//
// Created by lenfrex on 2023/4/13.
//

#ifndef LEXER_CPP_LEXER_H
#define LEXER_CPP_LEXER_H

#include <string>
#include <vector>
#include "Token.h"

class Lexer {
public:
    explicit Lexer(char *code);

    void lexAll();

    [[nodiscard]] const std::vector<Token> &getResults() const;

private:
    char *buffer;

    std::vector<Token> results = std::vector<Token>();

    bool stop = false;

    int currLine = 0;
    int currPos = 0;

    void lexNumber(Token &token);

    void lexIdentifier(Token &token);

    static std::string copyAsString(const char *sourceStart, int length);

    void setToken(Token &token, TokenType type, const char *source, int length);

    void setToken(Token &token, TokenType type, const std::string &content, int length);

    void move(int offset);

    void lexToken(Token &token);
};

#endif //LEXER_CPP_LEXER_H