On Thursday, 1 January 2026 at 19:06:44 UTC, monkyyy wrote:
also worth considering if you abuse the range api:
```d
import std;
template innate(T,int line){
T innate;
}
auto panicswitch(int line=__LINE__,R)(R r){
struct panicable{
R r;
auto front()=>r.front;
void popFront(){r.popFront;}
auto empty()=>innate!(bool,line) || r.empty;
bool* getbutton()=>&innate!(bool,line);
}
innate!(bool,line)=false;
return panicable(r);
}
unittest{
auto r=iota(10)
.map!(a=>a*2)
.filter!(a=>a%3)
.panicswitch;
auto panic=r.getbutton;
foreach(e;r){
if(e>5){
*panic=true;
}
e.writeln;
}
}
```
