set - multiple declarations

Function set

Constructor of a Set on an implicitly derived base type with a given sequence of intervals.

Function set

Constructor of the empty set.

auto s1 = set(interval('a'), interval('e', 'g'));
assert('f' in s1);
auto s2 = set(interval(6), interval(10, 14));
assert(11 in s2);
auto s3 = set(interval(8, 12));
auto s4 = s2 - s3;
assert(11 !in s4);
assert(6 in s4);
assert(13 in s4);
auto s5 = set();
assert(s5.card == 0);

assert(4 in set(interval(0, 10)));
assert(4 !in set(interval(-3, 3)));
assert(-4 !in set(interval(-3, 3)));
enum Count {One, Two, Three, Four, Five, Six, Seven, Eight, Nine, Ten}
auto i1 = interval(Count.Three, Count.Six);
auto i2 = interval(Count.Eight, Count.Ten);
auto s1 = set(i1, i2);
assert(s1.card == 7);
assert(Count.Nine in s1);
assert(Count.Seven !in s1);
s1 -= set(i2);
assert(s1.card == 4);
assert(Count.Four in s1);
assert(Count.Nine !in s1);

Function set

Constructor of Sets on an implicitly derived base type. It cannot support the range-like notation for Intervals like SetFactory does, but offers a 2-element array notation for intervals.

int i = 5;
auto s1 = set(1);
auto s2 = set(1, [1,2], i);
assert(2 in s2);
enum Count {One, Two, Three, Four, Five}
auto s3 = set([Count.Three, Count.Five]);
s3 += set(Count.One);
assert(Count.Four in s3);
assert(Count.One in s3);
assert(Count.Two !in s3);