std::ranges::transform_view<V,F>::iterator<Const>::operator++,--,+=,-=
来自cppreference.com
< cpp | ranges | transform view | iterator
| constexpr /*iterator*/& operator++(); |
(1) | (C++20 起) |
| constexpr void operator++( int ); |
(2) | (C++20 起) |
| constexpr /*iterator*/ operator++( int ) requires ranges::forward_range<Base>; |
(3) | (C++20 起) |
| constexpr /*iterator*/& operator--() requires ranges::bidirectional_range<Base>; |
(4) | (C++20 起) |
| constexpr /*iterator*/ operator--( int ) requires ranges::bidirectional_range<Base>; |
(5) | (C++20 起) |
| constexpr /*iterator*/& operator+=( difference_type n ) requires ranges::random_access_range<Base>; |
(6) | (C++20 起) |
| constexpr /*iterator*/& operator-=( difference_type n ) requires ranges::random_access_range<Base>; |
(7) | (C++20 起) |
增加或减少迭代器。
令 current_ 为底层迭代器。
1) 等价于 ++current_; return *this;
2) 等价于 ++current_;
3) 等价于 auto tmp = *this; ++*this; return tmp;
4) 等价于 --current_; return *this;
5) 等价于 auto tmp = *this; --*this; return tmp;
6) 等价于 current_ += n; return *this;
7) 等价于 current_ -= n; return *this;
参数
| n | - | 相对于当前位置的位置 |
返回值
1,4,6,7) *this
3,5) 修改前作出的 *this 的副本
