How auto convert Variant to required function arguments?

[Ferhat Kurtulmuş]

On Friday, 9 October 2020 at 15:49:31 UTC, Ferhat Kurtulmuş wrote:
> On Friday, 9 October 2020 at 00:19:20 UTC, Marcone wrote:
>> How auto convert Variant to required function arguments?
>
>
> import std.variant;
> import std.stdio;
>
> Variant a;
>
> int mul2(Variant b){
>     int c = *b.peek!(int);
>     return 2*c;
> }
>
> int mul3(int b){
>     return 3*b;
> }
>
> void main()
> {
>     a = 5;
>     writeln(mul2(a));
>
>     Variant b = 3;
>     writeln(mul3(*b.peek!int));
> }
Uh, probably this is not what you want. I found this thread: 
https://forum.dlang.org/thread/ebylgcrslkelgrvntjws@forum.dlang.org

You man need to use Algebraic.