Merge branch 'develop' into network

alethzero/MainWin.cpp

@@ -1626,7 +1626,7 @@ void Main::on_data_textChanged()
 			catch (dev::Exception const& exception)
 			{
 				ostringstream error;
-				solidity::SourceReferenceFormatter::printExceptionInformation(error, exception, "Error", compiler.getScanner());
+				solidity::SourceReferenceFormatter::printExceptionInformation(error, exception, "Error", compiler);
 				solidity = "<h4>Solidity</h4><pre>" + QString::fromStdString(error.str()).toHtmlEscaped() + "</pre>";
 			}
 			catch (...)

libp2p/Host.cpp

@@ -447,26 +447,31 @@ void Host::connect(std::shared_ptr<Node> const& _n)
 	_n->failedAttempts++;
 	m_ready -= _n->index;
 	bi::tcp::socket* s = new bi::tcp::socket(m_ioService);
-	s->async_connect(_n->address, [=](boost::system::error_code const& ec)
+
-	{
+	auto n = node(_n->id);
-		if (ec)
+	if (n)
-		{
+		s->async_connect(_n->address, [=](boost::system::error_code const& ec)
-			clog(NetConnect) << "Connection refused to node" << _n->id.abridged() << "@" << _n->address << "(" << ec.message() << ")";
-			_n->lastDisconnect = TCPError;
-			_n->lastAttempted = std::chrono::system_clock::now();
-			m_ready += _n->index;
-		}
-		else
 		{
-			clog(NetConnect) << "Connected to" << _n->id.abridged() << "@" << _n->address;
+			if (ec)
-			_n->lastConnected = std::chrono::system_clock::now();
+			{
-			auto p = make_shared<Session>(this, std::move(*s), node(_n->id), true);		// true because we don't care about ids matched for now. Once we have permenant IDs this will matter a lot more and we can institute a safer mechanism.
+				clog(NetConnect) << "Connection refused to node" << _n->id.abridged() << "@" << _n->address << "(" << ec.message() << ")";
-			p->start();
+				_n->lastDisconnect = TCPError;
-		}
+				_n->lastAttempted = std::chrono::system_clock::now();
-		delete s;
+				m_ready += _n->index;
-		Guard l(x_pendingNodeConns);
+			}
-		m_pendingNodeConns.erase(nptr);
+			else
-	});
+			{
+				clog(NetConnect) << "Connected to" << _n->id.abridged() << "@" << _n->address;
+				_n->lastConnected = std::chrono::system_clock::now();
+				auto p = make_shared<Session>(this, std::move(*s), n, true);		// true because we don't care about ids matched for now. Once we have permenant IDs this will matter a lot more and we can institute a safer mechanism.
+				p->start();
+			}
+			delete s;
+			Guard l(x_pendingNodeConns);
+			m_pendingNodeConns.erase(nptr);
+		});
+	else
+		clog(NetWarn) << "Trying to connect to node not in node table.";
 }
 
 bool Host::havePeer(NodeId _id) const

libsolidity/AST.cpp

@@ -33,6 +33,19 @@ namespace dev
 namespace solidity
 {
 
+void SourceUnit::accept(ASTVisitor& _visitor)
+{
+	if (_visitor.visit(*this))
+		listAccept(m_nodes, _visitor);
+	_visitor.endVisit(*this);
+}
+
+void ImportDirective::accept(ASTVisitor& _visitor)
+{
+	_visitor.visit(*this);
+	_visitor.endVisit(*this);
+}
+
 void ContractDefinition::accept(ASTVisitor& _visitor)
 {
 	if (_visitor.visit(*this))
@@ -57,34 +70,6 @@ void StructDefinition::checkValidityOfMembers()
 	checkRecursion();
 }
 
-void StructDefinition::checkMemberTypes()
-{
-	for (ASTPointer<VariableDeclaration> const& member: getMembers())
-		if (!member->getType()->canBeStored())
-			BOOST_THROW_EXCEPTION(member->createTypeError("Type cannot be used in struct."));
-}
-
-void StructDefinition::checkRecursion()
-{
-	set<StructDefinition const*> definitionsSeen;
-	vector<StructDefinition const*> queue = {this};
-	while (!queue.empty())
-	{
-		StructDefinition const* def = queue.back();
-		queue.pop_back();
-		if (definitionsSeen.count(def))
-			BOOST_THROW_EXCEPTION(ParserError() << errinfo_sourceLocation(def->getLocation())
-												<< errinfo_comment("Recursive struct definition."));
-		definitionsSeen.insert(def);
-		for (ASTPointer<VariableDeclaration> const& member: def->getMembers())
-			if (member->getType()->getCategory() == Type::Category::STRUCT)
-			{
-				UserDefinedTypeName const& typeName = dynamic_cast<UserDefinedTypeName&>(*member->getTypeName());
-				queue.push_back(&dynamic_cast<StructDefinition const&>(*typeName.getReferencedDeclaration()));
-			}
-	}
-}
-
 void ParameterList::accept(ASTVisitor& _visitor)
 {
 	if (_visitor.visit(*this))
@@ -312,6 +297,34 @@ vector<FunctionDefinition const*> ContractDefinition::getInterfaceFunctions() co
 	return exportedFunctions;
 }
 
+void StructDefinition::checkMemberTypes()
+{
+	for (ASTPointer<VariableDeclaration> const& member: getMembers())
+		if (!member->getType()->canBeStored())
+			BOOST_THROW_EXCEPTION(member->createTypeError("Type cannot be used in struct."));
+}
+
+void StructDefinition::checkRecursion()
+{
+	set<StructDefinition const*> definitionsSeen;
+	vector<StructDefinition const*> queue = {this};
+	while (!queue.empty())
+	{
+		StructDefinition const* def = queue.back();
+		queue.pop_back();
+		if (definitionsSeen.count(def))
+			BOOST_THROW_EXCEPTION(ParserError() << errinfo_sourceLocation(def->getLocation())
+												<< errinfo_comment("Recursive struct definition."));
+		definitionsSeen.insert(def);
+		for (ASTPointer<VariableDeclaration> const& member: def->getMembers())
+			if (member->getType()->getCategory() == Type::Category::STRUCT)
+			{
+				UserDefinedTypeName const& typeName = dynamic_cast<UserDefinedTypeName&>(*member->getTypeName());
+				queue.push_back(&dynamic_cast<StructDefinition const&>(*typeName.getReferencedDeclaration()));
+			}
+	}
+}
+
 void FunctionDefinition::checkTypeRequirements()
 {
 	for (ASTPointer<VariableDeclaration> const& var: getParameters() + getReturnParameters())

libsolidity/AST.h

@@ -79,6 +79,42 @@ private:
 	Location m_location;
 };
 
+/**
+ * Source unit containing import directives and contract definitions.
+ */
+class SourceUnit: public ASTNode
+{
+public:
+	SourceUnit(Location const& _location, std::vector<ASTPointer<ASTNode>> const& _nodes):
+		ASTNode(_location), m_nodes(_nodes) {}
+
+	virtual void accept(ASTVisitor& _visitor) override;
+
+	std::vector<ASTPointer<ASTNode>> getNodes() const { return m_nodes; }
+
+private:
+	std::vector<ASTPointer<ASTNode>> m_nodes;
+};
+
+/**
+ * Import directive for referencing other files / source objects.
+ * Example: import "abc.sol"
+ * Source objects are identified by a string which can be a file name but does not have to be.
+ */
+class ImportDirective: public ASTNode
+{
+public:
+	ImportDirective(Location const& _location, ASTPointer<ASTString> const& _identifier):
+		ASTNode(_location), m_identifier(_identifier) {}
+
+	virtual void accept(ASTVisitor& _visitor) override;
+
+	ASTString const& getIdentifier() const { return *m_identifier; }
+
+private:
+	ASTPointer<ASTString> m_identifier;
+};
+
 /**
  * Abstract AST class for a declaration (contract, function, struct, variable).
  */

libsolidity/ASTForward.h

@@ -34,6 +34,8 @@ namespace solidity
 {
 
 class ASTNode;
+class SourceUnit;
+class ImportDirective;
 class Declaration;
 class ContractDefinition;
 class StructDefinition;

libsolidity/ASTPrinter.cpp

@@ -43,6 +43,13 @@ void ASTPrinter::print(ostream& _stream)
 }
 
 
+bool ASTPrinter::visit(ImportDirective& _node)
+{
+	writeLine("ImportDirective \"" + _node.getIdentifier() + "\"");
+	printSourcePart(_node);
+	return goDeeper();
+}
+
 bool ASTPrinter::visit(ContractDefinition& _node)
 {
 	writeLine("ContractDefinition \"" + _node.getName() + "\"");
@@ -270,7 +277,7 @@ bool ASTPrinter::visit(Literal& _node)
 	return goDeeper();
 }
 
-void ASTPrinter::endVisit(ASTNode&)
+void ASTPrinter::endVisit(ImportDirective&)
 {
 	m_indentation--;
 }

libsolidity/ASTPrinter.h

@@ -42,6 +42,7 @@ public:
 	/// Output the string representation of the AST to _stream.
 	void print(std::ostream& _stream);
 
+	bool visit(ImportDirective& _node) override;
 	bool visit(ContractDefinition& _node) override;
 	bool visit(StructDefinition& _node) override;
 	bool visit(ParameterList& _node) override;
@@ -73,7 +74,7 @@ public:
 	bool visit(ElementaryTypeNameExpression& _node) override;
 	bool visit(Literal& _node) override;
 
-	void endVisit(ASTNode& _node) override;
+	void endVisit(ImportDirective&) override;
 	void endVisit(ContractDefinition&) override;
 	void endVisit(StructDefinition&) override;
 	void endVisit(ParameterList&) override;

libsolidity/ASTVisitor.h

@@ -42,6 +42,8 @@ class ASTVisitor
 {
 public:
 	virtual bool visit(ASTNode&) { return true; }
+	virtual bool visit(SourceUnit&) { return true; }
+	virtual bool visit(ImportDirective&) { return true; }
 	virtual bool visit(ContractDefinition&) { return true; }
 	virtual bool visit(StructDefinition&) { return true; }
 	virtual bool visit(ParameterList&) { return true; }
@@ -74,6 +76,8 @@ public:
 	virtual bool visit(Literal&) { return true; }
 
 	virtual void endVisit(ASTNode&) { }
+	virtual void endVisit(SourceUnit&) { }
+	virtual void endVisit(ImportDirective&) { }
 	virtual void endVisit(ContractDefinition&) { }
 	virtual void endVisit(StructDefinition&) { }
 	virtual void endVisit(ParameterList&) { }

libsolidity/BaseTypes.h

@@ -22,6 +22,8 @@
 
 #pragma once
 
+#include <memory>
+#include <string>
 #include <ostream>
 
 namespace dev
@@ -35,19 +37,19 @@ namespace solidity
  */
 struct Location
 {
-	Location(int _start, int _end): start(_start), end(_end) { }
+	Location(int _start, int _end, std::shared_ptr<std::string const> _sourceName):
+		start(_start), end(_end), sourceName(_sourceName) { }
 	Location(): start(-1), end(-1) { }
 
-	bool IsValid() const { return start >= 0 && end >= start; }
-
 	int start;
 	int end;
+	std::shared_ptr<std::string const> sourceName;
 };
 
