DIP 1019--Named Arguments Lite--Community Review Round 2

[aliak]

On Friday, 7 June 2019 at 06:30:15 UTC, Walter Bright wrote:
> On 6/6/2019 2:43 PM, Aliak wrote:
>> On Thursday, 6 June 2019 at 20:04:15 UTC, Walter Bright wrote:
>>>    discovered as necessary behavior. Consider:
>>>
>>>     void snoopy(T t, int i, S s);     // A
>>>     void snoopy(S s, int i = 0; T t); // B
>>>
>>> and calling it:
>>>
>>>     snoopy(t:t, i, s:s); // A
>>>     snoopy(s:s, t:t, i); // A
>> 
>> Trying to understand why the last two call A and are not 
>> ambiguous?
>
> Argument `i` is not named, and so can only appear after `t` in 
> A, and only after `s` in B. This only works for A.

What makes i unnamed and the others named?

You mean you want for unnamed arguments to only occur after the 
last named argument?