C# 7 Features - Tuples

[Nick Treleaven via Digitalmars-d]

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.