pub fn count(set: Set) std.math.IntFittingRange(0, needed_bit_count) set: Set1255
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1259 pub fn count(set: Set) std.math.IntFittingRange(0, needed_bit_count) {
var sum: usize = 0;
for (set.ints) |x| sum += @popCount(x);
return @intCast(sum);
}