node_t* mkmultinode(nodetype_t*t, node_t*one);
node_t* mknode1(nodetype_t*t, node_t*node);
node_t* mknode2(nodetype_t*t, node_t*left, node_t*right);
node_t* mkmultinode(nodetype_t*t, node_t*one);
node_t* mknode1(nodetype_t*t, node_t*node);
node_t* mknode2(nodetype_t*t, node_t*left, node_t*right);