 /// Stream output for Location (used e.g. in boost exceptions).
 inline std::ostream& operator<<(std::ostream& _out, Location const& _location)
 {
-	return _out << "[" << _location.start << "," << _location.end << ")";
+	return _out << *_location.sourceName << "[" << _location.start << "," << _location.end << ")";
 }
 
 }

libsolidity/CompilerStack.cpp

@@ -36,22 +36,43 @@ namespace dev
 namespace solidity
 {
 
-CompilerStack::CompilerStack(): m_interfaceHandler(make_shared<InterfaceHandler>()) {}
+void CompilerStack::addSource(string const& _name, string const& _content)
+{
+	if (m_sources.count(_name))
+		BOOST_THROW_EXCEPTION(CompilerError() << errinfo_comment("Source by given name already exists."));
+
+	reset(true);
+	m_sources[_name].scanner = make_shared<Scanner>(CharStream(_content), _name);
+}
 
 void CompilerStack::setSource(string const& _sourceCode)
 {
 	reset();
-	m_scanner = make_shared<Scanner>(CharStream(_sourceCode));
+	addSource("", _sourceCode);
 }
 
 void CompilerStack::parse()
 {
-	if (!m_scanner)
+	for (auto& sourcePair: m_sources)
-		BOOST_THROW_EXCEPTION(CompilerError() << errinfo_comment("Source not available."));
+	{
-	m_contractASTNode = Parser().parse(m_scanner);
+		sourcePair.second.scanner->reset();
+		sourcePair.second.ast = Parser().parse(sourcePair.second.scanner);
+	}
+	resolveImports();
+
 	m_globalContext = make_shared<GlobalContext>();
-	m_globalContext->setCurrentContract(*m_contractASTNode);
+	NameAndTypeResolver resolver(m_globalContext->getDeclarations());
-	NameAndTypeResolver(m_globalContext->getDeclarations()).resolveNamesAndTypes(*m_contractASTNode);
+	for (Source const* source: m_sourceOrder)
+		resolver.registerDeclarations(*source->ast);
+	for (Source const* source: m_sourceOrder)
+		for (ASTPointer<ASTNode> const& node: source->ast->getNodes())
+			if (ContractDefinition* contract = dynamic_cast<ContractDefinition*>(node.get()))
+			{
+				m_globalContext->setCurrentContract(*contract);
+				resolver.updateDeclaration(*m_globalContext->getCurrentThis());
+				resolver.resolveNamesAndTypes(*contract);
+				m_contracts[contract->getName()].contract = contract;
+			}
 	m_parseSuccessful = true;
 }
 
@@ -61,54 +82,90 @@ void CompilerStack::parse(string const& _sourceCode)
 	parse();
 }
 
-bytes const& CompilerStack::compile(bool _optimize)
+vector<string> CompilerStack::getContractNames()
 {
 	if (!m_parseSuccessful)
 		BOOST_THROW_EXCEPTION(CompilerError() << errinfo_comment("Parsing was not successful."));
-	m_bytecode.clear();
+	vector<string> contractNames;
-	m_compiler = make_shared<Compiler>();
+	for (auto const& contract: m_contracts)
-	m_compiler->compileContract(*m_contractASTNode, m_globalContext->getMagicVariables());
+		contractNames.push_back(contract.first);
-	return m_bytecode = m_compiler->getAssembledBytecode(_optimize);
+	return contractNames;
+}
+
+void CompilerStack::compile(bool _optimize)
+{
+	if (!m_parseSuccessful)
+		parse();
+	for (Source const* source: m_sourceOrder)
+		for (ASTPointer<ASTNode> const& node: source->ast->getNodes())
+			if (ContractDefinition* contract = dynamic_cast<ContractDefinition*>(node.get()))
+			{
+				m_globalContext->setCurrentContract(*contract);
+				shared_ptr<Compiler> compiler = make_shared<Compiler>();
+				compiler->compileContract(*contract, m_globalContext->getMagicVariables());
+				Contract& compiledContract = m_contracts[contract->getName()];
+				compiledContract.bytecode = compiler->getAssembledBytecode(_optimize);
+				compiledContract.compiler = move(compiler);
+			}
 }
 
 bytes const& CompilerStack::compile(string const& _sourceCode, bool _optimize)
 {
 	parse(_sourceCode);
-	return compile(_optimize);
+	compile(_optimize);
+	return getBytecode();
 }
 
-void CompilerStack::streamAssembly(ostream& _outStream)
+bytes const& CompilerStack::getBytecode(string const& _contractName)
 {
-	if (!m_compiler || m_bytecode.empty())
+	return getContract(_contractName).bytecode;
-		BOOST_THROW_EXCEPTION(CompilerError() << errinfo_comment("Compilation was not successful."));
-	m_compiler->streamAssembly(_outStream);
 }
 
-std::string const& CompilerStack::getJsonDocumentation(DocumentationType _type)
+void CompilerStack::streamAssembly(ostream& _outStream, string const& _contractName)
+{
+	getContract(_contractName).compiler->streamAssembly(_outStream);
+}
+
+string const& CompilerStack::getInterface(std::string const& _contractName)
+{
+	return getJsonDocumentation(_contractName, DocumentationType::ABI_INTERFACE);
+}
+
+std::string const& CompilerStack::getJsonDocumentation(std::string const& _contractName, DocumentationType _type)
 {
 	if (!m_parseSuccessful)
 		BOOST_THROW_EXCEPTION(CompilerError() << errinfo_comment("Parsing was not successful."));
 
-	auto createDocIfNotThere = [this, _type](std::unique_ptr<string>& _doc)
+	Contract& contract = getContract(_contractName);
-	{
-		if (!_doc)
-			_doc = m_interfaceHandler->getDocumentation(m_contractASTNode, _type);
-	};
 
+	std::unique_ptr<string>* doc;
 	switch (_type)
 	{
 	case DocumentationType::NATSPEC_USER:
-		createDocIfNotThere(m_userDocumentation);
+		doc = &contract.userDocumentation;
-		return *m_userDocumentation;
+		break;
 	case DocumentationType::NATSPEC_DEV:
-		createDocIfNotThere(m_devDocumentation);
+		doc = &contract.devDocumentation;
-		return *m_devDocumentation;
+		break;
 	case DocumentationType::ABI_INTERFACE:
-		createDocIfNotThere(m_interface);
+		doc = &contract.interface;
-		return *m_interface;
+		break;
+	default:
+		BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Illegal documentation type."));
 	}
+	if (!*doc)
+		*doc = contract.interfaceHandler->getDocumentation(*contract.contract, _type);
+	return *(*doc);
+}
 
-	BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Illegal documentation type."));
+Scanner const& CompilerStack::getScanner(string const& _sourceName)
+{
+	return *getSource(_sourceName).scanner;
+}
+
+SourceUnit& CompilerStack::getAST(string const& _sourceName)
+{
+	return *getSource(_sourceName).ast;
 }
 
 bytes CompilerStack::staticCompile(std::string const& _sourceCode, bool _optimize)
@@ -117,7 +174,70 @@ bytes CompilerStack::staticCompile(std::string const& _sourceCode, bool _optimiz
 	return stack.compile(_sourceCode, _optimize);
 }
 
+void CompilerStack::reset(bool _keepSources)
+{
+	m_parseSuccessful = false;
+	if (_keepSources)
+		for (auto sourcePair: m_sources)
+			sourcePair.second.reset();
+	else
+		m_sources.clear();
+	m_globalContext.reset();
+	m_sourceOrder.clear();
+	m_contracts.clear();
+}
+
+void CompilerStack::resolveImports()
+{
+	// topological sorting (depth first search) of the import graph, cutting potential cycles
+	vector<Source const*> sourceOrder;
+	set<Source const*> sourcesSeen;
+
+	function<void(Source const*)> toposort = [&](Source const* _source)
+	{
+		if (sourcesSeen.count(_source))
+			return;
+		sourcesSeen.insert(_source);
+		for (ASTPointer<ASTNode> const& node: _source->ast->getNodes())
+			if (ImportDirective const* import = dynamic_cast<ImportDirective*>(node.get()))
+			{
+				string const& id = import->getIdentifier();
+				if (!m_sources.count(id))
+					BOOST_THROW_EXCEPTION(ParserError()
+										  << errinfo_sourceLocation(import->getLocation())
+										  << errinfo_comment("Source not found."));
+				toposort(&m_sources[id]);
+			}
+		sourceOrder.push_back(_source);
+	};
+
+	for (auto const& sourcePair: m_sources)
+		toposort(&sourcePair.second);
+
+	swap(m_sourceOrder, sourceOrder);
+}
+
+CompilerStack::Contract& CompilerStack::getContract(string const& _contractName)
+{
+	if (m_contracts.empty())
+		BOOST_THROW_EXCEPTION(CompilerError() << errinfo_comment("No compiled contracts found."));
+	if (_contractName.empty())
+		return m_contracts.begin()->second;
+	auto it = m_contracts.find(_contractName);
+	if (it == m_contracts.end())
+		BOOST_THROW_EXCEPTION(CompilerError() << errinfo_comment("Contract " + _contractName + " not found."));
+	return it->second;
+}
+
+CompilerStack::Source& CompilerStack::getSource(string const& _sourceName)
+{
+	auto it = m_sources.find(_sourceName);
+	if (it == m_sources.end())
+		BOOST_THROW_EXCEPTION(CompilerError() << errinfo_comment("Given source file not found."));
+	return it->second;
+}
 
+CompilerStack::Contract::Contract(): interfaceHandler(make_shared<InterfaceHandler>()) {}
 
 }
 }

libsolidity/CompilerStack.h

@@ -25,6 +25,7 @@
 #include <ostream>
 #include <string>
 #include <memory>
+#include <boost/noncopyable.hpp>
 #include <libdevcore/Common.h>
 
 namespace dev {
@@ -33,6 +34,7 @@ namespace solidity {
 // forward declarations
 class Scanner;
 class ContractDefinition;
+class SourceUnit;
 class Compiler;
 class GlobalContext;
 class InterfaceHandler;
@@ -49,52 +51,85 @@ enum class DocumentationType: uint8_t
  * It holds state and can be used to either step through the compilation stages (and abort e.g.
  * before compilation to bytecode) or run the whole compilation in one call.
  */
-class CompilerStack
+class CompilerStack: boost::noncopyable
 {
 public:
-	CompilerStack();
+	CompilerStack(): m_parseSuccessful(false) {}
-	void reset() {  *this = CompilerStack(); }
+
+	/// Adds a source object (e.g. file) to the parser. After this, parse has to be called again.
+	void addSource(std::string const& _name, std::string const& _content);
 	void setSource(std::string const& _sourceCode);
+	/// Parses all source units that were added
 	void parse();
+	/// Sets the given source code as the only source unit and parses it.
 	void parse(std::string const& _sourceCode);
-	/// Compiles the contract that was previously parsed.
+	/// Returns a list of the contract names in the sources.
-	bytes const& compile(bool _optimize = false);
+	std::vector<std::string> getContractNames();
+
+	/// Compiles the source units that were previously added and parsed.
+	void compile(bool _optimize = false);
 	/// Parses and compiles the given source code.
+	/// @returns the compiled bytecode
 	bytes const& compile(std::string const& _sourceCode, bool _optimize = false);
 
