what is storable-complex?

historically, Complex a didn't have a storable instance in base, and thus storable-complex was born!

when might i use this package?

you're using an older ghc/version of base AND calling out to some C or fortran codes around complex numbers. You might find yourself needing this then!

when might i regret using this?

if you're writing your own orphan instances instead of using base-orphans, you might have a bad day, use base-orphans (and storable-complex) instead!