On 07/28/2017 01:22 AM, Nicholas Wilson wrote:
Hi
I want to replace each occurrence of a particular type in an AliasSeq
with a type from another AliasSeq (the both have the same length) with
the corresponding index
i.e. (int long long float) (byte char double dchar) replacing long
should yield (int char double float) std.meta.Replace would see to do
the trick except the lambda depends in the index and I'm not sure how to
pass that.
No time to complete it but here is a busy syntax that may work:
template Replace(T) {
template From(Src...) {
template With(Dst...) {
pragma(msg, T);
pragma(msg, Src);
pragma(msg, Dst);
// Place holder, which needs to be implemented. :)
import std.meta : AliasSeq;
alias With = AliasSeq!int;
}
}
}
void main() {
Replace!long
.From!(int, long, long, float)
.With!(byte, char, double, dchar) a;
}
Ali
