ringabout

> it's not only optimizations - it significantly changes semantics because the shallow operation enables shared mutable instances (which semantically is problematic in general) which in turn changes the meaning...

see also https://github.com/nim-lang/Nim/issues/19555 https://github.com/nim-lang/Nim/issues/19564

ready for review

I'm checking https://github.com/nim-lang/Nim/issues/19806

Hi @markspanbroek. I tested the tests of question, all of them pass. I would like to add questionable to important packages in case of regression. However it is blocked by...

```nim for i in x .++ (if true: 12): collector.add i ``` if expr gives the same error like before: ``` Error: expression '12' is of type 'int literal(12)' and...

Sorry for the delay. My PR has the same problem as https://github.com/nim-lang/Nim/issues/8759 ([parser] a => counter+=1 parsed as (a => counter) += 1, violating the spec, and causing issues with...

@Menduist, Sorry for the inconveneience. I cannot think of a good solution. https://github.com/nim-lang/Nim/pull/19919 can be merged now which reverts enabling the experiemental feature, we can embrace dot-like method calls in...

Here is the progress of fixing important packages: https://github.com/nitely/nim-regex/pull/110

made a PR for arraymancer: https://github.com/mratsim/Arraymancer/pull/549