Examples with Sig edu.mit.csail.sdg.ast.Sig used on opensource projects

Example 26 with Sig

use of edu.mit.csail.sdg.ast.Sig in project org.alloytools.alloy by AlloyTools.

the class CompModule method resolveParams.

/**
 * Every param in every module will now point to a nonnull Sig.
 */
private static void resolveParams(A4Reporter rep, List<CompModule> modules) throws Err {
    while (true) {
        boolean chg = false;
        Open missing = null;
        String missingName = "";
        for (CompModule mod : modules) for (Open open : mod.opens.values()) {
            CompModule sub = open.realModule;
            if (open.args.size() != sub.params.size())
                throw new ErrorSyntax(open.pos, "You supplied " + open.args.size() + " arguments to the open statement, but the imported module requires " + sub.params.size() + " arguments.");
            int i = 0;
            for (Map.Entry<String, Sig> p : sub.params.entrySet()) {
                Sig old = p.getValue();
                String kn = p.getKey(), vn = open.args.get(i);
                i++;
                Sig vv = mod.getRawSIG(open.pos, vn);
                if (vv == null) {
                    if (old == null) {
                        missing = open;
                        missingName = vn;
                    }
                    continue;
                }
                if (old == vv)
                    continue;
                if (old != null)
                    throw new ErrorFatal(open.pos, "Internal error (module re-instantiated with different arguments)");
                if (vv == NONE)
                    throw new ErrorSyntax(open.pos, "You cannot use \"none\" as an instantiating argument.");
                chg = true;
                p.setValue(vv);
                rep.parse("RESOLVE: " + (sub.path.length() == 0 ? "this/" : sub.path) + "/" + kn + " := " + vv + "\n");
            }
        }
        if (!chg && missing == null)
            return;
        if (!chg)
            throw new ErrorSyntax(missing.pos, "The signature name \"" + missingName + "\" cannot be found.");
    }
}

Example 27 with Sig

use of edu.mit.csail.sdg.ast.Sig in project org.alloytools.alloy by AlloyTools.

the class CompModule method unique.

/**
 * Throw an exception if there are more than 1 match; return nonnull if only one
 * match; return null if no match.
 */
private Object unique(Pos pos, String name, List<Object> objs) throws Err {
    if (objs.size() == 0)
        return null;
    if (objs.size() == 1)
        return objs.get(0);
    StringBuilder msg = new StringBuilder("The name \"").append(name);
    msg.append("\" is ambiguous.\n" + "There are ").append(objs.size()).append(" choices:");
    for (int i = 0; i < objs.size(); i++) {
        msg.append("\n\n#").append(i + 1).append(": ");
        Object x = objs.get(i);
        if (x instanceof Sig) {
            Sig y = (Sig) x;
            msg.append("sig ").append(y.label).append("\n" + "at ").append(y.pos.toShortString());
        } else if (x instanceof Func) {
            Func y = (Func) x;
            msg.append(y.isPred ? "pred " : "fun ").append(y.label).append("\n" + "at ").append(y.pos.toShortString());
        } else if (x instanceof Expr) {
            Expr y = (Expr) x;
            msg.append("assertion at ").append(y.pos.toShortString());
        }
    }
    throw new ErrorSyntax(pos, msg.toString());
}

Example 28 with Sig

use of edu.mit.csail.sdg.ast.Sig in project org.alloytools.alloy by AlloyTools.

the class SimInstance method read.

/**
 * Construct a new simulation context by reading the given file.
 */
public static synchronized SimInstance read(Module root, String filename, List<ExprVar> vars) throws Err, IOException {
    FileInputStream fis = null;
    BufferedInputStream bis = null;
    try {
        fis = new FileInputStream(filename);
        bis = new BufferedInputStream(fis);
        // read maxseq
        if (!readkey(bis).equals("maxseq"))
            throw new IOException("Expecting maxseq = ...");
        int maxseq = readNonNegativeIntThenLinebreak(bis);
        // read bitwidth
        if (!readkey(bis).equals("bitwidth"))
            throw new IOException("Expecting bitwidth = ...");
        int bitwidth = readNonNegativeIntThenLinebreak(bis);
        // construct the SimInstance object with no atoms and no relations
        SimInstance ans = new SimInstance(root, bitwidth, maxseq);
        // parse all the relations
        Map<String, SimTupleset> sfs = new HashMap<String, SimTupleset>();
        while (true) {
            String key = readkey(bis);
            if (key.length() == 0)
                // we don't expect any more data after this
                break;
            sfs.put(key, SimTupleset.read(bis));
        }
        // assign its value in the new SimInstance's sfs map
        for (final Sig s : root.getAllReachableSigs()) if (!s.builtin) {
            SimTupleset ts = sfs.get("sig " + s.label);
            if (ts != null)
                ans.sfs.put(s, ts);
            for (final Field f : s.getFields()) if (!f.defined) {
                ts = sfs.get("field " + s.label + " " + f.label);
                if (ts != null)
                    ans.sfs.put(f, ts);
            }
        }
        // assign its value in the new SimInstance's sfs map
        if (vars != null)
            for (ExprVar v : vars) {
                SimTupleset ts = sfs.get("var " + v.label);
                if (ts != null)
                    ans.sfs.put(v, ts);
            }
        // close the files then return the answer
        bis.close();
        bis = null;
        fis.close();
        fis = null;
        return ans;
    } finally {
        // free the temporary array
        readcache = null;
        // if an exception occurred, we'll try to close to files anyway,
        // since open file descriptors is a scarce resource
        Util.close(bis);
        Util.close(fis);
    }
}

Example 29 with Sig

use of edu.mit.csail.sdg.ast.Sig in project org.alloytools.alloy by AlloyTools.

the class SimInstance method write.

/**
 * Write the bitwidth, maxseq, set of all atoms, and map of all sig/field/var
 * into the given file.
 */
private void write(BufferedOutputStream out) throws IOException {
    write(out, "maxseq = " + maxseq + ("\n" + "bitwidth = ") + bitwidth + "\n");
    for (Map.Entry<Expr, SimTupleset> entry : sfs.entrySet()) {
        Expr e = entry.getKey();
        if (e instanceof Sig)
            write(out, "sig " + ((Sig) e).label + " = ");
        else if (e instanceof Field)
            write(out, "field " + ((Field) e).sig.label + " " + ((Field) e).label + " = ");
        else if (e instanceof ExprVar)
            write(out, "var " + ((ExprVar) e).label + " = ");
        else
            continue;
        entry.getValue().write(out);
        out.write('\n');
    }
}

Example 30 with Sig

use of edu.mit.csail.sdg.ast.Sig 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 + ">");
    }
}