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make core functions variadic

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Fabian 2021-03-28 16:40:08 +02:00 committed by Joel Martin
parent 058c6dd98f
commit c635bcff4d
1 changed files with 23 additions and 15 deletions
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38
impls/sml/core.sml
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@ -27,27 +27,35 @@ val coreIo = [
| _ => raise NotApplicable "'prn' requires one argument")
]
fun intFun n f r [INT a, INT b] = r (f (a, b))
| intFun n _ _ _ = raise NotApplicable ("'" ^ n ^ "' requires two integer arguments")
fun arithFolder n f (INT next, INT prev) = INT (f (prev, next))
| arithFolder n _ _ = raise NotApplicable ("'" ^ n ^ "' requires integer arguments")
fun cmpFolder n c (INT next, (INT prev, acc)) = (INT next, acc andalso (c (prev, next)))
| cmpFolder n _ _ = raise NotApplicable ("'" ^ n ^ "' requires integer arguments")
fun cmpFold n c (x::xs) = foldl (cmpFolder n c) (x, true) xs |> #2 |> BOOL
| cmpFold n _ _ = raise NotApplicable ("'" ^ n ^ "' requires arguments")
fun eqFolder (next, (prev, acc)) = (next, acc andalso (malEq (next, prev)))
(* TODO: variadic versions? *)
val coreCmp = [
SYMBOL "=",
FN (fn [a, b] => BOOL (malEq (a, b))
| _ => raise NotApplicable "'=' requires two arguments"),
SYMBOL "=",
FN (fn (x::xs) => foldl eqFolder (x, true) xs |> #2 |> BOOL
| _ => raise NotApplicable "'=' requires arguments"),
SYMBOL "<", FN (intFun "<" (op <) BOOL),
SYMBOL "<=", FN (intFun "<=" (op <=) BOOL),
SYMBOL ">=", FN (intFun ">=" (op >=) BOOL),
SYMBOL ">", FN (intFun ">" (op >) BOOL)
SYMBOL "<", FN (cmpFold "<" (op <)),
SYMBOL "<=", FN (cmpFold "<=" (op <=)),
SYMBOL ">=", FN (cmpFold ">=" (op >=)),
SYMBOL ">", FN (cmpFold ">" (op >))
]
(* TODO: variadic versions? *)
val coreMath = [
SYMBOL "+", FN (intFun "+" (op +) INT),
SYMBOL "*", FN (intFun "*" (op * ) INT), (* mosml can't parse*)
SYMBOL "-", FN (intFun "-" (op -) INT),
SYMBOL "/", FN (intFun "/" (op div) INT)
SYMBOL "+", FN (fn args => foldl (arithFolder "+" (op +)) (INT 0) args),
SYMBOL "*", FN (fn args => foldl (arithFolder "*" (op * )) (INT 1) args),
SYMBOL "/", FN (fn (x::xs) => foldl (arithFolder "/" (op div)) x xs
| _ => raise NotApplicable "'/' requires arguments"),
SYMBOL "-", FN (fn (x::xs) => foldl (arithFolder "-" (op -)) x xs
| _ => raise NotApplicable "'-' requires arguments")
]
val coreNs = List.concat [