alphabet.hpp

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#ifndef ALPHABET_HPP
#define ALPHABET_HPP
 
#include "symbol.hpp"
 
#include <iostream>
#include <set>
#include <string_view>
 
class Alphabet
{
  public:
    Alphabet() noexcept = default;
 
    explicit Alphabet(std::string_view str) noexcept(false) { this->insert(str); }
 
    explicit Alphabet(const std::set<Symbol> &symbols) noexcept(false) { this->insert(symbols); }
 
    [[nodiscard]] const std::set<Symbol> &get_set() const noexcept { return this->set_; }
 
    [[nodiscard]] std::size_t size() const noexcept { return this->set_.size(); }
 
    [[nodiscard]] bool contains(const Symbol &symbol) const noexcept
    {
        return this->set_.contains(symbol);
    }
 
    [[nodiscard]] auto begin() const noexcept { return this->set_.begin(); }
 
    [[nodiscard]] auto end() const noexcept { return this->set_.end(); }
 
    void print(std::ostream &os = std::cout) const noexcept;
 
    friend std::ostream &operator<<(std::ostream &os, const Alphabet &alphabet) noexcept;
 
  private:
    std::set<Symbol> set_; 
 
    template <class T> void insert(const T &data) noexcept(false);
};
 
template <class T> void Alphabet::insert(const T &data) noexcept(false)
{
    for (const auto &s : data)
    {
        this->set_.insert(Symbol(s));
    }
}
 
#endif // ALPHABET_HPP