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<p>Hi Folks,<br>
<br>
Just tried Smalltalk-80 (actually Apple Smalltalk-80 running in Mini vMac).<br>
1e-3 "printIt" (1/1000)<br>
1e-3 class "printIt" Fraction<br>
1e3 "printIt" 1000<br>
1e3 class "printIt" SmallInteger<br>
<br>
This has always been the behavior in Squeak too.<br>
<br>
Also check these comments from Dan: http://lists.squeakfoundation.org/pipermail/squeak-dev/2000-March/013368.html<br>
<br>
I don't think this is a bug at all.<br>
BTW, Cuis also supports 1r111111111111 = 12 after this :)<br>
<br>
Cheers,<br>
Juan Vuletich<br>
<br>
Quoting Eliot Miranda <<a href="mailto:eliot.miranda@gmail.com">eliot.miranda@gmail.com</a>>:</p>
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<div class="gmail_extra"><br>
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<div class="gmail_quote">On Thu, Aug 7, 2014 at 9:05 AM, Levente Uzonyi <span dir="ltr"><<a href="mailto:leves@elte.hu" target="_blank">leves@elte.hu</a>></span> wrote:<br>
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<div>On Wed, 6 Aug 2014, Eliot Miranda wrote:<br>
<br>
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<p>Hi Levente,<br>
<br>
On Wed, Aug 6, 2014 at 11:43 AM, Levente Uzonyi <<a href="mailto:leves@elte.hu" target="_blank">leves@elte.hu</a>> wrote:<br>
On Wed, 6 Aug 2014, Eliot Miranda wrote:<br>
<br>
Hi All,<br>
Squeak trunk also suffers from the Float parsed as a Fraction bug:<br>
<br>
1e-8 class Fraction<br>
1.0e8 class Float<br>
<br>
<br>
I'm not entirely sure about it being a bug. I've checked Squeak 3.8 (pre-SqNumberParser), and it also parsed that literal as a Fraction. If I want a Float, I can be explicit and use 1.0e-8.<br>
<br>
<br>
IMO it very much *is* a bug. Smalltalk-80 has never supported Fraction literals. They're always written as division expressions. Fraction answers false to isLiteral. Just because it worked that way<br>
doesn't mean it was right. I suspect no one noticed. Allowing Fraction literals feels like a big change to me.</p>
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It's more like undefined behavior than a bug IMHO, though the lack of #isLiteral makes me think that the Fractions are not intentional. Interesting how Nicolas's SqNumberParser behaves the same way as the previous number parser in this case.
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<br>
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<p><br>
I made a modified version of Fraction >> #printOn:base: which outputs the literal format if possible. The change "fixes" the debugger (note that itw was way less broken in Squeak than in Pharo<br>
anyway).<br>
The only drawback I found is that some fractions become a bit more "complex" when printed, e.g. 3/4 => 75e-2<br>
<br>
<br>
OK, but is this the right fix? What does everybody think? Keep the language unchanged or add Fraction literals and add another incompatibility with other dialects?</p>
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I don't think that anyone ever used this "feature" before, so doing what other dialects do is probably the best way to resolve this.</blockquote>
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<div>Agreed. Smalltalk-80 v2 had no literal fractions. ObjectWorks and VisualWorks have never had literal fractions. I can't speak for other dialects, but I'm fairly sure none of the Smalltalk/V, Team/V lineage had literal Fractions either.</div>
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<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<p>If Fractions are literals<br>
- what is the semantics of 1/0 (easy, it is not a literal, but needs to be stated)?<br>
- what is [1/0.1] on: ZeroDivide do: [:ex| #error] ? Is it 10.0 or #error, i.e. is 1/0.1 10.0 or 1 / 0 followed by the Integer 1?</p>
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I did not propose to make all fractions literals. My implementation simply prints decimal fractions with the exponent notation, e.g. 3/4 is printed as 75-e2, but 2/3 is still printed as (2/3).<br>
<br>
<br>
<span class="HOEnZb"><font color="#888888">Levente</font></span>
<div class="HOEnZb">
<div class="h5"><br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<p> <br>
Levente<br>
--<br>
eek! Eliot<br>
<br>
--<br>
best,Eliot<br>
</p>
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--<br>
best,
<div>Eliot</div>
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