Re: Function accepting variadic arguments

[Daniel Kozak via Digitalmars-d-learn]

V Wed, 20 Jan 2016 12:38:20 +0000
pineapple via Digitalmars-d-learn <digitalmars-d-learn@puremagic.com>
napsáno:

> I'd like to make a constructor which takes a variable list of 
> arguments, of a short list of possible types, with different 
> handling depending on the type. I haven't been able to find any 
> documentation or examples that did quite what I'm trying to. Help?
> 
> A fun pseudocode example of what I'm trying to do:
> 
> this(...){
>      foreach(argument){
>          if(argument is a number){
>              do stuff with it;
>          }else if(argument is of type A){
>              do other stuff;
>          }else if(argument is of type B){
>              yet more stuff;
>          }
>      }
> }
> 

import std.stdio;

struct S
{
    this(Args...)(Args args)
    {
        foreach(Type, Value;args)
        {
            writefln("Type: %s value: %s", Args[Type].stringof, Value);
        }
    }
}

void main()
{
    auto s = S(1, "string");
}