[liblouis-liblouisxml] Re: context opcode and brailling dates
- From: "John J. Boyer" <johnjboyer@xxxxxxxxxxxxx>
- To: liblouis-liblouisxml@xxxxxxxxxxxxx
- Date: Wed, 24 Nov 2010 08:29:11 -0600
Bert,
Your understanding of the multipasss algorithm is correct. The
documentation can certainly be improved.
I am still investigatting the infinite loop that Christian reported a
while ago. It is caused by some sort of raare condition.
John
On Wed, Nov 24, 2010 at 03:10:01PM +0100, Bert Frees wrote:
> Maybe that multiple pairs of square brackets in a single expression are
> not allowed? Also, to me it was not entirely clear at first how text is
> evaluated with multipass expressions. I think the algorithm looks
> something like this (John, correct me if I'm wrong):
>
> * Begin with pass1 (context)
> START LOOP
> ** Match the text following the cursor against all expressions in the
> current pass
> ** If there is no match: shift the cursor one position to the right and
> CONTINUE loop
> ** If there is a match: choose the *longest match*
> ** Do the replacement (everything between square brackets)
> ** Place the cursor *after the replaced text*
> END LOOP
> * Go to pass2 and START LOOP
> * etc.
>
> I think this is not explained clear enough in the documentation.
>
> Bert
>
> On 24/11/2010 13:44, Christian Egli wrote:
> >Bert Frees<bert.frees@xxxxxxxxxxxxxxxx> writes:
> >
> >>Try this:
> >>
> >>swapcd digit 0123456789 245,1,12,14,145,15,124,1245,125,24
> >>context $d1-2["-"%digit1-2"-"]$d2-4 @3456%digit
> >Do you have any suggestions to improve the documentation?
> >
> >Thanks
> >
>
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