10 Jan
2011
10 Jan
'11
11:13 a.m.
On Monday 10 January 2011 16:45:36, Aaron Gray wrote:
This is interesting, what does the following line do :-
data Int24 = I24# Int# deriving (Eq, Ord)
regarding the I24# and Int#, are these inbuilt ?
Int# is the raw machine int (4 or 8 bytes) and I24# is the constructor. GHC uses the magic hash '#' to denote raw unboxed types (and the constructors making ordinary boxed Haskell types from these, e.g. there's data Int = I# Int# data Word = W# Word# data Double = D# Double# and more defined in base [GHC.Types, GHC.Word]).
Thanks,
Aaron