;
|
||||
}
|
||||
|
||||
self& operator-=(difference_type n) {
|
||||
policies().advance(iter(), -n);
|
||||
policies().advance(*this, -n);
|
||||
return *this;
|
||||
}
|
||||
|
||||
base_type base() const { return m_iter_p.first(); }
|
||||
base_type const& base() const { return m_iter_p.first(); }
|
||||
|
||||
// Moved from global scope to avoid ambiguity with the operator-() which
|
||||
// subtracts iterators from one another.
|
||||
@ -724,11 +888,9 @@ private:
|
||||
compressed_pair<Base,Policies> m_iter_p;
|
||||
|
||||
public: // implementation details (too many compilers have trouble when these are private).
|
||||
base_type& base() { return m_iter_p.first(); }
|
||||
Policies& policies() { return m_iter_p.second(); }
|
||||
const Policies& policies() const { return m_iter_p.second(); }
|
||||
|
||||
Base& iter() { return m_iter_p.first(); }
|
||||
const Base& iter() const { return m_iter_p.first(); }
|
||||
};
|
||||
|
||||
template <class Base, class Policies, class Value, class Reference, class Pointer,
|
||||
@ -761,7 +923,7 @@ operator-(
|
||||
{
|
||||
typedef typename iterator_adaptor<Iterator1,Policies,Value1,Reference1,
|
||||
Pointer1,Category,Distance>::difference_type difference_type;
|
||||
return x.policies().distance(type<difference_type>(), y.iter(), x.iter());
|
||||
return x.policies().distance(y, x);
|
||||
}
|
||||
|
||||
#ifndef BOOST_RELOPS_AMBIGUITY_BUG
|
||||
@ -773,7 +935,7 @@ operator==(
|
||||
const iterator_adaptor<Iterator1,Policies,Value1,Reference1,Pointer1,Category,Distance>& x,
|
||||
const iterator_adaptor<Iterator2,Policies,Value2,Reference2,Pointer2,Category,Distance>& y)
|
||||
{
|
||||
return x.policies().equal(x.iter(), y.iter());
|
||||
return x.policies().equal(x, y);
|
||||
}
|
||||
|
||||
template <class Iterator1, class Iterator2, class Policies, class Value1, class Value2,
|
||||
@ -784,7 +946,7 @@ operator<(
|
||||
const iterator_adaptor<Iterator1,Policies,Value1,Reference1,Pointer1,Category,Distance>& x,
|
||||
const iterator_adaptor<Iterator2,Policies,Value2,Reference2,Pointer2,Category,Distance>& y)
|
||||
{
|
||||
return x.policies().less(x.iter(), y.iter());
|
||||
return x.policies().distance(x, y) > 0;
|
||||
}
|
||||
|
||||
template <class Iterator1, class Iterator2, class Policies, class Value1, class Value2,
|
||||
@ -795,7 +957,7 @@ operator>(
|
||||
const iterator_adaptor<Iterator1,Policies,Value1,Reference1,Pointer1,Category,Distance>& x,
|
||||
const iterator_adaptor<Iterator2,Policies,Value2,Reference2,Pointer2,Category,Distance>& y)
|
||||
{
|
||||
return x.policies().less(y.iter(), x.iter());
|
||||
return x.policies().distance(y, x) > 0;
|
||||
}
|
||||
|
||||
template <class Iterator1, class Iterator2, class Policies, class Value1, class Value2,
|
||||
@ -806,7 +968,7 @@ operator>=(
|
||||
const iterator_adaptor<Iterator1,Policies,Value1,Reference1,Pointer1,Category,Distance>& x,
|
||||
const iterator_adaptor<Iterator2,Policies,Value2,Reference2,Pointer2,Category,Distance>& y)
|
||||
{
|
||||
return !x.policies().less(x.iter(), y.iter());
|
||||
return !(x.policies().distance(x, y) > 0);
|
||||
}
|
||||
|
||||
template <class Iterator1, class Iterator2, class Policies, class Value1, class Value2,
|
||||
@ -817,7 +979,7 @@ operator<=(
|
||||
const iterator_adaptor<Iterator1,Policies,Value1,Reference1,Pointer1,Category,Distance>& x,
|
||||
const iterator_adaptor<Iterator2,Policies,Value2,Reference2,Pointer2,Category,Distance>& y)
|
||||
{
|
||||
return !x.policies().less(y.iter(), x.iter());
|
||||
return !(x.policies().distance(y, x) > 0);
|
||||
}
|
||||
|
||||
template <class Iterator1, class Iterator2, class Policies, class Value1, class Value2,
