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I want to get the currently active tag in xmonad as a string. I've imported the stackset with

import qualified XMonad.StackSet as W

I can get get the tag of the currently focused workspace with W.currentTag, but it's type is StackSet i0 l0 a0 s0 sd0 -> i0

How do I convert this to a string?

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i is of type http://hackage.haskell.org/package/xmonad-0.15/docs/XMonad-Core.html#t:WindowSet which is a type alias for String.

currentTag will evaluate to String if you give it a parameter relating to StackSet.

http://hackage.haskell.org/package/xmonad-0.15/docs/XMonad-Core.html#v:withWindowSet is what you could use.

So I think you can do: withWindowSet (pure . currentTag) this is an expression of type X String


It's also available here: https://hackage.haskell.org/package/xmonad-contrib-0.15/docs/XMonad-Util-Loggers.html#v:logCurrent

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