Front page | perl.perl5.porters |
Postings from February 2022
Some people expressed interest in the :export functionality of the module proposal. Thus, another pre-RFC.
Using Exporter.pm or writing your own import() sub is very clumsy, but very common. This should be native to Perl.
The idea is to provide exporting via an `:export` attribute:
package Foo {
sub bar :export {...} # @EXPORT_OK
sub baz :export(:strings) %EXPORT_TAGS
sub quux :export(:ALWAYS) {...} # @EXPORT
sub whee {...} # not exported
}
These exports are set via attributes, they do *not* require the import() sub to be called, and they are lexical.
Open questions.
1. How would one would handle delayed importing? `Foo->import('bar');`
2. Allow renaming of imported functions?
3. "Lexical importing" means "callable until end of enclosing block unless shadowed", but does that also mean that it's not in the symbol table? (I would assume so)
Related prior art on the CPAN:
https://metacpan.org/pod/Perl6::Export::Attrs
https://metacpan.org/pod/Lexical::Import
https://metacpan.org/pod/Export::Lexical
https://metacpan.org/pod/Exporter::Tiny
https://metacpan.org/pod/namespace::autoclean
Best,
Ovid
--
IT consulting, training, specializing in Perl, databases, and agile development
http://www.allaroundtheworld.fr/.
Buy my book! - http://bit.ly/beginning_perl
Thread Next