-	bytes const& getBytecode() const { return m_bytecode; }
+	bytes const& getBytecode(std::string const& _contractName = "");
 	/// Streams a verbose version of the assembly to @a _outStream.
 	/// Prerequisite: Successful compilation.
-	void streamAssembly(std::ostream& _outStream);
+	void streamAssembly(std::ostream& _outStream, std::string const& _contractName = "");
 
 	/// Returns a string representing the contract interface in JSON.
 	/// Prerequisite: Successful call to parse or compile.
-	std::string const& getInterface();
+	std::string const& getInterface(std::string const& _contractName = "");
 	/// Returns a string representing the contract's documentation in JSON.
 	/// Prerequisite: Successful call to parse or compile.
 	/// @param type The type of the documentation to get.
-	/// Can be one of 3 types defined at @c documentation_type
+	/// Can be one of 3 types defined at @c DocumentationType
-	std::string const& getJsonDocumentation(DocumentationType type);
+	std::string const& getJsonDocumentation(std::string const& _contractName, DocumentationType _type);
 
 	/// Returns the previously used scanner, useful for counting lines during error reporting.
-	Scanner const& getScanner() const { return *m_scanner; }
+	Scanner const& getScanner(std::string const& _sourceName = "");
-	ContractDefinition& getAST() const { return *m_contractASTNode; }
+	SourceUnit& getAST(std::string const& _sourceName = "");
 
 	/// Compile the given @a _sourceCode to bytecode. If a scanner is provided, it is used for
 	/// scanning the source code - this is useful for printing exception information.
 	static bytes staticCompile(std::string const& _sourceCode, bool _optimize = false);
 
 private:
-	std::shared_ptr<Scanner> m_scanner;
+	/**
-	std::shared_ptr<GlobalContext> m_globalContext;
+	 * Information pertaining to one source unit, filled gradually during parsing and compilation.
-	std::shared_ptr<ContractDefinition> m_contractASTNode;
+	 */
+	struct Source
+	{
+		std::shared_ptr<Scanner> scanner;
+		std::shared_ptr<SourceUnit> ast;
+		std::string interface;
+		void reset() { scanner.reset(); ast.reset(); interface.clear(); }
+	};
+
+	struct Contract
+	{
+		ContractDefinition* contract;
+		std::shared_ptr<Compiler> compiler;
+		bytes bytecode;
+		std::shared_ptr<InterfaceHandler> interfaceHandler;
+		std::unique_ptr<std::string> interface;
+		std::unique_ptr<std::string> userDocumentation;
+		std::unique_ptr<std::string> devDocumentation;
+
+		Contract();
+	};
+
+	void reset(bool _keepSources = false);
+	void resolveImports();
+
+	Contract& getContract(std::string const& _contractName = "");
+	Source& getSource(std::string const& _sourceName = "");
+
 	bool m_parseSuccessful;
-	std::unique_ptr<std::string> m_interface;
+	std::map<std::string, Source> m_sources;
-	std::unique_ptr<std::string> m_userDocumentation;
+	std::shared_ptr<GlobalContext> m_globalContext;
-	std::unique_ptr<std::string> m_devDocumentation;
+	std::vector<Source const*> m_sourceOrder;
-	std::shared_ptr<Compiler> m_compiler;
+	std::map<std::string, Contract> m_contracts;
-	std::shared_ptr<InterfaceHandler> m_interfaceHandler;
-	bytes m_bytecode;
 };
 
 }

libsolidity/DeclarationContainer.cpp

@@ -28,9 +28,9 @@ namespace dev
 namespace solidity
 {
 
-bool DeclarationContainer::registerDeclaration(Declaration& _declaration)
+bool DeclarationContainer::registerDeclaration(Declaration& _declaration, bool _update)
 {
-	if (m_declarations.find(_declaration.getName()) != m_declarations.end())
+	if (!_update && m_declarations.find(_declaration.getName()) != m_declarations.end())
 		return false;
 	m_declarations[_declaration.getName()] = &_declaration;
 	return true;

libsolidity/DeclarationContainer.h

@@ -43,7 +43,7 @@ public:
 		m_enclosingDeclaration(_enclosingDeclaration), m_enclosingContainer(_enclosingContainer) {}
 	/// Registers the declaration in the scope unless its name is already declared. Returns true iff
 	/// it was not yet declared.
-	bool registerDeclaration(Declaration& _declaration);
+	bool registerDeclaration(Declaration& _declaration, bool _update = false);
 	Declaration* resolveName(ASTString const& _name, bool _recursive = false) const;
 	Declaration* getEnclosingDeclaration() const { return m_enclosingDeclaration; }
 

libsolidity/Exceptions.h

@@ -38,7 +38,6 @@ struct CompilerError: virtual Exception {};
 struct InternalCompilerError: virtual Exception {};
 struct DocstringParsingError: virtual Exception {};
 
-typedef boost::error_info<struct tag_sourcePosition, int> errinfo_sourcePosition;
 typedef boost::error_info<struct tag_sourceLocation, Location> errinfo_sourceLocation;
 
 }

libsolidity/ExpressionCompiler.cpp

@@ -185,7 +185,9 @@ bool ExpressionCompiler::visit(FunctionCall& _functionCall)
 		if (asserts(arguments.size() == function.getParameterTypes().size()))
 			BOOST_THROW_EXCEPTION(InternalCompilerError());
 
-		if (function.getLocation() == Location::INTERNAL)
+		switch (function.getLocation())
+		{
+		case Location::INTERNAL:
 		{
 			// Calling convention: Caller pushes return address and arguments
 			// Callee removes them and pushes return values
@@ -208,61 +210,90 @@ bool ExpressionCompiler::visit(FunctionCall& _functionCall)
 			// all others
 			for (unsigned i = 1; i < function.getReturnParameterTypes().size(); ++i)
 				m_context << eth::Instruction::POP;
+			break;
 		}
-		else if (function.getLocation() == Location::EXTERNAL)
+		case Location::EXTERNAL:
-			BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("External function calls not implemented yet."));
-		else
 		{
-			switch (function.getLocation())
+			unsigned dataOffset = 1; // reserve one byte for the function index
-			{
+			for (unsigned i = 0; i < arguments.size(); ++i)
-			case Location::SEND:
-				m_context << u256(0) << u256(0) << u256(0) << u256(0);
-				arguments.front()->accept(*this);
-				//@todo might not be necessary
-				appendTypeConversion(*arguments.front()->getType(), *function.getParameterTypes().front(), true);
-				_functionCall.getExpression().accept(*this);
-				m_context << u256(25) << eth::Instruction::GAS << eth::Instruction::SUB
-						  << eth::Instruction::CALL
-						  << eth::Instruction::POP;
-				break;
-			case Location::SUICIDE:
-				arguments.front()->accept(*this);
-				//@todo might not be necessary
-				appendTypeConversion(*arguments.front()->getType(), *function.getParameterTypes().front(), true);
-				m_context << eth::Instruction::SUICIDE;
-				break;
-			case Location::SHA3:
-				arguments.front()->accept(*this);
-				appendTypeConversion(*arguments.front()->getType(), *function.getParameterTypes().front(), true);
-				// @todo move this once we actually use memory
-				m_context << u256(0) << eth::Instruction::MSTORE << u256(32) << u256(0) << eth::Instruction::SHA3;
-				break;
-			case Location::ECRECOVER:
-			case Location::SHA256:
-			case Location::RIPEMD160:
 			{
-				static const map<Location, u256> contractAddresses{{Location::ECRECOVER, 1},
+				arguments[i]->accept(*this);
-																   {Location::SHA256, 2},
+				Type const& type = *function.getParameterTypes()[i];
-																   {Location::RIPEMD160, 3}};
+				appendTypeConversion(*arguments[i]->getType(), type);
-				u256 contractAddress = contractAddresses.find(function.getLocation())->second;
+				unsigned const numBytes = type.getCalldataEncodedSize();
-				// @todo later, combine this code with external function call
+				if (numBytes == 0 || numBytes > 32)
-				for (unsigned i = 0; i < arguments.size(); ++i)
+					BOOST_THROW_EXCEPTION(CompilerError()
-				{
+										  << errinfo_sourceLocation(arguments[i]->getLocation())
-					arguments[i]->accept(*this);
+										  << errinfo_comment("Type " + type.toString() + " not yet supported."));
-					appendTypeConversion(*arguments[i]->getType(), *function.getParameterTypes()[i], true);
+				if (numBytes != 32)
-					// @todo move this once we actually use memory
+					m_context << (u256(1) << ((32 - numBytes) * 8)) << eth::Instruction::MUL;
-					m_context << u256(i * 32) << eth::Instruction::MSTORE;
+				m_context << u256(dataOffset) << eth::Instruction::MSTORE;
-				}
+				dataOffset += numBytes;
-				m_context << u256(32) << u256(0) << u256(arguments.size() * 32) << u256(0) << u256(0)
-						  << contractAddress << u256(500) //@todo determine actual gas requirement
-						  << eth::Instruction::CALL
-						  << eth::Instruction::POP
-						  << u256(0) << eth::Instruction::MLOAD;
-				break;
 			}
-			default:
+			//@todo only return the first return value for now
-				BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Function not yet implemented."));
+			unsigned retSize = function.getReturnParameterTypes().empty() ? 0
+									: function.getReturnParameterTypes().front()->getCalldataEncodedSize();
+			// CALL arguments: outSize, outOff, inSize, inOff, value, addr, gas (stack top)
+			m_context << u256(retSize) << u256(0) << u256(dataOffset) << u256(0) << u256(0);
+			_functionCall.getExpression().accept(*this); // pushes addr and function index
+			m_context << u256(0) << eth::Instruction::MSTORE8
+					  << u256(25) << eth::Instruction::GAS << eth::Instruction::SUB
+					  << eth::Instruction::CALL
+					  << eth::Instruction::POP; // @todo do not ignore failure indicator
+			if (retSize == 32)
+				m_context << u256(0) << eth::Instruction::MLOAD;
+			else if (retSize > 0)
+				m_context << (u256(1) << ((32 - retSize) * 8))
+						  << u256(0) << eth::Instruction::MLOAD << eth::Instruction::DIV;
+			break;
+		}
+		case Location::SEND:
+			m_context << u256(0) << u256(0) << u256(0) << u256(0);
+			arguments.front()->accept(*this);
+			//@todo might not be necessary
+			appendTypeConversion(*arguments.front()->getType(), *function.getParameterTypes().front(), true);
+			_functionCall.getExpression().accept(*this);
+			m_context << u256(25) << eth::Instruction::GAS << eth::Instruction::SUB
+					  << eth::Instruction::CALL
+					  << eth::Instruction::POP;
+			break;
+		case Location::SUICIDE:
+			arguments.front()->accept(*this);
+			//@todo might not be necessary
+			appendTypeConversion(*arguments.front()->getType(), *function.getParameterTypes().front(), true);
+			m_context << eth::Instruction::SUICIDE;
+			break;
+		case Location::SHA3:
+			arguments.front()->accept(*this);
+			appendTypeConversion(*arguments.front()->getType(), *function.getParameterTypes().front(), true);
+			// @todo move this once we actually use memory
+			m_context << u256(0) << eth::Instruction::MSTORE << u256(32) << u256(0) << eth::Instruction::SHA3;
+			break;
+		case Location::ECRECOVER:
+		case Location::SHA256:
+		case Location::RIPEMD160:
+		{
+			static const map<Location, u256> contractAddresses{{Location::ECRECOVER, 1},
+															   {Location::SHA256, 2},
+															   {Location::RIPEMD160, 3}};
+			u256 contractAddress = contractAddresses.find(function.getLocation())->second;
+			// @todo later, combine this code with external function call
+			for (unsigned i = 0; i < arguments.size(); ++i)
+			{
+				arguments[i]->accept(*this);
+				appendTypeConversion(*arguments[i]->getType(), *function.getParameterTypes()[i], true);
+				// @todo move this once we actually use memory
+				m_context << u256(i * 32) << eth::Instruction::MSTORE;
 			}
+			m_context << u256(32) << u256(0) << u256(arguments.size() * 32) << u256(0) << u256(0)
+					  << contractAddress << u256(500) //@todo determine actual gas requirement
+					  << eth::Instruction::CALL
+					  << eth::Instruction::POP
+					  << u256(0) << eth::Instruction::MLOAD;
+			break;
+		}
+		default:
+			BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Invalid function type."));
 		}
 	}
 	return false;
@@ -289,9 +320,11 @@ void ExpressionCompiler::endVisit(MemberAccess& _memberAccess)
 			BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Invalid member access to integer."));
 		break;
 	case Type::Category::CONTRACT:
-		// call function
+	{
-		BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Contract variables not yet implemented."));
+		ContractType const& type = dynamic_cast<ContractType const&>(*_memberAccess.getExpression().getType());
+		m_context << type.getFunctionIndex(member);
 		break;
+	}
 	case Type::Category::MAGIC:
 		// we can ignore the kind of magic and only look at the name of the member
 		if (member == "coinbase")

