Created
June 24, 2018 22:58
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| type_of(return(Values), _, [Arity]) :- length(Values, Arity). | |
| type_of(if(Then, Else), Env, T) :- | |
| type_of(Then, Env, T1), | |
| type_of(Else, Env, T2), | |
| union(T1, T2, T). | |
| type_of(fun([]), _, [] -> []). | |
| type_of(fun([Args->Body|Cdr]), Env, TArity->TBody) :- | |
| length(Args, TArityCar), | |
| type_of(Body, Env, TBodyCar), | |
| type_of(fun(Cdr), Env, TArityCdr->TBodyCdr), | |
| union([TArityCar], TArityCdr, TArity), | |
| union(TBodyCar, TBodyCdr, TBody). | |
| union2(S1, S2, U) :- | |
| is_list(S1), | |
| is_list(S2), | |
| union(S1, S2, U). | |
| union2(S1, (S2, Var), (U2, Var)) :- | |
| is_list(S1), | |
| is_list(S2), | |
| union(S1, S2, U1), | |
| lowpass(U1, Var, U2). | |
| union2((S1, Var), S2, X) :- | |
| is_list(S1), | |
| is_list(S2), | |
| union2(S2, (S1, Var), X). | |
| union2((S1, Var1), (S2, Var2), X) :- | |
| is_list(S1), | |
| is_list(S2), | |
| Var1 >= Var2, !, | |
| union2(S1, (S2, Var2), X). | |
| union2((S1, Var1), (S2, Var2), X) :- | |
| is_list(S1), | |
| is_list(S2), | |
| Var1 < Var2, | |
| union2(S2, (S1, Var1), X). | |
| lowpass([], _, []). | |
| lowpass([H|T], Cutoff, X) :- | |
| H >= Cutoff, | |
| lowpass(T, Var, X). | |
| lowpass([H|T], Cutoff, [H|L]) :- | |
| H < Cutoff, | |
| lowpass(T, Var1, L). |
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