[boost] [multiprecision] Creation from a range

Hi John, hi all, Is there any way to create an Integer (or a number) from a range (bounded or counted)?; or from a string_view (string_ref)? Roughly speaking, something like: XintXXX_t make_from_bounded_range(I f, I l); XintXXX_t make_from_counted_range(I f, size_t n); If not exist, I can make a contribution, are you interested? Thank you very much and best regards, Fernando Pelliccioni.