libsolidity/ExpressionCompiler.h

@@ -31,9 +31,10 @@ class AssemblyItem; // forward
 }
 namespace solidity {
 
-class CompilerContext; // forward
+// forward declarations
-class Type; // forward
+class CompilerContext;
-class IntegerType; // forward
+class Type;
+class IntegerType;
 
 /**
  * Compiler for expressions, i.e. converts an AST tree whose root is an Expression into a stream

libsolidity/GlobalContext.cpp

@@ -74,11 +74,10 @@ vector<Declaration*> GlobalContext::getDeclarations() const
 	declarations.reserve(m_magicVariables.size() + 1);
 	for (ASTPointer<Declaration> const& variable: m_magicVariables)
 		declarations.push_back(variable.get());
-	declarations.push_back(getCurrentThis());
 	return declarations;
 }
 
-MagicVariableDeclaration*GlobalContext::getCurrentThis() const
+MagicVariableDeclaration* GlobalContext::getCurrentThis() const
 {
 	if (!m_thisPointer[m_currentContract])
 		m_thisPointer[m_currentContract] = make_shared<MagicVariableDeclaration>(

libsolidity/GlobalContext.h

@@ -47,12 +47,14 @@ class GlobalContext: private boost::noncopyable
 public:
 	GlobalContext();
 	void setCurrentContract(ContractDefinition const& _contract);
+	MagicVariableDeclaration* getCurrentThis() const;
 
+	/// @returns all magic variables.
 	std::vector<MagicVariableDeclaration const*> getMagicVariables() const;
+	/// @returns a vector of all implicit global declarations excluding "this".
 	std::vector<Declaration*> getDeclarations() const;
 
 private:
-	MagicVariableDeclaration* getCurrentThis() const;
 	std::vector<std::shared_ptr<MagicVariableDeclaration>> m_magicVariables;
 	ContractDefinition const* m_currentContract;
 	std::map<ContractDefinition const*, std::shared_ptr<MagicVariableDeclaration>> mutable m_thisPointer;

libsolidity/InterfaceHandler.cpp

@@ -15,7 +15,7 @@ InterfaceHandler::InterfaceHandler()
 	m_lastTag = DocTagType::NONE;
 }
 
-std::unique_ptr<std::string> InterfaceHandler::getDocumentation(std::shared_ptr<ContractDefinition> _contractDef,
+std::unique_ptr<std::string> InterfaceHandler::getDocumentation(ContractDefinition& _contractDef,
 																DocumentationType _type)
 {
 	switch(_type)
@@ -32,11 +32,11 @@ std::unique_ptr<std::string> InterfaceHandler::getDocumentation(std::shared_ptr<
 	return nullptr;
 }
 
-std::unique_ptr<std::string> InterfaceHandler::getABIInterface(std::shared_ptr<ContractDefinition> _contractDef)
+std::unique_ptr<std::string> InterfaceHandler::getABIInterface(ContractDefinition& _contractDef)
 {
 	Json::Value methods(Json::arrayValue);
 
-	for (FunctionDefinition const* f: _contractDef->getInterfaceFunctions())
+	for (FunctionDefinition const* f: _contractDef.getInterfaceFunctions())
 	{
 		Json::Value method;
 		Json::Value inputs(Json::arrayValue);
@@ -63,12 +63,12 @@ std::unique_ptr<std::string> InterfaceHandler::getABIInterface(std::shared_ptr<C
 	return std::unique_ptr<std::string>(new std::string(m_writer.write(methods)));
 }
 
-std::unique_ptr<std::string> InterfaceHandler::getUserDocumentation(std::shared_ptr<ContractDefinition> _contractDef)
+std::unique_ptr<std::string> InterfaceHandler::getUserDocumentation(ContractDefinition& _contractDef)
 {
 	Json::Value doc;
 	Json::Value methods(Json::objectValue);
 
-	for (FunctionDefinition const* f: _contractDef->getInterfaceFunctions())
+	for (FunctionDefinition const* f: _contractDef.getInterfaceFunctions())
 	{
 		Json::Value user;
 		auto strPtr = f->getDocumentation();
@@ -88,14 +88,14 @@ std::unique_ptr<std::string> InterfaceHandler::getUserDocumentation(std::shared_
 	return std::unique_ptr<std::string>(new std::string(m_writer.write(doc)));
 }
 
-std::unique_ptr<std::string> InterfaceHandler::getDevDocumentation(std::shared_ptr<ContractDefinition> _contractDef)
+std::unique_ptr<std::string> InterfaceHandler::getDevDocumentation(ContractDefinition& _contractDef)
 {
 	// LTODO: Somewhere in this function warnings for mismatch of param names
 	// should be thrown
 	Json::Value doc;
 	Json::Value methods(Json::objectValue);
 
-	for (FunctionDefinition const* f: _contractDef->getInterfaceFunctions())
+	for (FunctionDefinition const* f: _contractDef.getInterfaceFunctions())
 	{
 		Json::Value method;
 		auto strPtr = f->getDocumentation();

libsolidity/InterfaceHandler.h

@@ -59,23 +59,23 @@ public:
 	///                     types provided by @c DocumentationType
 	/// @return             A unique pointer contained string with the json
 	///                     representation of provided type
-	std::unique_ptr<std::string> getDocumentation(std::shared_ptr<ContractDefinition> _contractDef,
+	std::unique_ptr<std::string> getDocumentation(ContractDefinition& _contractDef,
 												  DocumentationType _type);
 	/// Get the ABI Interface of the contract
 	/// @param _contractDef The contract definition
 	/// @return             A unique pointer contained string with the json
 	///                     representation of the contract's ABI Interface
-	std::unique_ptr<std::string> getABIInterface(std::shared_ptr<ContractDefinition> _contractDef);
+	std::unique_ptr<std::string> getABIInterface(ContractDefinition& _contractDef);
 	/// Get the User documentation of the contract
 	/// @param _contractDef The contract definition
 	/// @return             A unique pointer contained string with the json
 	///                     representation of the contract's user documentation
-	std::unique_ptr<std::string> getUserDocumentation(std::shared_ptr<ContractDefinition> _contractDef);
+	std::unique_ptr<std::string> getUserDocumentation(ContractDefinition& _contractDef);
 	/// Get the Developer's documentation of the contract
 	/// @param _contractDef The contract definition
 	/// @return             A unique pointer contained string with the json
 	///                     representation of the contract's developer documentation
-	std::unique_ptr<std::string> getDevDocumentation(std::shared_ptr<ContractDefinition> _contractDef);
+	std::unique_ptr<std::string> getDevDocumentation(ContractDefinition& _contractDef);
 
 private:
 	void resetUser();

libsolidity/NameAndTypeResolver.cpp

@@ -38,9 +38,14 @@ NameAndTypeResolver::NameAndTypeResolver(std::vector<Declaration*> const& _globa
 		m_scopes[nullptr].registerDeclaration(*declaration);
 }
 
+void NameAndTypeResolver::registerDeclarations(SourceUnit& _sourceUnit)
+{
+	// The helper registers all declarations in m_scopes as a side-effect of its construction.
+	DeclarationRegistrationHelper registrar(m_scopes, _sourceUnit);
+}
+
 void NameAndTypeResolver::resolveNamesAndTypes(ContractDefinition& _contract)
 {
-	DeclarationRegistrationHelper registrar(m_scopes, _contract);
 	m_currentScope = &m_scopes[&_contract];
 	for (ASTPointer<StructDefinition> const& structDef: _contract.getDefinedStructs())
 		ReferencesResolver resolver(*structDef, *this, nullptr);
@@ -65,6 +70,12 @@ void NameAndTypeResolver::resolveNamesAndTypes(ContractDefinition& _contract)
 	m_currentScope = &m_scopes[nullptr];
 }
 
+void NameAndTypeResolver::updateDeclaration(Declaration& _declaration)
+{
+	m_scopes[nullptr].registerDeclaration(_declaration, true);
+	_declaration.setScope(nullptr);
+}
+
 Declaration* NameAndTypeResolver::resolveName(ASTString const& _name, Declaration const* _scope) const
 {
 	auto iterator = m_scopes.find(_scope);

libsolidity/NameAndTypeResolver.h

@@ -42,7 +42,13 @@ class NameAndTypeResolver: private boost::noncopyable
 {
 public:
 	explicit NameAndTypeResolver(std::vector<Declaration*> const& _globals);
+	/// Registers all declarations found in the source unit.
+	void registerDeclarations(SourceUnit& _sourceUnit);
+	/// Resolves all names and types referenced from the given contract.
 	void resolveNamesAndTypes(ContractDefinition& _contract);
+	/// Updates the given global declaration (used for "this"). Not to be used with declarations
+	/// that create their own scope.
+	void updateDeclaration(Declaration& _declaration);
 
 	/// Resolves the given @a _name inside the scope @a _scope. If @a _scope is omitted,
 	/// the global scope is used (i.e. the one containing only the contract).

libsolidity/Parser.cpp

@@ -20,30 +20,27 @@
  * Solidity parser.
  */
 
+#include <vector>
 #include <libdevcore/Log.h>
 #include <libsolidity/BaseTypes.h>
 #include <libsolidity/Parser.h>
 #include <libsolidity/Scanner.h>
 #include <libsolidity/Exceptions.h>
 
