NAME
DateTime::Format::Builder::Parser::generic - Useful routines
METHODS
Useful
new
Standard constructor. Returns a blessed hash; any arguments are placed in the hash. This is useful for storing information between methods.
generic_parser
This is a method provided solely for the benefit of Parser implementations. It semi-neatly abstracts a lot of the work involved.
Basically, it takes parameters matching the assorted callbacks from the parser declarations and makes a coderef out of it all.
Currently recognized callbacks are:
on_match
on_fail
preprocess
postprocess
Methods for subclassing
These are methods you should define when writing your own subclass.
Note: these methods do not exist in this class. There is no point trying to call $self->SUPER::do_match( ... ).
do_match
do_match is the first phase. Arguments are the date and @args. self, label, args. Return value must be defined if you match successfully.
post_match
post_match is called after the appropriate callback out of on_match/on_fail is done. It's passed the date, the return value from do_match and the parsing hash.
Its return value is used as the post argument to the postprocess callback, and as the second argument to make.
make
make takes the original input, the return value from post_match and the parsing hash and should return a DateTime object or undefined.
Delegations
For use of Parser, this module also delegates valid_params and params. This is just convenience to save typing the following:
DateTime::Format::Builder::Parser->valid_params( blah )Instead we get to type:
$self->valid_params( blah );
__PACKAGE__->valid_params( blah );WRITING A SUBCLASS
Rather than attempt to explain how it all works, I think it's best if you take a look at Regex.pm and Strptime.pm as examples and work from there.
THANKS
See DateTime::Format::Builder.
SUPPORT
Support for this module is provided via the datetime@perl.org email list. See http://lists.perl.org/ for more details.
Alternatively, log them via the CPAN RT system via the web or email:
http://perl.dellah.org/rt/dtbuilder
bug-datetime-format-builder@rt.cpan.orgThis makes it much easier for me to track things and thus means your problem is less likely to be neglected.
LICENSE AND COPYRIGHT
Copyright © Iain Truskett, 2003. All rights reserved.
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
The full text of the licenses can be found in the Artistic and COPYING files included with this module.
AUTHOR
Iain Truskett <spoon@cpan.org>
SEE ALSO
datetime@perl.org mailing list.
http://datetime.perl.org/
perl, DateTime, DateTime::Format::Builder, DateTime::Format::Builder::Parser.