From efe0aeed5f1854628df8bace645a072d569fe7b9 Mon Sep 17 00:00:00 2001
From: Adrian Kummerlaender
Date: Sat, 10 Dec 2016 15:39:39 +0100
Subject: Introduce `BoxIndicator` and `BoxTraverser` helper classes

`BoxIndicator` implements an indicator function for the world area. Together with `BoxTraverser` it is used to simplifiy action validation and area traversion.
---
 src/box_traverser.h | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 src/box_traverser.h

(limited to 'src/box_traverser.h')

diff --git a/src/box_traverser.h b/src/box_traverser.h
new file mode 100644
index 0000000..1bc0edd
--- /dev/null
+++ b/src/box_traverser.h
@@ -0,0 +1,26 @@
+#ifndef LIFE_SRC_BOX_TRAVERSER_
+#define LIFE_SRC_BOX_TRAVERSER_
+
+#include <functional>
+
+#include "box_indicator.h"
+
+namespace life {
+namespace util {
+
+struct BoxTraverser : public BoxIndicator {
+	using BoxIndicator::BoxIndicator;
+
+	void for_each(const std::function<void(std::size_t, std::size_t)> f) const {
+		for ( std::size_t x = this->a_x_; x < this->b_x_; x++ ) {
+			for ( std::size_t y = this->a_y_; y < this->b_y_; y++ ) {
+				f(x, y);
+			}
+		}
+	}
+};
+
+}
+}
+
+#endif  // LIFE_SRC_BOX_TRAVERSER_
-- 
cgit v1.2.3