fst -package:relude

Extract the first component of a pair.
Extract the first component of a strict pair.
First of a tuple
Extract the first component of a pair.
Helper function for accessing the first field of a Pair
Extract the fst component of a pair.
Not on Stackage, so not searched. Finite state transducers
Project the first component of a type-level tuple.
>>> :kind! Fst '(Bool, Char)
Fst '(Bool, Char) :: *
= Bool
Create a new simple unit identifier from a FastString. Internally, this is primarily used to specify wired-in unit identifiers.
Extract the fst of a triple.