How to fetch value pointed by a C++ std::list iterator?

[kaushalmodi]

@sls1005 I just tried out this, and that works too:
    
    
    proc `[]`*[T](it: ListIter[T]): T {.importcpp: "*#".}
    
    
    Run

  1. Changed `(*#)` to `*#`. What did the parentheses do?
  2. Removed `nodecl` pragma. I am not exactly clear what that did. Is there a 
scenario that will throw an error because that pragma wasn't added?