Created
August 20, 2011 12:18
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CoPL problem 77
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|- let rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x) in | |
apply ((fun x -> x * x) :: (fun y -> y + 3) :: []) 4 | |
evalto 19 | |
by E-LetRec { | |
apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)] |- | |
apply ((fun x -> x * x) :: (fun y -> y + 3) :: []) 4 | |
evalto 19 | |
by E-App { | |
apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)] |- | |
apply ((fun x -> x * x) :: (fun y -> y + 3) :: []) | |
evalto (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)], | |
l = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun x -> x * x] :: (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3] :: [])[ | |
fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)] | |
by E-AppRec { | |
apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)] |- | |
apply evalto ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)] | |
by E-Var {}; | |
apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)] |- | |
((fun x -> x * x) :: (fun y -> y + 3) :: []) | |
evalto (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun x -> x * x] :: (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3] :: [] | |
by E-Cons { | |
apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)] |- | |
fun x -> x * x | |
evalto (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun x -> x * x] | |
by E-Fun {}; | |
apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)] |- | |
(fun y -> y + 3) :: [] | |
evalto (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3] :: [] | |
by E-Cons { | |
apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)] |- | |
fun y -> y + 3 | |
evalto (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3] | |
by E-Fun {}; | |
apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)] |- | |
[] evalto [] by E-Nil {} | |
} | |
}; | |
apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)], | |
l = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun x -> x * x] :: (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3] :: [] |- | |
fun x -> | |
match l with [] -> x | f :: l -> apply l (f x) | |
evalto (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)], | |
l = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun x -> x * x] :: (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3] :: [])[ | |
fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)] | |
by E-Fun {} | |
}; | |
apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)] |- | |
4 evalto 4 by E-Int {}; | |
apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)], | |
l = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun x -> x * x] :: (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3] :: [], | |
x = 4 |- | |
match l with [] -> x | f :: l -> apply l (f x) | |
evalto 19 | |
by E-MatchCons { | |
apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)], | |
l = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun x -> x * x] :: (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3] :: [], | |
x = 4 |- | |
l evalto (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun x -> x * x] :: (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3] :: [] | |
by E-Var {}; | |
// ? | |
apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)], | |
l = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun x -> x * x] :: (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3] :: [], | |
x = 4, | |
f = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun x -> x * x], | |
l = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3] :: [] |- | |
apply l (f x) evalto 19 | |
by E-App { | |
apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)], | |
l = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun x -> x * x] :: (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3] :: [], | |
x = 4, | |
f = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun x -> x * x], | |
l = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3] :: [] |- | |
apply l | |
evalto (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)], | |
l = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3] :: [] )[ | |
fun x -> | |
match l with [] -> x | f :: l -> apply l (f x) ] | |
by E-AppRec { | |
apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)], | |
l = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun x -> x * x] :: (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3] :: [], | |
x = 4, | |
f = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun x -> x * x], | |
l = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3] :: [] |- | |
apply evalto ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)] | |
by E-Var {}; | |
apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)], | |
l = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun x -> x * x] :: (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3] :: [], | |
x = 4, | |
f = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun x -> x * x], | |
l = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3] :: [] |- | |
l evalto (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3] :: [] | |
by E-Var {}; | |
apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)], | |
l = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3] :: [] |- | |
fun x -> | |
match l with [] -> x | f :: l -> apply l (f x) | |
evalto (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)], | |
l = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3] :: [] )[ | |
fun x -> | |
match l with [] -> x | f :: l -> apply l (f x) ] | |
by E-Fun {} | |
}; | |
apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)], | |
l = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun x -> x * x] :: (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3] :: [], | |
x = 4, | |
f = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun x -> x * x], | |
l = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3] :: [] |- | |
f x evalto 16 | |
by E-App { | |
apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)], | |
l = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun x -> x * x] :: (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3] :: [], | |
x = 4, | |
f = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun x -> x * x], | |
l = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3] :: [] |- | |
f evalto (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun x -> x * x] | |
by E-Var {}; | |
apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)], | |
l = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun x -> x * x] :: (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3] :: [], | |
x = 4, | |
f = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun x -> x * x], | |
l = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3] :: [] |- | |
x evalto 4 by E-Var {}; | |
apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)], | |
x = 4 |- | |
x * x evalto 16 | |
by E-Times { | |
apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)], | |
x = 4 |- | |
x evalto 4 by E-Var {}; | |
apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)], | |
x = 4 |- | |
x evalto 4 by E-Var {}; | |
4 times 4 is 16 by B-Times {} | |
} | |
}; | |
apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)], | |
l = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3] :: [], | |
x = 16 |- | |
match l with [] -> x | f :: l -> apply l (f x) | |
evalto 19 | |
by E-MatchCons { | |
apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)], | |
l = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3] :: [], | |
x = 16 |- | |
l evalto (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3] :: [] | |
by E-Var {}; | |
apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)], | |
l = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3] :: [], | |
x = 16, | |
f = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3], | |
l = [] |- | |
((apply l) (f x)) | |
evalto 19 | |
by E-App { | |
apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)], | |
l = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3] :: [], | |
x = 16, | |
f = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3], | |
l = [] |- | |
apply l | |
evalto (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)], | |
l = [])[ | |
fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)] | |
by E-AppRec { | |
apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)], | |
l = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3] :: [], | |
x = 16, | |
f = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3], | |
l = [] |- | |
apply evalto ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)] | |
by E-Var {}; | |
apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)], | |
l = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3] :: [], | |
x = 16, | |
f = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3], | |
l = [] |- | |
l evalto [] | |
by E-Var {}; | |
apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)], | |
l = [] |- | |
fun x -> | |
match l with [] -> x | f :: l -> apply l (f x) | |
evalto (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)], | |
l = [])[ | |
fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)] | |
by E-Fun {} | |
}; | |
apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)], | |
l = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3] :: [], | |
x = 16, | |
f = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3], | |
l = [] |- | |
f x evalto 19 | |
by E-App { | |
apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)], | |
l = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3] :: [], | |
x = 16, | |
f = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3], | |
l = [] |- | |
f evalto (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3] | |
by E-Var {}; | |
apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)], | |
l = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3] :: [], | |
x = 16, | |
f = (apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)])[ | |
fun y -> y + 3], | |
l = [] |- | |
x evalto 16 | |
by E-Var {}; | |
apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)], | |
y = 16 |- | |
y + 3 evalto 19 | |
by E-Plus { | |
apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)], | |
y = 16 |- | |
y evalto 16 | |
by E-Var {}; | |
apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)], | |
y = 16 |- | |
3 evalto 3 | |
by E-Int {}; | |
16 plus 3 is 19 by B-Plus {} | |
} | |
}; | |
apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)], | |
l = [], | |
x = 19 |- | |
match l with [] -> x | f :: l -> apply l (f x) | |
evalto 19 | |
by E-MatchNil { | |
apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)], | |
l = [], | |
x = 19 |- | |
l evalto [] | |
by E-Var {}; | |
apply = ()[rec apply = fun l -> fun x -> | |
match l with [] -> x | f :: l -> apply l (f x)], | |
l = [], | |
x = 19 |- | |
x evalto 19 | |
by E-Var {} | |
} | |
} | |
} | |
} | |
} | |
} | |
} |
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