Namespace string_token Types Name Description append_to_t arg Base class for string tokens, and algorithm parameters assign_to_t is_token is_token<T, void_t<decltype(std::declval<T&>().prepare( std::declval<std::size_t>())), decltype(std::declval<T&>().result())>> preserve_size_t return_string Functions Name Description append_to assign_to preserve_size