string_hashing.h

#ifndef STRING_HASHING_H
#define STRING_HASHING_H
 
#ifdef __cplusplus
#include <functional>
#include <string>
#include <unordered_map>
#endif

class string_hasher {
  private:
    std::unordered_map<size_t, int> hash_table;
 
  public:
    explicit string_hasher() noexcept {}

    void insert(const std::string str) noexcept {
        size_t hashed = std::hash<std::string>{}(str);
        hash_table[hashed] = 1;
    }

    bool search(const std::string str) noexcept {
        size_t hashed = std::hash<std::string>{}(str);
        return hash_table[hashed] != 0;
    }

    unsigned long long size() { return hash_table.size(); }
};
 
#endif