operator[] on Vector2 won't let me assign value

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:bust_in_silhouette: Asked By capt_sms

I have a problem with Vector2 class in my custom C++ module. I’m trying to fill an array of PoolVector2Arrays with values. I init it with zeros and then I try to exchange the x and y values using operators [] and =:

std::array<PoolVector2Array, 6> arrs2d;
while (arrs2d.at(siz(BodyKeypoints::ALL)).size() < 33)
{
	Vector2 vi2 = {0, 0};
	arrs2d.at(siz(BodyKeypoints::ALL)).append(vi2);
	Vector3 vi3 = {0, 0, 0};
	arrs3d.at(siz(BodyKeypoints::ALL)).append(vi3);
}
while (arrs2d[siz(BodyKeypoints::ALL)].size() < 2)
{
	Vector2 iv(0.0, 0.0);
	arrs2d[siz(BodyKeypoints::ALL)].append(iv);
}
//td.keypoints == std::vector<std::vector<double>>
arrs2d[siz(BodyKeypoints::ALL)][i][0] = td.keypoints.at(i).at(0);
arrs2d[siz(BodyKeypoints::ALL)][i][1] = td.keypoints.at(i).at(1);
std::wostringstream strstr;
strstr << arrs2d[siz(BodyKeypoints::ALL)][i][0] << "/" << td.keypoints.at(i).at(0) << std::endl;
strstr << arrs2d[siz(BodyKeypoints::ALL)][i][1] << "/" << td.keypoints.at(i).at(1) << std::endl;
print_error(strstr.str().c_str());

The output is like this:

0/188.627
0/609.072

So the values are there as double but then they are not replacing the real_t values of Vector2 object. What am I missing?