Added thirdparty: boost library

thirdparty/include/boost/mysql/detail/results_iterator.hpp

@@ -0,0 +1,99 @@
+//
+// Copyright (c) 2019-2023 Ruben Perez Hidalgo (rubenperez038 at gmail dot com)
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#ifndef BOOST_MYSQL_DETAIL_RESULTS_ITERATOR_HPP
+#define BOOST_MYSQL_DETAIL_RESULTS_ITERATOR_HPP
+
+#include <boost/mysql/resultset.hpp>
+#include <boost/mysql/resultset_view.hpp>
+
+#include <boost/mysql/detail/access.hpp>
+#include <boost/mysql/detail/execution_processor/results_impl.hpp>
+
+namespace boost {
+namespace mysql {
+namespace detail {
+
+class results_iterator
+{
+    const results_impl* self_{};
+    std::size_t index_{};
+
+public:
+    using value_type = resultset;
+    using reference = resultset_view;
+    using pointer = resultset_view;
+    using difference_type = std::ptrdiff_t;
+    using iterator_category = std::random_access_iterator_tag;
+
+    results_iterator() = default;
+    results_iterator(const results_impl* self, std::size_t index) noexcept : self_(self), index_(index) {}
+
+    results_iterator& operator++() noexcept
+    {
+        ++index_;
+        return *this;
+    }
+    results_iterator operator++(int) noexcept
+    {
+        auto res = *this;
+        ++(*this);
+        return res;
+    }
+    results_iterator& operator--() noexcept
+    {
+        --index_;
+        return *this;
+    }
+    results_iterator operator--(int) noexcept
+    {
+        auto res = *this;
+        --(*this);
+        return res;
+    }
+    results_iterator& operator+=(std::ptrdiff_t n) noexcept
+    {
+        index_ += n;
+        return *this;
+    }
+    results_iterator& operator-=(std::ptrdiff_t n) noexcept
+    {
+        index_ -= n;
+        return *this;
+    }
+    results_iterator operator+(std::ptrdiff_t n) const noexcept
+    {
+        return results_iterator(self_, index_ + n);
+    }
+    results_iterator operator-(std::ptrdiff_t n) const noexcept { return *this + (-n); }
+    std::ptrdiff_t operator-(results_iterator rhs) const noexcept { return index_ - rhs.index_; }
+
+    pointer operator->() const noexcept { return **this; }
+    reference operator*() const noexcept { return (*this)[0]; }
+    reference operator[](std::ptrdiff_t i) const noexcept
+    {
+        return access::construct<resultset_view>(*self_, index_ + i);
+    }
+
+    bool operator==(results_iterator rhs) const noexcept { return index_ == rhs.index_; }
+    bool operator!=(results_iterator rhs) const noexcept { return !(*this == rhs); }
+    bool operator<(results_iterator rhs) const noexcept { return index_ < rhs.index_; }
+    bool operator<=(results_iterator rhs) const noexcept { return index_ <= rhs.index_; }
+    bool operator>(results_iterator rhs) const noexcept { return index_ > rhs.index_; }
+    bool operator>=(results_iterator rhs) const noexcept { return index_ >= rhs.index_; }
+
+    std::size_t index() const noexcept { return index_; }
+    const results_impl* obj() const noexcept { return self_; }
+};
+
+inline results_iterator operator+(std::ptrdiff_t n, results_iterator it) noexcept { return it + n; }
+
+}  // namespace detail
+}  // namespace mysql
+}  // namespace boost
+
+#endif