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// This provides a very simple, boring adaptor for a begin and end iterator
// into a range type. This should be used to build range views that work well
// with range based for loops and range based constructors.
//
// Note that code here follows more standards-based coding conventions as it
// is mirroring proposed interfaces for standardization.
//
// Converted from chandlerc@'s code to Google style by joshl@.
#ifndef TENSORFLOW_LIB_GTL_ITERATOR_RANGE_H_
#define TENSORFLOW_LIB_GTL_ITERATOR_RANGE_H_
#include <utility>
namespace tensorflow {
namespace gtl {
// A range adaptor for a pair of iterators.
//
// This just wraps two iterators into a range-compatible interface. Nothing
// fancy at all.
template <typename IteratorT>
class iterator_range {
public:
iterator_range() : begin_iterator_(), end_iterator_() {}
iterator_range(IteratorT begin_iterator, IteratorT end_iterator)
: begin_iterator_(std::move(begin_iterator)),
end_iterator_(std::move(end_iterator)) {}
IteratorT begin() const { return begin_iterator_; }
IteratorT end() const { return end_iterator_; }
private:
IteratorT begin_iterator_, end_iterator_;
};
// Convenience function for iterating over sub-ranges.
//
// This provides a bit of syntactic sugar to make using sub-ranges
// in for loops a bit easier. Analogous to std::make_pair().
template <class T>
iterator_range<T> make_range(T x, T y) {
return iterator_range<T>(std::move(x), std::move(y));
}
} // namespace gtl
} // namespace tensorflow
#endif // TENSORFLOW_LIB_GTL_ITERATOR_RANGE_H_
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