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haskellghcgadt

When were GADTs introduced in GHC?

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

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

Solution

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

    They are still a language extension, the latest standard, Haskell2010, has not adopted them (since it was a GHC-only extension, afaik).