12 lines
329 B
OCaml
12 lines
329 B
OCaml
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[@@@warning "-20"]
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external observe : 'a -> 'b = "observe"
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let mm = function
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| [(1, 2), 2]::[] -> observe ([(1, 2), 2]::[])
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| [(1, 2), 2]::_ -> observe [(1, 2), 2]
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| [(1, 2), x]::_ -> observe [(1, 2), x]
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| [x]::[] -> observe [x]
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| [x]::[y]::[] -> observe [x, y]
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| [x, y]::z -> observe [(x, y), z]
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| x -> observe x
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