get_complication_score
int get_complication_score(struct expression *expr);
return get_complication_score(expr->left) +
get_complication_score(expr->right);
return get_complication_score(expr->unop);
return get_complication_score(expr->deref);
score = get_complication_score(expr);
if (get_complication_score(expr) > 2)