Language extension histories
david.feuer at gmail.com
Sun Nov 1 01:56:16 UTC 2020
That's not all that helpful, because both extensions evolved quite a bit
since their initial introduction.
On Sat, Oct 31, 2020, 9:35 PM Takenobu Tani <takenobu.hs at gmail.com> wrote:
> Maybe the next page is what you want? :
> PatternSynonyms was implemented in GHC 7.8, and TypeFamilyDependencies
> was implemented in GHC 8.0.
> On Sun, Nov 1, 2020 at 2:08 AM David Feuer <david.feuer at gmail.com> wrote:
> > I'm working on some code I want to be compatible with multiple GHC
> versions and I'm trying to figure out which language extensions I can
> reasonably use. I definitely need usable fancy pattern synonyms (not the
> bare-bones ones in 7.8). So that should set a lower bound, but I don't
> remember where. 7.10? 8.0? I'd also *like* to use an injective type family,
> but I can work around that pretty easily with a data family if necessary.
> When did PatternSynonyms and TypeFamilyDependencies each become reasonably
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