From source you'd be looking at using haskell-src-exts. Alternately:

- echo :browse | ghci foo.hs

- compile it, dump the .hi file (ghc --show-iface foo.hi) likely with postprocessing to only show the types

On Thu, May 4, 2017 at 3:30 AM, Andrew Butterfield <Andrew.Butterfield@scss.tcd.ie> wrote:
Dear Haskellers,
 any quick and easy way to extract all the type declarations from a Haskell source file?
(for easy reference)

Regards,

Andrew Butterfield
School of Computer Science & Statistics
Trinity College
Dublin 2, Ireland

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