[Haskell-cafe] time and TimeLocale compatibility

Alberto Valverde alberto at toscat.net
Sun Mar 22 09:31:00 UTC 2015

Hi Tom,

This worked for me:


On Sunday, March 22, 2015, Tom Ellis <
tom-lists-haskell-cafe-2013 at jaguarpaw.co.uk> wrote:

> Hello all,
> The `formatTime` function from time-1.4 uses the TimeLocale type from
> old-locale, whereas time-1.5 provides its own definition of the TimeLocale
> type.  I want to provide `formatTime` with the argument
> `defaultTimeLocale`.
> 1.4 requires the version in old-locale whereas 1.5 requires the version it
> defines itself.
> Is it possible to use this function in a way that is compatible with both
> 1.4 and 1.5?  If time-1.5 had merely reexported the old-locale version, and
> then (the future) time-1.6 replaced it completely this would have offered a
> smoother upgrade path, but as far as I can tell nothing like this was done.
> What are my options?
> Tom
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