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- 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
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- 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)
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ä½ç½®ï¼šé¦–页 > C++ å‚考手册 >å—符串库 >std::basic_string_view > std::basic_string_view<CharT,Traits>::find_first_of
std::basic_string_view<CharT,Traits>::find_first_of
寻找首个ç‰äºŽç»™å®šå—符åºåˆ—ä¸ä»»æ„å—符的å—符。
1) 寻找
v çš„ä»»æ„å—符在æ¤è§†å›¾ä¸çš„首次出现，从ä½ç½® pos 开始。2) ç‰ä»·äºŽ find_first_of(basic_string_view(std::addressof(c), 1), pos) 。
3) ç‰ä»·äºŽ find_first_of(basic_string_view(s, count), pos) 。
4) ç‰ä»·äºŽ find_first_of(basic_string_view(s), pos) 。
å‚æ•°
| v | - | è¦æœç´¢çš„视图 |
| pos | - | è¦å¼€å§‹æœç´¢çš„ä½ç½® |
| count | - | è¦æœç´¢çš„å—符串的长度 |
| s | - | 指å‘è¦æœç´¢çš„å—符串的指针 |
| c | - | è¦æœç´¢çš„å—符 |
返回值
å串的任æ„å—符的首次出现ä½ç½®ï¼Œæˆ–者若找ä¸åˆ°è¿™äº›å—符则为 npos 。
å¤æ‚度
最å情况为 O(size() * v.size()) 。