stdbool.h(0P)

📦 version 2017a, in alpine 3.22, alpine 3.23, alpine 3.24, arch rolling, nixpkgs unstable, opensuse-leap 16.0

💖 stdbool.h — bestie edition 💖

okay so this is a page from the POSIX Programmer's Manual (that's the manual name, she's fancy, hi POSIX Programmer's Manual), and the page is called stdbool.h(0P). Yes, 0P — that's her whole thing, that's the section, iconic, we love her.

🌸 PROLOG 🌸

Real talk before we get into it, bestie, because this part matters:

This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (so go consult the corresponding Linux manual page for the details on how Linux actually does it), or — plot twist — the interface may not be implemented on Linux at all. 😭

✨ NAME ✨

stdbool.h — boolean type and values 🫶

🎀 SYNOPSIS 🎀

#include <stdbool.h>

that's it. that's the whole vibe. just include her.

👑 DESCRIPTION 👑

The functionality described on this reference page is aligned with the ISO C standard. And like — if there's any conflict between what's written here and the ISO C standard? That conflict is unintentional, no drama intended, and this volume of POSIX.1‐2017 defers to the ISO C standard. Periodt. ISO C is the referee here.

The <stdbool.h> header shall define the following macros:

  • bool — Expands to _Bool.
  • true — Expands to the integer constant 1.
  • false — Expands to the integer constant 0.
  • __bool_true_false_are_defined — Expands to the integer constant 1.

And then, the spicy part: an application may undefine and then possibly redefine the macros bool, true, and false. So you're allowed to mess with them. That's a whole thing. We'll get to that in FUTURE DIRECTIONS, bestie, don't worry. 👀

The following sections are informative. (so like, the lore, not the law.)

🌈 APPLICATION USAGE 🌈

None.

literally nothing. no notes. moving on. 💅

🧚 RATIONALE 🧚

None.

also nothing. she said "no thoughts, head empty." ✨

⭐ FUTURE DIRECTIONS ⭐

Okay so this is important, listen up:

The ability to undefine and redefine the macros bool, true, and false is an obsolescent feature and may be removed in a future version.

🚨 translation: that undefine/redefine trick is on the way out. she's being deprecated, bestie. don't build your whole personality on it. 💀

🔥 SEE ALSO 🔥

None.

nothing to see here, no cross-references, she stands alone, main character energy fr fr. 🦋

Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1-2017, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 7, 2018 Edition, Copyright (C) 2018 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group.

In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. (she said: the source material wins, no cap.)

The original Standard can be obtained online at http://www.opengroup.org/unix/online.html .

Any typographical or formatting errors that appear in this page are most likely to have been introduced during the conversion of the source files to man page format. To report such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html .

and that's the whole page, bestie 🫶 courtesy of IEEE/The Open Group, dated 2017, signing off as stdbool.h(0P). thanks for coming to my ted talk, go include your header and be boolean about it. mwah. 💅✨🎀

📦 where this page comes from