std::basic_string_view<CharT,Traits>::find_first_of (3) - Linux Manuals

std::basic_string_view<CharT,Traits>::find_first_of: std::basic_string_view<CharT,Traits>::find_first_of

NAME

std::basic_string_view<CharT,Traits>::find_first_of - std::basic_string_view<CharT,Traits>::find_first_of

Synopsis


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
find (public member function)
                  find the last occurrence of a substring
rfind (public member function)
                  find last occurrence of characters
find_last_of (public member function)
                  find first absence of characters
find_first_not_of (public member function)
                  find last absence of characters
find_last_not_of (public member function)

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