"g g" <g...@g.com> wrote in message news:ii5mtb$12qv$1...@digitalmars.com...
> IDK where to put this.
>
> first thing:
> Could it be a way to collapse Variants in std.variant?, like
> Variant x = Variant(1)
> Variant y = Variant([x,x,x,x])
> //y could be simplified to Variant(int[]) instead of
> Variant(Variant(int)[])
> //now it is not implemented (as far i know)
>
The problem with that is that x is only an int at runtime. It's the same
problem as this:
Variant x = Variant(1);
int z = x; // ERROR: x might not be an int.
You have to do it like this:
Variant x = Variant(1);
if(x.convertsTo!int())
{
int z = x.coerce!int();
}
else
// Do something else
Or you skip the "if(x.convertsTo!int())" part if you expect that x should
always be an int. If it ever isn't an int then coerce will throw an
exception.
So if you want y to be Variant(int[]), you need to do:
Variant x = Variant(1);
if(x.convertsTo!int())
{
auto xInt = x.coerce!int();
Variant y = Variant([xInt,xInt,xInt,xInt]);
}
else
// Do something else
