EnumContinuousSequency

enum Count {
    zero,
    one,
    two,
    three
}

static assert(EnumContinuousSequency!Count);

enum NoCount {
    zero,
    one,
    three = 3
}

static assert(!EnumContinuousSequency!NoCount);

enum OffsetCount {
    one = 1,
    two,
    three
}

static assert(EnumContinuousSequency!OffsetCount);