[racket] raise-ing an exception inside prompt

That's beyond me but displayln orders 'events' better here. 


On Dec 22, 2010, at 12:28 PM, Keiko Nakata wrote:

> I'm not sure if I got your point, as I seem to have the same result 
> after replacing with displayln. 
> 
> My concern is why I get a type error only for the latter?
> (And how I could get both the exception and type error?)
> 
> Keiko
> 
> 
> From: Matthias Felleisen <matthias at ccs.neu.edu>
> Subject: Re: [racket] raise-ing an exception inside prompt
> Date: Wed, 22 Dec 2010 12:15:21 -0500
> 
>> 
>> Replace print with displayln. (You're buffering the output but it isn't displayed until the repl prints the next prompt.) 
>> 
>> 
>> On Dec 22, 2010, at 11:56 AM, Keiko Nakata wrote:
>> 
>>> Hello,
>>> 
>>> How should I understand this behavior?
>>> 
>>> (with-handlers ([(lambda (_) #t) (lambda (_) (print "exit"))])
>>> (print (+ (prompt (print "hi") (raise 3) (print "bye")) 10)))
>>> 
>>> prints "hi" then "exit", whereas
>>> 
>>> (+ (prompt (print "hi") (raise 3) (print "bye")) 10)
>>> 
>>> prints "hi", then I got an uncaught exception, followed by type error
>>> of adding <void> and 10.
>>> 
>>> Btw, where can I find the source code around exceptions, 
>>> e.g., raise and with-handlers?
>>> 
>>> Thanks,
>>> Keiko
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>> 
>>