Debug help - opDispatch - unknown member function

[monkyyy]

On Tuesday, 9 September 2025 at 20:56:19 UTC, Steven 
Schveighoffer wrote:
> On Tuesday, 9 September 2025 at 20:08:06 UTC, monkyyy wrote:
>> On Tuesday, 9 September 2025 at 19:17:11 UTC, Steven 
>> Schveighoffer wrote:
>>> 
>>> In short `opDispatch` only is valid if it compiles. If it 
>>> doesn't compile, it's as if it doesn't exist.
>>
>> Yours still thinking declaratively, that cant be true. The 
>> best description of its behavior is that it discards errors.
>>
>> ```d
>> import std;
>> enum counter=cast(immutable(void)*)[0].ptr;
>> auto getcount()=>(*(cast(int*)counter));
>> auto count()=>(*(cast(int*)counter))++;
>>
>> struct foo{
>>     void opDispatch(string s)(){
>>         enum _=count();
>>         static assert(0);
>>     }
>> }
>> void bar(foo){}
>> void foobar(foo){}
>> unittest{
>>     foo().bar;
>>     foo().foobar;
>>     getcount.writeln;//2
>> }
>> ```
>
> This calls the UFCS versions, because the `opDispatch` version 
> does not compile.
>
> The other thing is just a bug.
>
> -Steve

```d
import std;
struct foo{
     void opDispatch(string s)(){
         pragma(msg,"hi");
         static assert(0);
     }
}
void bar(foo){}
unittest{
     foo().bar;//prints hi
}
```
Even if you were egregious bigoted to some features out of some 
kind of spec purity belief; its demonstrable with entirely in 
spec behavior