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August 7, 2021 17:27
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Prolog で Lisp
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% Welcome to SWI-Prolog (threaded, 64 bits, version 8.3.28) | |
% 参考: https://qiita.com/sym_num/items/955f47de4494f4c57ba8 | |
% 実行: | |
% > prolog | |
% ?- ['./prolog_lisp.pl']. | |
% ?- repl. | |
% :- use_module(library(history)). | |
%Lisp in Prolog | |
repl3 :- | |
read_term_with_history( | |
X, | |
[ %show(h), | |
%help('!h'), | |
%no_save([trace, end_of_file]), | |
prompt('|: ') | |
%variable_names(Bindings) | |
]), | |
eval(X,Y,[]), | |
write(Y), nl, | |
X = [quit] -> fail; repl3. | |
repl2 :- | |
%write('> '), | |
read(X), | |
eval(X,Y,[]), | |
write(Y), nl, | |
X = [quit] -> fail; repl2. | |
repl :- | |
repeat, | |
write('> '), | |
read(X), | |
eval(X,Y,[]), | |
write(Y),nl, | |
(X=[quit]->true;fail), !. | |
yes_or_no(X) :- | |
repeat, write('yes or no >'), read(X), (X == yes ; X == no), !. | |
eval(X,X,__E) :- | |
integer(X). | |
eval(X,X,__E) :- | |
float(X). | |
eval(X,Y,E) :- | |
atom(X), | |
assoc(X,E,Y). | |
eval(X,Y,__E) :- | |
atom(X), | |
global(X,Y). | |
eval([quit],t,__E). | |
eval([defun,F,A,B],t,__E) :- | |
assert(fun(F,A,B)). | |
eval([setq,X,Y],t,E) :- | |
eval(Y,Z,E), | |
assert(global(X,Z)). | |
eval(X,Y,E) :- | |
funcall(X,Y,E). | |
eval([reset],t,__E) :- | |
retractall(global(_, _)), assert(global(t,t)), assert(global(nil,nil)). | |
funcall([F|A1],Z,E) :- | |
fun(F,A,B), | |
argument(A,A1,Y), | |
append(Y,E,E1), | |
eval(B,Z,E1). | |
funcall([+,X,Y],Z,E) :- | |
eval(X,X1,E), | |
eval(Y,Y1,E), | |
Z is X1+Y1. | |
funcall([-,X,Y],Z,E) :- | |
eval(X,X1,E), | |
eval(Y,Y1,E), | |
Z is X1-Y1. | |
funcall([*,X,Y],Z,E) :- | |
eval(X,X1,E), | |
eval(Y,Y1,E), | |
Z is X1*Y1. | |
funcall([/,X,Y],Z,E) :- | |
eval(X,X1,E), | |
eval(Y,Y1,E), | |
Z is X1/Y1. | |
assoc(__,[],__Z) :- fail. | |
assoc(X,[[X|Y]|__Ys],Y). | |
assoc(X,[_|Ys],Z) :- | |
assoc(X,Ys,Z). | |
argument([X],[Y],[X|Y]). | |
argument([X|Xs],[Y|Ys],[[X|Y],Z]) :- | |
argument(Xs,Ys,Z). | |
:- dynamic(global/2). | |
global(t,t). | |
global(nil,nil). | |
:- dynamic(fun/3). | |
fun(dummy,a,b). | |
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