How to preserve function parameters scopeness

[Mike Franklin]

On Thursday, 6 June 2019 at 09:45:08 UTC, Ivan Butygin wrote:
> I want to extract function parameters types from declaration, 
> remove some of them and construct new function pointer type 
> from remaining types. Doing this in obvious way cause
> parameters to lost their scope storage class: 
> https://run.dlang.io/is/cQBFRW

I don't understand your example that well, but are you perhaps 
encountering this issue? 
https://forum.dlang.org/post/yixvtosbkuphnvxydtxr@forum.dlang.org