gistfile1.txt

std::vector<int> multiply (std::vector<int> input, int value)
{
   for (auto& i : input )
      i *= value;
   return input;
}

int main (int, char**)
{
    std::vector<int> foo;
    foo.push_back(1);
    foo.push_back(2);

    foo = multiply(foo, 2);

    // Assuming a (very) aggressive inlining compiler,
    // the last line could be rewritten as:
    for (auto& i : foo)
      i *= 2;
    // ... no copy or move occurs!
}

Perhaps I'm pushing it, but does is this inlining technically legal, given the standard "explicitly forbids eliding the move in [the case that the function returns its argument]"?