Examples with ProjectExpression kodkod.ast.ProjectExpression used on opensource projects

Example 1 with ProjectExpression

use of kodkod.ast.ProjectExpression in project org.alloytools.alloy by AlloyTools.

the class AbstractReplacer method visit.

/**
 * Calls lookup(decls) and returns the cached value, if any. If a replacement
 * has not been cached, visits each of the children's variable and expression.
 * If nothing changes, the argument is cached and returned, otherwise a
 * replacement Decls object is cached and returned.
 *
 * @return { d: Decls | d.size = decls.size && all i: [0..d.size) |
 *         d.declarations[i] = decls.declarations[i].accept(delegate) }
 */
@Override
public Expression visit(ProjectExpression project) {
    Expression ret = lookup(project);
    if (ret != null)
        return ret;
    final Expression expr = project.expression().accept(delegate);
    final IntExpression[] cols = new IntExpression[project.arity()];
    boolean allSame = expr == project.expression();
    for (int i = 0, arity = project.arity(); i < arity; i++) {
        cols[i] = project.column(i).accept(delegate);
        allSame = allSame && (cols[i] == project.column(i));
    }
    ret = allSame ? project : expr.project(cols);
    return cache(project, ret);
}

Example 2 with ProjectExpression

use of kodkod.ast.ProjectExpression in project org.alloytools.alloy by AlloyTools.

the class TranslateKodkodToJava method countHeight.

/**
 * Count the height of the given Kodkod AST tree.
 */
public static int countHeight(Node node) {
    ReturnVisitor<Integer, Integer, Integer, Integer> vis = new ReturnVisitor<Integer, Integer, Integer, Integer>() {

        private int max(int a, int b) {
            return (a >= b) ? a : b;
        }

        private int max(int a, int b, int c) {
            return (a >= b) ? (a >= c ? a : c) : (b >= c ? b : c);
        }

        @Override
        public Integer visit(Relation x) {
            return 1;
        }

        @Override
        public Integer visit(IntConstant x) {
            return 1;
        }

        @Override
        public Integer visit(ConstantFormula x) {
            return 1;
        }

        @Override
        public Integer visit(Variable x) {
            return 1;
        }

        @Override
        public Integer visit(ConstantExpression x) {
            return 1;
        }

        @Override
        public Integer visit(NotFormula x) {
            return 1 + x.formula().accept(this);
        }

        @Override
        public Integer visit(IntToExprCast x) {
            return 1 + x.intExpr().accept(this);
        }

        @Override
        public Integer visit(Decl x) {
            return 1 + x.expression().accept(this);
        }

        @Override
        public Integer visit(ExprToIntCast x) {
            return 1 + x.expression().accept(this);
        }

        @Override
        public Integer visit(UnaryExpression x) {
            return 1 + x.expression().accept(this);
        }

        @Override
        public Integer visit(UnaryIntExpression x) {
            return 1 + x.intExpr().accept(this);
        }

        @Override
        public Integer visit(MultiplicityFormula x) {
            return 1 + x.expression().accept(this);
        }

        @Override
        public Integer visit(BinaryExpression x) {
            return 1 + max(x.left().accept(this), x.right().accept(this));
        }

        @Override
        public Integer visit(ComparisonFormula x) {
            return 1 + max(x.left().accept(this), x.right().accept(this));
        }

        @Override
        public Integer visit(BinaryFormula x) {
            return 1 + max(x.left().accept(this), x.right().accept(this));
        }

        @Override
        public Integer visit(BinaryIntExpression x) {
            return 1 + max(x.left().accept(this), x.right().accept(this));
        }

        @Override
        public Integer visit(IntComparisonFormula x) {
            return 1 + max(x.left().accept(this), x.right().accept(this));
        }

        @Override
        public Integer visit(IfExpression x) {
            return 1 + max(x.condition().accept(this), x.thenExpr().accept(this), x.elseExpr().accept(this));
        }

        @Override
        public Integer visit(IfIntExpression x) {
            return 1 + max(x.condition().accept(this), x.thenExpr().accept(this), x.elseExpr().accept(this));
        }

        @Override
        public Integer visit(SumExpression x) {
            return 1 + max(x.decls().accept(this), x.intExpr().accept(this));
        }

        @Override
        public Integer visit(QuantifiedFormula x) {
            return 1 + max(x.decls().accept(this), x.formula().accept(this));
        }

        @Override
        public Integer visit(FixFormula x) {
            return 1 + max(x.condition().accept(this), x.formula().accept(this));
        }

        @Override
        public Integer visit(Comprehension x) {
            return 1 + max(x.decls().accept(this), x.formula().accept(this));
        }

        @Override
        public Integer visit(Decls x) {
            int max = 0, n = x.size();
            for (int i = 0; i < n; i++) max = max(max, x.get(i).accept(this));
            return max;
        }

        @Override
        public Integer visit(ProjectExpression x) {
            int max = x.expression().accept(this);
            for (Iterator<IntExpression> t = x.columns(); t.hasNext(); ) {
                max = max(max, t.next().accept(this));
            }
            return max;
        }

        @Override
        public Integer visit(RelationPredicate x) {
            if (x instanceof Function) {
                Function f = ((Function) x);
                return max(f.domain().accept(this), f.range().accept(this));
            }
            return 1;
        }

        @Override
        public Integer visit(NaryExpression x) {
            int max = 0;
            for (int m = 0, n = x.size(), i = 0; i < n; i++) {
                m = x.child(i).accept(this);
                if (i == 0 || max < m)
                    max = m;
            }
            return max + 1;
        }

        @Override
        public Integer visit(NaryIntExpression x) {
            int max = 0;
            for (int m = 0, n = x.size(), i = 0; i < n; i++) {
                m = x.child(i).accept(this);
                if (i == 0 || max < m)
                    max = m;
            }
            return max + 1;
        }

        @Override
        public Integer visit(NaryFormula x) {
            int max = 0;
            for (int m = 0, n = x.size(), i = 0; i < n; i++) {
                m = x.child(i).accept(this);
                if (i == 0 || max < m)
                    max = m;
            }
            return max + 1;
        }
    };
    Object ans = node.accept(vis);
    if (ans instanceof Integer)
        return ((Integer) ans).intValue();
    else
        return 0;
}