On 6/22/15 1:03 PM, Assembly wrote:
On Monday, 22 June 2015 at 16:52:15 UTC, Ali Çehreli wrote:
On 06/22/2015 09:37 AM, q66 wrote:
use opApply.
Yes. Additionally, an InputRange interface can be used:
http://ddili.org/ders/d.en/foreach_opapply.html
Ali
I was reading exaclty this page that.
I've had implmented this method/properties (I remembered how foreach()
is translated to for() by the compiler using front/popFront() and such):
T front() { return _app.data[index]; }
T front(int index, T a) { return _app.data[index]; }
void popFront()
{
index++;
}
and called like this:
foreach(int i, MyType p; places) {
but I get this error:
Error: cannot infer argument types, expected 1 argument, not 2
to try solve that error I added the overload method:
T front(int index, T a)
but it didn't worked. How do I solve this?
TBH, opApply is much better suited to classes.
But in order to have multiple parameters with foreach by using a range,
you must return a tuple:
auto front() { import std.typecons: tuple; return tuple(index,
_app.data[index]);}
Note, do NOT do this on your class, you should be creating a range
struct type, and return the range from opIndex() with no parameters.
-Steve
