default ctor for cell iterator

include/xlnt/worksheet/cell_iterator.hpp

@@ -55,6 +55,11 @@ public:
     using pointer = cell *;
     using reference = cell; // intentionally value
 
+    /// <summary>
+    /// Default constructs a cell_iterator
+    /// </summary>
+    cell_iterator() = default;
+
     /// <summary>
     /// Constructs a cell_iterator from a worksheet, range, and iteration settings.
     /// </summary>
@@ -132,6 +137,27 @@ public:
     cell_iterator operator++(int);
 
 private:
+
+    /// <summary>
+    /// If true, cells that don't exist in the worksheet will be skipped during iteration.
+    /// </summary>
+    bool skip_null_ = false;
+
+    /// <summary>
+    /// If true, when on the last column, the cursor will continue to the next row
+    /// (and vice versa when iterating in column-major order) until reaching the
+    /// bottom right corner of the range.
+    /// </summary>
+    bool wrap_ = false;
+
+    /// <summary>
+    /// The order this iterator will move, by column or by row. Note that
+    /// this has the opposite meaning as in a range_iterator because after
+    /// getting a row-major range_iterator, the row-major cell_iterator will
+    /// iterate over a column and vice versa.
+    /// </summary>
+    major_order order_ = major_order::column;
+
     /// <summary>
     /// The worksheet this iterator will return cells from.
     /// </summary>
@@ -146,26 +172,6 @@ private:
     /// The range of cells this iterator is restricted to
     /// </summary>
     range_reference bounds_;
-
-    /// <summary>
-    /// The order this iterator will move, by column or by row. Note that
-    /// this has the opposite meaning as in a range_iterator because after
-    /// getting a row-major range_iterator, the row-major cell_iterator will
-    /// iterate over a column and vice versa.
-    /// </summary>
-    major_order order_;
-
-    /// <summary>
-    /// If true, cells that don't exist in the worksheet will be skipped during iteration.
-    /// </summary>
-    bool skip_null_;
-
-    /// <summary>
-    /// If true, when on the last column, the cursor will continue to the next row
-    /// (and vice versa when iterating in column-major order) until reaching the
-    /// bottom right corner of the range.
-    /// </summary>
-    bool wrap_;
 };
 
 /// <summary>
@@ -183,6 +189,11 @@ public:
     using pointer = const cell *;
     using reference = const cell; // intentionally value
 
+    /// <summary>
+    /// Default constructs a cell_iterator
+    /// </summary>
+    const_cell_iterator() = default;
+
     /// <summary>
     /// Constructs a cell_iterator from a worksheet, range, and iteration settings.
     /// </summary>
@@ -254,6 +265,26 @@ public:
     const_cell_iterator operator++(int);
 
 private:
+    /// <summary>
+    /// If true, cells that don't exist in the worksheet will be skipped during iteration.
+    /// </summary>
+    bool skip_null_ = false;
+
+    /// <summary>
+    /// If true, when on the last column, the cursor will continue to the next row
+    /// (and vice versa when iterating in column-major order) until reaching the
+    /// bottom right corner of the range.
+    /// </summary>
+    bool wrap_ = false;
+
+    /// <summary>
+    /// The order this iterator will move, by column or by row. Note that
+    /// this has the opposite meaning as in a range_iterator because after
+    /// getting a row-major range_iterator, the row-major cell_iterator will
+    /// iterate over a column and vice versa.
+    /// </summary>
+    major_order order_ = major_order::column;
+
     /// <summary>
     /// The worksheet this iterator will return cells from.
     /// </summary>
@@ -268,26 +299,6 @@ private:
     /// The range of cells this iterator is restricted to
     /// </summary>
     range_reference bounds_;
-
-    /// <summary>
-    /// The order this iterator will move, by column or by row. Note that
-    /// this has the opposite meaning as in a range_iterator because after
-    /// getting a row-major range_iterator, the row-major cell_iterator will
-    /// iterate over a column and vice versa.
-    /// </summary>
-    major_order order_;
-
-    /// <summary>
-    /// If true, cells that don't exist in the worksheet will be skipped during iteration.
-    /// </summary>
-    bool skip_null_;
-
-    /// <summary>
-    /// If true, when on the last column, the cursor will continue to the next row
-    /// (and vice versa when iterating in column-major order) until reaching the
-    /// bottom right corner of the range.
-    /// </summary>
-    bool wrap_;
 };
 
 } // namespace xlnt