+using namespace std;
+
 namespace dev
 {
 namespace solidity
 {
 
-ASTPointer<ContractDefinition> Parser::parse(std::shared_ptr<Scanner> const& _scanner)
-{
-	m_scanner = _scanner;
-	return parseContractDefinition();
-}
-
-
 /// AST node factory that also tracks the begin and end position of an AST node
 /// while it is being parsed
 class Parser::ASTNodeFactory
 {
 public:
-	ASTNodeFactory(Parser const& _parser): m_parser(_parser), m_location(_parser.getPosition(), -1) {}
+	ASTNodeFactory(Parser const& _parser):
+		m_parser(_parser), m_location(_parser.getPosition(), -1, _parser.getSourceName()) {}
 
 	void markEndPosition() { m_location.end = m_parser.getEndPosition(); }
 	void setLocationEmpty() { m_location.end = m_location.start; }
@@ -55,7 +52,7 @@ public:
 	{
 		if (m_location.end < 0)
 			markEndPosition();
-		return std::make_shared<NodeType>(m_location, std::forward<Args>(_args)...);
+		return make_shared<NodeType>(m_location, forward<Args>(_args)...);
 	}
 
 private:
@@ -63,6 +60,33 @@ private:
 	Location m_location;
 };
 
+ASTPointer<SourceUnit> Parser::parse(shared_ptr<Scanner> const& _scanner)
+{
+	m_scanner = _scanner;
+	ASTNodeFactory nodeFactory(*this);
+	vector<ASTPointer<ASTNode>> nodes;
+	while (_scanner->getCurrentToken() != Token::EOS)
+	{
+		switch (m_scanner->getCurrentToken())
+		{
+		case Token::IMPORT:
+			nodes.push_back(parseImportDirective());
+			break;
+		case Token::CONTRACT:
+			nodes.push_back(parseContractDefinition());
+			break;
+		default:
+			BOOST_THROW_EXCEPTION(createParserError(std::string("Expected import directive or contract definition.")));
+		}
+	}
+	return nodeFactory.createNode<SourceUnit>(nodes);
+}
+
+std::shared_ptr<const string> const& Parser::getSourceName() const
+{
+	return m_scanner->getSourceName();
+}
+
 int Parser::getPosition() const
 {
 	return m_scanner->getCurrentLocation().start;
@@ -73,15 +97,27 @@ int Parser::getEndPosition() const
 	return m_scanner->getCurrentLocation().end;
 }
 
+ASTPointer<ImportDirective> Parser::parseImportDirective()
+{
+	ASTNodeFactory nodeFactory(*this);
+	expectToken(Token::IMPORT);
+	if (m_scanner->getCurrentToken() != Token::STRING_LITERAL)
+		BOOST_THROW_EXCEPTION(createParserError("Expected string literal (URL)."));
+	ASTPointer<ASTString> url = getLiteralAndAdvance();
+	nodeFactory.markEndPosition();
+	expectToken(Token::SEMICOLON);
+	return nodeFactory.createNode<ImportDirective>(url);
+}
+
 ASTPointer<ContractDefinition> Parser::parseContractDefinition()
 {
 	ASTNodeFactory nodeFactory(*this);
 	expectToken(Token::CONTRACT);
 	ASTPointer<ASTString> name = expectIdentifierToken();
 	expectToken(Token::LBRACE);
-	std::vector<ASTPointer<StructDefinition>> structs;
+	vector<ASTPointer<StructDefinition>> structs;
-	std::vector<ASTPointer<VariableDeclaration>> stateVariables;
+	vector<ASTPointer<VariableDeclaration>> stateVariables;
-	std::vector<ASTPointer<FunctionDefinition>> functions;
+	vector<ASTPointer<FunctionDefinition>> functions;
 	bool visibilityIsPublic = true;
 	while (true)
 	{
@@ -110,7 +146,6 @@ ASTPointer<ContractDefinition> Parser::parseContractDefinition()
 	}
 	nodeFactory.markEndPosition();
 	expectToken(Token::RBRACE);
-	expectToken(Token::EOS);
 	return nodeFactory.createNode<ContractDefinition>(name, structs, stateVariables, functions);
 }
 
@@ -119,7 +154,7 @@ ASTPointer<FunctionDefinition> Parser::parseFunctionDefinition(bool _isPublic)
 	ASTNodeFactory nodeFactory(*this);
 	ASTPointer<ASTString> docstring;
 	if (m_scanner->getCurrentCommentLiteral() != "")
-		docstring = std::make_shared<ASTString>(m_scanner->getCurrentCommentLiteral());
+		docstring = make_shared<ASTString>(m_scanner->getCurrentCommentLiteral());
 
 	expectToken(Token::FUNCTION);
 	ASTPointer<ASTString> name(expectIdentifierToken());
@@ -142,7 +177,7 @@ ASTPointer<FunctionDefinition> Parser::parseFunctionDefinition(bool _isPublic)
 		// create an empty parameter list at a zero-length location
 		ASTNodeFactory nodeFactory(*this);
 		nodeFactory.setLocationEmpty();
-		returnParameters = nodeFactory.createNode<ParameterList>(std::vector<ASTPointer<VariableDeclaration>>());
+		returnParameters = nodeFactory.createNode<ParameterList>(vector<ASTPointer<VariableDeclaration>>());
 	}
 	ASTPointer<Block> block = parseBlock();
 	nodeFactory.setEndPositionFromNode(block);
@@ -156,7 +191,7 @@ ASTPointer<StructDefinition> Parser::parseStructDefinition()
 	ASTNodeFactory nodeFactory(*this);
 	expectToken(Token::STRUCT);
 	ASTPointer<ASTString> name = expectIdentifierToken();
-	std::vector<ASTPointer<VariableDeclaration>> members;
+	vector<ASTPointer<VariableDeclaration>> members;
 	expectToken(Token::LBRACE);
 	while (m_scanner->getCurrentToken() != Token::RBRACE)
 	{
@@ -228,7 +263,7 @@ ASTPointer<Mapping> Parser::parseMapping()
 ASTPointer<ParameterList> Parser::parseParameterList(bool _allowEmpty)
 {
 	ASTNodeFactory nodeFactory(*this);
-	std::vector<ASTPointer<VariableDeclaration>> parameters;
+	vector<ASTPointer<VariableDeclaration>> parameters;
 	expectToken(Token::LPAREN);
 	if (!_allowEmpty || m_scanner->getCurrentToken() != Token::RPAREN)
 	{
@@ -249,7 +284,7 @@ ASTPointer<Block> Parser::parseBlock()
 {
 	ASTNodeFactory nodeFactory(*this);
 	expectToken(Token::LBRACE);
-	std::vector<ASTPointer<Statement>> statements;
+	vector<ASTPointer<Statement>> statements;
 	while (m_scanner->getCurrentToken() != Token::RBRACE)
 		statements.push_back(parseStatement());
 	nodeFactory.markEndPosition();
@@ -447,7 +482,7 @@ ASTPointer<Expression> Parser::parseLeftHandSideExpression()
 		case Token::LPAREN:
 		{
 			m_scanner->next();
-			std::vector<ASTPointer<Expression>> arguments = parseFunctionCallArguments();
+			vector<ASTPointer<Expression>> arguments = parseFunctionCallArguments();
 			nodeFactory.markEndPosition();
 			expectToken(Token::RPAREN);
 			expression = nodeFactory.createNode<FunctionCall>(expression, arguments);
@@ -503,9 +538,9 @@ ASTPointer<Expression> Parser::parsePrimaryExpression()
 	return expression;
 }
 
-std::vector<ASTPointer<Expression>> Parser::parseFunctionCallArguments()
+vector<ASTPointer<Expression>> Parser::parseFunctionCallArguments()
 {
-	std::vector<ASTPointer<Expression>> arguments;
+	vector<ASTPointer<Expression>> arguments;
 	if (m_scanner->getCurrentToken() != Token::RPAREN)
 	{
 		arguments.push_back(parseExpression());
@@ -521,7 +556,7 @@ std::vector<ASTPointer<Expression>> Parser::parseFunctionCallArguments()
 void Parser::expectToken(Token::Value _value)
 {
 	if (m_scanner->getCurrentToken() != _value)
-		BOOST_THROW_EXCEPTION(createParserError(std::string("Expected token ") + std::string(Token::getName(_value))));
+		BOOST_THROW_EXCEPTION(createParserError(string("Expected token ") + string(Token::getName(_value))));
 	m_scanner->next();
 }
 
@@ -543,14 +578,15 @@ ASTPointer<ASTString> Parser::expectIdentifierToken()
 
 ASTPointer<ASTString> Parser::getLiteralAndAdvance()
 {
-	ASTPointer<ASTString> identifier = std::make_shared<ASTString>(m_scanner->getCurrentLiteral());
+	ASTPointer<ASTString> identifier = make_shared<ASTString>(m_scanner->getCurrentLiteral());
 	m_scanner->next();
 	return identifier;
 }
 
-ParserError Parser::createParserError(std::string const& _description) const
+ParserError Parser::createParserError(string const& _description) const
 {
-	return ParserError() << errinfo_sourcePosition(getPosition()) << errinfo_comment(_description);
+	return ParserError() << errinfo_sourceLocation(Location(getPosition(), getPosition(), getSourceName()))
+						 << errinfo_comment(_description);
 }
 
 

libsolidity/Parser.h

@@ -34,7 +34,8 @@ class Scanner;
 class Parser
 {
 public:
-	ASTPointer<ContractDefinition> parse(std::shared_ptr<Scanner> const& _scanner);
+	ASTPointer<SourceUnit> parse(std::shared_ptr<Scanner> const& _scanner);
+	std::shared_ptr<std::string const> const& getSourceName() const;
 
 private:
 	class ASTNodeFactory;
@@ -46,6 +47,7 @@ private:
 
 	///@{
 	///@name Parsing functions for the AST nodes
+	ASTPointer<ImportDirective> parseImportDirective();
 	ASTPointer<ContractDefinition> parseContractDefinition();
 	ASTPointer<FunctionDefinition> parseFunctionDefinition(bool _isPublic);
 	ASTPointer<StructDefinition> parseStructDefinition();

libsolidity/Scanner.cpp

@@ -143,17 +143,22 @@ private:
 }; // end of LiteralScope class
 
 
-void Scanner::reset(CharStream const& _source)
+void Scanner::reset(CharStream const& _source, string const& _sourceName)
 {
 	m_source = _source;
+	m_sourceName = make_shared<string const>(_sourceName);
+	reset();
+}
+
+void Scanner::reset()
+{
+	m_source.reset();
 	m_char = m_source.get();
 	skipWhitespace();
 	scanToken();
-
 	next();
 }
 
-
 bool Scanner::scanHexByte(char& o_scannedByte)
 {
 	char x = 0;

libsolidity/Scanner.h

@@ -79,6 +79,8 @@ public:
 	char advanceAndGet(size_t _chars=1);
 	char rollback(size_t _amount);
 
+	void reset() { m_pos = 0; }
+
 	///@{
 	///@name Error printing helper functions
 	/// Functions that help pretty-printing parse errors
@@ -99,11 +101,12 @@ class Scanner
 	friend class LiteralScope;
 public:
 
-	Scanner() { reset(CharStream()); }
+	explicit Scanner(CharStream const& _source = CharStream(), std::string const& _sourceName = "") { reset(_source, _sourceName); }
-	explicit Scanner(CharStream const& _source) { reset(_source); }
 
