import std.stdio;

import std.variant;

​

alias Var = Algebraic!(int, long, double, string);

​

void main()

{

    Var[] vec = [Var(10), Var(15L), Var(1.5), Var("hello")];

    foreach (v; vec)

    {

        v.visit!(

            (arg)        => write(arg, ' '),

            (double arg) => writef("%f ", arg),

            (string arg) => writef(`"%s" `, arg),

        );

    }

}