DIP 1020--Named Parameters--Community Review Round 1

[Walter Bright]

On 4/9/2019 12:46 PM, Seb wrote:
> It allows library authors optionally to control exactly which parameters are 
> positional and which are keyword-only and which are both.
> 
> [1] https://www.python.org/dev/peps/pep-0570/

Note that there is a way to require positional-only in D:

     int foo(int);

I.e. leave off the parameter name.

It works when there's a separate .di file from the implementation .d file (which 
would have the names). It won't work for template parameters.

As for renaming parameters,

     void foo(T oldname);

becomes:

     void foo(T)(T oldname) { return foo(newname : oldname); }
     void foo(T newname);

Yeah, it's a little awkward, but if you're renaming parameters you've got 
awkward backwards compatibility issues anyway.