NULL_NODE        1262 ext/syck/gram.c                     NULL_NODE( parser, n );
NULL_NODE        1639 ext/syck/gram.c                     NULL_NODE( parser, n );
NULL_NODE        1787 regcomp.c      	  en->target = NULL_NODE;
NULL_NODE        2575 regcomp.c        Node* n = NULL_NODE;
NULL_NODE        3104 regcomp.c        while ((np = NCDR(np)) != NULL_NODE) {
NULL_NODE        3115 regcomp.c          } while ((np = NCDR(np)) != NULL_NODE);
NULL_NODE        3262 regcomp.c        *rnode = var_anode = NULL_NODE;
NULL_NODE        3273 regcomp.c          *rnode = var_anode = onig_node_new_alt(NULL_NODE, NULL_NODE);
NULL_NODE        3280 regcomp.c          anode = onig_node_new_alt(NULL_NODE, NULL_NODE);
NULL_NODE        3285 regcomp.c          *rnode = anode = onig_node_new_alt(NULL_NODE, NULL_NODE);
NULL_NODE        3309 regcomp.c          an = onig_node_new_alt(NULL_NODE, NULL_NODE);
NULL_NODE        3325 regcomp.c      	xnode = onig_node_list_add(NULL_NODE, snode);
NULL_NODE        3383 regcomp.c        top_root = root = prev_node = snode = NULL_NODE;
NULL_NODE        3399 regcomp.c      	  top_root = root = onig_node_list_add(NULL_NODE, prev_node);
NULL_NODE        3424 regcomp.c      	top_root = root = onig_node_list_add(NULL_NODE, prev_node);
NULL_NODE        3455 regcomp.c            snode = NULL_NODE;
NULL_NODE        3468 regcomp.c            top_root = root = onig_node_list_add(NULL_NODE, prev_node);
NULL_NODE        3521 regcomp.c            Node* prev = NULL_NODE;
NULL_NODE        3665 regcomp.c            Node* prev = NULL_NODE;
NULL_NODE         937 regparse.c         env->mem_nodes_static[i] = NULL_NODE;
NULL_NODE         969 regparse.c     	p[i] = NULL_NODE;
NULL_NODE        1236 regparse.c       if (IS_NULL(n)) return NULL_NODE;
NULL_NODE        1333 regparse.c       NCALL(node)->target    = NULL_NODE;
NULL_NODE        1354 regparse.c       NQTFR(node)->head_exact        = NULL_NODE;
NULL_NODE        1355 regparse.c       NQTFR(node)->next_head_exact   = NULL_NODE;
NULL_NODE        1540 regparse.c       Node* n = NULL_NODE;
NULL_NODE        2242 regparse.c       c->target = NULL_NODE;
NULL_NODE        4194 regparse.c       *np = NULL_NODE;
NULL_NODE        5007 regparse.c         Node *snode = NULL_NODE;
NULL_NODE        5033 regparse.c           *(iarg->ptail) = onig_node_new_alt(snode, NULL_NODE);
NULL_NODE        5285 regparse.c     	iarg.alt_root = NULL_NODE;