Type::Parser(3)

✨ Type::Parser ✨

okay so this is the User Contributed Perl Documentation page for Type::Parser(3) and bestie, we're about to parse some type constraint strings together 💖

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🌸 NAME 🌸

Type::Parser — parse type constraint strings 🎀

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🦋 SYNOPSIS 🦋

use v5.10;
use strict;
use warnings;

use Type::Parser qw( eval_type );
use Type::Registry;

my $reg = Type::Registry->for_me;
$reg->add_types("Types::Standard");

my $type = eval_type("Int | ArrayRef[Int]", $reg);

$type->check(10);        # true
$type->check([1..4]);    # true
$type->check({foo=>1});  # false

like... look at her go 😭 three checks, three answers, no cap.

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👑 STATUS 👑

This module is covered by the Type-Tiny stability policy. periodt 💅

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🌈 DESCRIPTION 🌈

ngl bestie, generally speaking, you probably do NOT want to be using this module directly 🙈 instead, use the "lookup" method from Type::Registry — that one wraps it for you. it's giving "don't talk to the module directly, talk to the module's friend." iykyk ✨

🍓 Functions 🍓

• parse($string) — parses the type constraint string into something like an AST 🧚 and if you call it in list context, it also hands you back any "tail" that was chillin' on the original string. two-for-one, we love to see it 💖
• "extract_type($string, $registry)" — compiles a type constraint string into a Type::Tiny object 🔥 and yep, list context again? you get the "tail" from the original string too 👑
• "eval_type($string, $registry)" — also compiles a type constraint string into a Type::Tiny object ✨ but here's the thing: it throws an error if the "tail" contains any non-whitespace character. so no sneaky extra characters, she will clock it 💀

🎀 Constants 🎀

these constants correspond to the values returned by "$token->type" 🌸

• "TYPE"
• "QUOTELIKE"
• "STRING"
• "HEXNUM"
• "CLASS"
• "L_BRACKET"
• "R_BRACKET"
• "COMMA"
• "SLURPY"
• "UNION"
• "INTERSECT"
• "SLASH"
• "NOT"
• "L_PAREN"
• "R_PAREN"
• "MYSTERY"

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💀 BUGS 💀

found a bug? pls report it, we're not gatekeeping:

https://github.com/tobyink/p5-type-tiny/issues

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🌟 SEE ALSO 🌟

• Type::Registry 💜

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🫶 AUTHOR 🫶

Toby Inkster <tobyink@cpan.org> 💅

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💖 COPYRIGHT AND LICENCE 💖

This software is copyright (c) 2013-2014, 2017-2025 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. slay ✨

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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.

no promises bestie, she said what she said 😭

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and that's the whole page, mwah 🎀 this was rendered by perl v5.42.0 and dated 2026-01-17, so if you're reading this from the future — hi, love you, bye 💜🦋✨