-	/// Resets the scanner as if newly constructed with _input as input.
+	/// Resets the scanner as if newly constructed with _source and _sourceName as input.
-	void reset(CharStream const& _source);
+	void reset(CharStream const& _source, std::string const& _sourceName);
+	/// Resets scanner to the start of input.
+	void reset();
 
 	/// Returns the next token and advances input
 	Token::Value next();
@@ -139,6 +142,8 @@ public:
 	std::string const& peekLiteral() const { return m_nextToken.literal; }
 	///@}
 
+	std::shared_ptr<std::string const> const& getSourceName() const { return m_sourceName; }
+
 	///@{
 	///@name Error printing helper functions
 	/// Functions that help pretty-printing parse errors
@@ -203,6 +208,7 @@ private:
 	TokenDesc m_nextToken;     // desc for next token (one token look-ahead)
 
 	CharStream m_source;
+	std::shared_ptr<std::string const> m_sourceName;
 
 	/// one character look-ahead, equals 0 at end of input
 	char m_char;

libsolidity/SourceReferenceFormatter.cpp

@@ -21,6 +21,7 @@
  */
 
 #include <libsolidity/SourceReferenceFormatter.h>
+#include <libsolidity/CompilerStack.h>
 #include <libsolidity/Scanner.h>
 #include <libsolidity/Exceptions.h>
 
@@ -38,7 +39,6 @@ void SourceReferenceFormatter::printSourceLocation(ostream& _stream,
 	int startLine;
 	int startColumn;
 	tie(startLine, startColumn) = _scanner.translatePositionToLineColumn(_location.start);
-	_stream << "starting at line " << (startLine + 1) << ", column " << (startColumn + 1) << "\n";
 	int endLine;
 	int endColumn;
 	tie(endLine, endColumn) = _scanner.translatePositionToLineColumn(_location.end);
@@ -58,37 +58,28 @@ void SourceReferenceFormatter::printSourceLocation(ostream& _stream,
 				<< "Spanning multiple lines.\n";
 }
 
-void SourceReferenceFormatter::printSourcePosition(ostream& _stream,
-												   int _position,
-												   const Scanner& _scanner)
-{
-	int line;
-	int column;
-	tie(line, column) = _scanner.translatePositionToLineColumn(_position);
-	_stream << "at line " << (line + 1) << ", column " << (column + 1) << endl
-			<< _scanner.getLineAtPosition(_position) << endl
-			<< string(column, ' ') << "^" << endl;
-}
-
 void SourceReferenceFormatter::printExceptionInformation(ostream& _stream,
 														 Exception const& _exception,
 														 string const& _name,
-														 Scanner const& _scanner)
+														 CompilerStack& _compiler)
 {
-	_stream << _name;
+	Location const* location = boost::get_error_info<errinfo_sourceLocation>(_exception);
-	if (string const* description = boost::get_error_info<errinfo_comment>(_exception))
+	Scanner const* scanner;
-		_stream << ": " << *description;
 
-	if (int const* position = boost::get_error_info<errinfo_sourcePosition>(_exception))
+	if (location)
 	{
-		_stream << " ";
+		scanner = &_compiler.getScanner(*location->sourceName);
-		printSourcePosition(_stream, *position, _scanner);
+		int startLine;
-	}
+		int startColumn;
-	if (Location const* location = boost::get_error_info<errinfo_sourceLocation>(_exception))
+		tie(startLine, startColumn) = scanner->translatePositionToLineColumn(location->start);
-	{
+		_stream << *location->sourceName << ":" << (startLine + 1) << ":" << (startColumn + 1) << ": ";
-		_stream << " ";
-		printSourceLocation(_stream, *location, _scanner);
 	}
+	_stream << _name;
+	if (string const* description = boost::get_error_info<errinfo_comment>(_exception))
+		_stream << ": " << *description << endl;
+
+	if (location)
+		printSourceLocation(_stream, *location, *scanner);
 }
 
 }

libsolidity/SourceReferenceFormatter.h

@@ -34,14 +34,14 @@ namespace solidity
 {
 
 class Scanner; // forward
+class CompilerStack; // forward
 
 struct SourceReferenceFormatter
 {
 public:
 	static void printSourceLocation(std::ostream& _stream, Location const& _location, Scanner const& _scanner);
-	static void printSourcePosition(std::ostream& _stream, int _position, Scanner const& _scanner);
 	static void printExceptionInformation(std::ostream& _stream, Exception const& _exception,
-										  std::string const& _name, Scanner const& _scanner);
+										  std::string const& _name, CompilerStack& _compiler);
 };
 
 }

libsolidity/Types.cpp

@@ -140,7 +140,7 @@ bool IntegerType::isImplicitlyConvertibleTo(Type const& _convertTo) const
 
 bool IntegerType::isExplicitlyConvertibleTo(Type const& _convertTo) const
 {
-	return _convertTo.getCategory() == getCategory();
+	return _convertTo.getCategory() == getCategory() || _convertTo.getCategory() == Category::CONTRACT;
 }
 
 bool IntegerType::acceptsBinaryOperator(Token::Value _operator) const
@@ -247,6 +247,31 @@ string ContractType::toString() const
 	return "contract " + m_contract.getName();
 }
 
+MemberList const& ContractType::getMembers() const
+{
+	// We need to lazy-initialize it because of recursive references.
+	if (!m_members)
+	{
+		map<string, shared_ptr<Type const>> members;
+		for (FunctionDefinition const* function: m_contract.getInterfaceFunctions())
+			members[function->getName()] = make_shared<FunctionType>(*function, false);
+		m_members.reset(new MemberList(members));
+	}
+	return *m_members;
+}
+
+unsigned ContractType::getFunctionIndex(string const& _functionName) const
+{
+	unsigned index = 0;
+	for (FunctionDefinition const* function: m_contract.getInterfaceFunctions())
+	{
+		if (function->getName() == _functionName)
+			return index;
+		++index;
+	}
+	BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Index of non-existing contract function requested."));
+}
+
 bool StructType::operator==(Type const& _other) const
 {
 	if (_other.getCategory() != getCategory())
@@ -302,7 +327,7 @@ u256 StructType::getStorageOffsetOfMember(string const& _name) const
 	BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Storage offset of non-existing member requested."));
 }
 
-FunctionType::FunctionType(FunctionDefinition const& _function)
+FunctionType::FunctionType(FunctionDefinition const& _function, bool _isInternal)
 {
 	TypePointers params;
 	TypePointers retParams;
@@ -314,7 +339,7 @@ FunctionType::FunctionType(FunctionDefinition const& _function)
 		retParams.push_back(var->getType());
 	swap(params, m_parameterTypes);
 	swap(retParams, m_returnParameterTypes);
-	m_location = Location::INTERNAL;
+	m_location = _isInternal ? Location::INTERNAL : Location::EXTERNAL;
 }
 
 bool FunctionType::operator==(Type const& _other) const
@@ -323,6 +348,8 @@ bool FunctionType::operator==(Type const& _other) const
 		return false;
 	FunctionType const& other = dynamic_cast<FunctionType const&>(_other);
 
+	if (m_location != other.m_location)
+		return false;
 	if (m_parameterTypes.size() != other.m_parameterTypes.size() ||
 			m_returnParameterTypes.size() != other.m_returnParameterTypes.size())
 		return false;

libsolidity/Types.h

@@ -214,10 +214,17 @@ public:
 	virtual bool isExplicitlyConvertibleTo(Type const& _convertTo) const override;
 	virtual bool operator==(Type const& _other) const override;
 	virtual u256 getStorageSize() const override;
+	virtual bool isValueType() const override { return true; }
 	virtual std::string toString() const override;
 
+	virtual MemberList const& getMembers() const override;
+
+	unsigned getFunctionIndex(std::string const& _functionName) const;
+
 private:
 	ContractDefinition const& m_contract;
+	/// List of member types, will be lazy-initialized because of recursive references.
+	mutable std::unique_ptr<MemberList> m_members;
 };
 
 /**
@@ -263,7 +270,7 @@ public:
 	enum class Location { INTERNAL, EXTERNAL, SEND, SHA3, SUICIDE, ECRECOVER, SHA256, RIPEMD160 };
 
 	virtual Category getCategory() const override { return Category::FUNCTION; }
-	explicit FunctionType(FunctionDefinition const& _function);
+	explicit FunctionType(FunctionDefinition const& _function, bool _isInternal = true);
 	FunctionType(TypePointers const& _parameterTypes, TypePointers const& _returnParameterTypes,
 				 Location _location = Location::INTERNAL):
 		m_parameterTypes(_parameterTypes), m_returnParameterTypes(_returnParameterTypes),

libweb3jsonrpc/WebThreeStubServer.cpp

@@ -510,7 +510,7 @@ std::string WebThreeStubServer::eth_solidity(std::string const& _code)
 	catch (dev::Exception const& exception)
 	{
 		ostringstream error;
-		solidity::SourceReferenceFormatter::printExceptionInformation(error, exception, "Error", compiler.getScanner());
+		solidity::SourceReferenceFormatter::printExceptionInformation(error, exception, "Error", compiler);
 		cwarn << "Solidity compilation error: " << error.str();
 	}
 	catch (...)

libwhisper/Message.cpp

@@ -91,7 +91,6 @@ Envelope Message::seal(Secret _from, Topic const& _topic, unsigned _ttl, unsigne
 
 Envelope::Envelope(RLP const& _m)
 {
-	cdebug << _m;
 	m_expiry = _m[0].toInt<unsigned>();
 	m_ttl = _m[1].toInt<unsigned>();
 	m_topic = _m[2].toVector<FixedHash<4>>();

libwhisper/WhisperHost.cpp

@@ -68,7 +68,7 @@ void WhisperHost::inject(Envelope const& _m, WhisperPeer* _p)
 			return;
 		UpgradeGuard ll(l);
 		m_messages[h] = _m;
-		m_expiryQueue[_m.expiry()] = h;
+		m_expiryQueue.insert(make_pair(_m.expiry(), h));
 	}
 
 //	if (_p)

libwhisper/WhisperHost.h

@@ -78,7 +78,7 @@ private:
 
 	mutable dev::SharedMutex x_messages;
 	std::map<h256, Envelope> m_messages;
-	std::map<unsigned, h256> m_expiryQueue;
+	std::multimap<unsigned, h256> m_expiryQueue;
 
 	mutable dev::Mutex m_filterLock;
 	std::map<h256, InstalledFilter> m_filters;

libwhisper/WhisperPeer.cpp

@@ -106,5 +106,5 @@ void WhisperPeer::sendMessages()
 void WhisperPeer::noteNewMessage(h256 _h, Message const& _m)
 {
 	Guard l(x_unseen);
-	m_unseen[rating(_m)] = _h;
+	m_unseen.insert(make_pair(rating(_m), _h));
 }

libwhisper/WhisperPeer.h

@@ -67,7 +67,7 @@ private:
 	void noteNewMessage(h256 _h, Message const& _m);
 
 	mutable dev::Mutex x_unseen;
-	std::map<unsigned, h256> m_unseen;	///< Rated according to what they want.
+	std::multimap<unsigned, h256> m_unseen;	///< Rated according to what they want.
 