|
||||
@ -828,7 +990,7 @@ operator!=(
|
||||
const iterator_adaptor<Iterator1,Policies,Value1,Reference1,Pointer1,Category,Distance>& x,
|
||||
const iterator_adaptor<Iterator2,Policies,Value2,Reference2,Pointer2,Category,Distance>& y)
|
||||
{
|
||||
return !x.policies().equal(x.iter(), y.iter());
|
||||
return !x.policies().equal(x, y);
|
||||
}
|
||||
#endif
|
||||
|
||||
@ -844,9 +1006,10 @@ struct transform_iterator_policies : public default_iterator_policies
|
||||
transform_iterator_policies() { }
|
||||
transform_iterator_policies(const AdaptableUnaryFunction& f) : m_f(f) { }
|
||||
|
||||
template <class Reference, class Iterator>
|
||||
Reference dereference(type<Reference>, const Iterator& iter) const
|
||||
{ return m_f(*iter); }
|
||||
template <class IteratorAdaptor>
|
||||
typename IteratorAdaptor::reference
|
||||
dereference(const IteratorAdaptor& iter) const
|
||||
{ return m_f(*iter.base()); }
|
||||
|
||||
AdaptableUnaryFunction m_f;
|
||||
};
|
||||
@ -889,9 +1052,9 @@ make_transform_iterator(
|
||||
|
||||
struct indirect_iterator_policies : public default_iterator_policies
|
||||
{
|
||||
template <class Reference, class Iterator>
|
||||
Reference dereference(type<Reference>, const Iterator& x) const
|
||||
{ return **x; }
|
||||
template <class IteratorAdaptor>
|
||||
typename IteratorAdaptor::reference dereference(const IteratorAdaptor& x) const
|
||||
{ return **x.base(); }
|
||||
};
|
||||
|
||||
namespace detail {
|
||||
@ -984,34 +1147,30 @@ make_indirect_iterator(OuterIterator base)
|
||||
|
||||
struct reverse_iterator_policies : public default_iterator_policies
|
||||
{
|
||||
template <class Reference, class BidirectionalIterator>
|
||||
Reference dereference(type<Reference>, const BidirectionalIterator& x) const
|
||||
{ return *boost::prior(x); }
|
||||
template <class IteratorAdaptor>
|
||||
typename IteratorAdaptor::reference dereference(const IteratorAdaptor& x) const
|
||||
{ return *boost::prior(x.base()); }
|
||||
|
||||
template <class BidirectionalIterator>
|
||||
void increment(BidirectionalIterator& x) const
|
||||
{ --x; }
|
||||
{ --x.base(); }
|
||||
|
||||
template <class BidirectionalIterator>
|
||||
void decrement(BidirectionalIterator& x) const
|
||||
{ ++x; }
|
||||
{ ++x.base(); }
|
||||
|
||||
template <class BidirectionalIterator, class DifferenceType>
|
||||
void advance(BidirectionalIterator& x, DifferenceType n) const
|
||||
{ x -= n; }
|
||||
{ x.base() -= n; }
|
||||
|
||||
template <class Difference, class Iterator1, class Iterator2>
|
||||
Difference distance(type<Difference>, const Iterator1& x,
|
||||
const Iterator2& y) const
|
||||
{ return x - y; }
|
||||
template <class Iterator1, class Iterator2>
|
||||
typename Iterator1::difference_type distance(
|
||||
const Iterator1& x, const Iterator2& y) const
|
||||
{ return x.base() - y.base(); }
|
||||
|
||||
template <class Iterator1, class Iterator2>
|
||||
bool equal(const Iterator1& x, const Iterator2& y) const
|
||||
{ return x == y; }
|
||||
|
||||
template <class Iterator1, class Iterator2>
|
||||
bool less(const Iterator1& x, const Iterator2& y) const
|
||||
{ return y < x; }
|
||||
{ return x.base() == y.base(); }
|
||||
};
|
||||
|
||||
template <class BidirectionalIterator,
|
||||
@ -1044,9 +1203,9 @@ struct projection_iterator_policies : public default_iterator_policies
|
||||
projection_iterator_policies() { }
|
||||
projection_iterator_policies(const AdaptableUnaryFunction& f) : m_f(f) { }
|
||||
|
||||
template <class Reference, class Iterator>
|
||||
Reference dereference (type<Reference>, Iterator const& iter) const {
|
||||
return m_f(*iter);
|
||||
