On 2015-10-24 at 12:19:38 +0200, lennart spitzner wrote:
hi,
should we use #if __GLASGOW_HASKELL__ < 710 or #if !MIN_VERSION_base(4,8,0) ?
currently both are used in different places, and i have no idea if there is a difference/if it matters. if it does not, i suggest conventionizing one of the two.
IMO, guarding with MIN_VERSION_base() ought to refer to properties of the `base` library (e.g. availability of class instances or other symbols), while guarding with __GLASGOW_HASKELL__ should refer to properties (e.g. availability/semantics of language pragmas) and use of a specific GHC version. While we currently have a 1:1 relationship between base and GHC, this wasn't always the case (and it may make sense to relax this constraint again at some point in the future). Cheers, hvr