相关疑难解决方法(0)

这是代码:

{-# LANGUAGE FlexibleContexts #-}

import Data.Int
import qualified Data.Vector.Unboxed as U
import qualified Data.Vector.Generic as V

{-# NOINLINE f #-} -- Note the 'NO'
--f :: (Num r, V.Vector v r) => v r -> v r -> v r
--f :: (V.Vector v Int64) => v Int64 -> v Int64 -> v Int64
--f :: (U.Unbox r, Num r) => U.Vector r -> U.Vector r -> U.Vector r
f :: U.Vector Int64 -> U.Vector Int64 -> U.Vector Int64 …