Explicitly saying ref or out when invoking a function

[Nick Sabalausky]

"Ary Borenszweig" <ary at esperanto.org.ar> wrote in message 
news:h5s3e9$2kml$1 at digitalmars.com...
> In C# when you define a function that takes an out or ref parameter, when 
> invoking that function you must also specify ref or out. For example:
>
> void fun(ref uint x, double y);
>
> uint a = 1;
> double b = 2;
> fun(ref a, b);
>
> When I first started using C# it really annoyed me that I had to put that 
> keyword there just to get my program compiled. "I know what I'm doing", I 
> thought. But later, when reading the code, I found it very helpful to know 
> that my "a" could be changed when invoking "fun". As always, code is read 
> much more times than written, and I think this little tips help better 
> understand the code.
>
> What do you think?

That's something I've always liked about C# and always wanted in D. 
Although, what some people have said about just coloring it in an editor is 
not a bad point (althogh it seems like we may be starting to run out of 
colors...).