is size_t always unsigned?

Question

As title: is size_t always unsigned, i.e. for size_t x, is x always >= 0 ?

Answer 1

Oh, this is just terrible:

vector arr;
Fill(arr);
size_t size = arr.size();
for(size_t i = 1; i < size - 1; ++i)
{
  auto obj = arr[i];
  auto next = arr[i+1];
}

Now contemplate the use case where arr is empty.