• NAME
• VERSION
• DESCRIPTION
• ADDING A NEW CLAUSE
• CREATING A NEW TYPE
• ADDING A NEW FUNCTION
• CREATING A NEW FUNCTION SET
• CREATING A NEW COMPILER
• HOMEPAGE
• SOURCE
• BUGS
• AUTHOR
• COPYRIGHT AND LICENSE

NAME

Data::Sah::Manual::Extending - Extending Data::Sah

VERSION

This document describes version 0.910 of Data::Sah::Manual::Extending (from Perl distribution Data-Sah), released on 2021-08-01.

DESCRIPTION

This document explains the various ways of extending Data::Sah.

ADDING A NEW CLAUSE

Example: Add an is_palindrome clause to str.

• Create a distribution called Data-Sah-TypeX-str-is_palindrome

• In lib/Data/Sah/TypeX/str/is_palindrome.pm, write:

   package Data::Sah::TypeX::str::is_palindrome;
   use Data::Sah::Util::Compiler qw(add_clause add_translation_path);
  
   add_clause("str", "is_palindrome",
       definition => {
       },
       handlers => {
           perl => sub {
               ...
           },
           js => sub {
               ...
           },
           human => sub {
               ...
           },
       },
   );

• Provide translation of messages

  For example, for Indonesian, in lib/Data/Sah/Lang/id_ID/TypeX/str/is_palindrome.pm write:

   package Data::Sah::Lang::id_ID::TypeX::str::is_palindrome:
   ...

  Add more language files as necessary.

CREATING A NEW TYPE

Example: complex number.

• Create distribution Data-Sah-Type-complex

• In lib/Data/Sah/Type/complex.pm write:

   package Data::Sah::Type::complex;
  
   use Moo::Role;
   use Data::Sah::Util::Role 'has_clause';
   with 'Data::Sah::Type::Comparable';
   with 'Data::Sah::Type::Sortable';
  
   ...
  
   1;

• In lib/Data/Sah/Compiler/perl/TH/complex.pm write:

  XXX

• In lib/Data/Sah/Compiler/js/TH/complex.pm write:

  XXX

• In lib/Data/Sah/Compiler/human/TH/complex.pm write:

  XXX

• Provide translation of messages

  For example, for Indonesian, in lib/Data/Sah/Lang/id_ID/Type/complex.pm write:

   package Data::Sah::Lang::id_ID::TypeX::str::is_palindrome:
   ...

  Add more language files as necessary.

ADDING A NEW FUNCTION

XXX

CREATING A NEW FUNCTION SET

XXX

CREATING A NEW COMPILER

Take a look at one of the existing compilers like Data::Sah::Compiler::perl or Data::Sah::Compiler::human.

HOMEPAGE

Please visit the project's homepage at https://metacpan.org/release/Data-Sah.

SOURCE

Source repository is at https://github.com/perlancar/perl-Data-Sah.

BUGS

Please report any bugs or feature requests on the bugtracker website https://rt.cpan.org/Public/Dist/Display.html?Name=Data-Sah

When submitting a bug or request, please include a test-file or a patch to an existing test-file that illustrates the bug or desired feature.

AUTHOR

perlancar <perlancar@cpan.org>

COPYRIGHT AND LICENSE

This software is copyright (c) 2021, 2020, 2019, 2018, 2017, 2016, 2015, 2014, 2013, 2012 by perlancar@cpan.org.

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