Method resolveImports

libsolidity/interface/CompilerStack.cpp:1389–1442

}

bool CompilerStack::resolveImports()
{
	solAssert(m_stackState == ParsedAndImported, "");

	// topological sorting (depth first search) of the import graph, cutting potential cycles
	std::vector<Source const*> sourceOrder;
	std::set<Source const*> sourcesSeen;

	std::function<void(Source const*)> toposort = [&](Source const* _source)
	{
		if (sourcesSeen.count(_source))
			return;
		sourcesSeen.insert(_source);
		solAssert(_source->ast);
		for (ASTPointer<ASTNode> const& node: _source->ast->nodes())
			if (ImportDirective const* import = dynamic_cast<ImportDirective*>(node.get()))
			{
				std::string const& path = *import->annotation().absolutePath;
				solAssert(m_sources.count(path), "");
				import->annotation().sourceUnit = m_sources[path].ast.get();
				toposort(&m_sources[path]);
			}
		sourceOrder.push_back(_source);
	};

	std::vector<PragmaDirective const*> experimentalPragmaDirectives;
	for (auto const& sourcePair: m_sources)
	{
		if (isRequestedSource(sourcePair.first))
			toposort(&sourcePair.second);
		if (sourcePair.second.ast && sourcePair.second.ast->experimentalSolidity())
			for (ASTPointer<ASTNode> const& node: sourcePair.second.ast->nodes())
				if (PragmaDirective const* pragma = dynamic_cast<PragmaDirective*>(node.get()))
					if (pragma->literals().size() >=2 && pragma->literals()[0] == "experimental" && pragma->literals()[1] == "solidity")
					{
						experimentalPragmaDirectives.push_back(pragma);
						break;
					}
	}

	if (!experimentalPragmaDirectives.empty() && experimentalPragmaDirectives.size() != m_sources.size())
	{
		for (auto &&pragma: experimentalPragmaDirectives)
			m_errorReporter.parserError(
					2141_error,
					pragma->location(),
					"File declares \"pragma experimental solidity\". If you want to enable the experimental mode, all source units must include the pragma."
			);
		return false;
	}

	swap(m_sourceOrder, sourceOrder);
	return true;
}

void CompilerStack::storeContractDefinitions()
{