DIP 1019--Named Arguments Lite--Final Review

[H. S. Teoh]

On Fri, Aug 23, 2019 at 05:16:16PM +0000, bachmeier via Digitalmars-d wrote:
> On Friday, 23 August 2019 at 16:47:14 UTC, H. S. Teoh wrote:
[...]
> > But this DIP neither enables nor disables inordinately long
> > parameter lists: the language already allows them!  The only thing
> > worse than an overly-long parameter list is one in which you cannot
> > (easily) tell which argument corresponds with which parameter, and
> > that's something this DIP would fix (by letting you name the
> > arguments so that they are self-documenting).  So your argument
> > doesn't really detract from this DIP.
> 
> Hopefully we don't make changes to the language in order to reduce the
> cost of bad programming practice. There's a real cost to encouraging
> long parameter lists, because while the "usual" case isn't so bad:
> 
> foo(x: 4, y: 8)
> 
> the case where you specify nine parameters is quite ugly, spilling
> onto multiple lines and making it hard to read.
[...]

But this:

	foo(x: 4, y: 8, z: 9,
		screen: scr1, widget: wg2,
		options: opts, menu: menu3);

is no worse than this:

	FooParams params;
	params.x = 4;
	params.y = 8;
	params.z = 9;
	params.screen = scr1;
	params.widget = wg2;
	params.options = opts;
	params.menu = menu3;
	foo(params);


T

-- 
Just because you survived after you did it, doesn't mean it wasn't stupid!