44 lines
1.0 KiB
OCaml
44 lines
1.0 KiB
OCaml
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(* This file implements native functions of the VM runtime.
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Stuff like printing to the screen, file I/O etc will be implemented
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here.
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*)
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open Types
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type numeric_val =
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| NInt of int
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| NDouble of float
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let to_numeric = function
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| Int x -> NInt x
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| Double x -> NDouble x
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| v -> failwith ((print_value v) ^ " is not a numeric value")
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let of_numeric = function
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| NInt x -> Int x
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| NDouble x -> Double x
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let numeric_add = function
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| NInt x -> (function
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| NInt y -> NInt (x+y)
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| NDouble y -> NDouble ((float_of_int x) +. y))
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| NDouble x -> (function
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| NInt y -> NDouble (x+.(float_of_int y))
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| NDouble y -> NDouble (x+.y))
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let builtin_print (v : Types.value ref list) =
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List.iter (fun r -> print_endline (print_value !r)) v;
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Types.Nil
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let builtin_add (vs : Types.value ref list) =
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of_numeric (List.fold_left numeric_add (NInt 0) (List.map (fun r -> to_numeric !r) vs))
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let table = [|
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builtin_print;
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builtin_add
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|]
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