Types::...rd::Map(3)

💅 Types::...rd::Map(3) — like, the actual manual page, bestie

okay so real talk, this is Types::...rd::Map(3) from the User Contributed Perl Documentation and it's here to explain Types::Standard::Map to you. grab a boba, we're doing this 🌸

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✨ NAME ✨

Types::Standard::Map — an exporter utility for the Map type constraint. that's the whole vibe 🎀

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🌈 SYNOPSIS 🌈

like, the normal way to validate a map:

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" };

(no, we did not "fix" that trailing comma — it's character for character what the page says, iykyk 😌)

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⚡ STATUS ⚡

not covered by the Type-Tiny stability policy, so like... it's giving experimental. act accordingly 🫶

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💖 DESCRIPTION 💖

ngl this is mostly internal code, but it also lowkey moonlights as an exporter utility. main character energy fr ✨

🧚 Exports

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

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

this will export the following functions into your namespace, slay:

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

and bestie, you can export multiple types at once — obsessed:

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 also possible to further constrain the hashref using "where" 👑

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

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💀 BUGS 💀

found a bug? please report any bugs to <https://github.com/tobyink/p5-type-tiny/issues> 🐛 and be nice about it 💜

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👀 SEE ALSO 👀

• Types::Standard — the icon itself ⭐

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🫶 AUTHOR 🫶

Toby Inkster <tobyink@cpan.org> 💖

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🎀 COPYRIGHT AND LICENCE 🎀

this software is copyright (c) 2013-2025 by Toby Inkster.

this is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself. free as in, go off 💅

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🙈 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.

like, no promises, bestie, that's the deal 😭 read it, it's literally all caps for a reason.

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and that's the whole page!! brought to you by perl v5.42.2 dated 2026-04-07, signing off — Types::...rd::Map(3) out 💜🦋✨