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- Pipeline diagram stacks vertically with downward arrows on mobile (row on >=720px) instead of the awkward wrap. - Tooltip cards now open on CLICK (works on touch too), the card itself is clickable and opens the symbol's page in a NEW TAB, and an outside click or Escape closes it. Replaces the hover-only behavior. - Reference pages get their own nav — Home / API Reference / Source ↗ — instead of the landing-only Features/Examples/Get started anchors, and now include the Source link. - Unify the container width (1120px) across the landing and all reference pages so the header and content align between them. - Reword extern/@export FFI docs from "C-ABI" to "native" for consistency with the site's no-C wording. Verified in-browser at 375px and 1280px: vertical pipeline, click→card→new-tab, outside-click close, correct reference nav, aligned container; 158 examples still compile. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
1.3 KiB
1.3 KiB
id: kw-extern name: extern category: structure kind: keyword tokens: extern sig: extern fn name(a: T) -> R = "symbol" tip: Bind a name to an external native symbol — the seam for platform and library calls. order: 12
An extern fn declares a function whose body lives outside Ludic and binds it to a native symbol resolved at link time. It is the seam through which Ludic reaches anything with a native interface — a system library, a math routine, or even another .ludic file compiled as a module. You write the Ludic signature you want to call and give the real symbol name after =; the linker connects them (pass -L/-l to ludicc to point at the library). Types must match the foreign ABI, so map each parameter and the return to the right Ludic type (int, fixed, ptr, …).
Parameters:
a— a typed argument passed straight through to the foreign symbol
program Physics {
extern fn c_hypot(a: fixed, b: fixed) -> fixed = "hypot_fx"
property Velocity { delta_x: int = 0, delta_y: int = 0 }
model Projectile { Velocity }
handler MeasureSpeed phase Update {
for (velocity) in query [Velocity, {Projectile}] {
let speed = c_hypot(a: fx(velocity.delta_x), b: fx(velocity.delta_y))
Screen.status(str(flr(speed)))
}
}
}