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

Example 16 with ErrorSyntax

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

the class ScopeComputer method derive_abstract_scope.

// ===========================================================================================================================//
/**
 * If A is abstract, unscoped, and all children are scoped, then set A's scope
 * to be the sum; if A is abstract, scoped, and every child except one is
 * scoped, then set that child's scope to be the difference.
 */
private boolean derive_abstract_scope(Iterable<Sig> sigs) throws Err {
    boolean changed = false;
    again: for (Sig s : sigs) if (!s.builtin && (s instanceof PrimSig) && s.isAbstract != null) {
        SafeList<PrimSig> subs = ((PrimSig) s).children();
        if (subs.size() == 0)
            continue;
        Sig missing = null;
        int sum = 0;
        for (Sig c : subs) {
            int cn = sig2scope(c);
            if (cn < 0) {
                if (missing == null) {
                    missing = c;
                    continue;
                } else {
                    continue again;
                }
            }
            sum = sum + cn;
            if (sum < 0)
                throw new ErrorSyntax(cmd.pos, "The number of atoms exceeds the internal limit of " + Integer.MAX_VALUE);
        }
        int sn = sig2scope(s);
        if (sn < 0) {
            if (missing != null)
                continue;
            sig2scope(s, sum);
            changed = true;
        } else if (missing != null) {
            sig2scope(missing, (sn < sum) ? 0 : sn - sum);
            changed = true;
        }
    }
    return changed;
}

Example 17 with ErrorSyntax

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

the class ScopeComputer method setBitwidth.

/**
 * Modifies the integer bitwidth of this solution's model (and sets the max
 * sequence length to 0)
 */
private void setBitwidth(Pos pos, int newBitwidth) throws ErrorAPI, ErrorSyntax {
    if (newBitwidth < 0)
        throw new ErrorSyntax(pos, "Cannot specify a bitwidth less than 0");
    if (newBitwidth > 30)
        throw new ErrorSyntax(pos, "Cannot specify a bitwidth greater than 30");
    bitwidth = newBitwidth;
    maxseq = 0;
    sig2scope.put(SIGINT, bitwidth < 1 ? 0 : 1 << bitwidth);
    sig2scope.put(SEQIDX, 0);
}

Example 18 with ErrorSyntax

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

the class CUP$CompParser$actions method c.

private void c(boolean follow, ExprVar o, ExprVar x, ExprVar n, Expr e, List<CommandScope> s, ExprConstant c) throws Err {
    if (n != null)
        nod(n);
    int bitwidth = (-1), maxseq = (-1), overall = (-1), expects = (c == null ? -1 : c.num);
    Pos p = o.pos.merge(n != null ? n.span() : e.span());
    for (int i = s.size() - 1; i >= 0; i--) {
        Sig j = s.get(i).sig;
        int k = s.get(i).startingScope;
        p = p.merge(j.pos);
        if (j.label.equals("univ")) {
            overall = k;
            s.remove(i);
            continue;
        }
        if (j.label.equals("int")) {
            if (bitwidth >= 0)
                throw new ErrorSyntax(j.pos, "The bitwidth cannot be specified more than once.");
            bitwidth = k;
            s.remove(i);
            continue;
        }
        if (j.label.equals("seq")) {
            if (maxseq >= 0)
                throw new ErrorSyntax(j.pos, "The maximum sequence length cannot be specified more than once.");
            maxseq = k;
            s.remove(i);
            continue;
        }
    }
    if (n != null)
        parser.alloymodule.addCommand(follow, p, n, o.label.equals("c"), overall, bitwidth, maxseq, expects, s, x);
    else
        parser.alloymodule.addCommand(follow, p, e, o.label.equals("c"), overall, bitwidth, maxseq, expects, s, x);
}

Example 19 with ErrorSyntax

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

the class CompUtil method parseEverything_fromFile.

