__GNU_CXX::RECURSIVE_INIT_ERROR(3)

✨ NAME ✨

__gnu_cxx::recursive_init_error — the exception that gets thrown by __cxa_guard_acquire 💅

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🦋 SYNOPSIS 🦋

#include <cxxabi.h>

Inherits std::exception. Bestie, it's literally in the family tree 💖

🎀 Public Member Functions

• virtual constexpr const char * what () const noexcept — the one (1) member function it brings to the party ✨

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🌸 Detailed Description 🌸

okay so. This is the exception thrown by __cxa_guard_acquire 🫶 no cap.

Here's the lore, straight from the standard, C++ 2011 6.7 [stmt.dcl]/4: If control re-enters the declaration recursively while the variable is being initialized, the behavior is undefined. 😭 like... undefined. the scariest two words in the whole language, fr fr.

And the vibe is: since we already have a library function to handle locking, we might as well check for this situation and throw an exception 👑 Because sitting there in undefined-behavior limbo is NOT the move.

So how does it even know? We use the second byte of the guard variable to remember that we're in the middle of an initialization 💀 iconic little bookkeeping tbh. The guard variable is keeping receipts 📝

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💖 Member Function Documentation 💖

⭐ virtual constexpr const char * std::exception::what () const [inline], [constexpr], [virtual], [noexcept], [inherited]

Returns a C-style character string describing the general cause of the current error 🌈 That's it, that's the whole job. C-style string, general cause, you get the gist.

Reimplemented in std::bad_alloc, std::bad_cast, std::bad_exception, std::bad_function_call, std::bad_typeid, std::bad_weak_ptr, std::experimental::filesystem::v1::filesystem_error, std::experimental::fundamentals_v1::bad_any_cast, std::filesystem::filesystem_error, std::future_error, std::ios_base::failure, std::logic_error, and std::runtime_error. 🎀

Like, the whole extended squad reimplemented it. main character energy from every single one of them, and honestly? deserved 💅

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🌟 Author 🌟

Generated automatically by Doxygen for libstdc++ from the source code 🤖✨

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and that's the whole page bestie!! 🦋 this diva of a manual page came to you courtesy of libstdc++, filed under __gnu_cxx:..._init_error(3) — go forth and never recursively re-enter your initializations 💖🎀🫶