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- std::basic_string
- std::basic_string<CharT,Traits,Allocator>::npos
- std::basic_string<CharT,Traits,Allocator>::at
- std::hash (std::string, std::wstring, std::u16string, std::u32string, std::pmr::string, std::pmr::wstring, std::pmr::u16string, std::pmr::u32string)
- std::basic_string<CharT,Traits,Allocator>::assign
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- std::basic_string<CharT,Traits,Allocator>::basic_string
- std::basic_string<CharT,Traits,Allocator>::operator=
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- std::basic_string<CharT,Traits,Allocator>::front
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- std::basic_string<CharT,Traits,Allocator>::data
- std::basic_string<CharT,Traits,Allocator>::c_str
- std::basic_string<CharT,Traits,Allocator>::operator basic_string_view
- std::basic_string<CharT,Traits,Allocator>::begin, std::basic_string<CharT,Traits,Allocator>::cbegin
- std::basic_string<CharT,Traits,Allocator>::end, std::basic_string<CharT,Traits,Allocator>::cend
- std::basic_string<CharT,Traits,Allocator>::rbegin, std::basic_string<CharT,Traits,Allocator>::crbegin
- std::basic_string<CharT,Traits,Allocator>::rend, std::basic_string<CharT,Traits,Allocator>::crend
- std::basic_string<CharT,Traits,Allocator>::empty
- std::basic_string<CharT,Traits,Allocator>::size, std::basic_string<CharT,Traits,Allocator>::length
- std::basic_string<CharT,Traits,Allocator>::max_size
- std::basic_string<CharT,Traits,Allocator>::reserve
- std::basic_string<CharT,Traits,Allocator>::capacity
- std::basic_string<CharT,Traits,Allocator>::shrink_to_fit
- std::basic_string<CharT,Traits,Allocator>::clear
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- std::basic_string<CharT,Traits,Allocator>::copy
- std::basic_string<CharT,Traits,Allocator>::resize
- std::basic_string<CharT,Traits,Allocator>::swap
- std::basic_string<CharT,Traits,Allocator>::find
- std::basic_string<CharT,Traits,Allocator>::rfind
- std::basic_string<CharT,Traits,Allocator>::find_first_of
- std::basic_string<CharT,Traits,Allocator>::find_first_not_of
- std::basic_string<CharT,Traits,Allocator>::find_last_of
- std::basic_string<CharT,Traits,Allocator>::find_last_not_of
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位置：首页 > C++ 参考手册 >字符串库 >std::basic_string > std::basic_string<CharT,Traits,Allocator>::find_last_not_of
std::basic_string<CharT,Traits,Allocator>::find_last_not_of
| (1) | ||
| size_type find_last_not_of( const basic_string& str, size_type pos = npos ) const; |
(C++11 前) | |
| size_type find_last_not_of( const basic_string& str, size_type pos = npos ) const noexcept; |
(C++11 起) (C++20 前) |
|
| constexpr size_type find_last_not_of( const basic_string& str, size_type pos = npos ) const noexcept; |
(C++20 起) | |
| (2) | ||
| size_type find_last_not_of( const CharT* s, size_type pos, size_type count ) const; |
(C++20 前) | |
| constexpr size_type find_last_not_of( const CharT* s, size_type pos, size_type count ) const; |
(C++20 起) | |
| (3) | ||
| size_type find_last_not_of( const CharT* s, size_type pos = npos ) const; |
(C++20 前) | |
| constexpr size_type find_last_not_of( const CharT* s, size_type pos = npos ) const; |
(C++20 起) | |
| (4) | ||
| size_type find_last_not_of( CharT ch, size_type pos = npos ) const; |
(C++11 前) | |
| size_type find_last_not_of( CharT ch, size_type pos = npos ) const noexcept; |
(C++11 起) (C++20 前) |
|
| constexpr size_type find_last_not_of( CharT ch, size_type pos = npos ) const noexcept; |
(C++20 起) | |
| (5) | ||
| template < class T > size_type |
(C++17 起) (C++20 前) |
|
| template < class T > constexpr size_type |
(C++20 起) | |
寻找不等于给定字符序列中任何字符的最后字符。搜索只考虑区间 [0, pos] 。若区间中不存在这种字符，则返回 npos 。
1) 寻找不等于
str 中任何字符的最后字符。2) 寻找不等于范围
[s, s+count) 中任何字符的最后字符。此范围能包含空字符。3) 寻找不等于
s 所指向的字符串中任何字符的最后字符。用 Traits::length(s) 确定字符串长度。4) 寻找不等于
ch 的最后字符。5) 如同用 std::basic_string_view<CharT, Traits> sv = t; 隐式转换
t 为 string_view sv ，然后寻找不等于 sv 中任何字符的最后字符。此重载仅若 std::is_convertible_v<const T&, std::basic_string_view<CharT, Traits>> 为 true 且 std::is_convertible_v<const T&, const CharT*> 为 false 才参与重载决议。所有情况下均调用 Traits::eq 检查相等性。
参数
| str | - | 鉴别要搜索的字符的 string |
| pos | - | 搜索结束的位置 |
| count | - | 鉴别要搜索的字符的字符串长度 |
| s | - | 指向鉴别要搜索的字符的字符串的指针 |
| ch | - | 鉴别要搜索的字符的字符 |
| t | - | 鉴别要搜索的字符的对象（可转换为 std::basic_string_view ） |
返回值
找到的字符位置，或若找不到这种字符则为 npos 。
异常
5)
noexcept 规定：
noexcept(std::is_nothrow_convertible_v<const T&, std::basic_string_view<charT, traits>>)
缺陷报告
下列更改行为的缺陷报告追溯地应用于以前出版的 C++ 标准。
| DR | 应用于 | 出版时的行为 | 正确行为 |
|---|---|---|---|
| LWG 2946 | C++17 | string_view 重载在某些情况下导致歧义
|
通过使之为模板来避免 |
示例
| 本节未完成 原因：暂无示例 |
参阅
| 于字符串中寻找字符 (公开成员函数) | |
| 寻找子串的最后一次出现 (公开成员函数) | |
| 寻找字符的首次出现 (公开成员函数) | |
| 寻找字符的首次缺失 (公开成员函数) | |
| 寻找字符的最后一次出现 (公开成员函数) |