On Monday, 10 March 2014 at 06:40:49 UTC, Kenji Hara wrote:
2014-03-10 6:31 GMT+09:00 Timon Gehr <[email protected]>:
http://wiki.dlang.org/DIP57
Thoughts?
From the "Semantics" section:
For static foreach statements, break and continue are
supported and
treated like for foreach statements over tuples.
This is questionable sentence. On the foreach with tuple
iteration, break and continue have no effect for the unrolling.
void main()
{
import std.typetuple, std.stdio;
foreach (i; TypeTuple!(1, 2, 3))
{
static if (i == 2) continue;
else static if (i == 3) break;
pragma(msg, "CT: i = ", i); // prints 1, 2, and 3 in CT
writeln("RT: i = ", i); // prints only 1 in RT
}
}
So, I think that static foreach *cannot* support break and
continue as same as foreach with tuples.
Kenji Hara
Ditto. This needs `static continue` and `static break`. Without
this functionality, the control flow in `static foreach` becomes
very unwieldy.
-Shammah
