Silence warning when conditional assignments are wrapped in parentheses
Sometime it's convenient to have an assignment in an
if-condition. The Ruby documentation even contains an example showing this "most common use of side-effect" practice:
if a = object.some_value # do something to a end
Running that code however results in a warning:
warning: found = in conditional, should be ==
It's very unfortunate that the Ruby docs contain example code that the parser complains about. And it's unfortunate that we can't make use of conditional assignments without getting warnings or turning off warnings.
I propose an obvious change to the current warning mechanism:
Don't show the warning when the assignment is wrapped in parentheses.
if a = object.some_value # warning end if (a = object.some_value) # no warning end
This is the way RoboCop already works and it's also a known workaround from other languages.
It would also allow the documentation to contain a warning-free example.