From: Xeno Campanoli <xeno@...>
Date: 2005-06-08T08:59:49+09:00
Subject: Re: Rescue just won't work for me on SuSE

Xeno Campanoli wrote:

> Ghislain Mary wrote:

Okay.  I got it.  The raise was repeating the error. 
xc

>
>> Hi,
>>
>> Xeno Campanoli a �crit :
>>
>>> I can't figure out Rescue.  I have the following:
>>>
>>>    rescue SystemCallError
>>>      print "parse failed on #{line}" + $!
>>>      raise
>>>    end
>>>
>>> and it doesn't compile:
>>>
>>> /validateMenuSpecs.rb:135: syntax error
>>>                        rescue SystemCallError
>>>                              ^
>>> ./validateMenuSpecs.rb:135: warning: useless use of a constant in 
>>> void context
>>> ./validateMenuSpecs.rb:173: syntax error
>>>
>>
>> You must have a context has the warning message tells you. So you 
>> must have something like
>>
>> begin
>>   # do something here
>> rescue SystemCallError
>>   print "parse failed on #{ line}" + $!
>>   raise
>> end
>
>
> I tried this:
>
> TargetsCategoriesFH.each_line do |line|
>    begin
>      target, catlist = line.chomp.strip.split(/\s*:\s*/)
>    rescue NoMethodError
>      #print "parse failed on #{line}" + $!
>      print "parse failed " + $!
>      raise
>    end
> .
> .
> .
> end
>
> and I get
>
> ./validateMenuSpecs.rb:152: private method `chomp' called for 
> nil:NilClass (NoMethodError)
>        from ./validateMenuSpecs.rb:132:in `each_line'
>        from ./validateMenuSpecs.rb:132
>
> with the rescue code commented out, I get:
>
> ./validateMenuSpecs.rb:153: private method `chomp' called for 
> nil:NilClass (NoMethodError)
>        from ./validateMenuSpecs.rb:132:in `each_line'
>        from ./validateMenuSpecs.rb:132
>
> Again.
>
>>
>> You should then put the code that you expect to get an exception from 
>> after the begin clause.
>>
>> HTH
>>
>> Ghislain
>>
>>
>>
>
>


-- 
Xeno Campanoli, xeno@eskimo.com, http://www.eskimo.com/~xeno
Pride before justice      equals destabilization.
Power before truth        equals destruction.
Profit before environment equals death.