 	std::chrono::system_clock::time_point m_timer = std::chrono::system_clock::now();
 };

mix/ConstantCompilationModel.cpp

@@ -46,7 +46,7 @@ CompilerResult ConstantCompilationModel::compile(QString _code)
 	catch (dev::Exception const& _exception)
 	{
 		ostringstream error;
-		solidity::SourceReferenceFormatter::printExceptionInformation(error, _exception, "Error", compiler.getScanner());
+		solidity::SourceReferenceFormatter::printExceptionInformation(error, _exception, "Error", compiler);
 		res.success = false;
 		res.comment = QString::fromStdString(error.str()).toHtmlEscaped();
 		res.hexCode = "";

solc/main.cpp

@@ -59,7 +59,7 @@ void version()
 
 int main(int argc, char** argv)
 {
-	string infile;
+	vector<string> infiles;
 	bool optimize = false;
 	for (int i = 1; i < argc; ++i)
 	{
@@ -71,49 +71,52 @@ int main(int argc, char** argv)
 		else if (arg == "-V" || arg == "--version")
 			version();
 		else
-			infile = argv[i];
+			infiles.push_back(argv[i]);
 	}
-	string sourceCode;
+	map<string, string> sourceCodes;
-	if (infile.empty())
+	if (infiles.empty())
 	{
 		string s;
 		while (!cin.eof())
 		{
 			getline(cin, s);
-			sourceCode.append(s);
+			sourceCodes["<stdin>"].append(s);
 		}
 	}
 	else
-		sourceCode = asString(dev::contents(infile));
+		for (string const& infile: infiles)
+			sourceCodes[infile] = asString(dev::contents(infile));
 
 	CompilerStack compiler;
 	try
 	{
-		compiler.compile(sourceCode, optimize);
+		for (auto const& sourceCode: sourceCodes)
+			compiler.addSource(sourceCode.first, sourceCode.second);
+		compiler.compile(optimize);
 	}
 	catch (ParserError const& exception)
 	{
-		SourceReferenceFormatter::printExceptionInformation(cerr, exception, "Parser error", compiler.getScanner());
+		SourceReferenceFormatter::printExceptionInformation(cerr, exception, "Parser error", compiler);
 		return -1;
 	}
 	catch (DeclarationError const& exception)
 	{
-		SourceReferenceFormatter::printExceptionInformation(cerr, exception, "Declaration error", compiler.getScanner());
+		SourceReferenceFormatter::printExceptionInformation(cerr, exception, "Declaration error", compiler);
 		return -1;
 	}
 	catch (TypeError const& exception)
 	{
-		SourceReferenceFormatter::printExceptionInformation(cerr, exception, "Type error", compiler.getScanner());
+		SourceReferenceFormatter::printExceptionInformation(cerr, exception, "Type error", compiler);
 		return -1;
 	}
 	catch (CompilerError const& exception)
 	{
-		SourceReferenceFormatter::printExceptionInformation(cerr, exception, "Compiler error", compiler.getScanner());
+		SourceReferenceFormatter::printExceptionInformation(cerr, exception, "Compiler error", compiler);
 		return -1;
 	}
 	catch (InternalCompilerError const& exception)
 	{
-		SourceReferenceFormatter::printExceptionInformation(cerr, exception, "Internal compiler error", compiler.getScanner());
+		SourceReferenceFormatter::printExceptionInformation(cerr, exception, "Internal compiler error", compiler);
 		return -1;
 	}
 	catch (Exception const& exception)
@@ -127,17 +130,27 @@ int main(int argc, char** argv)
 		return -1;
 	}
 
-	cout << "Syntax tree for the contract:" << endl;
+	cout << "Syntax trees:" << endl << endl;
-	ASTPrinter printer(compiler.getAST(), sourceCode);
+	for (auto const& sourceCode: sourceCodes)
-	printer.print(cout);
+	{
-	cout << "EVM assembly:" << endl;
+		cout << endl << "======= " << sourceCode.first << " =======" << endl;
-	compiler.streamAssembly(cout);
+		ASTPrinter printer(compiler.getAST(sourceCode.first), sourceCode.second);
-	cout << "Opcodes:" << endl;
+		printer.print(cout);
-	cout << eth::disassemble(compiler.getBytecode()) << endl;
+	}
-	cout << "Binary: " << toHex(compiler.getBytecode()) << endl;
+	vector<string> contracts = compiler.getContractNames();
-	cout << "Interface specification: " << compiler.getJsonDocumentation(DocumentationType::ABI_INTERFACE) << endl;
+	cout << endl << "Contracts:" << endl;
-	cout << "Natspec user documentation: " << compiler.getJsonDocumentation(DocumentationType::NATSPEC_USER) << endl;
+	for (string const& contract: contracts)
-	cout << "Natspec developer documentation: " << compiler.getJsonDocumentation(DocumentationType::NATSPEC_DEV) << endl;
+	{
+		cout << endl << "======= " << contract << " =======" << endl
+			 << "EVM assembly:" << endl;
+		compiler.streamAssembly(cout, contract);
+		cout << "Opcodes:" << endl
+			 << eth::disassemble(compiler.getBytecode(contract)) << endl
+			 << "Binary: " << toHex(compiler.getBytecode(contract)) << endl
+			 << "Interface specification: " << compiler.getJsonDocumentation(contract, DocumentationType::ABI_INTERFACE) << endl
+			 << "Natspec user documentation: " << compiler.getJsonDocumentation(contract, DocumentationType::NATSPEC_USER) << endl
+			 << "Natspec developer documentation: " << compiler.getJsonDocumentation(contract, DocumentationType::NATSPEC_DEV) << endl;
+	}
 
 	return 0;
 }

test/solidityCompiler.cpp

@@ -46,16 +46,23 @@ namespace
 bytes compileContract(const string& _sourceCode)
 {
 	Parser parser;
-	ASTPointer<ContractDefinition> contract;
+	ASTPointer<SourceUnit> sourceUnit;
-	BOOST_REQUIRE_NO_THROW(contract = parser.parse(make_shared<Scanner>(CharStream(_sourceCode))));
+	BOOST_REQUIRE_NO_THROW(sourceUnit = parser.parse(make_shared<Scanner>(CharStream(_sourceCode))));
 	NameAndTypeResolver resolver({});
-	BOOST_REQUIRE_NO_THROW(resolver.resolveNamesAndTypes(*contract));
+	resolver.registerDeclarations(*sourceUnit);
-
+	for (ASTPointer<ASTNode> const& node: sourceUnit->getNodes())
-	Compiler compiler;
+		if (ContractDefinition* contract = dynamic_cast<ContractDefinition*>(node.get()))
-	compiler.compileContract(*contract, {});
+		{
-	// debug
+			BOOST_REQUIRE_NO_THROW(resolver.resolveNamesAndTypes(*contract));
-	//compiler.streamAssembly(cout);
+
-	return compiler.getAssembledBytecode();
+			Compiler compiler;
+			compiler.compileContract(*contract, {});
+			// debug
+			//compiler.streamAssembly(cout);
+			return compiler.getAssembledBytecode();
+		}
+	BOOST_FAIL("No contract found in source.");
+	return bytes();
 }
 
 /// Checks that @a _compiledCode is present starting from offset @a _offset in @a _expectation.

test/solidityEndToEndTest.cpp

@@ -47,9 +47,11 @@ class ExecutionFramework
 public:
 	ExecutionFramework() { g_logVerbosity = 0; }
 
-	bytes const& compileAndRun(string const& _sourceCode, u256 const& _value = 0)
+	bytes const& compileAndRun(string const& _sourceCode, u256 const& _value = 0, string const& _contractName = "")
 	{
-		bytes code = dev::solidity::CompilerStack::staticCompile(_sourceCode);
+		dev::solidity::CompilerStack compiler;
+		compiler.compile(_sourceCode);
+		bytes code = compiler.getBytecode(_contractName);
 		sendMessage(code, true, _value);
 		BOOST_REQUIRE(!m_output.empty());
 		return m_output;
@@ -115,6 +117,7 @@ private:
 
 	void sendMessage(bytes const& _data, bool _isCreation, u256 const& _value = 0)
 	{
+		m_state.addBalance(m_sender, _value); // just in case
 		eth::Executive executive(m_state);
 		eth::Transaction t = _isCreation ? eth::Transaction(_value, m_gasPrice, m_gas, _data, 0, KeyPair::create().sec())
 										 : eth::Transaction(_value, m_gasPrice, m_gas, m_contractAddress, _data, 0, KeyPair::create().sec());
@@ -127,7 +130,7 @@ private:
 		catch (...) {}
 		if (_isCreation)
 		{
-			BOOST_REQUIRE(!executive.create(Address(), _value, m_gasPrice, m_gas, &_data, Address()));
+			BOOST_REQUIRE(!executive.create(m_sender, _value, m_gasPrice, m_gas, &_data, m_sender));
 			m_contractAddress = executive.newAddress();
 			BOOST_REQUIRE(m_contractAddress);
 			BOOST_REQUIRE(m_state.addressHasCode(m_contractAddress));
@@ -135,14 +138,16 @@ private:
 		else
 		{
 			BOOST_REQUIRE(m_state.addressHasCode(m_contractAddress));
-			BOOST_REQUIRE(!executive.call(m_contractAddress, Address(), _value, m_gasPrice, &_data, m_gas, Address()));
+			BOOST_REQUIRE(!executive.call(m_contractAddress, m_sender, _value, m_gasPrice, &_data, m_gas, m_sender));
 		}
 		BOOST_REQUIRE(executive.go());
+		m_state.noteSending(m_sender);
 		executive.finalize();
 		m_output = executive.out().toVector();
 	}
 
 protected:
+	Address m_sender;
 	Address m_contractAddress;
 	eth::State m_state;
 	u256 const m_gasPrice = 100 * eth::szabo;
@@ -898,6 +903,128 @@ BOOST_AUTO_TEST_CASE(ecrecover)
 	BOOST_CHECK(callContractFunction(0, h, v, r, s) == toBigEndian(addr));
 }
 
