Parser Class

The Parser class is responsible for reading and parsing the simulation environment from a file. It takes a file name (passed from the command line) and provides a method to extract and return its content as a list of strings.

class Parser {
    public:
        
        Parser(int ac, const std::string &filename);
        
        std::vector<std::string> parseFile();
        
        ~Parser() = default;    
    
    private:
        std::string _filename;
};

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Attributes

// Stores the path of the file to parse
std::string _filename;

Methods

Constructor

Parser::Parser(int ac, const std::string &filename);

• Initializes the parser with a filename.
• The ac parameter represents the argument count passed from the command line
• Stores the filename to be used when calling parseFile().

Destructor

Parser::~Parser() = default;

• Uses the default destructor, as no manual memory management is needed.

Method

std::vector<std::string> Parser::parseFile()
{
    std::vector<std::string> map;
    //Opens the file given by _filename.
    std::ifstream file(_filename);

    //Throws an Error if the file can't be opened.
    if (!file.is_open()) {
        throw Error("Error : impossible to open the map's file");
        return map;
    }

    //Reads each non-empty line and adds it to a vector.
    std::string line;
    while (std::getline(file, line)) {
        if (!line.empty())
            map.push_back(line);
    }

    file.close();
    //Returns the vector of strings (the map).
    return map;
}

• Processes the file passed on the command line by loading and reading it.
• Returns a double array of std::string representing the map