Multiple return values...

[Martin Nowak]

>> Shall we discuss the shortcomings of his implementation? Can someone
>> demonstrate the details of his implementation?
>>  From the little examples up in the thread, it looked like you could
>> only declare new variables inline, but not assign out to existing ones.
>> I'd say this needs to be added too, and perhaps that will throw the
>> whole design into turmoil? ;)
>
We already have very flexible assignments to existing variables.

import std.typecons, std.typetuple, std.stdio;

Tuple!(int, int) foo()
{
     return typeof(return)(1, 2);
}

void main()
{
     int a, b;
     TypeTuple!(a, b) = foo();
     writeln(a, b);

     TypeTuple!(a, b) = tuple(0, 1, 2)[0 .. 2];
     writeln(a, b);

     Tuple!(int, int) t;
     t[] = TypeTuple!(a, b);
     writeln(t);

     TypeTuple!(a, b) = tuple(t[1], t[0]);
     writeln(a, b);
}