vector<string> Generator::Generate(string baseRule) const {
ComponentVector mainList;
ComponentVector tempList;
static std::random_device rd;
static std::mt19937 gen(rd());
{
const pair< RuleMap::const_iterator, RuleMap::const_iterator > &range = mpRuleset->GetRulesFor(baseRule);
std::pair< DistributionMap::const_iterator, DistributionMap::const_iterator > weightData = mpRuleset->GetWeightsFor(baseRule);
vector< float > weights = iterator_to_vector(weightData.first, weightData.second);
std::discrete_distribution<int> dist(weights.begin(), weights.end());
RuleMap::const_iterator it = range.first;
std::advance(it, dist(gen));
ComponentVector initial = it->second;
mainList = initial;
}
bool run;
do {
run = false;
tempList.clear();
for(ComponentVector::const_iterator it = mainList.begin(); it != mainList.end(); ++it) {
if(mpRuleset->IsTerminal(*it))
tempList.push_back(*it);
else {
run = true;
const pair< RuleMap::const_iterator, RuleMap::const_iterator > &rules = mpRuleset->GetRulesFor(*it);
if ( rules.first != rules.second ) {
// Fetch weights for the current to-be-decomposed rules
std::pair< DistributionMap::const_iterator, DistributionMap::const_iterator > ruleWeightData = mpRuleset->GetWeightsFor(*it);
vector< float > ruleWeights = iterator_to_vector(ruleWeightData.first, ruleWeightData.second);
// Setup distribution with the weights and choose a random rule to apply
std::discrete_distribution<int> dist(ruleWeights.begin(), ruleWeights.end());
RuleMap::const_iterator it = rules.first;
std::advance(it, dist(gen));
const ComponentVector &tobeadded = it->second;
tempList.insert(tempList.end(), tobeadded.begin(), tobeadded.end());
}
}
}
mainList = tempList;
} while(run);
return mainList;
}
/// \brief Add a set of components that we should consider relevant to the
/// container.
void addComponents(const ComponentVector &Components) {
// FIXME: add sort(on ID)+unique to avoid extra work.
for (ComponentVector::const_iterator I = Components.begin(),
E = Components.end(); I != E; ++I)
addComponent(*I);
}
