Examples of edu.mit.csail.sdg.alloy4.OurConsole

edu.mit.csail.sdg.alloy4.ErrorFatal
Graphical input/output prompt.
This class's constructor takes a Computer object, then constructs a JScrollPane in which the user can type commands, and the output from the Computer object will be displayed. Empty input lines are ignored. This interactive prompt supports UP and DOWN arrow command histories and basic copy/cut/paste editing.
For each user input, if the Computer object returns a String, it is displayed in blue. But if the Computer object throws an exception, the exception will be displayed in red.
Thread Safety: Can be called only by the AWT event thread.

       TupleSet oldL = bounds.lowerBound(relation);
       TupleSet oldU = bounds.upperBound(relation);
       if (oldU.containsAll(upperBound) && upperBound.containsAll(lowerBound) && lowerBound.containsAll(oldL)) {
          bounds.bound(relation, lowerBound, upperBound);
       } else {
          throw new ErrorAPI("Inconsistent bounds shrinking on relation: "+relation);
       }
    }

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    /** If this solution is solved and satisfiable, evaluates the given expression and returns an A4TupleSet, a java Integer, or a java Boolean. */
    public Object eval(Expr expr) throws Err {
        try {
           if (expr instanceof Sig) return eval((Sig)expr);
           if (expr instanceof Field) return eval((Field)expr);
           if (!solved) throw new ErrorAPI("This solution is not yet solved, so eval() is not allowed.");
           if (eval==null) throw new ErrorAPI("This solution is unsatisfiable, so eval() is not allowed.");
           if (expr.ambiguous && !expr.errors.isEmpty()) expr = expr.resolve(expr.type(), null);
           if (!expr.errors.isEmpty()) throw expr.errors.pick();
           Object result = TranslateAlloyToKodkod.alloy2kodkod(this, expr);
           if (result instanceof IntExpression) return eval.evaluate((IntExpression)result);
           if (result instanceof Formula) return eval.evaluate((Formula)result);

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        }
    }


    /** Returns the Kodkod instance represented by this solution; throws an exception if the problem is not yet solved or if it is unsatisfiable. */
    public Instance debugExtractKInstance() throws Err {
        if (!solved) throw new ErrorAPI("This solution is not yet solved, so instance() is not allowed.");
        if (eval==null) throw new ErrorAPI("This solution is unsatisfiable, so instance() is not allowed.");
        return eval.instance().unmodifiableView();
    }

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        }
    };


    /** Converts an A4TupleSet into a SimTupleset object. */
    private static SimTupleset convert(Object object) throws Err {
        if (!(object instanceof A4TupleSet)) throw new ErrorFatal("Unexpected type error: expecting an A4TupleSet.");
        A4TupleSet s = (A4TupleSet)object;
        if (s.size()==0) return SimTupleset.EMPTY;
        List<SimTuple> list = new ArrayList<SimTuple>(s.size());
        int arity = s.arity();
        for(A4Tuple t: s) {

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     */
    public boolean cform(Expr x) throws Err {
        if (!x.errors.isEmpty()) throw x.errors.pick();
        Object y = visitThis(x);
        if (y instanceof Boolean) return Boolean.TRUE.equals(y);
        throw new ErrorFatal(x.span(), "This should have been a formula.\nInstead it is "+y);
    }

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     */
    public int cint(Expr x) throws Err {
        if (!x.errors.isEmpty()) throw x.errors.pick();
        Object y = visitThis(x);
        if (y instanceof Integer) return trunc((Integer)y);
        throw new ErrorFatal(x.span(), "This should have been an integer expression.\nInstead it is "+y);
    }

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     */
    public SimTupleset cset(Expr x) throws Err {
        if (!x.errors.isEmpty()) throw x.errors.pick();
        Object y = visitThis(x);
        if (y instanceof SimTupleset) return (SimTupleset)y;
        throw new ErrorFatal(x.span(), "This should have been a set or a relation.\nInstead it is "+y);
    }

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          case DIV:
              { int p=cint(x.left), q=cint(x.right), r=(p==0 ? 0 : (q==0 ? (p<0 ? 1 : -1) : (p/q))); return trunc(r); }
          case REM:
              { int p=cint(x.left), q=cint(x.right), r=(p==0 ? 0 : (q==0 ? (p<0 ? 1 : -1) : (p/q))); return trunc(p-r*q); }
        }
        throw new ErrorFatal(x.pos, "Unsupported operator ("+x.op+") encountered during ExprBinary.accept()");
    }

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          case EMPTYNESS: return SimTupleset.EMPTY;
          case STRING: return SimTupleset.make(x.string);
          case NEXT: return SimTupleset.makenext(min, max);
          case IDEN: return cset(Sig.UNIV).iden();
        }
        throw new ErrorFatal(x.pos, "Unsupported operator ("+x.op+") encountered during ExprConstant.accept()");
    }

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          case CAST2INT:    return trunc(cset(x.sub).sum());
          case CLOSURE:     return cset(x.sub).closure();
          case RCLOSURE:    return cset(x.sub).closure().union(cset(ExprConstant.IDEN));
          case TRANSPOSE:   return cset(x.sub).transpose();
        }
        throw new ErrorFatal(x.pos, "Unsupported operator ("+x.op+") encountered during ExprUnary.accept()");
    }

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