When were GADTs introduced in the GHC?

Question

When were GADTs introduced in the GHC? (version + date)

Also, are they still considered a language extension or are they now part of the standard Haskell?

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Jon smark Mar 14 '13 at 14:43

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1 answer

Daniel Fischer · Accepted Answer · 2013-03-14T14:51:13+0000

GADTs were first supported in ghc-6.4 , which was released in March 2005.

They are still a language extension, the latest standard, Haskell2010, did not accept them (since it was a GHC extension, afaik).