Thank you, Jim, that's the sort of thing I was looking for. These are
EDI records. I wouldn't say the format wasn't designed for lexing and
parsing, exactly, but I am pretty sure they weren't designed with a
parser generator in mind.
I am going to read up on this @lexer::members{} thing.
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Jim Idle
Sent: Wednesday, December 09, 2009 3:57 PM
Cc: [email protected]
Subject: Re: [antlr-interest] "dynamic" whitespace?
It seems more likely that this record format was not designed for lexing
and parsing like this and whatever you do it will be a bit of a mess. I
think you just need a trivial program to 'parse' this. I suspect that
you have already spent more time the list than it would have done to
write the program ;-)
However I suspect that you are talking EDI records and I believe that I
already proposed one possible solution for that - nobody came back and
said if it works for EDI formats though. Use markmail search:
http://markmail.org/message/6g3qgvkwog24xep5
Jim
> -----Original Message-----
> From: [email protected] [mailto:antlr-interest-
> [email protected]] On Behalf Of Peter Boughton
> Sent: Wednesday, December 09, 2009 3:46 PM
> To: Skip Sailors
> Cc: [email protected]
> Subject: Re: [antlr-interest] "dynamic" whitespace?
>
> Well it doesn't necessarily have to be a traditional/printed character
> - maybe stuff in low ASCII or high Unicode ranges could be guaranteed
> not to appear?
>
> Alternatively, as Nick suggests, some form of escaping - e.g. prefix
> all non-delimiting delimiter characters with an escape character, for
> example backslash, and that way, you could safely escape everything
> (with original backslashes would be doubled up).
>
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