Provided by: libexport-attrs-perl_0.1.0-1_all bug


       Export::Attrs - The Perl 6 'is export(...)' trait as a Perl 5 attribute


       This document describes Export::Attrs version v0.1.0


           package Some::Module;
           use Export::Attrs;

           # Export &foo by default, when explicitly requested,
           # or when the ':ALL' export set is requested...

           sub foo :Export(:DEFAULT) {
               print "phooo!";

           # Export &var by default, when explicitly requested,
           # or when the ':bees', ':pubs', or ':ALL' export set is requested...
           # the parens after 'is export' are like the parens of a qw(...)

           sub bar :Export(:DEFAULT :bees :pubs) {
               print "baaa!";

           # Export &baz when explicitly requested
           # or when the ':bees' or ':ALL' export set is requested...

           sub baz :Export(:bees) {
               print "baassss!";

           # Always export &qux
           # (no matter what else is explicitly or implicitly requested)

           sub qux :Export(:MANDATORY) {
               print "quuuuuuuuux!";

           # Allow the constant $PI to be exported when requested...

           use Readonly;
           Readonly our $PI :Export => 355/113;

           # Allow the variable $EPSILON to be always exported...

           our $EPSILON :Export( :MANDATORY ) = 0.00001;

           sub IMPORT {
               # This subroutine is called when the module is used (as usual),
               # but it is called after any export requests have been handled.


       NOTE: This module is a fork of Perl6::Export::Attrs created to restore compatibility with
       Perl6::Export::Attrs version 0.0.3.

       Implements a Perl 5 native version of what the Perl 6 symbol export mechanism will look
       like (with some unavoidable restrictions).

       It's very straightforward:

       ·   If you want a subroutine or package variable to be capable of being exported (when
           explicitly requested in the "use" arguments), you mark it with the ":Export"

       ·   If you want a subroutine or package variable to be automatically exported when the
           module is used (without specific overriding arguments), you mark it with the
           ":Export(:DEFAULT)" attribute.

       ·   If you want a subroutine or package variable to be automatically exported when the
           module is used (even if the user specifies overriding arguments), you mark it with the
           ":Export(:MANDATORY)" attribute.

       ·   If the subroutine or package variable should also be exported when particular export
           groups are requested, you add the names of those export groups to the attribute's
           argument list.

       That's it.

   "IMPORT" blocks
       Perl 6 replaces the "import" subroutine with an "IMPORT" block. It's analogous to a
       "BEGIN" or "END" block, except that it's executed every time the corresponding module is

       The "IMPORT" block is passed the argument list that was specified on the "use" line that
       loaded the corresponding module, minus the arguments that were used to specify exports.

       Note that, due to limitations in Perl 5, the "IMPORT" block provided by this module must
       be terminated by a semi-colon, unless it is the last statement in the file.


       %s does not export: %s\nuse %s failed
           You tried to import the specified subroutine or package variable, but the module
           didn't export it. Often caused by a misspelling, or forgetting to add an ":Export"
           attribute to the definition of the subroutine or variable in question.

       Bad tagset in :Export attribute at %s line %s: [%s]
           You tried to import a collection of items via a tagset, but the module didn't export
           any subroutines under that tagset. Is the tagset name misspelled (maybe you forgot the

       Can't export lexical %s variable at %s
           The module can only export package variables. You applied the ":Export" marker to a
           non-package variable (almost certainly to a lexical). Change the variable's "my"
           declarator to an "our".

       Can't export anonymous subroutine at %s
           Although you can apply the ":Export" marker to an anonymous subroutine, it rarely
           makes any sense to do so, since that subroutine can't be exported without a name to
           export it as. Either give the subroutine a name, or make sure it's aliased to a named
           typeglob at compile-time (or, at least, before it's exported).


       Export::Attrs requires no configuration files or environment variables.


       This module requires the Attribute::Handlers module to handle the attributes.


       This module cannot be used with the Memoize CPAN module, because memoization replaces the
       original subroutine with a wrapper. Because the ":Export" attribute is applied to the
       original (not the wrapper), the memoized wrapper is not found by the exporter mechanism.


       Note that the module does not support exporting lexical variables, since there is no way
       for the exporter mechanism to determine the name of a lexical and hence to export it.

       Nor does this module support the numerous addition export modes that Perl 6 offers, such
       as export-as-lexical or export-as-state.


   Bugs / Feature Requests
       Please report any bugs or feature requests through the issue tracker at
       <>.  You will be notified
       automatically of any progress on your issue.

   Source Code
       This is open source software. The code repository is available for public review and
       contribution under the terms of the license.  Feel free to fork the repository and submit
       pull requests.


           git clone

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       Alex Efros <>

       Damian Conway <>


       This software is Copyright (c) 2016 by Alex Efros <>.

       Copyright (c) 2005,2015 Damian Conway <>. All rights reserved.

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