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Data::Section(3pm)    User Contributed Perl Documentation   Data::Section(3pm)

       Data::Section - read multiple hunks of data out of your DATA section

       version 0.200006

         package Letter::Resignation;
         use Data::Section -setup;

         sub quit {
           my ($class, $angry, %arg) = @_;

           my $template = $self->section_data(
             ($angry ? "angry_" : "professional_") . "letter"

           return fill_in($$template, \%arg);

         __[ angry_letter ]__
         Dear jerks,

           I quit!

         {{ $name }}
         __[ professional_letter ]__
         Dear {{ $boss }},

           I quit, jerks!

         {{ $name }}

       Data::Section provides an easy way to access multiple named chunks of
       line-oriented data in your module's DATA section.  It was written to
       allow modules to store their own templates, but probably has other

       You will need to use "__DATA__" sections and not "__END__" sections.
       Yes, it matters.  Who knew!

       To get the methods exported by Data::Section, you must import like

         use Data::Section -setup;

       Optional arguments may be given to Data::Section like this:

         use Data::Section -setup => { ... };

       Valid arguments are:

         encoding     - if given, gives the encoding needed to decode bytes in
                        data sections; default; UTF-8

                        the special value "bytes" will leave the bytes in the string

         inherit      - if true, allow packages to inherit the data of the packages
                        from which they inherit; default: true

         header_re    - if given, changes the regex used to find section headers
                        in the data section; it should leave the section name in $1

         default_name - if given, allows the first section to has no header and set
                        its name

       Three methods are exported by Data::Section:

         my $string_ref = $pkg->section_data($name);

       This method returns a reference to a string containing the data from
       the name section, either in the invocant's "DATA" section or in that of
       one of its ancestors.  (The ancestor must also derive from the class
       that imported Data::Section.)

       By default, named sections are delimited by lines that look like this:

         __[ name ]__

       You can use as many underscores as you want, and the space around the
       name is optional.  This pattern can be configured with the "header_re"
       option (see above).  If present, a single leading "\" is removed, so
       that sections can encode lines that look like section delimiters.

       When a line containing only "__END__" is reached, all processing of
       sections ends.

         my @names = $pkg->section_data_names;

       This returns a list of all the names that will be recognized by the
       "section_data" method.

         my $data = $pkg->merged_section_data;

       This method returns a hashref containing all the data extracted from
       the package data for all the classes from which the invocant inherits
       -- as long as those classes also inherit from the package into which
       Data::Section was imported.

       In other words, given this inheritance tree:

           B   C
            \ /

       ...if Data::Section was imported by A, then when D's
       "merged_section_data" is invoked, C's data section will not be
       considered.  (This prevents the read position of C's data handle from
       being altered unexpectedly.)

       The keys in the returned hashref are the section names, and the values
       are references to the strings extracted from the data sections.

         my @names = $pkg->merged_section_data_names;

       This returns a list of all the names that will be recognized by the
       "merged_section_data" method.

         my $data = $pkg->local_section_data;

       This method returns a hashref containing all the data extracted from
       the package on which the method was invoked.  If called on an object,
       it will operate on the package into which the object was blessed.

       This method needs to be used carefully, because it's weird.  It returns
       only the data for the package on which it was invoked.  If the package
       on which it was invoked has no data sections, it returns an empty

         my @names = $pkg->local_section_data_names;

       This returns a list of all the names that will be recognized by the
       "local_section_data" method.

   MooseX::Declare and namespace::autoclean
       The namespace::autoclean library automatically cleans foreign routines
       from a class, including those imported by Data::Section.

       MooseX::Declare does the same thing, and can also cause your "__DATA__"
       section to appear outside your class's package.

       These are easy to address.  The Sub::Exporter::ForMethods library
       provides an installer that will cause installed methods to appear to
       come from the class and avoid autocleaning.  Using an explicit
       "package" statement will keep the data section in the correct package.

          package Foo;

          use MooseX::Declare;
          class Foo {

            # Utility to tell Sub::Exporter modules to export methods.
            use Sub::Exporter::ForMethods qw( method_installer );

            # method_installer returns a sub.
            use Data::Section { installer => method_installer }, -setup;

            method my_method {
               my $content_ref = $self->section_data('SectionA');

               print $$content_ref;

          __[ SectionA ]__
          Hello, world.

       o   article for RJBS Advent 2009

       o   Inline::Files does something that is at first look similar,

           but it works with source filters, and contains the warning:

             It is possible that this module may overwrite the source code in files that
             use it. To protect yourself against this possibility, you are strongly
             advised to use the -backup option described in "Safety first".

           Enough said.

       Ricardo SIGNES <>

       This software is copyright (c) 2008 by Ricardo SIGNES.

       This is free software; you can redistribute it and/or modify it under
       the same terms as the Perl 5 programming language system itself.

perl v5.18.2                      2014-03-10                Data::Section(3pm)

Czas wygenerowania: 0.00012 sek.

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