// ASM stream — the no-output `volatile` form runs end-to-end: a bare `nop`
// (no operands, no result) assembles and executes cleanly (exit 0). Confirms
// the no-output⇒volatile rule's positive side AND the zero-operand emit path.
nop :: () { asm volatile { "nop" }; }
main :: () { nop(); }