__GNU_PARALLEL::__ADJACENT_DIFFERENCE_SELECTOR(3)

💖 __gnu_parallel::__adjacent_difference_selector< _It >(3) 💖

okay bestie, so this is a page from the Library Functions Manual, and it's about a lil template struct with a lot of underscores in its name. don't let that scare you. she's just a selector. a very specific, very niche, very iconic selector. 🦋

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✨ NAME ✨

__gnu_parallel::__adjacent_difference_selector< _It > — the selector that hands you back the difference between two adjacent __elements. that's it, that's the whole job. no cap. 💅

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🌸 SYNOPSIS 🌸

#include <for_each_selectors.h>

she inherits from __gnu_parallel::__generic_for_each_selector< _It >, so she's got family, she's got lineage, she's got inherited members (we'll get there, don't worry). 👑

🎀 Public Member Functions

• template<typename _Op> bool operator() — takes (_Op &__o, _It __i). yeah that's the whole signature. she calls, she compares, she moves on. ✨

🎀 Public Attributes

• _It _M_finish_iterator — "Iterator on last element processed; needed for some algorithms (e. g. std::transform())." so basically she keeps receipts on where she stopped, because some algorithms (yes, std::transform() — we see you) literally cannot function without knowing that. 💀

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🌈 Detailed Description 🌈

template<typename _It>
struct __gnu_parallel::__adjacent_difference_selector< _It >

"Selector that returns the difference between two adjacent __elements."

that's the vibe. she looks at two elements standing next to each other and she reports the difference. lowkey a little nosy of her but honestly? we support it. 🫶

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🧚 Member Data Documentation 🧚

• template<typename _It> _It __gnu_parallel::__generic_for_each_selector< _It >::_M_finish_iterator — marked as [inherited], so she got it from her parent struct, not from her own hard work (respect the lineage tho 💜).

what is it fr fr? "Iterator on last element processed; needed for some algorithms (e. g. std::transform())."

so it's the iterator pointing at the last element that got processed. some algorithms — again, std::transform() is named and shamed here — genuinely need to know where the processing stopped, and this is the field that tells them. periodt. ⭐

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👑 Author 👑

Generated automatically by Doxygen for libstdc++ from the source code.

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so yeah, that's the whole page. she's short, she's inherited, she's automatic, and she was born from a source file at the hands of Doxygen itself. main character energy in a supporting-role package. 🎀

kisses, this was libstdc++ (Library Functions Manual) — the __gnu_para...ctor< _It >(3) page, brought to you by Doxygen-generated docs, and yes, the name really does get truncated like that in the header. slay. 💖✨🦋