+BOOST_AUTO_TEST_CASE(inter_contract_calls)
+{
+	char const* sourceCode = R"(
+		contract Helper {
+			function multiply(uint a, uint b) returns (uint c) {
+				return a * b;
+			}
+		}
+		contract Main {
+			Helper h;
+			function callHelper(uint a, uint b) returns (uint c) {
+				return h.multiply(a, b);
+			}
+			function getHelper() returns (address haddress) {
+				return address(h);
+			}
+			function setHelper(address haddress) {
+				h = Helper(haddress);
+			}
+		})";
+	compileAndRun(sourceCode, 0, "Helper");
+	u160 const helperAddress = m_contractAddress;
+	compileAndRun(sourceCode, 0, "Main");
+	BOOST_REQUIRE(callContractFunction(2, helperAddress) == bytes());
+	BOOST_REQUIRE(callContractFunction(1, helperAddress) == toBigEndian(helperAddress));
+	u256 a(3456789);
+	u256 b("0x282837623374623234aa74");
+	BOOST_REQUIRE(callContractFunction(0, a, b) == toBigEndian(a * b));
+}
+
+BOOST_AUTO_TEST_CASE(inter_contract_calls_with_complex_parameters)
+{
+	char const* sourceCode = R"(
+		contract Helper {
+			function sel(uint a, bool select, uint b) returns (uint c) {
+				if (select) return a; else return b;
+			}
+		}
+		contract Main {
+			Helper h;
+			function callHelper(uint a, bool select, uint b) returns (uint c) {
+				return h.sel(a, select, b) * 3;
+			}
+			function getHelper() returns (address haddress) {
+				return address(h);
+			}
+			function setHelper(address haddress) {
+				h = Helper(haddress);
+			}
+		})";
+	compileAndRun(sourceCode, 0, "Helper");
+	u160 const helperAddress = m_contractAddress;
+	compileAndRun(sourceCode, 0, "Main");
+	BOOST_REQUIRE(callContractFunction(2, helperAddress) == bytes());
+	BOOST_REQUIRE(callContractFunction(1, helperAddress) == toBigEndian(helperAddress));
+	u256 a(3456789);
+	u256 b("0x282837623374623234aa74");
+	BOOST_REQUIRE(callContractFunction(0, a, true, b) == toBigEndian(a * 3));
+	BOOST_REQUIRE(callContractFunction(0, a, false, b) == toBigEndian(b * 3));
+}
+
+BOOST_AUTO_TEST_CASE(inter_contract_calls_accessing_this)
+{
+	char const* sourceCode = R"(
+		contract Helper {
+			function getAddress() returns (address addr) {
+				return address(this);
+			}
+		}
+		contract Main {
+			Helper h;
+			function callHelper() returns (address addr) {
+				return h.getAddress();
+			}
+			function getHelper() returns (address addr) {
+				return address(h);
+			}
+			function setHelper(address addr) {
+				h = Helper(addr);
+			}
+		})";
+	compileAndRun(sourceCode, 0, "Helper");
+	u160 const helperAddress = m_contractAddress;
+	compileAndRun(sourceCode, 0, "Main");
+	BOOST_REQUIRE(callContractFunction(2, helperAddress) == bytes());
+	BOOST_REQUIRE(callContractFunction(1, helperAddress) == toBigEndian(helperAddress));
+	BOOST_REQUIRE(callContractFunction(0) == toBigEndian(helperAddress));
+}
+
+BOOST_AUTO_TEST_CASE(calls_to_this)
+{
+	char const* sourceCode = R"(
+		contract Helper {
+			function invoke(uint a, uint b) returns (uint c) {
+				return this.multiply(a, b, 10);
+			}
+			function multiply(uint a, uint b, uint8 c) returns (uint ret) {
+				return a * b + c;
+			}
+		}
+		contract Main {
+			Helper h;
+			function callHelper(uint a, uint b) returns (uint ret) {
+				return h.invoke(a, b);
+			}
+			function getHelper() returns (address addr) {
+				return address(h);
+			}
+			function setHelper(address addr) {
+				h = Helper(addr);
+			}
+		})";
+	compileAndRun(sourceCode, 0, "Helper");
+	u160 const helperAddress = m_contractAddress;
+	compileAndRun(sourceCode, 0, "Main");
+	BOOST_REQUIRE(callContractFunction(2, helperAddress) == bytes());
+	BOOST_REQUIRE(callContractFunction(1, helperAddress) == toBigEndian(helperAddress));
+	u256 a(3456789);
+	u256 b("0x282837623374623234aa74");
+	BOOST_REQUIRE(callContractFunction(0, a, b) == toBigEndian(a * b + 10));
+}
+
 BOOST_AUTO_TEST_SUITE_END()
 
 }

test/solidityExpressionCompiler.cpp

@@ -86,27 +86,34 @@ bytes compileFirstExpression(const string& _sourceCode, vector<vector<string>> _
 							 vector<vector<string>> _localVariables = {})
 {
 	Parser parser;
-	ASTPointer<ContractDefinition> contract;
+	ASTPointer<SourceUnit> sourceUnit;
-	BOOST_REQUIRE_NO_THROW(contract = parser.parse(make_shared<Scanner>(CharStream(_sourceCode))));
+	BOOST_REQUIRE_NO_THROW(sourceUnit = parser.parse(make_shared<Scanner>(CharStream(_sourceCode))));
 	NameAndTypeResolver resolver({});
-	BOOST_REQUIRE_NO_THROW(resolver.resolveNamesAndTypes(*contract));
+	resolver.registerDeclarations(*sourceUnit);
-	FirstExpressionExtractor extractor(*contract);
+	for (ASTPointer<ASTNode> const& node: sourceUnit->getNodes())
-	BOOST_REQUIRE(extractor.getExpression() != nullptr);
+		if (ContractDefinition* contract = dynamic_cast<ContractDefinition*>(node.get()))
-
+		{
-	CompilerContext context;
+			BOOST_REQUIRE_NO_THROW(resolver.resolveNamesAndTypes(*contract));
-	for (vector<string> const& function: _functions)
+			FirstExpressionExtractor extractor(*contract);
-		context.addFunction(dynamic_cast<FunctionDefinition const&>(resolveDeclaration(function, resolver)));
+			BOOST_REQUIRE(extractor.getExpression() != nullptr);
-	for (vector<string> const& variable: _localVariables)
+
-		context.addVariable(dynamic_cast<VariableDeclaration const&>(resolveDeclaration(variable, resolver)));
+			CompilerContext context;
-
+			for (vector<string> const& function: _functions)
-	ExpressionCompiler::compileExpression(context, *extractor.getExpression());
+				context.addFunction(dynamic_cast<FunctionDefinition const&>(resolveDeclaration(function, resolver)));
-
+			for (vector<string> const& variable: _localVariables)
-	for (vector<string> const& function: _functions)
+				context.addVariable(dynamic_cast<VariableDeclaration const&>(resolveDeclaration(variable, resolver)));
-		context << context.getFunctionEntryLabel(dynamic_cast<FunctionDefinition const&>(resolveDeclaration(function, resolver)));
+
-	bytes instructions = context.getAssembledBytecode();
+			ExpressionCompiler::compileExpression(context, *extractor.getExpression());
-	// debug
+
-	// cout << eth::disassemble(instructions) << endl;
+			for (vector<string> const& function: _functions)
-	return instructions;
+				context << context.getFunctionEntryLabel(dynamic_cast<FunctionDefinition const&>(resolveDeclaration(function, resolver)));
+			bytes instructions = context.getAssembledBytecode();
+			// debug
+			// cout << eth::disassemble(instructions) << endl;
+			return instructions;
+		}
+	BOOST_FAIL("No contract found in source.");
+	return bytes();
 }
 
 } // end anonymous namespace

test/solidityJSONInterfaceTest.cpp

@@ -50,7 +50,7 @@ public:
 				msg += *extra;
 			BOOST_FAIL(msg);
 		}
-		std::string generatedInterfaceString = m_compilerStack.getJsonDocumentation(DocumentationType::ABI_INTERFACE);
+		std::string generatedInterfaceString = m_compilerStack.getJsonDocumentation("", DocumentationType::ABI_INTERFACE);
 		Json::Value generatedInterface;
 		m_reader.parse(generatedInterfaceString, generatedInterface);
 		Json::Value expectedInterface;

test/solidityNameAndTypeResolution.cpp

@@ -41,10 +41,12 @@ namespace
 void parseTextAndResolveNames(std::string const& _source)
 {
 	Parser parser;
-	ASTPointer<ContractDefinition> contract = parser.parse(
+	ASTPointer<SourceUnit> sourceUnit = parser.parse(std::make_shared<Scanner>(CharStream(_source)));
-										   std::make_shared<Scanner>(CharStream(_source)));
 	NameAndTypeResolver resolver({});
-	resolver.resolveNamesAndTypes(*contract);
+	resolver.registerDeclarations(*sourceUnit);
+	for (ASTPointer<ASTNode> const& node: sourceUnit->getNodes())
+		if (ContractDefinition* contract = dynamic_cast<ContractDefinition*>(node.get()))
+			resolver.resolveNamesAndTypes(*contract);
 }
 }
 

test/solidityNatspecJSON.cpp

@@ -55,9 +55,9 @@ public:
 		}
 
 		if (_userDocumentation)
-			generatedDocumentationString = m_compilerStack.getJsonDocumentation(DocumentationType::NATSPEC_USER);
+			generatedDocumentationString = m_compilerStack.getJsonDocumentation("", DocumentationType::NATSPEC_USER);
 		else
-			generatedDocumentationString = m_compilerStack.getJsonDocumentation(DocumentationType::NATSPEC_DEV);
+			generatedDocumentationString = m_compilerStack.getJsonDocumentation("", DocumentationType::NATSPEC_DEV);
 		Json::Value generatedDocumentation;
 		m_reader.parse(generatedDocumentationString, generatedDocumentation);
 		Json::Value expectedDocumentation;

test/solidityParser.cpp

@@ -21,13 +21,15 @@
  */
 
 #include <string>
-
+#include <memory>
 #include <libdevcore/Log.h>
 #include <libsolidity/Scanner.h>
 #include <libsolidity/Parser.h>
 #include <libsolidity/Exceptions.h>
 #include <boost/test/unit_test.hpp>
 
+using namespace std;
+
 namespace dev
 {
 namespace solidity
@@ -40,7 +42,12 @@ namespace
 ASTPointer<ContractDefinition> parseText(std::string const& _source)
 {
 	Parser parser;
-	return parser.parse(std::make_shared<Scanner>(CharStream(_source)));
+	ASTPointer<SourceUnit> sourceUnit = parser.parse(std::make_shared<Scanner>(CharStream(_source)));
+	for (ASTPointer<ASTNode> const& node: sourceUnit->getNodes())
+		if (ASTPointer<ContractDefinition> contract = dynamic_pointer_cast<ContractDefinition>(node))
+			return contract;
+	BOOST_FAIL("No contract found in source.");
+	return ASTPointer<ContractDefinition>();
 }
 }
 
@@ -380,6 +387,50 @@ BOOST_AUTO_TEST_CASE(statement_starting_with_type_conversion)
 	BOOST_CHECK_NO_THROW(parseText(text));
 }
 
+BOOST_AUTO_TEST_CASE(import_directive)
+{
+	char const* text = "import \"abc\";\n"
+					   "contract test {\n"
+					   "  function fun() {\n"
+					   "    uint64(2);\n"
+					   "  }\n"
+					   "}\n";
+	BOOST_CHECK_NO_THROW(parseText(text));
+}
+
+BOOST_AUTO_TEST_CASE(multiple_contracts)
+{
+	char const* text = "contract test {\n"
+					   "  function fun() {\n"
+					   "    uint64(2);\n"
+					   "  }\n"
+					   "}\n"
+					   "contract test2 {\n"
+					   "  function fun() {\n"
+					   "    uint64(2);\n"
+					   "  }\n"
+					   "}\n";
+	BOOST_CHECK_NO_THROW(parseText(text));
+}
+
+BOOST_AUTO_TEST_CASE(multiple_contracts_and_imports)
+{
+	char const* text = "import \"abc\";\n"
+					   "contract test {\n"
+					   "  function fun() {\n"
+					   "    uint64(2);\n"
+					   "  }\n"
+					   "}\n"
+					   "import \"def\";\n"
+					   "contract test2 {\n"
+					   "  function fun() {\n"
+					   "    uint64(2);\n"
+					   "  }\n"
+					   "}\n"
+					   "import \"ghi\";\n";
+	BOOST_CHECK_NO_THROW(parseText(text));
+}
+
 BOOST_AUTO_TEST_SUITE_END()
 
 }