Hi LibLouis team,
May I suggest that Gary's email points to a need to update the documentation
and to make sure all opcodes and all parameters are accurately listed.
I know there are opcodes (such as seqdelimiter) which are completely missing
from the documentation, and there are parameters for some opcodes (such a %< in
match) which also are not documented.
Gary: the "3" you mention when back translating #aj3#jj is the raw input just
gone straight through to output. Dots 25 in USA computer coding is the ASCII 3.
Just a suggestion - and it might be a silly one - how about use the midnum
opcode to allow the colon?
e.g. in en-us-g1.ctb add:
midnum : 25
I hope this helps.
With best regards,
James.
-----Original Message-----
From: liblouis-liblouisxml-bounce@xxxxxxxxxxxxx
[mailto:liblouis-liblouisxml-bounce@xxxxxxxxxxxxx] On Behalf Of Gary Campbell
Sent: 14 October 2019 18:19
To: liblouis-liblouisxml@xxxxxxxxxxxxx
Subject: [liblouis-liblouisxml] Back translating times-- and using correct?
Hi,
When I try to back translate something like #aj3jj I get 10:jj instead
of 10:00. I tried to fix this with correct:
# Change letters following colon in times to digits.
swapcc timedigits abcdefghij 1234567890
nofor correct $d1-2":"[$l2] %timedigits
(I also tried upper case $D.) This seems to have no effect. Should it?
I'm trying to understand how to use the context/multipass/correct
patterns. (Maybe this should have been called "Questions about Correct"
or something.)
1. For purposes of ` and ~ what is "the string"? The line being processed?
2. The _ says that it "backs up 1 character". Does the processing model
have a "cursor"? I assume it scans the line character by character
looking for a place when the pattern matches similar to regular
expressions, and that [...] is like defining a regular expression group,
and that the result of the action replaces whatever is matched by the
patterns inside the brackets. Is that right?I would then assume that
the rule:
noback context $l["."]$l @256 U.S.
would scan until it matched "u.s" and replace the period in the
brackets with dots 256. However, the rule in en-us-g2.ctb is:
noback context _$l["."]$l @256 U.S.
Why is the _ needed?
3. I assume that "swapcc name abc 123" says to replace a with 1, b with
2, and c with 3. If I then use something like 'correct "abc" %name'
will the statement apply that operation to all 3 letters giving "123",
or is it going to operate only on the first character?
Thinking that I might be able to solve my problem by inserting a number
sign after the colon with pass2, I tried a back translation of #aj3#jj,
which produced "10310. Why was the "3" interpreted as a number in that
context? (I tried aj:#jj and it not surprisingly thought it was wh.)
I'm going to have the same problem with phone numbers.
Thanks.
Gary
For a description of the software, to download it and links to
project pages go to http://liblouis.org ;<http://liblouis.org>
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