std::basic_string_view<CharT,Traits>::find_first_of
constexpr size_type find_first_of(basic_string_view v, size_type pos = 0) const noexcept; | (1) | (since C++17) |
constexpr size_type find_first_of(CharT c, size_type pos = 0) const noexcept; | (2) | (since C++17) |
constexpr size_type find_first_of(const CharT* s, size_type pos, size_type count) const; | (3) | (since C++17) |
constexpr size_type find_first_of(const CharT* s, size_type pos = 0) const; | (4) | (since C++17) |
Finds the first character equal to any of the characters in the given character sequence.
1) Finds the first occurence of any of the characters of
v in this view, starting at position pos.
2) Equivalent to
find_first_of(basic_string_view(std::addressof(c), 1), pos).
3) Equivalent to
find_first_of(basic_string_view(s, count), pos).
4) Equivalent to
find_first_of(basic_string_view(s), pos).Parameters
| v | - | view to search for |
| pos | - | position at which to start the search |
| count | - | length of the string of characters to search for |
| s | - | pointer to a string of characters to search for |
| ch | - | character to search for |
Return value
Position of the first occurrence of any character of the substring, or npos if no such character is found.
Complexity
O(size() * v.size()) at worst.
See also
| find characters in the view (public member function) |
|
| find the last occurrence of a substring (public member function) |
|
| find last occurrence of characters (public member function) |
|
| find first absence of characters (public member function) |
|
| find last absence of characters (public member function) |
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