On Friday, 23 August 2013 at 19:57:42 UTC, Leandro Motta Barros wrote:

Hello!

Is it possible to make an InExpression work with a used-defined type?

struct MyCollection { ... }

MyCollection mc;

auto p = 123 in mc;
if (p) { ... }

Thanks!

LMB

Yes, use opBinaryRight:

T* opBinaryRight(stirng op : "in")(...)