Bug #18246: send does not work for unary ! operator when operator isn't a literal symbol

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: 3.0.2
• Backport: 2.6: UNKNOWN, 2.7: UNKNOWN, 3.0: UNKNOWN

[chucke (Tiago Cardoso)]

1.send(:+, 1) #=> 2
1.send(:"+", 1) #=> 2
1.send(:-@) #=> -1
1.send(:"-@") #=> -1
false.send(:!@) #=> true
false.send(:"!@") #> 
# undefined method `!@' for false:FalseClass (NoMethodError)
# Did you mean?  !=
               !~

[jeremyevans0 (Jeremy Evans)]

• Is duplicate of Feature #10463: :~@ and :!@ are not parsed correctly added

[jeremyevans0 (Jeremy Evans)]

• Status changed from Open to Closed

The method you are looking for is ! and not !@. The reason false.send(:!@) works is that :!@ is parsed as :!, that's why the unquoted version works but the quoted version does not. This was determined to be a feature and not a bug in #10463.