#ifdef
Live, measured metrics for the hashtag #ifdef from the open social web. Every number carries a named source and the time it was fetched. Nothing is estimated.
Own #ifdef
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 · mastodon.online (Mastodon public tags API) · fetched 2026-09-13 16:57 UTC0 uses by 0 unique accounts across the window. Real per-day counts, not estimates. Newest bar is today so far.
Related hashtags
measured · mastodon.online (Mastodon public search API) · fetched 2026-09-13 16:57 UTCLive pulse
measured · mastodon.online (Mastodon tag timeline) · fetched 2026-09-13 16:57 UTCEverything below is measured over the latest 40 public posts (spanning ~5233 hours).
Posting hours (UTC) — busiest: 15:00
Languages: English (36) · German (2) · Portuguese (1) · Japanese (1)
Avg boosts / post: 2.2
Top of the latest posts
Celebrating 45 Years of Kermit with the First New C-Kermit Release in 15 Years (and working with a decades-old C codebase) 1981 was a different time for computing. It was expensive (both hardware and software), and it was far from a given t
I wonder if #RustLang chose its #[name] attribute syntax precisely to avoid Rust snippets accidentally becoming hashtags on social media. Unlike, for example, C. #include and #define and #ifdef are lost causes as hashtags unless you _wanted
Related: on at least recent clang this triggers a Wmisleading-indentation warning on the meow() line, but IMO should not if(foo) bar(); else if(baz) foobar(); #ifdef ASDF meow(); #endif
What “ifdef” 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) →#ifdef across platforms
every network with a public tag surfaceFollow #ifdef 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/ifdef