# ABSTRACT: Extending Data::Sah
# PODNAME: Data::Sah::Manual::Extending

__END__

=pod

=encoding UTF-8

=head1 NAME

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

=head1 VERSION

This document describes version 0.908 of Data::Sah::Manual::Extending (from Perl distribution Data-Sah), released on 2020-05-21.

=head1 DESCRIPTION

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

=head1 ADDING A NEW CLAUSE

Example: Add an C<is_palindrome> clause to C<str>.

=over

=item * Create a distribution called Data-Sah-TypeX-str-is_palindrome

=item * 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 {
             ...
         },
     },
 );

=item * 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.

=back

=head1 CREATING A NEW TYPE

Example: complex number.

=over

=item * Create distribution Data-Sah-Type-complex

=item * 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;

=item * In lib/Data/Sah/Compiler/perl/TH/complex.pm write:

XXX

=item * In lib/Data/Sah/Compiler/js/TH/complex.pm write:

XXX

=item * In lib/Data/Sah/Compiler/human/TH/complex.pm write:

XXX

=item * 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.

=back

=head1 ADDING A NEW FUNCTION

XXX

=head1 CREATING A NEW FUNCTION SET

XXX

=head1 CREATING A NEW COMPILER

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

=head1 HOMEPAGE

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

=head1 SOURCE

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

=head1 BUGS

Please report any bugs or feature requests on the bugtracker website L<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.

=head1 AUTHOR

perlancar <perlancar@cpan.org>

=head1 COPYRIGHT AND LICENSE

This software is copyright (c) 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.

=cut