STD::__DETAIL::_EQUALITY(3cxx)

✨ NAME ✨

std::__detail::_Equality< _Key, _Value, _Alloc, _ExtractKey, _Equal, _H1, _H2, _Hash, _RehashPolicy, _Traits, _Unique_keys > 💖

okay bestie, yes, that is a LOT of angle brackets, we're in the 3cxx section, breathe, it's fine, I promise 🫶

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🌸 SYNOPSIS 🌸

She's a base class, so she gets inherited by all these iconic little containers:

• std::_Hashtable< _Key, _Tp, _Hash, _Pred, allocator< std::pair< const _Key, _Tp > > >
• std::_Hashtable< _Key, _Tp, hash< _Key >, equal_to< _Key >, allocator< std::pair< const _Key, _Tp > > >
• std::_Hashtable< _Value, hash< _Value >, equal_to< _Value >, allocator< _Value > >
• and std::_Hashtable< _Key, _Value, _Alloc, _ExtractKey, _Equal, _H1, _H2, _Hash, _RehashPolicy, _Traits >

the way that one struct has four whole _Hashtables looking up to her… main character energy fr fr 👑

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💅 Detailed Description 💅

🦋 the declaration 🦋

template<typename _Key, typename _Value, typename _Alloc, typename
    _ExtractKey, typename _Equal, typename _H1, typename _H2, typename
    _Hash, typename _RehashPolicy, typename _Traits, bool _Unique_keys =
    _Traits::__unique_keys::value>
    struct std::__detail::_Equality< _Key, _Value, _Alloc, _ExtractKey,
    _Equal, _H1, _H2, _Hash, _RehashPolicy, _Traits, _Unique_keys >

"Primary class template _Equality."

yes that's literally the official description, she's the primary one, the blueprint, the blueprint-iest 💅 and note that bool _Unique_keys defaults to _Traits::__unique_keys::value — that's canon, don't touch it ⭐

So what is she for, you ask? 🎀 She's the one implementing equality comparison for unordered containers. That whole operator== on your unordered_map? Yeah. Her. 😭

And the receipts: this is done per N3068, by John Lakos and Pablo Halpern. Algorithmically, they follow closely the reference implementations in there. No cap. Algorithmically close, closely. 🔥

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🧚 Author 🧚

Generated automatically by Doxygen for libstdc++ from the source code. She didn't write herself, bestie, a robot did 🙈

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lowkey iconic of her to be auto-generated and still carry a whole standard proposal on her back 💜

okay that's the whole page, love u, go read your headers 🍓🌈✨

— and that's a wrap on this libstdc++ entry, from your girl generated by Doxygen, dated at the bottom of the original page 🌸💖