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#ifndef TRIE_H
#define TRIE_H
#include <iostream>
template <class T>
struct trie_node {
char c;
T* value = NULL;
trie_node<T>* next = nullptr;
trie_node<T>* child = nullptr;
trie_node (char c) : c(c) { };
trie_node (char c, trie_node<T>* next, trie_node<T>* child);
};
template <class T>
std::ostream& operator<<(std::ostream&, trie_node<T>* node);
template <class T>
struct trie {
trie_node<T>* root;
trie () : root (new trie_node<T> ('\0')) { }
int push_back (const char* key, const T&);
T& operator[] ( const char* key );
bool empty () { return this->root->child == NULL; }
};
template <class T>
std::ostream& operator<<(std::ostream&, trie<T>* trie);
#endif /* TRIE_H */
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