Exemple #1
0
 /** {@inheritDoc} */
 @Override
 public List<? extends Browsable> getSubnodes() {
   if (args.size() == 0) {
     Expr b = fun.getBody();
     return Util.asList(make(b.pos(), b.span(), b.getHTML(), b.getSubnodes()));
   }
   Pos p = pos;
   if (p == Pos.UNKNOWN) p = span();
   Browsable f =
       make(p, p, (fun.isPred ? "<b>pred</b> " : "<b>fun</b> ") + fun.label, fun.getSubnodes());
   Browsable a =
       make(
           span(),
           span(),
           "<b>" + args.size() + " argument" + (args.size() == 1 ? "</b>" : "s</b>"),
           args);
   return Util.asList(f, a);
 }
  public static void main(String[] args) throws Err {

    // Chooses the Alloy4 options
    A4Options opt = new A4Options();
    opt.solver = A4Options.SatSolver.SAT4J;

    // abstract sig A {}
    PrimSig A = new PrimSig("A", Attr.ABSTRACT);

    // sig B {}
    PrimSig B = new PrimSig("B");

    // one sig A1 extends A {}
    PrimSig A1 = new PrimSig("A1", A, Attr.ONE);

    // one sig A2 extends A {}
    PrimSig A2 = new PrimSig("A2", A, Attr.ONE);

    // A { f: B lone->lone B }
    Expr f = A.addField("f", B.lone_arrow_lone(B));
    // Since (B lone->lone B) is not unary,  the default is "setOf",  meaning "f:set (B lone->lone
    // B)"

    // A { g: B }
    Expr g = A.addField("g", B);
    // The line above is the same as:   A.addField(null, "g", B.oneOf())  since B is unary.
    // If you want "setOf", you need:   A.addField(null, "g", B.setOf())

    // pred someG { some g }
    Func someG = new Func(null, "SomeG", null, null, g.some());

    // pred atMostThree[x:univ, y:univ] { #(x+y) >= 3 }
    Decl x = UNIV.oneOf("x");
    Decl y = UNIV.oneOf("y");
    Expr body = x.get().plus(y.get()).cardinality().lte(ExprConstant.makeNUMBER(3));
    Func atMost3 = new Func(null, "atMost3", Util.asList(x, y), null, body);

    List<Sig> sigs = Arrays.asList(new Sig[] {A, B, A1, A2});

    // run { some A && atMostThree[B,B] } for 3 but 3 int, 3 seq
    Expr expr1 = A.some().and(atMost3.call(B, B));
    Command cmd1 = new Command(false, 3, 3, 3, expr1);
    A4Solution sol1 = TranslateAlloyToKodkod.execute_command(NOP, sigs, cmd1, opt);
    System.out.println("[Solution1]:");
    System.out.println(sol1.toString());

    // run { some f && SomeG[] } for 3 but 2 int, 1 seq, 5 A, exactly 6 B
    Expr expr2 = f.some().and(someG.call());
    Command cmd2 = new Command(false, 3, 2, 1, expr2);
    cmd2 = cmd2.change(A, false, 5);
    cmd2 = cmd2.change(B, true, 6);
    A4Solution sol2 = TranslateAlloyToKodkod.execute_command(NOP, sigs, cmd2, opt);
    System.out.println("[Solution2]:");
    System.out.println(sol2.toString());
  }