From: ts <decoux@...>
Date: 2002-04-14T23:27:14+09:00
Subject: Re: statements &  expressions( was RE: not vs !, and vs && )

>>>>> "W" == Wladimir Mutel <mwg@fluffy.isd.dp.ua> writes:

W> 	Why it does not assign p to be Z in line 3 ? 

 1.6.7 give an error when you try to assign the return value of a void
 expression.

 1.7.2 give an error only for return, break, next, redo, retry and a
 warning for othercase 


pigeon% ruby -ve 'a = class A; self end; p a'
ruby 1.7.2 (2002-04-12) [i686-linux]
-e:1: warning: void value expression
-e:1: warning: void value expression
A
pigeon% 

pigeon% ruby -ve 'a = def a; 12 end; p a'
ruby 1.7.2 (2002-04-12) [i686-linux]
-e:1: warning: void value expression
-e:1: warning: void value expression
nil
pigeon% 

pigeon% ruby -ve 'while true; a = break; end'
ruby 1.7.2 (2002-04-12) [i686-linux]
-e:1: void value expression
while true; a = break; end
                      ^
-e:1: void value expression
while true; a = break; end
                      ^
pigeon% 


Guy Decoux