On Friday, 24 February 2023 at 14:22:17 UTC, user1234 wrote:
you can break using `goto`, restore `static` everywhere, and
using local introspection determine whether the result exists.
```d
struct Bar
{
@("hello") int t;
}
static bool hasAttribute(alias F, T)()
{
static foreach (a; __traits(getAttributes, F))
{
static if (is(typeof(a) : T))
{
enum result = true;
goto L0;
}
}
L0:
static if (is(typeof(result)))
return result;
else
return false;
}
void main()
{
import std.stdio;
writeln(hasAttribute!(Bar.t, string));
}
```
Unfortunately there is a serious bug in this code. Take a look at
what happens when you try it with this `struct Bar`:
```d
struct Bar
{
@("hello") @("goodbye") int t;
}
```
