Re: ghc-devs Digest, Vol 133, Issue 40

Simon Peyton Jones wrote:

anywhere, I think. You might want a new HsSyn data type for "list with possible leading or trailing commas":

data HsCommadList a = HCL Int -- Number of leading commas [a] Int -- Number of trailing commas

If we're going to go to the trouble of supporting extra leading and trailing commas, why not also support extra commas in the middle? That way, #include "theseexports" , #include "thoseexports" doesn't have to worry about how these and those exports are listed. David