saturating_mul methods?

[SimonSapin]

Integers have checked_add, checked_mul, and saturating_add methods, but not saturating_mul. Is there a reason not to have this in std?

CC @aturon

[pnkfelix]

I suspect we want the full set, saturating_add, saturating_sub, saturating_mul, saturating_div (not sure about whether saturating_rem makes any sense).

See also rust-lang/rfcs#928 and rust-lang/rfcs#964

[apasel422]

saturating_mul now exists for all integer types.

[alexcrichton]

Yay!