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From: Jonathan Theodore Mayer <jtmayer@HIDDEN>
Date: Wed, 14 Sep 2016 17:56:55 -0700
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Content preview: The lowest and highest exponent that do not result in an
error
for string->number are -324 and 308, respectively. I am running Guile 2.0.9.
The lowest and highest exponent that do not result in an error for
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Content preview: The lowest and highest exponent that do not result in an error
for string->number are -324 and 308, respectively. I am running Guile 2.0.9.
The lowest and highest exponent that do not result in an error for string->number
are -324 and 308, respectively. I am running Guile 2.0.9. [...]
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--001a1147d53674220a053c81521a
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The lowest and highest exponent that do not result in an error for
string->number are -324 and 308, respectively. I am running Guile 2.0.9.
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<div dir="ltr">The lowest and highest exponent that do not result in an error for string->number are -324 and 308, respectively. I am running Guile 2.0.9.</div>
--001a1147d53674220a053c81521a--
bug-guile@HIDDEN:bug#18932; Package guile.
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From: Anand Mohanadoss <anand108@HIDDEN>
Date: Mon, 8 Aug 2016 18:04:45 +0530
Message-ID: <CAFNjtaD8DESceh0ZMEBWb=9PqUhNG_onk8ycb8EL-6eDaQJaNA@HIDDEN>
Subject: symbol printing problem
To: guile-user@HIDDEN
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Hi,
We observed the following with guile 2.0.11 -
scheme@(guile-user)> (define sym '912828S7912810RS)
While reading expression:
ERROR: In procedure string->number: Value out of range: 7912810
Is this expected? Do we need to enable any read-options? If this is
expected, it appears that if we are creating symbols from random data, we
need to do a symbol->string before printing it. Is this the recommendation
or should we do something else?
Thank you!
Anand
bug-guile@HIDDEN:bug#18932; Package guile.
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Subject: Re: #18932 string->number errors on e.g. "1e400xyz"
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Content preview: Note that guile 2.0.11 also gives strange results for large
negative exponents: scheme@(guile-user)> (string->number "1e-400")ERROR:
In procedure string->number:ERROR: In procedure string->number: Value out
of range: -400 Â For comparison, in Scheme 48 1.9 (string->number "1e-400")
=> 0.0 (string->number "1e400") => +inf.0 (string->number "1e400xyz") =>
#f [...]
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Content preview: Note that guile 2.0.11 also gives strange results for large
negative exponents: scheme@(guile-user)> (string->number "1e-400")ERROR:
In procedure string->number:ERROR: In procedure string->number: Value out
of range: -400 Â For comparison, in Scheme 48 1.9 (string->number "1e-400")
=> 0.0 (string->number "1e400") => +inf.0 (string->number "1e400xyz") =>
#f [...]
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--b1_d476e7779d5a41caf4d791d607175acd
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Note that guile 2.0.11 also gives strange results for large negative expone=
nts:
scheme@(guile-user)> (string->number "1e-400")ERROR: In procedure string->n=
umber:ERROR: In procedure string->number: Value out of range: -400
=C2=A0
For comparison, in Scheme 48 1.9
(string->number "1e-400") =3D> 0.0
(string->number "1e400") =3D> +inf.0
(string->number "1e400xyz") =3D> #f
--b1_d476e7779d5a41caf4d791d607175acd
Content-Type: text/html; charset=UTF-8
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<p>Note that guile 2.0.11 also gives strange results for large negative exp=
onents:</p>
<p>scheme@(guile-user)> (string->number "1e-400")<br />ERROR: In proc=
edure string->number:<br />ERROR: In procedure string->number: Value =
out of range: -400</p>
<p> </p>
<p>For comparison, in Scheme 48 1.9</p>
<p>(string->number "1e-400") =3D> 0.0</p>
<p>(string->number "1e400") =3D> +inf.0</p>
<p>(string->number "1e400xyz") =3D> #f</p>
--b1_d476e7779d5a41caf4d791d607175acd--
bug-guile@HIDDEN:bug#18932; Package guile.
Full text available.
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Date: Mon, 03 Nov 2014 10:20:58 +0100
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From: taylanbayirli@HIDDEN ("Taylan Ulrich =?utf-8?Q?Bay=C4=B1rl=C4=B1?=
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To: bug-guile@HIDDEN
Subject: string->number errors on e.g. "1e400xyz"
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When string->number is given a number in scientific notation with a
very high exponent, it errors with "value out of range."
I don't know if that is acceptable, but what seems unacceptable is
that it errors even if the string contains further characters and is
thus not a valid number; R5RS says that #f should be returned when the
string does not contain a syntactically valid number, and R7RS adds
explicitly that string->number never signals an error due to the
contents of the given string.
Apparently MIT/GNU Scheme has the same bug, as reported by 'ecraven'
on #scheme. From other systems I tested, Racket, Gauche, Gambit, and
Chibi return +inf.0 for numbers with a too high exponent; I'm told
Chicken also does so when the "numbers egg" is loaded.
Taylan
taylanbayirli@HIDDEN ("Taylan Ulrich Bayırlı/Kammer"):bug-guile@HIDDEN.
Full text available.bug-guile@HIDDEN:bug#18932; Package guile.
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