template <class IteratorAdaptor>
|
||||
typename IteratorAdaptor::reference dereference(IteratorAdaptor const& iter) const {
|
||||
return m_f(*iter.base());
|
||||
}
|
||||
|
||||
AdaptableUnaryFunction m_f;
|
||||
@ -1113,28 +1272,29 @@ public:
|
||||
|
||||
// The Iter template argument is neccessary for compatibility with a MWCW
|
||||
// bug workaround
|
||||
template <class Iter>
|
||||
void increment(Iter& x) {
|
||||
++x;
|
||||
satisfy_predicate(x);
|
||||
template <class IteratorAdaptor>
|
||||
void increment(IteratorAdaptor& x) {
|
||||
++x.base();
|
||||
satisfy_predicate(x.base());
|
||||
}
|
||||
|
||||
template <class Reference, class Iter>
|
||||
Reference dereference(type<Reference>, const Iter& x) const
|
||||
{ return *x; }
|
||||
template <class IteratorAdaptor>
|
||||
typename IteratorAdaptor::reference dereference(const IteratorAdaptor& x) const
|
||||
{ return *x.base(); }
|
||||
|
||||
template <class Iterator1, class Iterator2>
|
||||
bool equal(const Iterator1& x, const Iterator2& y) const
|
||||
{ return x == y; }
|
||||
template <class IteratorAdaptor1, class IteratorAdaptor2>
|
||||
bool equal(const IteratorAdaptor1& x, const IteratorAdaptor2& y) const
|
||||
{ return x.base() == y.base(); }
|
||||
|
||||
private:
|
||||
void satisfy_predicate(Iterator& iter);
|
||||
Predicate m_predicate;
|
||||
Iterator m_end;
|
||||
};
|
||||
|
||||
template <class Predicate, class Iterator>
|
||||
void filter_iterator_policies<Predicate,Iterator>
|
||||
::satisfy_predicate(Iterator& iter)
|
||||
void filter_iterator_policies<Predicate,Iterator>::satisfy_predicate(
|
||||
Iterator& iter)
|
||||
{
|
||||
while (m_end != iter && !m_predicate(*iter))
|
||||
++iter;
|
||||
|
@ -1,75 +0,0 @@
|
||||
// (C) Copyright Jeremy Siek 1999. Permission to copy, use, modify,
|
||||
// sell and distribute this software is granted provided this
|
||||
// copyright notice appears in all copies. This software is provided
|
||||
// "as is" without express or implied warranty, and with no claim as
|
||||
// to its suitability for any purpose.
|
||||
|
||||
#ifndef BOOST_INT_ITERATOR_H
|
||||
#define BOOST_INT_ITERATOR_H
|
||||
|
||||
#include <boost/iterator.hpp>
|
||||
#if !defined BOOST_MSVC
|
||||
#include <boost/operators.hpp>
|
||||
#endif
|
||||
#include <iostream>
|
||||
//using namespace std;
|
||||
|
||||
#ifndef BOOST_NO_OPERATORS_IN_NAMESPACE
|
||||
namespace boost {
|
||||
#endif
|
||||
|
||||
// this should use random_access_iterator_helper but I've had
|
||||
// VC++ portablility problems with that. -JGS
|
||||
template <class IntT>
|
||||
class int_iterator
|
||||
{
|
||||
typedef int_iterator self;
|
||||
public:
|
||||
typedef std::random_access_iterator_tag iterator_category;
|
||||
typedef IntT value_type;
|
||||
typedef IntT& reference;
|
||||
typedef IntT* pointer;
|
||||
typedef std::ptrdiff_t difference_type;
|
||||
|
||||
inline int_iterator() : _i(0) { }
|
||||
inline int_iterator(IntT i) : _i(i) { }
|
||||
inline int_iterator(const self& x) : _i(x._i) { }
|
||||
inline self& operator=(const self& x) { _i = x._i; return *this; }
|
||||
inline IntT operator*() { return _i; }
|
||||
inline IntT operator[](IntT n) { return _i + n; }
|
||||
inline self& operator++() { ++_i; return *this; }
|
||||
inline self operator++(int) { self t = *this; ++_i; return t; }
|
||||
inline self& operator+=(IntT n) { _i += n; return *this; }
|
||||
inline self operator+(IntT n) { self t = *this; t += n; return t; }
|
||||
inline self& operator--() { --_i; return *this; }
|
||||
inline self operator--(int) { self t = *this; --_i; return t; }
|
||||
inline self& operator-=(IntT n) { _i -= n; return *this; }
|
||||
