From 55c93fe609888be73677317978959040cf35b2ff Mon Sep 17 00:00:00 2001
From: HampusM <hampus@hampusmat.com>
Date: Sat, 19 Mar 2022 13:21:54 +0100
Subject: refactor: implement matrix iterator

---
 src/engine/matrix_iterator.hpp | 65 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 65 insertions(+)
 create mode 100644 src/engine/matrix_iterator.hpp

(limited to 'src/engine/matrix_iterator.hpp')

diff --git a/src/engine/matrix_iterator.hpp b/src/engine/matrix_iterator.hpp
new file mode 100644
index 0000000..5d35052
--- /dev/null
+++ b/src/engine/matrix_iterator.hpp
@@ -0,0 +1,65 @@
+#pragma once
+
+#include <gsl/pointers>
+
+template <typename Element>
+class MatrixRowIterator
+{
+public:
+	using ColumnPtr = gsl::owner<Element *>;
+
+	explicit MatrixRowIterator(ColumnPtr column_ptr) noexcept;
+
+	MatrixRowIterator &operator++() noexcept;
+	MatrixRowIterator operator++(int) noexcept;
+
+	Element &operator*() const noexcept;
+
+	bool operator==(const MatrixRowIterator &rhs) const noexcept;
+	bool operator!=(const MatrixRowIterator &rhs) const noexcept;
+
+private:
+	ColumnPtr _column_ptr;
+};
+
+template <typename Element>
+class MatrixRow
+{
+public:
+	using RowPtr = gsl::owner<Element *>;
+
+	explicit MatrixRow(RowPtr row_ptr, const uint32_t &column_cnt) noexcept;
+
+	[[nodiscard]] MatrixRowIterator<Element> begin() const noexcept;
+
+	[[nodiscard]] MatrixRowIterator<Element> end() const noexcept;
+
+private:
+	RowPtr _row_ptr;
+
+	const uint32_t &_column_cnt;
+};
+
+template <typename Element>
+class MatrixIterator
+{
+public:
+	using RowPtr = gsl::owner<Element **>;
+
+	explicit MatrixIterator(RowPtr row_ptr, const uint32_t &column_cnt) noexcept;
+
+	MatrixIterator &operator++() noexcept;
+	MatrixIterator operator++(int) noexcept;
+
+	MatrixRow<Element> operator*() const noexcept;
+
+	bool operator==(const MatrixIterator &rhs) const noexcept;
+	bool operator!=(const MatrixIterator &rhs) const noexcept;
+
+private:
+	RowPtr _row_ptr;
+
+	const uint32_t &_column_cnt;
+};
+
+#include "matrix_iterator.tpp"
-- 
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