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Overhaul of type annotations for generated OCaml code. Printing beta-…
…redexes as `match-with` expressions. Some cleanup of logging code.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,35 @@ | ||
| type num = int | ||
| type _ place = | ||
| | LocA : a place | ||
| | LocB : b place | ||
| and a | ||
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| and b | ||
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| type (_, | ||
| _) nearby = | ||
| | Here : (*∀'b.*)'b place * 'b place -> ('b, 'b) nearby | ||
| | Transitive : (*∀'a, 'b, 'c.*)('a, 'b) nearby * ('b, 'c) nearby -> | ||
| ('a, 'c) nearby | ||
| type boolean = | ||
| | True : boolean | ||
| | False : boolean | ||
| let assert_boolean b = assert (b = True) | ||
| external is_nearby : (('a, 'b) nearby -> boolean) = "is_nearby" | ||
| type _ ex1 = | ||
| | Ex1 : (*∀'a, 'b.*)('b place * ('a, 'b) nearby) -> 'a ex1 | ||
| external wander : ('a place -> 'a ex1) = "wander" | ||
| type (_, | ||
| _) meet = | ||
| | Same : (*∀'b.*) ('b, 'b) meet | ||
| | NotSame : (*∀'a, 'b.*) ('a, 'b) meet | ||
| external compare : ('a place -> 'b place -> ('a, 'b) meet) = "compare" | ||
| let rec walk : type a b . (a place -> b place -> (a, b) nearby) = | ||
| (fun x goal -> | ||
| ((match (compare x goal: (a, b) meet) with | ||
| Same -> Here (x, goal) | ||
| | NotSame -> | ||
| let Ex1 ((y, to_y)) = wander x in Transitive (to_y, walk y goal)) : | ||
| (a, b) nearby)) | ||
| let () = assert_boolean (is_nearby (walk LocA LocB)); () | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,24 @@ | ||
| type num = int | ||
| type _ term = | ||
| | Lit : integer -> integer term | ||
| | Plus : integer term * integer term -> integer term | ||
| | IsZero : integer term -> boolean term | ||
| | If : (*∀'a.*)boolean term * 'a term * 'a term -> 'a term | ||
| | Pair : (*∀'a, 'b.*)'a term * 'b term -> (('a * 'b)) term | ||
| | Fst : (*∀'a, 'b.*)(('a * 'b)) term -> 'a term | ||
| | Snd : (*∀'a, 'b.*)(('a * 'b)) term -> 'b term | ||
| and integer | ||
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| and boolean | ||
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| external plus : (integer -> integer -> integer) = "plus" | ||
| external is_zero : (integer -> boolean) = "is_zero" | ||
| external if_then : (boolean -> 'a -> 'a -> 'a) = "if_then" | ||
| let rec eval : type a . (a term -> a) = | ||
| ((function Lit i -> i | IsZero x -> is_zero (eval x) | ||
| | Plus (x, y) -> plus (eval x) (eval y) | ||
| | If (b, t, e) -> if_then (eval b) (eval t) (eval e) | ||
| | Pair (x, y) -> (eval x, eval y) | ||
| | Fst p -> let ((x, y): (a * 't47)) = eval p in x | ||
| | Snd p -> let ((x, y): ('t59 * a)) = eval p in y): a term -> a) | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,18 @@ | ||
| type num = int | ||
| type _ term = | ||
| | Lit : integer -> integer term | ||
| | Plus : integer term * integer term -> integer term | ||
| | IsZero : integer term -> boolean term | ||
| | If : (*∀'a.*)boolean term * 'a term * 'a term -> 'a term | ||
| and integer | ||
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| and boolean | ||
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| external plus : (integer -> integer -> integer) = "plus" | ||
| external is_zero : (integer -> boolean) = "is_zero" | ||
| external if_then : (boolean -> 'a -> 'a -> 'a) = "if_then" | ||
| let rec eval : type a . (a term -> a) = | ||
| ((function Lit i -> i | IsZero x -> is_zero (eval x) | ||
| | Plus (x, y) -> plus (eval x) (eval y) | ||
| | If (b, t, e) -> if_then (eval b) (eval t) (eval e)): a term -> a) | ||
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