Re: [Jscheme-user] string->number problem

[Ken A. <kan...@bb...>]

OK, we can keep with Java litterals, but (string->number) should convert according to radix.  Can you fix that?  It's getting in the way of a release.

k

At 11:04 AM 5/28/2004 -0400, Timothy John Hickey wrote:

>On May 28, 2004, at 10:44 AM, Ken Anderson wrote:
>
>>Now we can't parse a number with a leading "0" even if we say base 10.
>>>(string->number "08")
>>#f
>>>(string->number "08" 10)
>This is clearly not good. I'll fix it!
>
>>#f
>>>(string->number "8" 10)
>>8
>
>
>
>>
>>Can we make this base 8 stuff optional?
>We can back out these changes for now if it is causing backward compatibility problems....
>
>> Usually when i see a leading 0 in data it is expecting to be interpreted as base 10.  For example May is month "05".
>We could go back to the original interpretation and have 08 be converted to 8.0....
>
>The problem here is that a program can contain
>    0100
>and we wouldn't know whether they meant that in base 8 or base 10.
>The only time a leading zero number would be base 10 is if it happens to contain an 8 or 9,
>this seems like it could generate hard to catch bugs!
>
>One nice thing we've done with Jscheme is have the literal syntax be almost exactly the same
>as Java literal syntax. This makes it easy for Java programmers (and easy for us as we don't have
>to write a special manual about the syntax of literals).
>
>We also have a Scheme literal mode
>  (set! jsint.U.useJavaMode #f)
>which turns off the Java literal mode ....
>
>For now, we could have a backward compatibility switch that reverts to the old style,
>but I think for the future it will be easier for us if we stick to pure Java literal syntax..
>
>>
>>k
>>
>>
>>
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