20 lines
310 B
OCaml
20 lines
310 B
OCaml
type 'a queue = { front : 'a list; back : 'a list }
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type 'a result =
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| Error of string
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| Success of 'a
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type 'a stack =
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| Empty
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| Stacked of 'a * 'a stack
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type 'a tree =
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| Leaf
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| Branch of 'a * 'a tree list
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let id (x : 'a) = x
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let ( >> ) f g x = g (f x)
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let ( << ) g f x = g (f x) |