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

Example 71 with Err

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

the class CompModule method rejectNameClash.

// ============================================================================================================================//
private static void rejectNameClash(final List<CompModule> modules) throws Err {
    // The Alloy language forbids two overlapping sigs from having fields
    // with the same name.
    // In other words: if 2 fields have the same name, then their type's
    // first column must not intersect.
    final Map<String, List<Field>> fieldname2fields = new LinkedHashMap<String, List<Field>>();
    for (CompModule m : modules) {
        for (Sig sig : m.sigs.values()) {
            for (Field field : sig.getFields()) {
                List<Field> peers = fieldname2fields.get(field.label);
                if (peers == null) {
                    peers = new ArrayList<Field>();
                    fieldname2fields.put(field.label, peers);
                }
                for (Field field2 : peers) if (field.type().firstColumnOverlaps(field2.type()))
                    throw new ErrorType(field.pos, "Two overlapping signatures cannot have\n" + "two fields with the same name \"" + field.label + "\":\n\n1) one is in sig \"" + field.sig + "\"\n" + field.pos + "\n\n2) the other is in sig \"" + field2.sig + "\"\n" + field2.pos);
                peers.add(field);
            }
        }
    }
}

Example 72 with Err

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

the class ScopeComputer method sig2scope.

/**
 * Sets the scope for a sig; returns true iff the sig's scope is changed by this
 * call.
 */
private void sig2scope(Sig sig, int newValue) throws Err {
    if (sig.builtin)
        throw new ErrorSyntax(cmd.pos, "Cannot specify a scope for the builtin signature \"" + sig + "\"");
    if (!(sig instanceof PrimSig))
        throw new ErrorSyntax(cmd.pos, "Cannot specify a scope for a subset signature \"" + sig + "\"");
    if (newValue < 0)
        throw new ErrorSyntax(cmd.pos, "Cannot specify a negative scope for sig \"" + sig + "\"");
    int old = sig2scope(sig);
    if (old == newValue)
        return;
    if (old >= 0)
        throw new ErrorSyntax(cmd.pos, "Sig \"" + sig + "\" already has a scope of " + old + ", so we cannot set it to be " + newValue);
    sig2scope.put((PrimSig) sig, newValue);
    rep.scope("Sig " + sig + " scope <= " + newValue + "\n");
}

Example 73 with Err

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

the class ScopeComputer method derive_scope_from_parent.

// ===========================================================================================================================//
/**
 * If A is not toplevel, and we haven't been able to derive its scope yet, then
 * give it its parent's scope.
 */
private boolean derive_scope_from_parent(Iterable<Sig> sigs) throws Err {
    boolean changed = false;
    Sig trouble = null;
    for (Sig s : sigs) if (!s.builtin && !s.isTopLevel() && sig2scope(s) < 0 && (s instanceof PrimSig)) {
        PrimSig p = ((PrimSig) s).parent;
        int pb = sig2scope(p);
        if (pb >= 0) {
            sig2scope(s, pb);
            changed = true;
        } else {
            trouble = s;
        }
    }
    if (changed)
        return true;
    if (trouble == null)
        return false;
    throw new ErrorSyntax(cmd.pos, "You must specify a scope for sig \"" + trouble + "\"");
}

Example 74 with Err

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

the class ScopeComputer method derive_overall_scope.

// ===========================================================================================================================//
/**
 * If A is toplevel, and we haven't been able to derive its scope yet, then let
 * it get the "overall" scope.
 */
private boolean derive_overall_scope(Iterable<Sig> sigs) throws Err {
    boolean changed = false;
    final int overall = (cmd.overall < 0 && cmd.scope.size() == 0) ? 3 : cmd.overall;
    for (Sig s : sigs) if (!s.builtin && s.isTopLevel() && sig2scope(s) < 0) {
        if (s.isEnum != null) {
            sig2scope(s, 0);
            continue;
        }
        // enum without children should get the empty set
        if (overall < 0)
            throw new ErrorSyntax(cmd.pos, "You must specify a scope for sig \"" + s + "\"");
        sig2scope(s, overall);
        changed = true;
    }
    return changed;
}

Example 75 with Err

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

the class TranslateAlloyToKodkod method execute_command.

/**
 * Based on the specified "options", execute one command and return the
 * resulting A4Solution object.
 *
 * @param rep - if nonnull, we'll send compilation diagnostic messages to it
 * @param sigs - the list of sigs; this list must be complete
 * @param cmd - the Command to execute
 * @param opt - the set of options guiding the execution of the command
 * @return null if the user chose "save to FILE" as the SAT solver, and nonnull
 *         if the solver finishes the entire solving and is either satisfiable
 *         or unsatisfiable.
 *         <p>
 *         If the return value X is satisfiable, you can call X.next() to get
 *         the next satisfying solution X2; and you can call X2.next() to get
 *         the next satisfying solution X3... until you get an unsatisfying
 *         solution.
 */
public static A4Solution execute_command(A4Reporter rep, Iterable<Sig> sigs, Command cmd, A4Options opt) throws Err {
    if (rep == null)
        rep = A4Reporter.NOP;
    TranslateAlloyToKodkod tr = null;
    try {
        if (cmd.parent != null || !cmd.getGrowableSigs().isEmpty())
            return execute_greedyCommand(rep, sigs, cmd, opt);
        tr = new TranslateAlloyToKodkod(rep, opt, sigs, cmd);
        tr.makeFacts(cmd.formula);
        return tr.frame.solve(rep, cmd, new Simplifier(), false);
    } catch (UnsatisfiedLinkError ex) {
        throw new ErrorFatal("The required JNI library cannot be found: " + ex.toString().trim(), ex);
    } catch (CapacityExceededException ex) {
        throw rethrow(ex);
    } catch (HigherOrderDeclException ex) {
        Pos p = tr != null ? tr.frame.kv2typepos(ex.decl().variable()).b : Pos.UNKNOWN;
        throw new ErrorType(p, "Analysis cannot be performed since it requires higher-order quantification that could not be skolemized.");
    } catch (Throwable ex) {
        if (ex instanceof Err)
            throw (Err) ex;
        else
            throw new ErrorFatal("Unknown exception occurred: " + ex, ex);
    }
}