/**
 * Read everything from "file" and parse it; if it mentions submodules, open
 * them and parse them too.
 *
 * @param rep - if nonnull, we will report compilation progress messages to it
 * @param loaded - a cache of files that have been pre-fetched (can be null if
 *            there were no prefetching)
 * @param filename - the main module we are parsing
 * @param initialResolutionMode - use 1 for the historical behavior, and 2 for
 *            Alloy 4.2's new "universal implicit this" name resolution behavior
 * @return the root CompModule which contains pointers to all submodules
 * @throws Err if an error occurred
 *             <p>
 *             And if loaded!=null, it will contain all the files needed for
 *             this parse, and furthermore, other entries will be deleted.
 */
public static CompModule parseEverything_fromFile(A4Reporter rep, Map<String, String> loaded, String filename, int initialResolutionMode) throws Err {
    try {
        filename = Util.canon(filename);
        Set<String> thispath = new LinkedHashSet<String>();
        if (loaded == null)
            loaded = new LinkedHashMap<String, String>();
        Map<String, String> fc = new LinkedHashMap<String, String>(loaded);
        loaded.clear();
        List<Object> seenDollar = new ArrayList<Object>();
        CompModule root = parseRecursively(seenDollar, loaded, fc, new Pos(filename, 1, 1), filename, null, "", thispath, initialResolutionMode);
        // if no sigs are defined by the user, add one
        if (root.getAllReachableUserDefinedSigs().isEmpty()) {
            root.addGhostSig();
        }
        root.seenDollar = seenDollar.size() > 0;
        return CompModule.resolveAll(rep == null ? A4Reporter.NOP : rep, root);
    } catch (FileNotFoundException ex) {
        throw new ErrorSyntax("File cannot be found.\n" + ex.getMessage(), ex);
    } catch (IOException ex) {
        throw new ErrorFatal("IOException occurred: " + ex.getMessage(), ex);
    } catch (Throwable ex) {
        if (ex instanceof Err)
            throw (Err) ex;
        else
            throw new ErrorFatal("Unknown exception occurred: " + ex, ex);
    }
}

Example 20 with ErrorSyntax

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

the class CompUtil method parseRecursively.

// =============================================================================================================//
/**
 * Helper method that recursively parse a file and all its included subfiles
 *
 * @param loaded - this stores the text files we've loaded while parsing; cannot
 *            be null
 * @param fc - if a file cannot be found, we consult this cache first before
 *            attempting to load it from disk/jar; cannot be null
 * @param pos - the position of the "open" statement
 * @param filename - the filename to open
 * @param root - the root module (this field is ignored if prefix=="")
 * @param prefix - the prefix for the file we are about to parse
 * @param thispath - the set of filenames involved in the current
 *            chain_of_file_opening
 */
private static CompModule parseRecursively(List<Object> seenDollar, Map<String, String> loaded, Map<String, String> fc, Pos pos, String filename, CompModule root, String prefix, Set<String> thispath, int initialResolution) throws Err, FileNotFoundException, IOException {
    // repeated.
    if (thispath.contains(filename))
        throw new ErrorSyntax(pos, "Circular dependency in module import. The file \"" + (new File(filename)).getName() + "\" is imported infinitely often.");
    thispath.add(filename);
    // No cycle detected so far. So now we parse the file.
    CompModule u = CompUtil.parse(seenDollar, loaded, fc, root, 0, filename, prefix, initialResolution);
    if (prefix.length() == 0)
        root = u;
    // Here, we recursively open the included files
    for (Open x : u.getOpens()) {
        String cp = Util.canon(computeModulePath(u.getModelName(), filename, x.filename)), content = fc.get(cp);
        try {
            if (content == null) {
                content = loaded.get(cp);
            }
            if (content == null) {
                content = fc.get(x.filename);
                if (content != null)
                    cp = x.filename;
            }
            if (content == null) {
                content = loaded.get(x.filename);
                if (content != null)
                    cp = x.filename;
            }
            if (content == null) {
                content = Util.readAll(cp);
            }
        } catch (IOException ex1) {
            try {
                String newCp = (Util.jarPrefix() + "models/" + x.filename + ".als").replace('/', File.separatorChar);
                content = Util.readAll(newCp);
                cp = newCp;
            } catch (IOException ex) {
                throw new ErrorSyntax(x.pos, "This module cannot be found.\nIt is not a built-in library module, and it cannot be found at \"" + cp + "\".\n");
            }
        }
        loaded.put(cp, content);
        x.setResolvedFilePath(cp);
        CompModule y = parseRecursively(seenDollar, loaded, fc, x.pos, cp, root, (prefix.length() == 0 ? x.alias : prefix + "/" + x.alias), thispath, initialResolution);
        x.connect(y);
    }
    // Remove this file from the CYCLE DETECTION
    thispath.remove(filename);
    // LIST.
    return u;
}