How to enable language extensions from GHCi?

Question

I am trying to enable XRankNTypes in GHCi. How to do it?

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haskell language-extension ghci

Matt Fenwick Sep 25 '12 at 14:15

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1 answer

Cat Plus Plus · Accepted Answer · 2012-09-25 14:17

:set -XRankNTypes . The -X part is the compiler, by the way, the extension is simply called RankNTypes .