bool ConditionalMetadata::EvalCondition(Game& game) const {
if (_condition.empty())
return true;
BOOST_LOG_TRIVIAL(trace) << "Evaluating condition: " << _condition;
auto cachedValue = game.GetCachedCondition(_condition);
if (cachedValue.second)
return cachedValue.first;
ConditionGrammar<std::string::const_iterator, boost::spirit::qi::space_type> grammar(&game);
boost::spirit::qi::space_type skipper;
std::string::const_iterator begin, end;
bool eval;
begin = _condition.begin();
end = _condition.end();
bool r;
try {
r = boost::spirit::qi::phrase_parse(begin, end, grammar, skipper, eval);
}
catch (std::exception& e) {
BOOST_LOG_TRIVIAL(error) << "Failed to parse condition \"" << _condition << "\": " << e.what();
throw loot::error(loot::error::condition_eval_fail, (boost::format(lc::translate("Failed to parse condition \"%1%\": %2%")) % _condition % e.what()).str());
}
if (!r || begin != end) {
BOOST_LOG_TRIVIAL(error) << "Failed to parse condition \"" << _condition << "\".";
throw loot::error(loot::error::condition_eval_fail, (boost::format(lc::translate("Failed to parse condition \"%1%\".")) % _condition).str());
}
game.CacheCondition(_condition, eval);
return eval;
}
