variadic args

[Aarti_pl]

novice2 napisał(a):
> many thanks, Jarrett Billingsley.
> i don't like templates, so you solution good.
> i hope, Walter will add support for this in language,
> and such ugly construction will gone from sources in future.

You can try with Any ported to D. It allows quite nice solution for 
variadic arguments:

void printVector(Any[] vec) {
	// printing vector of different type arguments
	// see Any description and code; eventually boost any 	
	// documentation
}

void printVariadic(Any[] var...) {
	printVector(var);
}

void main() {

	Any[] vec;

	vec~=(new Any).assign(6);
	vec~=(new Any).assign("Text"[]);
	vec~=(new Any).assign(5.5);

	printVector(vec);

	auto v = new Any;
	auto z = new Any;
	v.assign(2.5);
	z.assign("Another text"[]);

	printVariadic(v, z);

}


I will send at the end of week updated version of Any, which supports 
new opAssign() overloaded operator, so it will be possible:

	v=2.5;
instead of
	v.assign(2.5);

Using Any you do not have to use va_list, TypeInfo, pointers etc. It's 
just redundant then...

I just would wish myself that Walter will add support for templatized 
constructors to achieve following:
	# printVariadic(new Any(4), new Any("Yet another text"[]), new 
Any(3.14)); // it doesn't work now...

Best Regards
Marcin Kuszczak