Named parameters in function call

[Paul Backus]

On Tuesday, 8 September 2020 at 13:28:22 UTC, Cecil Ward wrote:
>
> I wonder if there is any way in which we could combine this 
> with strong typing of some sort (how?) to detect errors such as
>     int xcoord;
>     int ycoord;
>
>     myfunc( x : ycoord, y : xcoord, color : blue )        [3]
>
> where the arguments are the wrong way around. Would have to 
> change the types of the xcoord and ycoord variables somehow, 
> something I have asked about earlier.

import std.typecons: Typedef;

alias XCoord = Typedef!(int, int.init, "XCoord");
alias YCoord = Typedef!(int, int.init, "YCoord");

auto myfunc(XCoord x, YCoord y) { ... }