IF_ARGS(9)

🎀 NAME 🎀

IF_ARGS — picks a token for you based on whether an optional argument list is there or not ✨

Okay so real talk, this is IF_ARGS(9), straight out of the Kernel API Manual — section 9, bestie, we are lowkey in the grown-up part of the docs 💅

---

🌸 SYNOPSIS 🌸

IF_ARGS (then , else , ... );

---

🦋 ARGUMENTS 🦋

• then — the token you get back when the arguments are actually present 🫶
• else — the token you get back when the arguments are empty, no cap 😭
• ... — the arguments to check, and yes they're optional, it's giving flexible 👑

---

✨ DESCRIPTION ✨

So here's the vibe: this macro lets you select a token based on whether that argument list is present or not. That's it, that's the whole flex. Presence check, token out, slay 💖

---

🔥 EXAMPLE 🔥

#define foo     X, Y
#define bar     IF_ARGS(Z, Q, foo)
#define buz     IF_ARGS(Z, Q, DROP_FIRST_ARG(FIRST_ARG(foo)))

With the definitions above, bar expands to Z while buz expands to Q. Like, look at them go, main character energy fr fr ⭐

---

💜 SEE ALSO 💜

Kernel file ./drivers/gpu/drm/xe/xe_args.h plus the whole squad: CALL_ARGS(9), DROP_FIRST_ARG(9), FIRST_ARG(9), LAST_ARG(9), PICK_ARG(9), ARGS_SEP_COMMA(9) — go read them, iykyk 🧚

---

ngl bestie, go check the source at ./drivers/gpu/drm/xe — that's where all this lives, and the page is dated October 2026 🌈💀 (yes, the future, don't ask). mwah, study up and stan the kernel 🍓👑