std::map<std::string, Variable> variables;

// Holds pointers to the vars in variables

// In order added

std::vector<Variable*> variable_added_list;

// in order of "access"

// That is, be the parameter to the function "access"

std::vector<Variable*> variable_access_list;

public:

VariableCollection(){};

// Returns true if a variable with that name exists

bool has(const std::string&) const;

// Checks to see if variable with that name exists

// If it does, return that variable, else throw FetlangException

Variable& get(const std::string&);

// Same as "get," but adds to the access list

Variable& access(const std::string&);

// Return last variable added, error if no variables added

Variable& getLastAdded();

// Return last variable accessed, error if no variables accessed

Variable& getLastAccessed();

// Dealing with pronouns and gender

// Retrieves the last variable that is of that gender, or of an unassigned gender

Variable& getLastOfGender(Gender, bool excluding_last = false);

// Like the previous method, but does not count the last added variable

Variable& getLastOfGenderExcludingLast(Gender);

// Checks if the previous two methods can occur without exception

bool hasLastOfGender(Gender, bool excluding_last = false);

// Like the previous method, but does not count the last added variable

bool hasLastOfGenderExcludingLast(Gender);

inline bool empty() { return variables.empty(); }

inline std::vector<Variable> getAll() const {

std::vector<Variable> output;

for (const auto& varpair : variables) {

output.push_back(varpair.second);

}

return output;

}

// Just add a variable

void add(const Variable&);

// Display as a list

void display();