On Monday, 5 September 2016 at 15:50:31 UTC, Lodovico Giaretta
wrote:
On Monday, 5 September 2016 at 15:43:43 UTC, Nick Treleaven
wrote:
We can already (almost do that):
========================================================
import std.stdio, std.typecons;
void unpack(T...)(Tuple!T tup, out T decls)
{
static if (tup.length > 0)
{
decls[0] = tup[0];
tuple(tup[1..$]).unpack(decls[1..$]);
}
}
void main()
{
auto t = tuple(1, "a", 3.0);
int i;
string s;
double d;
t.unpack(i, s, d);
writeln(i);
writeln(s);
writeln(d);
}
The main benefit of supporting tuple syntax is unpacking into new
declarations (writing Tuple!(...) or tuple!(...) isn't that
significant IMO). I was suggesting that out argument
*declarations* actually provides this and is a more general
feature.
