#ifndef SCANNER_HH
#define SCANNER_HH

#include "token.hh"
#include <cstddef>
#include <vector>
#include <string>
#include <unordered_map>

struct Scanner {
  Scanner(const std::string &code);
  std::vector<Token> scan_tokens();
  bool is_at_end();
  bool is_digit(char c);
  bool is_alpha(char c);
  bool is_alphanumeric(char c);
  void scan_token();
  char advance();
  bool match(char expected);
  char peek();
  char peek_next();
  void add_token(TokenType type);
  void add_token(TokenType type, Object literal);
  void string();
  void number();
  void identifier();

  std::string code;
  std::vector<Token> tokens;
  std::size_t start, current, line;
  std::unordered_map<std::string, TokenType> keywords;
};

#endif