inline IntT operator-(const self& x) const { return _i - x._i; }
|
||||
inline bool operator==(const self& x) const { return _i == x._i; }
|
||||
// vc++ had a problem finding != in random_access_iterator_helper
|
||||
// need to look into this... for now implementing everything here -JGS
|
||||
inline bool operator!=(const self& x) const { return _i != x._i; }
|
||||
inline bool operator<(const self& x) const { return _i < x._i; }
|
||||
inline bool operator<=(const self& x) const { return _i <= x._i; }
|
||||
inline bool operator>(const self& x) const { return _i > x._i; }
|
||||
inline bool operator>=(const self& x) const { return _i >= x._i; }
|
||||
protected:
|
||||
IntT _i;
|
||||
};
|
||||
|
||||
template <class IntT>
|
||||
inline int_iterator<IntT>
|
||||
operator+(IntT n, int_iterator<IntT> t) { t += n; return t; }
|
||||
|
||||
#ifndef BOOST_NO_OPERATORS_IN_NAMESPACE
|
||||
} /* namespace boost */
|
||||
#endif
|
||||
|
||||
#ifdef BOOST_NO_OPERATORS_IN_NAMESPACE
|
||||
namespace boost {
|
||||
using ::int_iterator;
|
||||
}
|
||||
#endif
|
||||
|
||||
|
||||
#endif /* BOOST_INT_ITERATOR_H */
|
@ -1,59 +0,0 @@
|
||||
// (C) Copyright David Abrahams and Jeremy Siek 2000-2001. Permission to copy,
|
||||
// use, modify, sell and distribute this software is granted provided this
|
||||
// copyright notice appears in all copies. This software is provided "as is"
|
||||
// without express or implied warranty, and with no claim as to its suitability
|
||||
// for any purpose.
|
||||
//
|
||||
// Revision History:
|
||||
// 04 Jan 2001 Factored counting_iterator stuff into
|
||||
// boost/counting_iterator.hpp (David Abrahams)
|
||||
|
||||
#ifndef BOOST_INTEGER_RANGE_HPP_
|
||||
#define BOOST_INTEGER_RANGE_HPP_
|
||||
|
||||
#include <boost/config.hpp>
|
||||
#include <boost/counting_iterator.hpp>
|
||||
|
||||
namespace boost {
|
||||
|
||||
//=============================================================================
|
||||
// Counting Iterator and Integer Range Class
|
||||
|
||||
template <class IntegerType>
|
||||
struct integer_range {
|
||||
typedef typename counting_iterator_generator<IntegerType>::type iterator;
|
||||
|
||||
typedef iterator const_iterator;
|
||||
typedef IntegerType value_type;
|
||||
typedef std::ptrdiff_t difference_type;
|
||||
typedef IntegerType reference;
|
||||
typedef IntegerType const_reference;
|
||||
typedef const IntegerType* pointer;
|
||||
typedef const IntegerType* const_pointer;
|
||||
typedef IntegerType size_type;
|
||||
|
||||
integer_range(IntegerType start, IntegerType finish)
|
||||
: m_start(start), m_finish(finish) { }
|
||||
|
||||
iterator begin() const { return iterator(m_start); }
|
||||
iterator end() const { return iterator(m_finish); }
|
||||
size_type size() const { return m_finish - m_start; }
|
||||
bool empty() const { return m_finish == m_start; }
|
||||
void swap(integer_range& x) {
|
||||
std::swap(m_start, x.m_start);
|
||||
std::swap(m_finish, x.m_finish);
|
||||
}
|
||||
protected:
|
||||
IntegerType m_start, m_finish;
|
||||
};
|
||||
|
||||
template <class IntegerType>
|
||||
inline integer_range<IntegerType>
|
||||
make_integer_range(IntegerType first, IntegerType last)
|
||||
{
|
||||
return integer_range<IntegerType>(first, last);
|
||||
}
|
||||
|
||||
} // namespace boost
|
||||
|
||||
#endif // BOOST_INTEGER_RANGE_HPP_
|
@ -1 +0,0 @@
|
||||
#include <boost/iterator_adaptors.hpp>
|
@ -1,214 +0,0 @@
|
||||
#ifndef BOOST_ITERATOR_TESTS_HPP
|
||||
# define BOOST_ITERATOR_TESTS_HPP
|
||||
|
||||
// This is meant to be the beginnings of a comprehensive, generic
|
||||
// test suite for STL concepts such as iterators and containers.
