NAME

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

VERSION

version 0.18

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.

AUTHOR

Steven Haryanto <stevenharyanto@gmail.com>

COPYRIGHT AND LICENSE

This software is copyright (c) 2013 by Steven Haryanto.

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