Re: [commit: packages/unix] master: Fix assumption that RLIM_INFINITY is a simple number (b092e35)

On Sun, Oct 13, 2013 at 12:20 AM, Herbert Valerio Riedel wrote:

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unpackRLimit :: CRLim -> ResourceLimit unpackRLimit (#const RLIM_INFINITY) = ResourceLimitInfinity

[...]

I wonder though, how could that even have compiled in the past on OSX if the expanded RLIM_INFINITY macro #define in the LHS pattern wouldn't result in a simple number?

You'll want to take a look at what hsc2hs actually does here to really understand :-) In short, a constant C-level expression is fine if used in a #const construct, regardless of it containing embedded casts and whatnot.