Interpreting the strictness annotations output by ghc --show-iface

Johan Tibell johan.tibell at
Thu Mar 8 02:01:34 CET 2012

On Wed, Mar 7, 2012 at 4:38 PM, Brandon Allbery <allbery.b at> wrote:
> I think the original type signature is needed to figure it out.  In the
> earlier example it indicated ghc drilling down into the type (a tuple) and
> determining the strictness of the constituents.

I parenthesis were for tuples I would never expect to see e.g. U(L).

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