ikan Uploader :
Directory : /home/ubuntu/node-v16.18.1/deps/v8/src/base/
Upload File : |
| Current File : //home/ubuntu/node-v16.18.1/deps/v8/src/base/iterator.h |
// 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 {
template <class Category, class Type, class Diff = std::ptrdiff_t,
class Pointer = Type*, class Reference = Type&>
struct iterator {
using iterator_category = Category;
using value_type = Type;
using difference_type = Diff;
using pointer = Pointer;
using reference = Reference;
};
// 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:
using iterator = ForwardIterator;
using const_iterator = ForwardIterator;
using pointer = typename std::iterator_traits<iterator>::pointer;
using reference = typename std::iterator_traits<iterator>::reference;
using value_type = typename std::iterator_traits<iterator>::value_type;
using difference_type =
typename std::iterator_traits<iterator>::difference_type;
iterator_range() : begin_(), end_() {}
iterator_range(ForwardIterator begin, ForwardIterator end)
: begin_(begin), end_(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_;
};
template <typename ForwardIterator>
auto make_iterator_range(ForwardIterator begin, ForwardIterator end) {
return iterator_range<ForwardIterator>{begin, end};
}
// {Reversed} returns a container adapter usable in a range-based "for"
// statement for iterating a reversible container in reverse order.
//
// Example:
//
// std::vector<int> v = ...;
// for (int i : base::Reversed(v)) {
// // iterates through v from back to front
// }
template <typename T>
auto Reversed(T& t) { // NOLINT(runtime/references): match {rbegin} and {rend}
return make_iterator_range(std::rbegin(t), std::rend(t));
}
} // namespace base
} // namespace v8
#endif // V8_BASE_ITERATOR_H_
Kontol Shell Bypass