Re: [emacs-bidi] Where do I start?

[Alex Schroeder]

"Eli Zaretskii" <address@hidden> writes:

>   http://crl.NMSU.Edu/~mleisher/ucdata.html

I am looking at the following problem right now:

(bidi-logical-to-visual "SOLVE 1*5 1-5 1/5 1+5")

  => "1+5 1/5 1-5 5*1 EVLOS"

I don't understand why the Unicode Reference Code is giving a
different result.  Note that FriBidi returns the same result as my
implementation.

|Test|   Source String    | Unicode Reference  |   FriBidi 0.1.9    |
|    |                    |        Code        |                    |
+----+--------------------+--------------------+--------------------+
|  14|SOLVE 1*5 1-5 1/5   |     5+1 5/1 5-1 5*1|     1+5 1/5 1-5 5*1|
|    |1+5                 |               EVLOS|               EVLOS|

It seems that / - + are treated the same as *.  How can that be?

(bidi-get-mnemonics
 (bidi-get-types "*/+-"))

  => (ON ES ET ET)

According to W4 and W5 / + and - should turn into EN when present
between or adjacent to EN as in the test string.  Any opinions?

Here are the bidi types before and after resolving weak types:

(bidi-get-mnemonics
 (bidi-get-types "SOLVE 1*5 1-5 1/5 1+5"))

  => (R R R R R WS EN ON EN WS EN ET EN WS EN ES EN WS EN ET EN)

(bidi-get-mnemonics
 (bidi-resolve-weak-types
  (bidi-get-types "SOLVE 1*5 1-5 1/5 1+5")))

  => (R R R R R R EN R EN R EN EN EN R EN EN EN R EN EN EN)
                     *         *          *          *

Alex.
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