| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef INPUT_ITERATOR_H |
| #define INPUT_ITERATOR_H |
| |
| #include <iterator> |
| |
| template <class It> |
| class input_iterator |
| { |
| It it_; |
| public: |
| typedef typename std::input_iterator_tag iterator_category; |
| typedef typename std::iterator_traits<It>::value_type value_type; |
| typedef typename std::iterator_traits<It>::difference_type difference_type; |
| typedef It pointer; |
| typedef typename std::iterator_traits<It>::reference reference; |
| |
| input_iterator() : it_() {} |
| explicit input_iterator(It it) : it_(it) {} |
| |
| reference operator*() const {return *it_;} |
| pointer operator->() const {return it_;} |
| |
| input_iterator& operator++() {++it_; return *this;} |
| input_iterator operator++(int) {input_iterator tmp(*this); ++(*this); return tmp;} |
| |
| friend bool operator==(const input_iterator& x, const input_iterator& y) |
| {return x.it_ == y.it_;} |
| friend bool operator!=(const input_iterator& x, const input_iterator& y) |
| {return !(x == y);} |
| }; |
| |
| #endif // INPUT_ITERATOR_H |