__GNU_CXX::__MT_ALLOC_BASE(3)

💖 __gnu_cxx::__mt_alloc_base< _Tp > — Library Functions Manual 💖

okay bestie, welcome to the group chat, this is the libstdc++ manual and today we're reading about a whole entire template class, no biggie 🎀

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✨ NAME ✨

__gnu_cxx::__mt_alloc_base< _Tp > — it's the base class for _Tp dependent member functions. literally just the scaffolding that the _Tp-specific bits hang off of. she's giving foundation, not facade 💅

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🌸 SYNOPSIS 🌸

#include <mt_allocator.h>

Inherited by __gnu_cxx::__mt_alloc< _Tp1, pol_type >, and
__gnu_cxx::__mt_alloc< _Tp, _Poolp >.

so she's the mom of two __mt_alloc variants — one parameterised by _Tp1, pol_type and one by _Tp, _Poolp. nepo baby behaviour honestly, but like, in a structural-inheritance way 🦋

🔥 Public Types 🔥

the whole glow-up lineup, every single one, no skipping:

• typedef const _Tp * const_pointer — a pointer that refuses to be changed. boundaries, she has them ✋
• typedef const _Tp & const_reference — same energy but a reference
• typedef std::ptrdiff_t difference_type — for when you need to know how far apart two things are 🥲
• typedef _Tp * pointer — the regular, editable pointer
• typedef std::true_type propagate_on_container_move_assignment — yes, when the container gets move-assigned, this propagates. std::true_type. that's the answer, periodt 💯
• typedef _Tp & reference — a reference you can touch
• typedef std::size_t size_type — sizes, but make it standard
• typedef _Tp value_type — the actual type this whole thing is about. the main character 👑

💅 Public Member Functions 💅

all five of them, verbatim, because we do NOT paraphrase code in this house:

• const_pointer address (const_reference __x) const noexcept — hand her a const ref, get back a const pointer. no throw, no drama ✨
• pointer address (reference __x) const noexcept — same deal but non-const, still noexcept
• template<typename _Up, typename... _Args> void construct (_Up *__p, _Args &&... __args) — variadic, perfect-forwarding core, builds an object at __p out of __args. she's crafty 🧚
• template<typename _Up> void destroy (_Up *__p) — the reverse. bye bestie 💀
• size_type max_size () const noexcept — how big can she possibly get? noexcept, so she won't spiral about it 🌈

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🌟 Detailed Description 🌟

template<typename _Tp>
    class __gnu_cxx::__mt_alloc_base< _Tp >"Base class for _Tp dependent
    member functions.

okay so — she's a template, _Tp all the way down, and her one job description is being the base class for _Tp dependent member functions. the _Tp-agnostic logic lives here, the _Tp-specific logic lives in the children. it's giving delegation, it's giving clean separation of concerns, it's giving architecture 😭🫶

ngl the original description has a stray quote mark in there and we are keeping it, because the vibe is preservation not correction 🙈

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👑 Author 👑

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

yes bestie, nobody wrote this, a robot did, and honestly? she ate 🤖✨

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that's the whole page! 💖 this one shipped as part of libstdc++, and the whole thing is dated right there in the footer with the classic __gnu_cxx:...base< _Tp >(3) tag. go forth and inherit responsibly, mwah 💅🎀🦋