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From: proton on 29 Jun 2010 05:54
Hi all,

I am trying to read a text file using read-line within a loop.
In the file there is a line with one single word followed by a colon,
"follows:".
When the program reaches that line, instead of processing it as the
rest, it takes it as the definition of a package. Then, the next line
it returns an error "Unknown follows: package".

Is there a way to prevent this and treat the line with the colon as a
normal string?

I am using CLISP 2.47 on Win32.

Thanks for your help.
From: Tamas K Papp on 29 Jun 2010 07:11
On Tue, 29 Jun 2010 02:54:13 -0700, proton wrote:

> Hi all,
>
> I am trying to read a text file using read-line within a loop. In the
> file there is a line with one single word followed by a colon,
> "follows:".
> When the program reaches that line, instead of processing it as the
> rest, it takes it as the definition of a package. Then, the next line it
> returns an error "Unknown follows: package".

If you are using just read-line in a loop, then I find that behavior
surprising, as readline does no parsing (other than detecting newlines).

> Is there a way to prevent this and treat the line with the colon as a
> normal string?

Maybe you should post the code so we could see what's going on.

Tamas
From: Teemu Likonen on 29 Jun 2010 07:24
* 2010-06-29 02:54 (-0700), proton wrote:

> I am trying to read a text file using read-line within a loop.
> In the file there is a line with one single word followed by a colon,
> "follows:".
> When the program reaches that line, instead of processing it as the
> rest, it takes it as the definition of a package. Then, the next line
> it returns an error "Unknown follows: package".
>
> Is there a way to prevent this and treat the line with the colon as a
> normal string?

That shouldn't happen in the first place.

(with-input-from-string
(s (format nil "first line~%follows:~%third line"))
(values
(read-line s)
(read-line s)
(read-line s)))

=> "first line", "follows:", "third line"

I think you are actually using something like READ-FROM-STRING which
uses the Lisp reader to parse the strings.
From: proton on 29 Jun 2010 08:47
My apologies, I forgot to mention that after a read-line, I do a read-
from-string. That´s where the error occurs.

On Jun 29, 1:11 pm, Tamas K Papp <tkp...(a)gmail.com> wrote:
> On Tue, 29 Jun 2010 02:54:13 -0700, proton wrote:
> > Hi all,
>
> > I am trying to read a text file using read-line within a loop. In the
> > file there is a line with one single word followed by a colon,
> > "follows:".
> > When the program reaches that line, instead of processing it as the
> > rest, it takes it as the definition of a package. Then, the next line it
> > returns an error "Unknown follows: package".
>
> If you are using just read-line in a loop, then I find that behavior
> surprising, as readline does no parsing (other than detecting newlines).
>
> > Is there a way to prevent this and treat the line with the colon as a
> > normal string?
>
> Maybe you should post the code so we could see what's going on.
>
> Tamas

From: Pascal J. Bourguignon on 29 Jun 2010 10:20
proton <leosarasua(a)gmail.com> writes:

> On Jun 29, 1:11�pm, Tamas K Papp <tkp...(a)gmail.com> wrote:
>> On Tue, 29 Jun 2010 02:54:13 -0700, proton wrote:
>> > Hi all,
>>
>> > I am trying to read a text file using read-line within a loop. In the
>> > file there is a line with one single word followed by a colon,
>> > "follows:".
>> > When the program reaches that line, instead of processing it as the
>> > rest, it takes it as the definition of a package. Then, the next line it
>> > returns an error "Unknown follows: package".
>>
>> If you are using just read-line in a loop, then I find that behavior
>> surprising, as readline does no parsing (other than detecting newlines).
>>
>> > Is there a way to prevent this and treat the line with the colon as a
>> > normal string?
>>
>> Maybe you should post the code so we could see what's going on.
>
> My apologies, I forgot to mention that after a read-line, I do a read-
> from-string. That�s where the error occurs.

What would you expect then?


Why would you want to use READ-FROM-STRING, if your string doesn't
contain a lisp form?



--
A: Because it messes up the order in which people normally read text.
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A: Top-posting.
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__Pascal Bourguignon__ http://www.informatimago.com/
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