thin-provisioning-tools/persistent-data/range.h

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#ifndef PERSISTENT_DATA_RANGE_H
#define PERSISTENT_DATA_RANGE_H
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#include <boost/optional.hpp>
#include <ostream>
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//----------------------------------------------------------------
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namespace base {
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template <typename T>
class range {
public:
typedef boost::optional<T> maybe;
range(maybe begin = maybe(), maybe end = maybe())
: begin_(begin),
end_(end) {
}
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bool operator ==(range<T> const &r) const {
return (begin_ == r.begin_ && end_ == r.end_);
}
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maybe begin_;
maybe end_;
};
template <typename T>
std::ostream &
operator <<(std::ostream &out, range<T> const &r) {
if (r.begin_)
out << "[" << *r.begin_;
else
out << "[-";
out << ", ";
if (r.end_)
out << *r.end_ << "]";
else
out << "-]";
return out;
}
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}
//----------------------------------------------------------------
#endif