mirror of https://github.com/tfussell/xlnt
274 lines
8.2 KiB
C++
274 lines
8.2 KiB
C++
// Copyright (c) 2014-2021 Thomas Fussell
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE
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//
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// @license: http://www.opensource.org/licenses/mit-license.php
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// @author: see AUTHORS file
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#pragma once
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#include <cstddef> // std::ptrdiff_t
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#include <xlnt/xlnt_config.hpp>
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#include <xlnt/cell/cell_reference.hpp>
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#include <xlnt/worksheet/major_order.hpp>
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#include <xlnt/worksheet/range_reference.hpp>
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#include <xlnt/worksheet/worksheet.hpp>
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namespace xlnt {
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class cell_vector;
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/// <summary>
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/// An iterator used by worksheet and range for traversing
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/// a 2D grid of cells by row/column then across that row/column.
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/// </summary>
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class XLNT_API range_iterator
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{
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public:
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/// <summary>
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/// iterator tags required for use with standard algorithms and adapters
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/// </summary>
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using iterator_category = std::bidirectional_iterator_tag;
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using value_type = cell_vector;
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using difference_type = std::ptrdiff_t;
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using pointer = cell_vector *;
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using reference = cell_vector; // intentionally value
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/// <summary>
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/// Default constructs a range iterator
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/// </summary>
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range_iterator() = default;
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/// <summary>
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/// Constructs a range iterator on a worksheet, cell pointing to the current
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/// row or column, range bounds, an order, and whether or not to skip null column/rows.
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/// </summary>
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range_iterator(worksheet &ws, const cell_reference &cursor,
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const range_reference &bounds, major_order order, bool skip_null);
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/// <summary>
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/// Default copy constructor.
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/// </summary>
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range_iterator(const range_iterator &) = default;
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/// <summary>
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/// Default assignment operator.
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/// </summary>
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range_iterator &operator=(const range_iterator &) = default;
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/// <summary>
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/// Default move constructor.
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/// </summary>
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range_iterator(range_iterator &&) = default;
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/// <summary>
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/// Default move assignment operator.
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/// </summary>
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range_iterator &operator=(range_iterator &&) = default;
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/// <summary>
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/// Default destructor
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/// </summary>
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~range_iterator() = default;
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/// <summary>
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/// Dereference the iterator to return a column or row.
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/// </summary>
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reference operator*();
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/// <summary>
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/// Dereference the iterator to return a column or row.
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/// </summary>
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const reference operator*() const;
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/// <summary>
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/// Returns true if this iterator is equivalent to other.
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/// </summary>
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bool operator==(const range_iterator &other) const;
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/// <summary>
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/// Returns true if this iterator is not equivalent to other.
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/// </summary>
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bool operator!=(const range_iterator &other) const;
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/// <summary>
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/// Pre-decrement the iterator to point to the previous row/column.
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/// </summary>
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range_iterator &operator--();
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/// <summary>
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/// Post-decrement the iterator to point to the previous row/column.
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/// </summary>
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range_iterator operator--(int);
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/// <summary>
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/// Pre-increment the iterator to point to the next row/column.
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/// </summary>
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range_iterator &operator++();
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/// <summary>
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/// Post-increment the iterator to point to the next row/column.
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/// </summary>
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range_iterator operator++(int);
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private:
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/// <summary>
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/// If true, empty rows and cells will be skipped when iterating with this iterator
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/// </summary>
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bool skip_null_ = false;
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/// <summary>
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/// Whether rows or columns should be iterated over first
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/// </summary>
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major_order order_ = major_order::column;
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/// <summary>
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/// The worksheet
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/// </summary>
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worksheet ws_;
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/// <summary>
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/// The first cell in the current row/column
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/// </summary>
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cell_reference cursor_;
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/// <summary>
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/// The bounds of the range
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/// </summary>
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range_reference bounds_;
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};
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/// <summary>
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/// A const version of range_iterator which does not allow modification
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/// to the dereferenced cell_vector.
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/// </summary>
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class XLNT_API const_range_iterator
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{
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public:
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/// <summary>
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/// this iterator meets the interface requirements of bidirection_iterator
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/// </summary>
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using iterator_category = std::bidirectional_iterator_tag;
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using value_type = const cell_vector;
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using difference_type = std::ptrdiff_t;
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using pointer = const cell_vector *;
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using reference = const cell_vector; // intentionally value
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/// <summary>
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/// Default constructs a range iterator
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/// </summary>
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const_range_iterator() = default;
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/// <summary>
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/// Constructs a range iterator on a worksheet, cell pointing to the current
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/// row or column, range bounds, an order, and whether or not to skip null column/rows.
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/// </summary>
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const_range_iterator(const worksheet &ws, const cell_reference &cursor,
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const range_reference &bounds, major_order order, bool skip_null);
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/// <summary>
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/// Default copy constructor.
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/// </summary>
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const_range_iterator(const const_range_iterator &) = default;
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/// <summary>
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/// Default assignment operator.
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/// </summary>
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const_range_iterator &operator=(const const_range_iterator &) = default;
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/// <summary>
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/// Default move constructor.
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/// </summary>
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const_range_iterator(const_range_iterator &&) = default;
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/// <summary>
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/// Default move assignment operator.
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/// </summary>
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const_range_iterator &operator=(const_range_iterator &&) = default;
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/// <summary>
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/// Default destructor
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/// </summary>
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~const_range_iterator() = default;
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/// <summary>
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/// Dereferennce the iterator to return the current column/row.
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/// </summary>
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const reference operator*() const;
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/// <summary>
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/// Returns true if this iterator is equivalent to other.
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/// </summary>
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bool operator==(const const_range_iterator &other) const;
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/// <summary>
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/// Returns true if this iterator is not equivalent to other.
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/// </summary>
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bool operator!=(const const_range_iterator &other) const;
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/// <summary>
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/// Pre-decrement the iterator to point to the next row/column.
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/// </summary>
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const_range_iterator &operator--();
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/// <summary>
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/// Post-decrement the iterator to point to the next row/column.
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/// </summary>
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const_range_iterator operator--(int);
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/// <summary>
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/// Pre-increment the iterator to point to the next row/column.
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/// </summary>
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const_range_iterator &operator++();
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/// <summary>
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/// Post-increment the iterator to point to the next row/column.
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/// </summary>
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const_range_iterator operator++(int);
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private:
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/// <summary>
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/// If true, empty rows and cells will be skipped when iterating with this iterator
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/// </summary>
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bool skip_null_ = false;
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/// <summary>
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/// Determines whether iteration should move through rows or columns first
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/// </summary>
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major_order order_ = major_order::column;
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/// <summary>
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/// The implementation of the worksheet this iterator points to
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/// </summary>
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detail::worksheet_impl *ws_;
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/// <summary>
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/// The first cell in the current row or column this iterator points to
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/// </summary>
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cell_reference cursor_;
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/// <summary>
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/// The range this iterator starts and ends in
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/// </summary>
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range_reference bounds_;
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};
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} // namespace xlnt
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