|
||||
//
|
||||
// Revision History:
|
||||
// 08 Feb 2001 Fixed bidirectional iterator test so that
|
||||
// --i is no longer a precondition.
|
||||
// (Jeremy Siek)
|
||||
// 04 Feb 2001 Added lvalue test, corrected preconditions
|
||||
// (David Abrahams)
|
||||
|
||||
# include <iterator>
|
||||
# include <assert.h>
|
||||
# include <boost/type_traits.hpp>
|
||||
# include <boost/static_assert.hpp>
|
||||
# include <boost/concept_archetype.hpp> // for detail::dummy_constructor
|
||||
|
||||
namespace boost {
|
||||
|
||||
// use this for the value type
|
||||
struct dummyT {
|
||||
dummyT() { }
|
||||
dummyT(detail::dummy_constructor) { }
|
||||
dummyT(int x) : m_x(x) { }
|
||||
int foo() const { return m_x; }
|
||||
bool operator==(const dummyT& d) const { return m_x == d.m_x; }
|
||||
int m_x;
|
||||
};
|
||||
|
||||
|
||||
// Tests whether type Iterator satisfies the requirements for a
|
||||
// TrivialIterator.
|
||||
// Preconditions: i != j, *i == val
|
||||
template <class Iterator, class T>
|
||||
void trivial_iterator_test(const Iterator i, const Iterator j, T val)
|
||||
{
|
||||
Iterator k;
|
||||
assert(i == i);
|
||||
assert(j == j);
|
||||
assert(i != j);
|
||||
#ifdef BOOST_NO_STD_ITERATOR_TRAITS
|
||||
T v = *i;
|
||||
#else
|
||||
typename std::iterator_traits<Iterator>::value_type v = *i;
|
||||
#endif
|
||||
assert(v == val);
|
||||
#if 0
|
||||
// hmm, this will give a warning for transform_iterator... perhaps
|
||||
// this should be separated out into a stand-alone test since there
|
||||
// are several situations where it can't be used, like for
|
||||
// integer_range::iterator.
|
||||
assert(v == i->foo());
|
||||
#endif
|
||||
k = i;
|
||||
assert(k == k);
|
||||
assert(k == i);
|
||||
assert(k != j);
|
||||
assert(*k == val);
|
||||
}
|
||||
|
||||
|
||||
// Preconditions: i != j
|
||||
template <class Iterator, class T>
|
||||
void mutable_trivial_iterator_test(const Iterator i, const Iterator j, T val)
|
||||
{
|
||||
*i = val;
|
||||
trivial_iterator_test(i, j, val);
|
||||
}
|
||||
|
||||
|
||||
// Preconditions: *i == v1, *++i == v2
|
||||
template <class Iterator, class T>
|
||||
void input_iterator_test(Iterator i, T v1, T v2)
|
||||
{
|
||||
Iterator i1 = i, i2 = i;
|
||||
|
||||
assert(i == i1++);
|
||||
assert(i != ++i2);
|
||||
|
||||
trivial_iterator_test(i, i1, v1);
|
||||
trivial_iterator_test(i, i2, v1);
|
||||
|
||||
++i;
|
||||
assert(i == i1);
|
||||
assert(i == i2);
|
||||
++i1;
|
||||
++i2;
|
||||
|
||||
trivial_iterator_test(i, i1, v2);
|
||||
trivial_iterator_test(i, i2, v2);
|
||||
}
|
||||
|
||||
// how to test output iterator?
