Jason Foreman wrote:
> On 6/20/05, Florian Gro<florgro / gmail.com> wrote:
>> Jason Foreman wrote:
>>
>>> If you accidentally write x = 1 instead of x == 1, it can take a
>>> long time to figure out your bug.
>>
>> C:\Dokumente und Einstellungen\flgr>ruby
>> foo = 10
>> if foo = 10 then
>>    puts "Hello World!"
>> end
>> -:2: warning: found = in conditional, should be ==
>> ^Z
>> Hello World!
>>
>> I found out about my bug before I was even done giving Ruby the full
>> application code. ;)
>>
>>
>>
>
> Nice.  I didn't realize it gave that warning!  :)
>
> However:
>
> $ ruby
> x=2
> case x
>   when x=1:  p 'one'
>   when x==2: p 'two'
>   else p 'whoops!'
> end
> ^D
> "whoops!"

Do you suggest to add a warning if there is an expression after "case"
*and* at least a single boolean expression after "when"?  Note that the
correct form of what you did is this:

x=2
case
  when x==1:  p 'one'
  when x==2: p 'two'
  else p 'whoops!'
end

Kind regards

    robert