What is a common idiom for converting between Integral types?

I want to convert between various integral types; for example Word32 and Word8.

What is the idiomatic way to do this in Haskell?

Word8 -> Word32 conversion ca开发者_开发百科n always succeed. Word32 -> Word8 conversion might result in an overflow and I'll deal with that (either by testing explicitly or getting an indication from whatever the conversion idiom is).

---

fromIntegral will convert from an integral type to any numeric type, including other integral types

---

See Converting Numbers in the Haskell wiki