Examples with Pair org.eclipse.xtext.util.Pair used on opensource projects

Example 6 with Pair

use of org.eclipse.xtext.util.Pair in project xtext-core by eclipse.

the class AbstractPDAProvider method getPDA.

/**
 * @since 2.0
 */
@Override
public IPDAState getPDA(CTX context) {
    PDAContext<CTX> ctx = createContext(context);
    ctx.start = createState(IPDAState.PDAStateType.START, null);
    ctx.stop = createState(IPDAState.PDAStateType.STOP, null);
    Set<Pair<Boolean, INFAState<?, ?>>> visited = Sets.newHashSet();
    ctx.start.followers = Sets.newHashSet();
    for (INFAState<?, ?> state : getStartFollowers(context)) {
        boolean targetCanReturn = !canEnterRuleCall(state);
        boolean targetReturning = !state.getOutgoingAfterReturn().isEmpty() && targetCanReturn;
        RuleCallStackElement stack = new RuleCallStackElement(null, null);
        IPDAState s = createState(ctx, stack, state, null, targetReturning, targetCanReturn, visited);
        if (s != null)
            ctx.start.followers.add(s);
    }
    return ctx.start;
}

Example 7 with Pair

use of org.eclipse.xtext.util.Pair in project xtext-core by eclipse.

the class ConcreteSyntaxValidator method validateQuantities.

protected List<IConcreteSyntaxDiagnostic> validateQuantities(IQuantities quants, ISyntaxConstraint rule) {
    List<IConcreteSyntaxDiagnostic> diag = new ArrayList<IConcreteSyntaxDiagnostic>();
    Map<ISyntaxConstraint, Pair<Integer, Integer>> minmax = Maps.newHashMap();
    for (Map.Entry<EStructuralFeature, Collection<ISyntaxConstraint>> e : quants.groupByFeature().entrySet()) {
        int min = UNDEF, max = 0;
        Set<ISyntaxConstraint> involved = new HashSet<ISyntaxConstraint>();
        for (ISyntaxConstraint a : e.getValue()) {
            involved.add(a);
            int mi = intervalProvider.getMin(quants, a, involved);
            if (mi != UNDEF)
                min = min == UNDEF ? mi : mi + min;
            int ma = intervalProvider.getMax(quants, a, involved, null);
            if (ma != UNDEF && max != MAX)
                max = ma == MAX ? ma : max + ma;
            minmax.put(a, Tuples.create(mi, ma));
        }
        int actual = quants.getFeatureQuantity(e.getKey());
        if (actual < min || actual > max)
            diag.add(diagnosticProvider.createFeatureQuantityDiagnostic(rule, quants, e.getKey(), actual, min, max, involved));
    }
    // System.out.println("Validation: " + obj.toString(minmax));
    return diag;
}

Example 8 with Pair

use of org.eclipse.xtext.util.Pair in project xtext-core by eclipse.

the class StringCfg method rule.

public ProdElement rule(String rule) {
    Stack<Pair<Token, String>> tokens = lex(rule);
    if (tokens.peek().getFirst() == Token.ID) {
        String ruleName = tokens.peek().getSecond();
        tokens.pop();
        if (tokens.peek().getFirst() == Token.COLON) {
            tokens.pop();
            ProdElement ele = parseAlt(tokens);
            if (root == null)
                root = ele;
            rules.put(ruleName, ele);
            return ele;
        } else
            throw new RuntimeException("Expected ':'");
    } else
        throw new RuntimeException("Expected ID");
}