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Created August 23, 2021 11:36
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*Odin.Core Optics> view (_Just % _1) (Just ("foo", 1))
<interactive>:5:1: error:
• An_AffineTraversal cannot be used as A_Getter
Perhaps you meant one of these:
‘preview’ (from Optics.AffineFold)
‘over’ (from Optics.Setter)
‘set’ (from Optics.Setter)
‘(^?)’ ‘(%~)’ ‘(.~)’ (from Optics.Operators)
• In the expression: view (_Just % _1) (Just ("foo", 1))
In an equation for ‘it’: it = view (_Just % _1) (Just ("foo", 1))
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