std::error_category(3cxx)

💅 std::error_category — a deep dive, bestie edition

okay so welcome to std::error_category(3cxx), straight out of libstdc++, and honestly? this one's kind of a big deal. it's the abstract base class that gives vibes — and meaning — to your error codes. let's get into it 🎀

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✨ NAME ✨

std::error_category — the main character of error code categorization. no cap.

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🌸 SYNOPSIS 🌸

🫶 Public Member Functions

• error_category (const error_category &)=delete — copy constructor? deleted. not allowed. not today. 🙅‍♀️
• virtual error_condition default_error_condition (int __i) const noexcept — hands you the default error_condition for the int __i. it's noexcept, so no drama.
• virtual bool equivalent (const error_code &__code, int __i) const noexcept — checks if __code and the int __i are equivalent. noexcept, obviously.
• virtual bool equivalent (int __i, const error_condition &__cond) const noexcept — same energy, but the other way around: int __i vs. the error_condition __cond. also noexcept.
• virtual string message (int) const =0 — pure virtual, so you have to write it. returns the message string for an int. yes it's on you bestie 😭
• virtual const char * name () const noexcept=0 — also pure virtual, also your problem. returns the category name as a const char *, and it's noexcept.
• bool operator!= (const error_category &__other) const noexcept — are these two categories not the same? noexcept, so chill.
• bool operator< (const error_category &__other) const noexcept — ordering comparison against __other. noexcept. slay for sorting.
• error_category & operator= (const error_category &)=delete — assignment? deleted. absolutely not. 💀
• bool operator== (const error_category &__other) const noexcept — are they equal? noexcept. iconic.

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🦋 Detailed Description 🦋

Abstract base class for types defining a category of error codes. literally what it says on the tin, and it ate.

An error category defines a context that gives meaning to the integer stored in an error_code or error_condition object. like, the integer alone is just a number — the category is what tells you what that number means. it's giving translator energy. 🌈

For example, the standard errno constants such as EINVAL and ENOMEM are associated with the 'generic' category, and other OS-specific error numbers are associated with the 'system' category — but a user-defined category might give different meanings to the same numerical values. so like, same int, completely different storyline. main character energy for real. 👑

⭐ Since

C++11 — she's been here a minute, respect the elder. 💜

🎀 Definition

At line 97 of file system_error. yep, that's where she lives. iykyk.

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🧚 Author 🧚

Generated automatically by Doxygen for libstdc++ from the source code. not a human author, just robot magic doing its thing. no cap. 🤖✨

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ok that's the whole page bestie, every flag, every signature, every noexcept — nothing skipped, periodt. 💅

sign-off szn: this lil beauty came from libstdc++ and is dated Sat Mar 19 2022. go forth and categorize your errors responsibly, mwah 🫶💖🌸