Bug #14700: Endless ranges don't seem to work properly with case statements

• Status: Rejected
• Assignee: -
• Target version: -
• ruby -v: ruby 2.6.0dev (2018-04-20 trunk 63199) [x86_64-darwin17]
• Backport: 2.3: UNKNOWN, 2.4: UNKNOWN, 2.5: UNKNOWN

[shan (Shannon Skipper)]

I'm running into an unexpected error with this code

case 1
when 0..
end
#!> SyntaxError: unexpected keyword_end, expecting keyword_then or ',' or ';' or '\n'

Thanks!

[mame (Yusuke Endoh)]

• Status changed from Open to Rejected

Please use parentheses, like when (0..). Unfortunately, it is difficult to allow this because it may cause a conflict with existing programs.

x = 1
case x
when 0..
  3
  p "#{ x } is in 0..3"
end