C++ å‚考手册
- C++11
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- å—符串库
- std::basic_string
- std::basic_string_view
- std::basic_string_view<CharT,Traits>::operator=
- std::basic_string_view<CharT,Traits>::begin, std::basic_string_view<CharT,Traits>::cbegin
- std::basic_string_view<CharT,Traits>::end, std::basic_string_view<CharT,Traits>::cend
- std::basic_string_view<CharT,Traits>::basic_string_view
- std::basic_string_view<CharT,Traits>::copy
- std::hash (std::string_view, std::wstring_view, std::u16string_view, std::u32string_view)
- std::basic_string_view<CharT,Traits>::rbegin, std::basic_string_view<CharT,Traits>::crbegin
- std::basic_string_view<CharT,Traits>::rend, std::basic_string_view<CharT,Traits>::crend
- std::basic_string_view<CharT,Traits>::at
- std::basic_string_view<CharT,Traits>::operator[]
- std::basic_string_view<CharT,Traits>::front
- std::basic_string_view<CharT,Traits>::back
- std::basic_string_view<CharT,Traits>::data
- std::basic_string_view<CharT,Traits>::size, std::basic_string_view<CharT,Traits>::length
- std::basic_string_view<CharT,Traits>::max_size
- std::basic_string_view<CharT,Traits>::empty
- std::basic_string_view<CharT,Traits>::remove_prefix
- std::basic_string_view<CharT,Traits>::remove_suffix
- std::basic_string_view<CharT,Traits>::swap
- std::basic_string_view<CharT,Traits>::substr
- std::basic_string_view<CharT,Traits>::compare
- std::basic_string_view<CharT,Traits>::starts_with
- std::basic_string_view<CharT,Traits>::ends_with
- std::basic_string_view<CharT,Traits>::find
- std::basic_string_view<CharT,Traits>::rfind
- std::basic_string_view<CharT,Traits>::find_first_of
- std::basic_string_view<CharT,Traits>::find_last_of
- std::basic_string_view<CharT,Traits>::find_first_not_of
- std::basic_string_view<CharT,Traits>::find_last_not_of
- std::basic_string_view<CharT,Traits>::npos
- operator==,!=,<,<=,>,>=,<=>(std::basic_string_view)
- operator<<(std::basic_string_view)
- std::literals::string_view_literals::operator""sv
- std::basic_string_view 的推导指引
- 空终æ¢å—节å—符串
- 空终æ¢å¤šå—节å—符串
- 空终æ¢å®½å—符串
- std::char_traits
- 注释
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- 实验性 C++ 特性
- 有用的资æº
- 索引
- std 符å·ç´¢å¼•
- åç¨‹æ”¯æŒ (C++20)
- C++ 关键è¯
ä½ç½®ï¼šé¦–页 > C++ å‚考手册 >å—符串库 >std::basic_string_view > std::basic_string_view<CharT,Traits>::substr
std::basic_string_view<CharT,Traits>::substr
返回å串 [pos, pos + rcount) çš„è§†å›¾ï¼Œå…¶ä¸ rcount 是 count 与 size() - pos ä¸è¾ƒå°è€…。
å‚æ•°
| pos | - | 首å—符的ä½ç½® |
| count | - | 请求的长度 |
返回值
å串 [pos, pos + rcount) 的视图。
异常
若 pos > size() 则抛出 std::out_of_range 。
å¤æ‚度
常数。