On Monday, 24 October 2022 at 21:52:18 UTC, Ali Çehreli wrote:
On 10/24/22 14:26, Per Nordlöw wrote:
[...]
Another option is to use range functions where front() returns
a Tuple. We have an esoteric feature where a tuple expands
automatically in foreach loops:
import std.typecons : tuple;
import std.conv : to;
import std.stdio : writeln;
import std.range : take;
struct S {
size_t count;
bool empty = false;
auto front() {
const key = count;
const value = key.to!string;
return tuple(key, value); // <-- HERE
}
void popFront() {
++count;
}
}
void main() {
foreach (k, v; S.init.take(10))
{
writeln(k, ": ", v);
}
}
Ali
I didn't know about that esoteric feature. like this approach
