V8 API Reference, 7.2.502.16 (for Deno 0.2.4)
iterator.h
1 // Copyright 2014 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 
5 #ifndef V8_BASE_ITERATOR_H_
6 #define V8_BASE_ITERATOR_H_
7 
8 #include <iterator>
9 
10 namespace v8 {
11 namespace base {
12 
13 template <class Category, class Type, class Diff = std::ptrdiff_t,
14  class Pointer = Type*, class Reference = Type&>
15 struct iterator {
16  typedef Category iterator_category;
17  typedef Type value_type;
18  typedef Diff difference_type;
19  typedef Pointer pointer;
20  typedef Reference reference;
21 };
22 
23 // The intention of the base::iterator_range class is to encapsulate two
24 // iterators so that the range defined by the iterators can be used like
25 // a regular STL container (actually only a subset of the full container
26 // functionality is available usually).
27 template <typename ForwardIterator>
29  public:
30  typedef ForwardIterator iterator;
31  typedef ForwardIterator const_iterator;
32  typedef typename std::iterator_traits<iterator>::pointer pointer;
33  typedef typename std::iterator_traits<iterator>::reference reference;
34  typedef typename std::iterator_traits<iterator>::value_type value_type;
35  typedef
36  typename std::iterator_traits<iterator>::difference_type difference_type;
37 
38  iterator_range() : begin_(), end_() {}
39  template <typename ForwardIterator1, typename ForwardIterator2>
40  iterator_range(ForwardIterator1&& begin, ForwardIterator2&& end)
41  : begin_(std::forward<ForwardIterator1>(begin)),
42  end_(std::forward<ForwardIterator2>(end)) {}
43 
44  iterator begin() { return begin_; }
45  iterator end() { return end_; }
46  const_iterator begin() const { return begin_; }
47  const_iterator end() const { return end_; }
48  const_iterator cbegin() const { return begin_; }
49  const_iterator cend() const { return end_; }
50 
51  bool empty() const { return cbegin() == cend(); }
52 
53  // Random Access iterators only.
54  reference operator[](difference_type n) { return begin()[n]; }
55  difference_type size() const { return cend() - cbegin(); }
56 
57  private:
58  const_iterator const begin_;
59  const_iterator const end_;
60 };
61 
62 } // namespace base
63 } // namespace v8
64 
65 #endif // V8_BASE_ITERATOR_H_
Definition: libplatform.h:13