std::indirectly_comparable(3cxx)

✨ NAME ✨

std::indirectly_comparable — okay bestie, it's a concept, specifically [alg.req.ind.cmp], and the concept's whole name is indirectly_comparable 💖

This is from the libstdc++ manual, section 3cxx, just so you know where you are 🫶

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🌸 SYNOPSIS 🌸

You gotta pull in the header first, no cap:

#include <iterator>

🦋 Concept definition 🦋

Here's the whole vibe, character for character, don't let me catch you editing it:

template<typename _I1, typename _I2, typename _Rel, typename _P1 identity, typename _P2 identity>
concept std::indirectly_comparable =  indirect_binary_predicate<_Rel, projected<_I1, _P1>,
                                  projected<_I2, _P2>>

Two iterators, a relation, and two projections walk into a bar… and the concept says whether _Rel is an indirect_binary_predicate over the projections. That's the whole thing. She's simple, she's elegant, she ate 💅

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👑 Detailed Description 👑

[alg.req.ind.cmp], concept indirectly_comparable.

Yeah. That's it. That's the description. Iconic of her honestly 🌈

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💜 Author 💜

Not a person, bestie — this was generated automatically by Doxygen for libstdc++ straight from the source code. No human author, just machinery doing its little thing 🤖✨

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Heads up: every flag, name and code snippet above is copied exactly as it appears in the original page, so don't go "fixing" the template params — typename _P1 identity is literally what it says, fr fr 😭

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libstdc++ · std::indirectly_comparable(3cxx) — that's the source and the version, mwah 💋 thanks for reading, ily, go write some iterators 🎀🦋💖