On Monday, 20 October 2025 at 17:56:24 UTC, monkyyy wrote:
someone swapped the tradeoffs then calling it a bug is
misleading
if you disagree pls fix this bug
```d
import std;
bool issubset(T)(T[] a,T[] b){
T* c=min(&a[0],&b[0]);
T* d=max(&a[$-1],&b[$-1]);
return &a[0]==c&& &a[$-1]==d;
}
unittest{
int[100] foo;
assert(issubset(foo[10..20],foo[15..19]));
assert( ! issubset(foo[50..100],foo[15..30]));
}
unittest{
int[] data=[1,2,3];
int[] tail=data[1..$];
assert(issubset(data,tail));
assert(data.capacity>0);
assert(tail.capacity>0);
data.length+=1;
assert(data[$-1]==int.init);
data[$-1]=4;
assert(data[$-1]==4);
assert(issubset(data,tail));
assert(tail.capacity>0);
tail.length+=1;
assert(tail[$-1]==int.init);
assert(issubset(data,tail));
}
```
Hard to understand this code. If you think this is an issue,
please file at https://github.com/dlang/dmd/issues
Please include explanatory information, and what you expect to
happen.
-Steve
