Class go_node

code/strings/aho_corasick.cpp:6–9

    out_node(string k, out_node *n)
      : keyword(k), next(n) { } };
  struct go_node {
    map<char, go_node*> next;
    out_node *out; go_node *fail;
    go_node() { out = NULL; fail = NULL; } };
  go_node *go;
  aho_corasick(vector<string> keywords) {
    go = new go_node();