[Haskell-cafe] Kind of confusing

Philippa Cowderoy flippa at flippac.org
Tue May 12 09:09:35 EDT 2009

On Mon, 2009-05-11 at 20:43 -0400, Anton van Straaten wrote:
> Serious question: what is the significance of the question mark and 
> double question marks in those signatures, or better yet, where can I 
> read about it?

I've forgotten where to find the details (try the GHC manual if you
haven't already?), but IIRC they're part of how GHC handles boxing.

Philippa Cowderoy <flippa at flippac.org>

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