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]

23.4.3.8.7 basic_string​::​contains [string.contains]

constexpr bool contains(basic_string_view<charT, traits> x) const noexcept; constexpr bool contains(charT x) const noexcept; constexpr bool contains(const charT* x) const;
Effects: Equivalent to: return basic_string_view<charT, traits>(data(), size()).contains(x);