Examples with Err edu.mit.csail.sdg.alloy4.Err used on opensource projects

Example 61 with Err

use of edu.mit.csail.sdg.alloy4.Err in project org.alloytools.alloy by AlloyTools.

the class SimInstance method init.

/**
 * Initializes the given field to be associated with the given unary value;
 * should only be called at the beginning.
 * <p>
 * The resulting instance may or may not satisfy all facts, and should be
 * checked for consistency.
 */
public void init(Field field, SimTupleset value) throws Err {
    if (value == null) {
        sfs.remove(field);
        return;
    }
    if (!value.empty() && value.arity() != field.type().arity())
        throw new ErrorType("Evaluator encountered an error: field " + field.label + " arity must not be " + value.arity());
    if (field.defined)
        throw new ErrorAPI("Evaluator cannot prebind the value of a defined field.");
    sfs.put(field, value);
    cacheUNIV = null;
    cacheSTRING = null;
    cacheForConstants.clear();
}

Example 62 with Err

use of edu.mit.csail.sdg.alloy4.Err in project org.alloytools.alloy by AlloyTools.

the class A4Solution method eval.

/**
 * Return the A4TupleSet for the given field (if solution not yet solved, or
 * unsatisfiable, or field not found, then return an empty tupleset)
 */
public A4TupleSet eval(Field field) {
    try {
        if (!solved || eval == null)
            return new A4TupleSet(factory.noneOf(field.type().arity()), this);
        A4TupleSet ans = evalCache.get(field);
        if (ans != null)
            return ans;
        TupleSet ts = eval.evaluate((Expression) TranslateAlloyToKodkod.alloy2kodkod(this, field));
        ans = new A4TupleSet(ts, this);
        evalCache.put(field, ans);
        return ans;
    } catch (Err er) {
        return new A4TupleSet(factory.noneOf(field.type().arity()), this);
    }
}

Example 63 with Err

use of edu.mit.csail.sdg.alloy4.Err in project org.alloytools.alloy by AlloyTools.

the class A4Solution method toString.

/**
 * Dumps the Kodkod solution into String.
 */
@Override
public String toString() {
    if (!solved)
        return "---OUTCOME---\nUnknown.\n";
    if (eval == null)
        return "---OUTCOME---\nUnsatisfiable.\n";
    String answer = toStringCache;
    if (answer != null)
        return answer;
    Instance sol = eval.instance();
    StringBuilder sb = new StringBuilder();
    sb.append("---INSTANCE---\n" + "integers={");
    boolean firstTuple = true;
    for (IndexedEntry<TupleSet> e : sol.intTuples()) {
        if (firstTuple)
            firstTuple = false;
        else
            sb.append(", ");
        // No need to print e.index() since we've ensured the Int atom's
        // String representation is always equal to ""+e.index()
        Object atom = e.value().iterator().next().atom(0);
        sb.append(atom2name(atom));
    }
    sb.append("}\n");
    try {
        for (Sig s : sigs) {
            sb.append(s.label).append("=").append(eval(s)).append("\n");
            for (Field f : s.getFields()) sb.append(s.label).append("<:").append(f.label).append("=").append(eval(f)).append("\n");
        }
        for (ExprVar v : skolems) {
            sb.append("skolem ").append(v.label).append("=").append(eval(v)).append("\n");
        }
        return toStringCache = sb.toString();
    } catch (Err er) {
        return toStringCache = ("<Evaluator error occurred: " + er + ">");
    }
}

Example 64 with Err

use of edu.mit.csail.sdg.alloy4.Err in project org.alloytools.alloy by AlloyTools.

the class A4Solution method eval.

/**
 * Return the A4TupleSet for the given sig (if solution not yet solved, or
 * unsatisfiable, or sig not found, then return an empty tupleset)
 */
public A4TupleSet eval(Sig sig) {
    try {
        if (!solved || eval == null)
            return new A4TupleSet(factory.noneOf(1), this);
        A4TupleSet ans = evalCache.get(sig);
        if (ans != null)
            return ans;
        TupleSet ts = eval.evaluate((Expression) TranslateAlloyToKodkod.alloy2kodkod(this, sig));
        ans = new A4TupleSet(ts, this);
        evalCache.put(sig, ans);
        return ans;
    } catch (Err er) {
        return new A4TupleSet(factory.noneOf(1), this);
    }
}

Example 65 with Err

use of edu.mit.csail.sdg.alloy4.Err in project org.alloytools.alloy by AlloyTools.

the class A4SolutionWriter method writeExpr.

/**
 * Write the given Expr and its Type.
 */
private boolean writeExpr(String prefix, Expr expr) throws Err {
    Type type = expr.type();
    if (!type.hasTuple())
        return false;
    if (sol != null) {
        // Check to see if the tupleset is *really* fully contained inside
        // "type".
        // If not, then grow "type" until the tupleset is fully contained
        // inside "type"
        Expr sum = type.toExpr();
        int lastSize = (-1);
        while (true) {
            A4TupleSet ts = (A4TupleSet) (sol.eval(expr.minus(sum)));
            int n = ts.size();
            if (n <= 0)
                break;
            if (lastSize > 0 && lastSize <= n)
                throw new ErrorFatal("An internal error occurred in the evaluator.");
            lastSize = n;
            Type extra = ts.iterator().next().type();
            type = type.merge(extra);
            sum = sum.plus(extra.toExpr());
        }
        // Now, write out the tupleset
        A4TupleSet ts = (A4TupleSet) (sol.eval(expr));
        for (A4Tuple t : ts) {
            if (prefix.length() > 0) {
                out.print(prefix);
                prefix = "";
            }
            out.print("   <tuple>");
            for (int i = 0; i < t.arity(); i++) Util.encodeXMLs(out, " <atom label=\"", t.atom(i), "\"/>");
            out.print(" </tuple>\n");
        }
    }
    // Now, write out the type
    if (prefix.length() > 0)
        return false;
    for (List<PrimSig> ps : type.fold()) {
        out.print("   <types>");
        for (PrimSig sig : ps) Util.encodeXMLs(out, " <type ID=\"", map(sig), "\"/>");
        out.print(" </types>\n");
    }
    return true;
}