Exemple #1
0
void interval_test() {
    Interval e = Interval::everything();
    Interval n = Interval::nothing();
    Expr x = Variable::make(Int(32), "x");
    Interval xp{x, Interval::pos_inf};
    Interval xn{Interval::neg_inf, x};
    Interval xx{x, x};

    internal_assert(e.is_everything());
    internal_assert(!e.has_upper_bound());
    internal_assert(!e.has_lower_bound());
    internal_assert(!e.is_empty());
    internal_assert(!e.is_bounded());
    internal_assert(!e.is_single_point());

    internal_assert(!n.is_everything());
    internal_assert(!n.has_upper_bound());
    internal_assert(!n.has_lower_bound());
    internal_assert(n.is_empty());
    internal_assert(!n.is_bounded());
    internal_assert(!n.is_single_point());

    internal_assert(!xp.is_everything());
    internal_assert(!xp.has_upper_bound());
    internal_assert(xp.has_lower_bound());
    internal_assert(!xp.is_empty());
    internal_assert(!xp.is_bounded());
    internal_assert(!xp.is_single_point());

    internal_assert(!xn.is_everything());
    internal_assert(xn.has_upper_bound());
    internal_assert(!xn.has_lower_bound());
    internal_assert(!xn.is_empty());
    internal_assert(!xn.is_bounded());
    internal_assert(!xn.is_single_point());

    internal_assert(!xx.is_everything());
    internal_assert(xx.has_upper_bound());
    internal_assert(xx.has_lower_bound());
    internal_assert(!xx.is_empty());
    internal_assert(xx.is_bounded());
    internal_assert(xx.is_single_point());

    check(Interval::make_union(xp, xn), e, __LINE__);
    check(Interval::make_union(e, xn), e, __LINE__);
    check(Interval::make_union(xn, e), e, __LINE__);
    check(Interval::make_union(xn, n), xn, __LINE__);
    check(Interval::make_union(n, xp), xp, __LINE__);
    check(Interval::make_union(xp, xp), xp, __LINE__);

    check(Interval::make_intersection(xp, xn), Interval::single_point(x), __LINE__);
    check(Interval::make_intersection(e, xn), xn, __LINE__);
    check(Interval::make_intersection(xn, e), xn, __LINE__);
    check(Interval::make_intersection(xn, n), n, __LINE__);
    check(Interval::make_intersection(n, xp), n, __LINE__);
    check(Interval::make_intersection(xp, xp), xp, __LINE__);

    check(Interval::make_union({3, Interval::pos_inf}, {5, Interval::pos_inf}), {3, Interval::pos_inf}, __LINE__);
    check(Interval::make_intersection({3, Interval::pos_inf}, {5, Interval::pos_inf}), {5, Interval::pos_inf}, __LINE__);

    check(Interval::make_union({Interval::neg_inf, 3}, {Interval::neg_inf, 5}), {Interval::neg_inf, 5}, __LINE__);
    check(Interval::make_intersection({Interval::neg_inf, 3}, {Interval::neg_inf, 5}), {Interval::neg_inf, 3}, __LINE__);

    check(Interval::make_union({3, 4}, {9, 10}), {3, 10}, __LINE__);
    check(Interval::make_intersection({3, 4}, {9, 10}), {9, 4}, __LINE__);

    check(Interval::make_union({3, 9}, {4, 10}), {3, 10}, __LINE__);
    check(Interval::make_intersection({3, 9}, {4, 10}), {4, 9}, __LINE__);

    std::cout << "Interval test passed" << std::endl;
}
Exemple #2
0
Expr get_extent(const Interval &i) {
    if (!i.is_bounded()) {
        return Expr();
    }
    return simplify(i.max - i.min + 1);
}