Suppose that I have two struct templates which take identical parameter lists:
struct Foo(T1, T2, T3)
{
...
}
struct Bar(T1, T2, T3)
{
...
}
Now suppose that I have a Foo which has been instantiated with a given set of
parameters. Is there any way for me to say, "now instantiate a Bar with the
same parameters?"
The use-case I'm thinking of is a function something like this (somewhat
pseudo-code-y):
auto fooToBar(FooInstance f)
{
Bar!(f.T1, f.T2, f.T3) b;
// set values etc.
return b;
}
Of course the f.T1 notation is my fiction, but it gives the idea of what is
needed -- is there a means to extract and use template parameters in this way?
I assume something from std.traits but it's not entirely clear what or how ...
