https://issues.dlang.org/show_bug.cgi?id=13571
monkeywork...@hotmail.com changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |WONTFIX --- Comment #1 from monkeywork...@hotmail.com --- I tried adding support for opCall to tee, and I ran into some problems. As you can just pass the struct/object with opCall to the overload of tee that takes an output range as a function argument, the extra complexity that's necessary to support taking structs/objects with opCall as a template argument is not worth it IMO. Therefore, I'm going to close this. --