named arguments, string interpolation, please stop.

[Walter Bright]

On 1/11/2024 5:21 PM, H. S. Teoh wrote:
> 	void registerCallback(void delegate() cb);
> 
> Problem: @safe code can't call this. @nogc code can't call this. BetterC
> code can't call it either.

```d
extern(C) void registerCallback(void delegate() cb)
{
     cb();
}

void boo()
{
     extern (C) void delegate() cb;
     registerCallback(cb);
}
```
compiles with -betterC