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Pass by reference #43

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vavrines opened this issue Nov 7, 2022 · 0 comments

vavrines commented Nov 7, 2022 •

edited

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The assignment operation, i.e.,

xt::jltensor<double, 1> test(xt::jltensor<double, 1> u) {
  xt::jltensor<double, 1> f = u;
  return f;
}

cannot be performed in-place through

void test(xt::jltensor<double, 1> f, xt::jltensor<double, 1> u) {
  f = u;
}

~~This is understandable since the argument is value instead of the reference.~~
Is there a workaround for the in-place mutation?

edit: an explicit for-loop can do this

void test1([T](xt::jltensor<double, 1> f, xt::jltensor<double, 1> u) { 
  int nu = u.shape(0);
  for (int i = 0; i < nu; i++) {
    f[i] = u[i];
  }
}

But is there an easier way?

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