[base] Move run_set to namespace base

base/run.h

@@ -0,0 +1,71 @@
+#ifndef BASE_DATA_RANGE_H
+#define BASE_DATA_RANGE_H
+
+#include <boost/optional.hpp>
+#include <ostream>
+
+//----------------------------------------------------------------
+
+namespace base {
+	template <typename T>
+	class run {
+	public:
+		typedef boost::optional<T> maybe;
+
+		run() {
+		}
+
+		explicit run(T const &b)
+			: begin_(b) {
+		}
+
+		run(T const &b, T const &e)
+			: begin_(b),
+			  end_(e) {
+		}
+
+		explicit run(maybe begin, maybe end)
+			: begin_(begin),
+			  end_(end) {
+		}
+
+		bool operator ==(run<T> const &r) const {
+			return (begin_ == r.begin_ && end_ == r.end_);
+		}
+
+		bool contains(T const &v) const {
+			if (begin_ && v < *begin_)
+				return false;
+
+			if (end_ && v >= *end_)
+				return false;
+
+			return true;
+		}
+
+		maybe begin_;
+		maybe end_;
+	};
+
+	template <typename T>
+	std::ostream &
+	operator <<(std::ostream &out, run<T> const &r) {
+		if (r.begin_)
+			out << "[" << *r.begin_;
+		else
+			out << "[-";
+
+		out << ", ";
+
+		if (r.end_)
+			out << *r.end_ << "]";
+		else
+			out << "-]";
+
+		return out;
+	}
+}
+
+//----------------------------------------------------------------
+
+#endif