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
Yes, I think extra commas in the middle could be useful as well... On 23.09.2014 18:47, David Feuer wrote:
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
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-- Andreas Abel <>< Du bist der geliebte Mensch. Department of Computer Science and Engineering Chalmers and Gothenburg University, Sweden andreas.abel@gu.se http://www2.tcs.ifi.lmu.de/~abel/
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David Feuer