mirror of https://github.com/lukechilds/node.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
55 lines
1.9 KiB
55 lines
1.9 KiB
// Copyright 2014 the V8 project authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
#ifndef V8_BASE_ITERATOR_H_
|
|
#define V8_BASE_ITERATOR_H_
|
|
|
|
#include <iterator>
|
|
|
|
namespace v8 {
|
|
namespace base {
|
|
|
|
// The intention of the base::iterator_range class is to encapsulate two
|
|
// iterators so that the range defined by the iterators can be used like
|
|
// a regular STL container (actually only a subset of the full container
|
|
// functionality is available usually).
|
|
template <typename ForwardIterator>
|
|
class iterator_range {
|
|
public:
|
|
typedef ForwardIterator iterator;
|
|
typedef ForwardIterator const_iterator;
|
|
typedef typename std::iterator_traits<iterator>::pointer pointer;
|
|
typedef typename std::iterator_traits<iterator>::reference reference;
|
|
typedef typename std::iterator_traits<iterator>::value_type value_type;
|
|
typedef
|
|
typename std::iterator_traits<iterator>::difference_type difference_type;
|
|
|
|
iterator_range() : begin_(), end_() {}
|
|
template <typename ForwardIterator1, typename ForwardIterator2>
|
|
iterator_range(ForwardIterator1&& begin, ForwardIterator2&& end)
|
|
: begin_(std::forward<ForwardIterator1>(begin)),
|
|
end_(std::forward<ForwardIterator2>(end)) {}
|
|
|
|
iterator begin() { return begin_; }
|
|
iterator end() { return end_; }
|
|
const_iterator begin() const { return begin_; }
|
|
const_iterator end() const { return end_; }
|
|
const_iterator cbegin() const { return begin_; }
|
|
const_iterator cend() const { return end_; }
|
|
|
|
bool empty() const { return cbegin() == cend(); }
|
|
|
|
// Random Access iterators only.
|
|
reference operator[](difference_type n) { return begin()[n]; }
|
|
difference_type size() const { return cend() - cbegin(); }
|
|
|
|
private:
|
|
const_iterator const begin_;
|
|
const_iterator const end_;
|
|
};
|
|
|
|
} // namespace base
|
|
} // namespace v8
|
|
|
|
#endif // V8_BASE_ITERATOR_H_
|
|
|