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// the bump arena: interior pointers, a rewind, and a full bump.
fn main() {
let a = arena_new(32), p, q, r;
p = arena_alloc(a, 4);
p[0] = 7;
q = arena_alloc(a, 4);
put_n(q - p); put_c(' ');
put_n(p[0]); put_c(' ');
put_n(q[0]); put_c(' ');
arena_reset(a);
r = arena_alloc(a, 4);
put_n(r == p); put_c(' ');
put_n(arena_alloc(a, 100) == 0); put_c(10);
free(d*a);
return 0;
}
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