Hi Yoshiki,

Thanks for the feedback and it is great to hear that SISS will be released.

I've fixed the Fraction reading problem in SIXX. http://squeaksource.blueplane.jp/SIXX/SIXX-mu.83.mcz

For Complex numbers, I confirmed the current SIXX format works both in Squeak and VW. But it would be better to use a normal string representation like '2 + 3i'.

And I've also found ScaledDecimal has its own problems (VW uses FixedPoint instead of ScaledDecila; 123s is not allowed in Squeak, etc.).

These fixes will be applied to the next version of SIXX.

Regards,

2007/5/3, Yoshiki Ohshima yoshiki@squeakland.org:

Hello,

I did a little experiment with SIXX 0.2b (thank you, Umezawa-san!) and found a few problems around Fraction, and also more lower-level problem with storeString/readFrom: pair on Fraction and Complex.

First, the following raises either ends up with an error (in a 3.8 based image) or wrong result (in 3.9):

Fraction readFromString: (10/11) storeString. "or Number readFromString: (10/11) storeString."

writing and reading via SIXX doesn't work.

For a Complex number, SIXX work because it scans the internal structure of the number, but still the following doesn't work:

Fraction readFromString: (1+2i) storeString.

The following:

Object readFromString: (10/11) storeString.

works, but I'd rather avoid using #evaluate: (I think there was some discussion around it before) to read an interchangeable file.

Any thoughts?

(BTW, I'm writing a "variant" of SIXX called SISS, that files out objects in S-expressions. Other than the syntax, SISS produces more "flat"-structured elements to help post processing and analysis. That is (getting) available in the OLPC image so please take a look at it if you're interested in.)

-- Yoshiki

Hi Vladimir,

Thanks for the report. Actually, this problem is related to XML parser's normalization. (Surrounding white spaces should be trimmed by default according to XML spec).

However, you can avoid this problem by setting: "SixxSettings useCDATA: true."

Another solution is to fix SIXX to add "xml:space="preserve'"" for each XML tag, but currently YAXO does not handle this attribute.

Cheers,

2007/7/25, Vladimir Janousek janousek@fit.vutbr.cz:

Dear Masahi,

I have encountered a bug: SIXX eats leading spaces in string and symbol literals:

(Object readSixxFrom: #' aaa' sixxString) == #' aaa' --> false (Object readSixxFrom: ' aaa' sixxString) = ' aaa' --> false

Vladimir Janousek