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]

23.4.3.8.5 basic_­string​::​starts_­with [string.starts.with]

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