auto return for some recursive functions in C++11

[bearophile via Digitalmars-d]

According to Wikipedia:
http://en.wikipedia.org/wiki/C%2B%2B14#Function_return_type_deduction
C++14 is able to compile code like this:


auto correct(int i) {
    if (i == 1)
        return i;
    else
        return correct(i - 1) + i;
}


But not like this:

auto correct(int i) {
    if (i != 1)
        return correct(i - 1) + i;
    else
        return i;
}


D isn't able to compile both. Is it a good idea to allow the 
first function in D too?

Bye,
bearophile