loxpp-interpreter/Token.cpp at main · ttheghost/loxpp-interpreter · GitHub

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#include "Token.h"

Token::Token(const TokenType type, const std::string &lexeme, const ObjPtr& literal, const unsigned int line, const unsigned int column): type(type), lexeme(lexeme), literal(literal), line(line), column(column) {}

Token::~Token() {}

std::string Token::toString() const {
  return std::visit(
    []<typename T>(T&& arg) -> std::string {
      using U = std::decay_t<T>;
      if constexpr (std::is_same_v<U, std::monostate>) {
        return "nil";
      } else if constexpr (std::is_same_v<U, Number>) {
        return arg.asString();
      } else if constexpr (std::is_same_v<U, std::string>) {
        return arg;
      } else if constexpr (std::is_same_v<U, std::shared_ptr<LoxCallable>>) {
        return "<Function>";
      } else { // std::is_same_v<T, bool>
        return arg ? "true" : "false";
      }
    },
    *literal
    );
}

std::ostream& operator<<(std::ostream& os, const Token &t) {
  os << "type: " << t.type << " lexeme: " << t.lexeme << " internal value: " << t.toString() << " pos: " << t.line << ":" << t.column;
  return os;
}

std::ostream &operator<<(std::ostream &os, const Object &obj) {
  os << std::visit(
    []<typename T>(T&& arg) -> std::string {
      using U = std::decay_t<T>;
      if constexpr (std::is_same_v<U, std::monostate>) {
        return "nil";
      } else if constexpr (std::is_same_v<U, Number>) {
        return arg.asString();
      }
      else if constexpr (std::is_same_v<U, std::string>) {
        return arg;
      } else if constexpr (std::is_same_v<U, std::shared_ptr<LoxCallable>>) {
        return arg->asString();
      } else { // std::is_same_v<T, bool>
        return arg ? "true" : "false";
      }
    },
    obj
    );
  return os;
}

std::ostream &operator<<(std::ostream &os, const ObjPtr &obj) {
  os << std::visit(
    []<typename T>(T&& arg) -> std::string {
      using U = std::decay_t<T>;
      if constexpr (std::is_same_v<U, std::monostate>) {
        return "nil";
      } else if constexpr (std::is_same_v<U, Number>) {
        return arg.asString();
      }
      else if constexpr (std::is_same_v<U, std::string>) {
        return arg;
      } else if constexpr (std::is_same_v<U, std::shared_ptr<LoxCallable>>) {
        return arg->asString();
      } else { // std::is_same_v<T, bool>
        return arg ? "true" : "false";
      }
    },
    *obj
    );
  return os;
}