I know the short-term answer is use TH to derive folds if
I want them, but I think such an important concept should probably
be part of the language.
The fold function is an example of a generic program, which can
be defined using generic programming libraries. Since the fold
has to know about
I've had to use some fold functions recently and I've come to
the conclusion that Haskell should automatically generate
fold functions for data definitions. To clarify what I mean,
for the data definition:
data MyData = This Int Char | That String Int Int
there should be a matching
Tim Newsham wrote:
I know the short-term answer is use TH to derive folds if
I want them, but I think such an important concept should probably
be part of the language.
If you don't mind the hairy code, there's always this generic answer
from #haskell almost a year ago:
