Created
February 26, 2018 02:06
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| type strTree = | |
| St of int | |
| | Leaf of string | |
| | Tree of string * string * strTree list;; | |
| let rec trees acc tree = | |
| match tree with | |
| | Tree (_, _, c) -> acc @ [tree] @ (List.fold_left (trees) [] c) | |
| | _ -> acc;; | |
| let rec stIfy pointer acc (trees: strTree list) = | |
| match trees with | |
| | [] -> acc | |
| | [St num] -> acc @ [St num] | |
| | [_] -> acc @ [St (pointer+1)] | |
| | (St num) :: t -> stIfy (pointer+1) (acc @ [St num]) t | |
| | _ :: t -> stIfy (pointer+1) (acc @ [St (pointer+1)]) t;; | |
| let rec treeList (acc: (int * strTree) list) (trees: strTree list) = | |
| let last x = x |> List.rev |> List.hd in | |
| match trees with | |
| | [Tree (a, b, c)] when List.length acc = 0 -> [(1, Tree (a, b, stIfy 1 [] c))] | |
| | [Tree (a, b, c)] -> | |
| let (pointer, _) = last acc in | |
| acc @ [(pointer+1, Tree (a, b, stIfy pointer [] c))] | |
| | Tree (a, b, c) :: t when List.length acc = 0 -> treeList (acc @ [(1, Tree (a, b, stIfy 1 [] c))]) t | |
| | Tree (a, b, c) :: t -> | |
| let (pointer, _) = last acc in | |
| treeList (acc @ [(pointer+1, Tree (a, b, stIfy pointer [] c))]) t | |
| | _ -> acc;; | |
| let a1 = St 1 | |
| let a2 = Leaf "a" | |
| let a3 = Tree("a","b",[]) | |
| let a4 = Tree("a","b",[a1]) | |
| let a5 = Tree("a","b",[a1;a4]) | |
| let a6 = Tree("a","b",[a5;a4]) | |
| let a7 = Tree("a","b",[a6;a4;a5]);; | |
| let rec printTree = function | |
| | St x -> "St " ^ (string_of_int x) | |
| | Leaf x -> "Leaf " ^ x | |
| | Tree (a, b, c) -> "Tree (" ^ a ^ ", " ^ b ^ ", [" ^ (c |> List.map printTree |> String.concat ", ") ^ "])";; | |
| let rec printTreeList = function | |
| | [] -> "" | |
| | [(_, tree)] -> (printTree tree) | |
| | (_, tree) :: t -> (printTree tree) ^ ", " ^ (printTreeList t);; | |
| treeList [] (trees [] a6) | |
| |> printTreeList | |
| |> print_string;; |
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