DateTime::Format::Builder::Parser::generic - Online Linux Manual PageSection : 3
Updated : 2022-01-21
Source : perl v5.34.0
Note : User Contributed Perl Documentation

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NAMEDateTime::Format::Builder::Parser::generic − Useful routines

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VERSIONversion 0.83

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METHODS

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Usefulnew 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

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Methods for subclassingThese 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.

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DelegationsFor 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(...) Instead we get to type: ​ $self−>valid_params(...); ​ _ _PACKAGE_ _−>valid_params(...);

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WRITING A SUBCLASSRather 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.

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SEE ALSO​datetime@perl.org mailing list. http://datetime.perl.org/ perl, DateTime, DateTime::Format::Builder, DateTime::Format::Builder::Parser.

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SUPPORTBugs may be submitted at <https://github.com/houseabsolute/DateTime−Format−Builder/issues>. I am also usually active on IRC as 'autarch' on irc://irc.perl.org.

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SOURCEThe source code repository for DateTime-Format-Builder can be found at <https://github.com/houseabsolute/DateTime−Format−Builder>.

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AUTHORS• Dave Rolsky <autarch@urth.org> • Iain Truskett <spoon@cpan.org>

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COPYRIGHT AND LICENSEThis software is Copyright (c) 2020 by Dave Rolsky. This is free software, licensed under: ​ The Artistic License 2.0 (GPL Compatible) The full text of the license can be found in the ​LICENSE file included with this distribution. 0

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