#include "Token.h"

#include <iostream>

/**
 * Constructos, initialize the type, the string contents, and the integer
 * contents.
 */
Token::Token(const Type t, const string &s)
 : type(t), int_val(0), str_val(s) { }

Token::Token(const Type t, const int i)
 : type(t), int_val(i), str_val("") { }

Token::Token(const Token * const tok)
 : type(tok->type), int_val(tok->int_val), str_val(tok->str_val) { }

/**
 * Destructor, auto-filled.
 */
Token::~Token(void) { }

/**
 * Convert a token to a string.
 */
string &Token::appendToString(string &str) const {
    stringstream ss(str);
    ss << type << "(";
    if(type == INT) {
        ss << int_val << ")";
    } else {
        ss << str_val << ")";
    }
    str.assign(ss.str());
    return str;
}

/**
 * Overload output stream functions to support tokens and token types.
 */
ostream &operator<<(ostream &out, const Token * const token) {
    string ostr("");
    return out << token->appendToString(ostr);
}

ostream &operator<<(ostream &out, const Token &token) {
    string ostr("");
    return out << token.appendToString(ostr);
}

ostream &operator<<(ostream &is, const Token::Type type) {
    switch(type) {
        case Token::STRING: is << "STRING"; break;
        case Token::INT: is << "INT"; break;
        case Token::VARNAME: is << "VARNAME"; break;
        case Token::FUNCTION: is << "FUNCTION"; break;
        case Token::OPERATOR: is << "OPERATOR"; break;
    }
    return is;
}