Method findDuplicateSymbolPattern

src/core/objects/symbol_rule_set.cpp:394–414

const Symbol* SymbolRuleSet::findDuplicateSymbolPattern() const
{
	for (auto const& item : *this)
	{
		if (item.query.getOperator() != ObjectQuery::OperatorSymbol)
			continue;
		
		auto has_conflict = [&item](const auto& other)->bool {
			return &other != &item
			       && other.type != SymbolRule::NoAssignment
			       && item.query == other.query
			       && item.symbol != other.symbol;
		};
		using std::begin; using std::end;
		if (std::any_of(begin(*this), end(*this), has_conflict))
		{
			return item.symbol;
		}
	}
	return nullptr;
}