6 lines
160 B
OCaml
6 lines
160 B
OCaml
type ('s, 't, 'a, 'b) lens = ('s -> 'a) * ('b -> 's -> 't)
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type ('s, 'a) lens' = ('s, 's, 'a, 'a) lens
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let lens ~view ~set = view, set
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let view (get, _) = get
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