On Wednesday, 8 October 2025 at 08:48:12 UTC, Kagamin wrote:
To be pedantic, strong purity requires immutable arguments,
const are not enough:
```
void main()
{
import std.stdio : writeln;
int[] numbers = [5, 6, 7, 8, 9];
writeln("numbers before: ", id(numbers));
numbers[0]=1;
writeln("numbers after : ", id(numbers));
}
const(int)[] id(const int[] p) pure
{
return p;
}
```
Yes, thank you for the correction.
I got this confused with pure factory functions, where returning
a mutable item from const parameters allows the compiler to
assume the return value is unique.
-Steve
