96 lines
1.8 KiB
C++
96 lines
1.8 KiB
C++
#ifndef QUERY_QUERY_RESULT_HPP
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#define QUERY_QUERY_RESULT_HPP
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#include <memory>
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namespace matador::sql {
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template < typename Type >
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class query_result;
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template < typename Type >
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class query_result_iterator
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{
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public:
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using iterator_category = std::forward_iterator_tag;
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using value_type = Type;
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using difference_type = std::ptrdiff_t;
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using pointer = value_type*; /**< Shortcut for the pointer type. */
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using reference = value_type&; /**< Shortcut for the reference type */
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public:
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query_result_iterator() = default;
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explicit query_result_iterator(query_result<Type> &res, Type *obj = nullptr)
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: obj_(obj)
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, result_(res)
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{}
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query_result_iterator(query_result_iterator&& x) noexcept
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: obj_(std::move(x.obj_))
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, result_(x.result_)
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{}
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query_result_iterator& operator=(query_result_iterator&& x) noexcept
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{
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result_ = x.result_;
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obj_ = std::move(x.obj_);
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return *this;
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}
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~query_result_iterator() = default;
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bool operator==(const query_result_iterator& rhs)
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{
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return obj_ == rhs.obj_;
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}
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bool operator!=(const query_result_iterator& rhs)
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{
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return obj_ != rhs.obj_;
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}
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pointer operator->()
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{
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return obj_.get();
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}
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reference operator&()
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{
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return &obj_.get();
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}
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std::unique_ptr<Type> operator*()
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{
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return std::move(obj_);
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}
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pointer get()
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{
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return obj_.get();
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}
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pointer release()
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{
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return obj_.release();
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}
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protected:
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std::unique_ptr<Type> obj_;
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query_result<Type> &result_;
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};
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template < typename Type >
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class query_result
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{
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public:
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query_result(std::string sql) : sql_(std::move(sql)) {}
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[[nodiscard]] const std::string& str() const { return sql_; }
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Type begin() { return {}; }
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private:
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std::string sql_;
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};
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}
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#endif //QUERY_QUERY_RESULT_HPP
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