else if ((macro = target_.defines_->find(symbol)) != target_.defines_->end())
            {
                preproc_define const &val = macro->second;
                size_t nb_arg = strings_.size() - token.stack_pos - 1;
                if (nb_arg != val.arguments.size())
                {
                    std::ostringstream error;
                    error << "preprocessor symbol '" << symbol << "' expects "
                          << val.arguments.size() << " arguments, but has "
                          << nb_arg << " arguments";
                    target_.error(error.str(), linenum_);
                }
                std::istringstream *buffer = new std::istringstream(val.value);
                std::map<std::string, std::string> *defines =
                    new std::map<std::string, std::string>;
                for (size_t i = 0; i < nb_arg; ++i) {
                    (*defines)[val.arguments[i]] = strings_[token.stack_pos + i + 1];
                }
                pop_token();
                std::string const &dir = directory_name(val.location.substr(0, val.location.find(' ')));
                if (!slowpath_) {
                    DBG_CF << "substituting macro " << symbol << '\n';
                    new preprocessor_data(target_, buffer, val.location, "",
                                          val.linenum, dir, val.textdomain, defines);
                } else {
                    DBG_CF << "substituting (slow) macro " << symbol << '\n';
                    std::ostringstream res;
                    preprocessor_streambuf *buf =
                        new preprocessor_streambuf(target_);
                    {   std::istream in(buf);
                        new preprocessor_data(*buf, buffer, val.location, "",
                                              val.linenum, dir, val.textdomain, defines);
                        res << in.rdbuf(); }
                    delete buf;
                    put(res.str());
                }
            }