scanner.hpp

#pragma once
#include <iostream>
#include <string>
#include <unordered_map>
#include <vector>
#include "token.hpp"
#include "debug.hpp"

class Scanner{
   private:
   int start = 0;
   int current =0;
   int line =1;
   std::string source;
   std::vector<Token> tokens;//1
   std::unordered_map<std::string,TokenType> keywords = {
   
   // Palavras-chave reservadas
{"and",    TokenType::AND},
{"class",  TokenType::CLASS},
{"else",   TokenType::ELSE},
{"false",  TokenType::MY_FALSE},
{"for",    TokenType::FOR},
{"fun",    TokenType::FUN},
{"if",     TokenType::IF},
{"nil",    TokenType::NIL},
{"or",     TokenType::OR},
{"print",  TokenType::PRINT},
{"return", TokenType::RETURN},
{"super",  TokenType::SUPER},
{"this",   TokenType::THIS},
{"true",   TokenType::MY_TRUE},
{"var",    TokenType::VAR},
{"while",  TokenType::WHILE} 
   };

bool isAlpha(char c);
bool isDigit(char c);
bool isAlphaNumeric(char c);
bool match(char expected);
void scanToken();
char advance();
void addToken(TokenType type);
void addToken(TokenType type, std::any literal);
char peek();
char peekNext();
void string();
void number();
void identifier();

public:
Scanner(const std::string&);
bool isAtEnd();
std::vector<Token> scanTokens();
};