Types::Standard::Map(3pm) — Chainguard OS Manuals

Types::Standard::Map(3)

User Contributed Perl Documentation

Types::Standard::Map(3)

NAME

Types::Standard::Map - exporter utility for the Map type constraint

SYNOPSIS

  use Types::Standard -types;
  
  # Normal way to validate map.
  #
  Map->of( Int, Str )->assert_valid( { 1 => "one" } );
  
  use Types::Standard::Map IntsToStrs => { keys => Int, values => Str },
  
  # Exported shortcut
  #
  assert_IntsToStrs { 1 => "one" };

STATUS

This module is not covered by the Type-Tiny stability policy.

DESCRIPTION

This is mostly internal code, but can also act as an exporter utility.

Exports

Types::Standard::Map can be used experimentally as an exporter.

  use Types::Standard 'Int';
  use Types::Standard::Map IntsToStrs => { keys => Int, values => Str },

This will export the following functions into your namespace:

"IntsToStrs"
is_IntsToStrs( $value )
assert_IntsToStrs( $value )
to_IntsToStrs( $value )

Multiple types can be exported at once:

  use Types::Standard -types;
  use Types::Standard::Map (
    IntsToStrs  => { keys => Int, values => Str },
    StrsToInts  => { keys => Str, values => Int },
  );
  
  assert_StrsToInts { two => 2 };   # should not die

It's possible to further constrain the hashref using "where":

  use Types::Standard::Dict MyThing => {
    keys   => Str->where( sub { ... } ),
    values => Int->where( sub { ... } ),
    where  => sub { ... },
  };

BUGS

Please report any bugs to <https://github.com/tobyink/p5-type-tiny/issues>.

AUTHOR

Toby Inkster <tobyink@cpan.org>.

COPYRIGHT AND LICENCE

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

DISCLAIMER OF WARRANTIES

THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.

2026-06-28

perl v5.42.2