paren_level
const struct paren_level *prev = state.prev_ps.paren.item,
const struct paren_level *prev = state.prev_ps.paren.item, *curr = ps.paren.item;
s->item[s->len++] = (struct paren_level){indent, cast};
struct paren_level *ps_paren_item = ps.paren.item;
struct paren_level *item;
int paren_level = 0;
paren_level++;
if (*p == ')' && --paren_level == 0) {
paren_level++; /* func(...) __printflike(...)
if (paren_level == 1 && p[0] == '*' && p[1] == ',')