On 17/09/12 18:30, Danny Yoo wrote:
I have a trivial question but I desperately need a spare pair or eyes (or
another brain).
The 'when's here look really suspicious. You want control flow to go
exclusively to one or the other path, but when you have 'when' like
this:
... (when <test> <body>) <rest>
unless an exception occurs in the <test> or <body>, control flow will
inevitably go through <rest> as well. And I suspect you _don't_ want
that in your use in the snippet.
Even before trying your solution (which I am pretty sure it will ok),
let me ask you to confirm my suspicion.
Initially my idea was:
(when <cond>
<stmt>s
(loop (read-line in)))
<rest>
If <cond> is true, <rest> will never execute because we are looping with
read-line.
However, after your email I can see that after (loop (read-line in))
finishes <rest> is going to be executed. And this _has_ to be executed
unless there was a return or exception in the function, but since we are
in Racket and I am not playing with call/cc, <rest> will be executed no
matter what.
As you can see, I have been doing imperative languages for too long now.
Need to get back into racket. :)
Thanks,
--
PMatos
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