Puzzled by this behavior

[Timon Gehr]

On 31.05.22 19:41, Don Allen wrote:
> 
> But
> ````
> import std.stdio;
> 
> int main(string[] args)
> {
>      void foo() {
>          bar();
>      }
>      void bar() {
>          writeln("Hello world");
>      }
>      foo();
>      return 0;
> }
> ````
> gives the error
> ````
> (dmd-2.100.0)dca at pangloss.allen.net:/home/dca/Software/d_tests$ dmd test5.d
> test5.d(6): Error: undefined identifier `bar`
> ````
> This only works if you interchange the order of foo and bar, eliminating 
> the
> forward reference.
> 
> This strikes me as pretty inconsistent behavior

Not sure if it's necessarily "inconsistent", but it is quite annoying 
and not really necessary. I have also complained about this before.

The simplest workaround is to make `foo` a template:

```d
import std.stdio;

int main(string[] args){
     void foo()(){
         bar();
     }
     void bar(){
         writeln("Hello world");
     }
     foo();
     return 0;
}
```