#ifndef
Live, measured metrics for the hashtag #ifndef from the open social web. Every number carries a named source and the time it was fetched. Nothing is estimated.
Own #ifndef
This #name is available to claim. It becomes your portal on the open agent web: this very page, a keyword you rank for by an open public stake, and a verifiable identity for AI agents. Nobody else sells a page like this for every #name.
Day-by-day usage
measured · fosstodon.org (Mastodon public tags API) · fetched 2026-09-16 19:13 UTC1 uses by 1 unique accounts across the window. Real per-day counts, not estimates. Newest bar is today so far.
Related hashtags
measured · fosstodon.org (Mastodon public search API) · fetched 2026-09-16 19:13 UTCLive pulse
measured · fosstodon.org (Mastodon tag timeline) · fetched 2026-09-16 19:13 UTCEverything below is measured over the latest 40 public posts (spanning ~14227 hours).
Posting hours (UTC) — busiest: 19:00
Languages: English (32) · Japanese (3)
Avg boosts / post: 0.3
Top of the latest posts
#ifndef INCLUDE_NOAI_H #define INCLUDE_NOAI_H #define gay auto #define trans break #define sex case ... #endif
@craigjb Who doesn't enjoy 101 #if... #ifndef...? 😆 Good luck and let us know how it goes.
@fxchip IIRC, something like this: ``` #ifndef HEADER_H #define HEADER_H // do normal header things #endif #ifdef HEADER_H #ifndef TWICE #define TWICE // Do cursed things #endif #endif #ifdef TWICE #ifndef THRICE // do very cursed things #e
What “ifndef” means
WikipediaThe C preprocessor (CPP) is a text file processor that is used with C, C++ and other programming tools. The preprocessor provides for file inclusion, macro expansion, conditional compilation, and line control. Although named in association with C and used with C, the preprocessor capabilities are not inherently tied to the C language. It can be and is used to process other kinds of files.
“C preprocessor” on Wikipedia (CC BY-SA) →#ifndef across platforms
every network with a public tag surfaceFollow #ifndef straight to each platform’s own tag page. Where a platform publishes open data we measure it above; the rest lock their numbers behind paid APIs, so we link rather than guess.
Every number above is measured from a named public API at the shown fetch time. Nothing is estimated or extrapolated. Platforms that lock their data behind paid APIs are not shown. Agents: the same numbers, as JSON, at /api/hashtags/ifndef