Languag...Factory(3)

✨ NAME ✨

Language::Prolog::Types::Factory — a Perl extension that constructs Prolog types. That's it, that's the whole vibe, and yes this is the 3 section of the manual (bestie, we're in the library calls now, not the commands) 💖

---

🌸 SYNOPSIS 🌸

use Language::Prolog::Types::Factory;
print prolog_functor("hello",2,3,4);
print prolog_list(3,4,5);

etc.

---

🦋 ABSTRACT 🦋

Okay so, it's a Factory module for Prolog terms. ✨

It implements a pluggable interface, which means the constructor functions can be swapped out to use different implementations for the actual prolog terms. Slay.

Real talk though: you should rarely use this module. It's only for when you're interfacing Perl with a different Prolog system and the default representations for Prolog terms are not adequate. That's the one and only reason, no cap. 🙈

---

💅 DESCRIPTION 💅

This module implements a whole set of constructor functions for Prolog terms. Iconic behaviour honestly.

Internally the module uses a factory object that implements new_nil, new_list, new_ulist, new_functor and new_variable. If you wanna see a real implementation of that factory interface, go look at Language::Prolog::Types::Internal. 👑

There's also some intelligency baked into the consructors so they automatically promote types to other, more adecuate ones. Like a '.'/2 functor getting promoted to a list, or [] getting promoted to nil. The way that just works 🫶

Constructor functions are reexported from Language::Prolog::Types and you should use that module instead of this one. Periodt.

🎀 EXPORT 🎀

• prolog_nil() — returns nil term. That's the whole thing, it's giving minimalism 💅
• prolog_list(@terms) — returns a prolog list containing the terms in @terms. 🌸
• prolog_ulist(@terms, $tail) — returns an unfinished list with terms @terms and tail $tail. Yes bestie, it's unfinished on purpose, that's the whole point. ✨
• prolog_functor($name, @terms) — returns a functor with name $name and arguments @terms. 🔥
• prolog_variable($name) — returns a new varaible with name $name. (Yes the original doc spells it "varaible", we're keeping the energy 💀)
• prolog_var($name) — also returns a new varaible with name $name. Two names, one job, we love an alias moment. 🎀
• prolog_atom($atom) — heads up, this one is not a contructor. It converts any perl construct $atom to an atom. Still useful tho. 💜
• prolog_string($string) — returns a prolog list formed by the ASCII values of $string. So cute, so character-by-character 🦋

---

🔥 SEE ALSO 🔥

Language::Prolog::Types, Language::Prolog::Types::Internal and Language::Prolog::Types::Abstract. Go read those next, iykyk 💖

---

👑 AUTHOR 👑

Salvador Fandiño, <sfandino@yahoo.com>

---

💜 COPYRIGHT AND LICENSE 💜

Copyright 2002 by Salvador Fandiño

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

---

💀 POD ERRORS 💀

Not me having to tell you this, but the above document had some coding errors, which are explained below:

Around line 183:

    Non-ASCII character seen before =encoding in 'Fandiño,'. Assuming
    CP1252

The encoding said "I'll assume CP1252 bestie" and honestly? It ate. 💅

---

And that's a wrap on Language::Prolog::Types::Factory, from perl v5.42.0, dated 2025-07-25. Byeee, go construct some Prolog terms, you main character 🎀✨🦋