Hm… Interesting. I don’t see refactorings provided for either actually, but I do see what you mean about the AST structure there. I imagine something could be done for operators specifically which is the only place you’d have this problem, but it may not be worth the effort to make it work.
Specifically, the associativity of the operators is known, and so before attempting to provide a refactoring you could attempt to rewrite nested operator calls in some equivalent way to cover the range. Like in this case
+
|- +
| |- x
| \- y
\- z
is equivalent to
+
|- +
| |- x
| \- +
| | y
| | z
The interesting thing (and I’m actually surprised the Elixir formatter doesn’t step in here to solve this ambiguity, @josevalim)
If you were to highlight y - z in x - y - z you definitely could not extract y - z into a variable as it would actually change the outcome of that statement. I’m pretty surprised that the formatter doesn’t turn x - y - z into (x - y) - z automatically, because then selecting y) - z would not even appear to be something you could refactor.
