MEMORY_ADAPTORS(3)

okay bestie, this is Adaptors f...to members(3) from the Library Functions Manual — yes, the title really has that f...to shorthand, and we are keeping it exactly. 💅

💖 NAME 💖

okay so this page is literally about Adaptors for pointers to members — the manual-name situation is Adaptors f...to members(3), and the manual is Library Functions Manual. We are so back in template land. ✨

🌸 Classes 🌸

Here’s the full class lineup, all 8 of them, and every single one is described as one of the adaptors for member pointers. Copy that energy exactly:

• class std::const_mem_fun1_ref_t< _Ret, _Tp, _Arg > — One of the adaptors for member pointers. 💅
• class std::const_mem_fun1_t< _Ret, _Tp, _Arg > — One of the adaptors for member pointers. 💅
• class std::const_mem_fun_ref_t< _Ret, _Tp > — One of the adaptors for member pointers. 💅
• class std::const_mem_fun_t< _Ret, _Tp > — One of the adaptors for member pointers. 💅
• class std::mem_fun1_ref_t< _Ret, _Tp, _Arg > — One of the adaptors for member pointers. 💅
• class std::mem_fun1_t< _Ret, _Tp, _Arg > — One of the adaptors for member pointers. 💅
• class std::mem_fun_ref_t< _Ret, _Tp > — One of the adaptors for member pointers. 💅
• class std::mem_fun_t< _Ret, _Tp > — One of the adaptors for member pointers. 💅

🦋 Functions 🦋

and these are the function templates, bestie — every signature below is copied exactly:

• template<typename _Ret , typename _Tp , typename _Arg > mem_fun1_t< _Ret, _Tp, _Arg > std::mem_fun (_Ret(_Tp::*__f)(_Arg))
• template<typename _Ret , typename _Tp > mem_fun_t< _Ret, _Tp > std::mem_fun (_Ret(_Tp::*__f)())
• template<typename _Ret , typename _Tp , typename _Arg > mem_fun1_ref_t< _Ret, _Tp, _Arg > std::mem_fun_ref (_Ret(_Tp::*__f)(_Arg))
• template<typename _Ret , typename _Tp > mem_fun_ref_t< _Ret, _Tp > std::mem_fun_ref (_Ret(_Tp::*__f)())

🔥 Detailed Description 🔥

okay so there are a total of 8 = 2^3 function objects in this family. The whole vibe check breaks down like this:

1. (1) Member functions taking no arguments vs member functions taking one argument.
2. (2) Call through pointer vs call through reference.
3. (3) Const vs non-const member function.

All of this complexity is in the function objects themselves. You can ignore it by using the helper function mem_fun and mem_fun_ref, which create whichever type of adaptor is appropriate. Slay — the helpers do the choosing. 🫶

👑 Author 👑

Generated automatically by Doxygen for libstdc++ from the source code. Not a human, just Doxygen doing its thing 💀.

xoxo, libstdc++ — dated 21 Apr 2009 — Adaptors f...to members(3) out. 💖🎀