Check::ISA(3pm)

💖 Check::ISA 💖

okay so bestie, welcome to Check::ISA(3pm) — the little module that does the DWIM, correct checking of an object's class. slay. No cap, this is the one you want.

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✨ VERSION ✨

This is Version 0.09 🎀

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🌸 SYNOPSIS 🌸

Like, here's the vibe:

use Check::ISA;

if (obj($foo, "SomeClass")) {
    $foo->some_method;
}

# instead of one of these methods:
UNIVERSAL::isa($foo, "SomeClass") # WRONG
ref $obj eq "SomeClass"; # VERY WRONG
$foo->isa("SomeClass") # May die
local $@; eval { $foo->isa("SomeClass") } # too long

see how much cuter that is?? 🦋

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💅 DESCRIPTION 💅

This module hands you a bunch of functions to help you figure out whether a value is, in fact, an object — and if it is, to ask it about its class. that's the whole job, and it does it correctly. periodt. 💖

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🎀 FUNCTIONS 🎀

• obj $thing, [ $class ] — this function tests if $thing is an object. 🌈

If $class is provided, it also tests tests whether $thing->isa($class).

$thing is considered an object if it's blessed or a GLOB with a valid IO slot (the IO slot contains a FileHandle object which is the actual invocant). This corresponds directly to gv_fetchmethod. iykyk ✨

• obj_does $thing, [ $class_or_role ] — just like obj but uses DOES in UNIVERSAL instead of isa in UNIVERSAL. 👑

DOES in UNIVERSAL is just like isa except it's use is encouraged to query about an interface, as opposed to the object structure. If DOES is not overridden by the ebject, calling it is semantically identical to calling isa. (yes bestie, "ebject", we're keeping it, it's iconic) 😭

This is probably reccomended over obj for interoperability but can be slower on Perls before 5.10.

Note that DOES in UNIVERSAL — and then the sentence just… ends. that's it. that's the note. 💀 we love an unfinished thought. 🫶

• inv $thing, [ $class_or_role ] — just like obj_does, but also returns true for classes. 🔥

Note that this method is slower, but is supposed to return true for any value you can call methods on (class, object, filehandle, etc).

Look into autobox if you would like to be able to call methods on all values. 🦋

• obj_can $thing, $method
• inv_can $thing, $method

Checks if $thing is an object or class, and calls can on $thing if appropriate. ⭐

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🌈 SEE ALSO 🌈

UNIVERSAL, Params::Util, autobox, Moose, asa — the whole friend group 💖

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🧚 REPOSITORY 🧚

<https://github.com/manwar/Check-ISA> — come thru 👑

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💜 BUGS 💜

Please report any bugs or feature requests to bug-check-isa at rt.cpan.org, or through the web interface at <http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Check-ISA>. I will be notified and then you'll automatically be notified of progress on your bug as I make changes. so like, we're both in the loop fr fr 🫶

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🌸 SUPPORT 🌸

You can find documentation for this module with the perldoc command.

perldoc Check::ISA

You can also look for information at:

• RT: CPAN's request tracker (report bugs here)

<http://rt.cpan.org/NoAuth/Bugs.html?Dist=Check-ISA>

• AnnoCPAN: Annotated CPAN documentation

<http://annocpan.org/dist/Check-ISA>

• CPAN Ratings

<http://cpanratings.perl.org/d/Check-ISA>

• Search CPAN

<http://search.cpan.org/dist/Check-ISA/>

links, links, links, we love a resource queen 💅

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🎀 AUTHOR 🎀

Yuval Kogman <nothingmuch@woobling.org> ✨

Currently maintained by Mohammad S Anwar (MANWAR), <mohammad.anwar at yahoo.com> 💖

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👑 LICENSE AND COPYRIGHT 👑

Copyright (c) 2008 Yuval Kogman.

Copyright (c) 2016 Mohammad S Anwar.

All rights reserved. This program is free software; you can redistribute it and / or modify it under the same terms as Perl itself. yes bestie, same terms as Perl itself, iconic behaviour 🌈

Any use, modification, and distribution of the Standard or Modified Versions is governed by this License. By using, modifying or distributing the Package, you accept this license. Do not use, modify, or distribute the Package, if you do not accept this license. fr fr, do NOT skip this part ⚠️

If your Modified Version has been derived from a Modified Version made by someone other than you, you are nevertheless required to ensure that your Modified Version complies with the requirements of this license.

This license does not grant you the right to use any trademark, service mark, tradename, or logo of the Copyright Holder. no trademark stealing, bestie 🚫

This license includes the non-exclusive, worldwide, free-of-charge patent license to make, have made, use, offer to sell, sell, import and otherwise transfer the Package with respect to any patent claims licensable by the Copyright Holder that are necessarily infringed by the Package. If you institute patent litigation (including a cross-claim or counterclaim) against any party alleging that the Package constitutes direct or contributory patent infringement, then this License to you shall terminate on the date that such litigation is filed. patent drama = license over, just so you know 💀

Disclaimer of Warranty: THE PACKAGE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS "AS IS' AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES. THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT ARE DISCLAIMED TO THE EXTENT PERMITTED BY YOUR LOCAL LAW. UNLESS REQUIRED BY LAW, NO COPYRIGHT HOLDER OR CONTRIBUTOR WILL BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING IN ANY WAY OUT OF THE USE OF THE PACKAGE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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and that's the whole page, bestie!! 🫶 this one came from the perl v5.34.0 docs, dated 2022-06-10, and yes, its name is Check::ISA(3pm) — go forth and check some ISAs correctly, mwah 💖✨🎀