On Tuesday, 4 September 2012 at 19:18:05 UTC, Jacob Carlborg
wrote:
I've also wished quite many times I had dynamic typing in D.
I think we're *fairly* close with things like std.variant,
especially combined with some helpers. Take a look:
Variant a = 10;
string b = a; // can't, and I say that's good, usually
b = a.coerce!string; // works
But, to get a dynamic feel, you don't want to write
out coerce!type. I kinda want it to be auto. So,
Variant a = 10;
string b;
b.dset = a; // dset means dynamic set
This is pretty doable in D today.
auto dset(T, U)(ref T t, U u) {
return t = to!T(u);
}
Then call with UFCS + property getter syntax.
The other thing is to do function calls. And we might
be able to pull that off too with something like
void foo(string a, string b) {}
auto dcall(alias func, T...)(T args) {
import std.traits;
ParameterTypeTuple!func typedArgs;
foreach(i, ref arg; typedArgs)
arg.dset = args[i];
return func(typedArgs);
}
dcall!foo(a, b);
Thus your user code is pretty type-agnostic, with loose
types when requested.
