Why does partial ordering of overloaded functions not take return type into account?

[cym13 via Digitalmars-d-learn]

On Saturday, 20 February 2016 at 17:22:49 UTC, Mike Parker wrote:
> On Saturday, 20 February 2016 at 17:20:16 UTC, Mike Parker 
> wrote:
>
>> getValue();
>>
>> It's not unusual to discard the return value when calling a 
>> function. Though a getter isn't a good example of this, of 
>> course.
>
> Oops. I somehow had it in my head that your example function 
> was getValue(), rather than thing(). Anyway, my point was that 
> the return value is not always used when calling a function 
> with side effects.

There's also the nice case:

     void foo(string s) {
         ...
     }

     void foo(int i) {
         ...
     }

     string bar() {
         ...
     }

     int bar() {
         ...
     }

     void main() {
         foo(bar); // Which one is it supposed to be?
     }