[string.find]

Let F be one of find, rfind, find_first_of, find_last_of, find_first_not_of, and find_last_not_of.

(1.1)
Each member function of the form constexpr size_type F(const basic_string& str, size_type pos) const noexcept; has effects equivalent to: return F(basic_string_view<charT, traits>(str), pos);
(1.2)
Each member function of the form constexpr size_type F(const charT* s, size_type pos) const; has effects equivalent to: return F(basic_string_view<charT, traits>(s), pos);
(1.3)
Each member function of the form constexpr size_type F(const charT* s, size_type pos, size_type n) const; has effects equivalent to: return F(basic_string_view<charT, traits>(s, n), pos);
(1.4)
Each member function of the form constexpr size_type F(charT c, size_type pos) const noexcept; has effects equivalent to: return F(basic_string_view<charT, traits>(addressof(c), 1), pos);

template<class T>
  constexpr size_type find(const T& t, size_type pos = 0) const noexcept(see below);
template<class T>
  constexpr size_type rfind(const T& t, size_type pos = npos) const noexcept(see below);
template<class T>
  constexpr size_type find_first_of(const T& t, size_type pos = 0) const noexcept(see below);
template<class T>
  constexpr size_type find_last_of(const T& t, size_type pos = npos) const noexcept(see below);
template<class T>
  constexpr size_type find_first_not_of(const T& t, size_type pos = 0) const noexcept(see below);
template<class T>
  constexpr size_type find_last_not_of(const T& t, size_type pos = npos) const noexcept(see below);

23 Strings library [strings]

23.4 String classes [string.classes]

23.4.3 Class template basic_string [basic.string]

23.4.3.8 String operations [string.ops]

23.4.3.8.2 Searching [string.find]