|
||||
|
||||
|
||||
template <bool is_pointer> struct lvalue_test
|
||||
{
|
||||
template <class Iterator> static void check(Iterator)
|
||||
{
|
||||
# ifndef BOOST_NO_STD_ITERATOR_TRAITS
|
||||
typedef typename std::iterator_traits<Iterator>::reference reference;
|
||||
typedef typename std::iterator_traits<Iterator>::value_type value_type;
|
||||
# else
|
||||
typedef typename Iterator::reference reference;
|
||||
typedef typename Iterator::value_type value_type;
|
||||
# endif
|
||||
BOOST_STATIC_ASSERT(boost::is_reference<reference>::value);
|
||||
BOOST_STATIC_ASSERT((boost::is_same<reference,value_type&>::value
|
||||
|| boost::is_same<reference,const value_type&>::value
|
||||
));
|
||||
}
|
||||
};
|
||||
|
||||
# ifdef BOOST_NO_STD_ITERATOR_TRAITS
|
||||
template <> struct lvalue_test<true> {
|
||||
template <class T> static void check(T) {}
|
||||
};
|
||||
#endif
|
||||
|
||||
template <class Iterator, class T>
|
||||
void forward_iterator_test(Iterator i, T v1, T v2)
|
||||
{
|
||||
input_iterator_test(i, v1, v2);
|
||||
|
||||
// borland doesn't allow non-type template parameters
|
||||
# if !defined(__BORLANDC__) || (__BORLANDC__ > 0x551)
|
||||
lvalue_test<(boost::is_pointer<Iterator>::value)>::check(i);
|
||||
#endif
|
||||
}
|
||||
|
||||
// Preconditions: *i == v1, *++i == v2
|
||||
template <class Iterator, class T>
|
||||
void bidirectional_iterator_test(Iterator i, T v1, T v2)
|
||||
{
|
||||
forward_iterator_test(i, v1, v2);
|
||||
++i;
|
||||
|
||||
Iterator i1 = i, i2 = i;
|
||||
|
||||
assert(i == i1--);
|
||||
assert(i != --i2);
|
||||
|
||||
trivial_iterator_test(i, i1, v2);
|
||||
trivial_iterator_test(i, i2, v2);
|
||||
|
||||
--i;
|
||||
assert(i == i1);
|
||||
assert(i == i2);
|
||||
++i1;
|
||||
++i2;
|
||||
|
||||
trivial_iterator_test(i, i1, v1);
|
||||
trivial_iterator_test(i, i2, v1);
|
||||
}
|
||||
|
||||
// mutable_bidirectional_iterator_test
|
||||
|
||||
// Preconditions: [i,i+N) is a valid range
|
||||
template <class Iterator, class TrueVals>
|
||||
void random_access_iterator_test(Iterator i, int N, TrueVals vals)
|
||||
{
|
||||
bidirectional_iterator_test(i, vals[0], vals[1]);
|
||||
const Iterator j = i;
|
||||
int c;
|
||||
|
||||
for (c = 0; c < N-1; ++c) {
|
||||
assert(i == j + c);
|
||||
assert(*i == vals[c]);
|
||||
assert(*i == j[c]);
|
||||
assert(*i == *(j + c));
|
||||
assert(*i == *(c + j));
|
||||
++i;
|
||||
assert(i > j);
|
||||
assert(i >= j);
|
||||
assert(j <= i);
|
||||
assert(j < i);
|
||||
}
|
||||
|
||||
Iterator k = j + N - 1;
|
||||
for (c = 0; c < N-1; ++c) {
|
||||
assert(i == k - c);
|
||||
assert(*i == vals[N - 1 - c]);
|
||||
assert(*i == j[N - 1 - c]);
|
||||
Iterator q = k - c;
|
||||
assert(*i == *q);
|
||||
assert(i > j);
|
||||
assert(i >= j);
|
||||
assert(j <= i);
|
||||
assert(j < i);
|
||||
--i;
|
||||
}
|
||||
}
|
||||
|
||||
// Precondition: i != j
|
||||
template <class Iterator, class ConstIterator>
|
||||
void const_nonconst_iterator_test(Iterator i, ConstIterator j)
|
||||
{
|
||||
assert(i != j);
|
||||
assert(j != i);
|
||||
|
||||
ConstIterator k(i);
|
||||
assert(k == i);
|
||||
assert(i == k);
|
||||
|
||||
k = i;
|
||||
assert(k == i);
|
||||
assert(i == k);
|
||||
}
|
||||
|
||||
} // namespace boost
|
||||
|
||||
#endif // BOOST_ITERATOR_TESTS_HPP
|
Reference in New Issue
Block a user