On Sat, Jul 14, 2012 at 3:16 AM, Henning Thielemann < lemming@henning-thielemann.de> wrote:
On Fri, 13 Jul 2012, Brandon Allbery wrote:
And now I'm having a "so what's the point?" moment? All this effort so
we can just mark random stuff as Trusted anyway?
Today we have 'unsafePerformIO'. So if we praise the merits of Haskell's strong type system and then mention 'unsafePerformIO' the audience will ask "so what's the point of type safety then?" Well, the point is that unsafePerformIO is strongly discouraged and every use of it should be considered carefully.
We've just been told *not* to consider carefully for purposes of marking a module as Trustworthy; an argument based on considering carefully is not relevant.
I think the idea here is that, as a package author, it's okay to just throw Trustworthy anywhere ghc can't infer Safe on its own. As a package user, if you care about Safe Haskell, it's your responsibility to audit/consider carefully to determine if Trustworthy code is something you're willing to include in your codebase. John L.