Create contracts.

libsolidity/AST.cpp

@@ -54,6 +54,14 @@ vector<FunctionDefinition const*> ContractDefinition::getInterfaceFunctions() co
 	return exportedFunctions;
 }
 
+FunctionDefinition const* ContractDefinition::getConstructor() const
+{
+	for (ASTPointer<FunctionDefinition> const& f: m_definedFunctions)
+		if (f->getName() == getName())
+			return f.get();
+	return nullptr;
+}
+
 void StructDefinition::checkMemberTypes() const
 {
 	for (ASTPointer<VariableDeclaration> const& member: getMembers())
@@ -235,13 +243,12 @@ void FunctionCall::checkTypeRequirements()
 			BOOST_THROW_EXCEPTION(createTypeError("Explicit type conversion not allowed."));
 		m_type = type.getActualType();
 	}
-	else
+	else if (FunctionType const* functionType = dynamic_cast<FunctionType const*>(expressionType))
 	{
 		//@todo would be nice to create a struct type from the arguments
 		// and then ask if that is implicitly convertible to the struct represented by the
 		// function parameters
-		FunctionType const& functionType = dynamic_cast<FunctionType const&>(*expressionType);
-		TypePointers const& parameterTypes = functionType.getParameterTypes();
+		TypePointers const& parameterTypes = functionType->getParameterTypes();
 		if (parameterTypes.size() != m_arguments.size())
 			BOOST_THROW_EXCEPTION(createTypeError("Wrong argument count for function call."));
 		for (size_t i = 0; i < m_arguments.size(); ++i)
@@ -249,11 +256,13 @@ void FunctionCall::checkTypeRequirements()
 				BOOST_THROW_EXCEPTION(createTypeError("Invalid type for argument in function call."));
 		// @todo actually the return type should be an anonymous struct,
 		// but we change it to the type of the first return value until we have structs
-		if (functionType.getReturnParameterTypes().empty())
+		if (functionType->getReturnParameterTypes().empty())
 			m_type = make_shared<VoidType>();
 		else
-			m_type = functionType.getReturnParameterTypes().front();
+			m_type = functionType->getReturnParameterTypes().front();
 	}
+	else
+		BOOST_THROW_EXCEPTION(createTypeError("Type is not callable."));
 }
 
 bool FunctionCall::isTypeConversion() const
@@ -261,6 +270,25 @@ bool FunctionCall::isTypeConversion() const
 	return m_expression->getType()->getCategory() == Type::Category::TYPE;
 }
 
+void NewExpression::checkTypeRequirements()
+{
+	m_contractName->checkTypeRequirements();
+	for (ASTPointer<Expression> const& argument: m_arguments)
+		argument->checkTypeRequirements();
+
+	m_contract = dynamic_cast<ContractDefinition const*>(m_contractName->getReferencedDeclaration());
+	if (!m_contract)
+		BOOST_THROW_EXCEPTION(createTypeError("Identifier is not a contract."));
+	shared_ptr<ContractType const> type = make_shared<ContractType const>(*m_contract);
+	m_type = type;
+	TypePointers const& parameterTypes = type->getConstructorType()->getParameterTypes();
+	if (parameterTypes.size() != m_arguments.size())
+		BOOST_THROW_EXCEPTION(createTypeError("Wrong argument count for constructor call."));
+	for (size_t i = 0; i < m_arguments.size(); ++i)
+		if (!m_arguments[i]->getType()->isImplicitlyConvertibleTo(*parameterTypes[i]))
+			BOOST_THROW_EXCEPTION(createTypeError("Invalid type for argument in constructor call."));
+}
+
 void MemberAccess::checkTypeRequirements()
 {
 	m_expression->checkTypeRequirements();

libsolidity/AST.h

@@ -181,6 +181,9 @@ public:
 	/// Returns the functions that make up the calling interface in the intended order.
 	std::vector<FunctionDefinition const*> getInterfaceFunctions() const;
 
+	/// Returns the constructor or nullptr if no constructor was specified
+	FunctionDefinition const* getConstructor() const;
+
 private:
 	std::vector<ASTPointer<StructDefinition>> m_definedStructs;
 	std::vector<ASTPointer<VariableDeclaration>> m_stateVariables;
@@ -740,6 +743,31 @@ private:
 	std::vector<ASTPointer<Expression>> m_arguments;
 };
 
+/**
+ * Expression that creates a new contract, e.g. "new SomeContract(1, 2)".
+ */
+class NewExpression: public Expression
+{
+public:
+	NewExpression(Location const& _location, ASTPointer<Identifier> const& _contractName,
+				  std::vector<ASTPointer<Expression>> const& _arguments):
+		Expression(_location), m_contractName(_contractName), m_arguments(_arguments) {}
+	virtual void accept(ASTVisitor& _visitor) override;
+	virtual void accept(ASTConstVisitor& _visitor) const override;
+	virtual void checkTypeRequirements() override;
+
+	std::vector<ASTPointer<Expression const>> getArguments() const { return {m_arguments.begin(), m_arguments.end()}; }
+
+	/// Returns the referenced contract. Can only be called after type checking.
+	ContractDefinition const* getContract() const { return m_contract; }
+
+private:
+	ASTPointer<Identifier> m_contractName;
+	std::vector<ASTPointer<Expression>> m_arguments;
+
+	ContractDefinition const* m_contract = nullptr;
+};
+
 /**
  * Access to a member of an object. Example: x.name
  */

libsolidity/ASTForward.h

@@ -62,6 +62,7 @@ class Assignment;
 class UnaryOperation;
 class BinaryOperation;
 class FunctionCall;
+class NewExpression;
 class MemberAccess;
 class IndexAccess;
 class PrimaryExpression;

libsolidity/ASTPrinter.cpp

@@ -226,6 +226,14 @@ bool ASTPrinter::visit(FunctionCall const& _node)
 	return goDeeper();
 }
 
+bool ASTPrinter::visit(NewExpression const& _node)
+{
+	writeLine("NewExpression");
+	printType(_node);
+	printSourcePart(_node);
+	return goDeeper();
+}
+
 bool ASTPrinter::visit(MemberAccess const& _node)
 {
 	writeLine("MemberAccess to member " + _node.getMemberName());
@@ -402,6 +410,11 @@ void ASTPrinter::endVisit(FunctionCall const&)
 	m_indentation--;
 }
 
+void ASTPrinter::endVisit(NewExpression const&)
+{
+	m_indentation--;
+}
+
 void ASTPrinter::endVisit(MemberAccess const&)
 {
 	m_indentation--;

libsolidity/ASTPrinter.h

@@ -67,6 +67,7 @@ public:
 	bool visit(UnaryOperation const& _node) override;
 	bool visit(BinaryOperation const& _node) override;
 	bool visit(FunctionCall const& _node) override;
+	bool visit(NewExpression const& _node) override;
 	bool visit(MemberAccess const& _node) override;
 	bool visit(IndexAccess const& _node) override;
 	bool visit(PrimaryExpression const& _node) override;
@@ -99,6 +100,7 @@ public:
 	void endVisit(UnaryOperation const&) override;
 	void endVisit(BinaryOperation const&) override;
 	void endVisit(FunctionCall const&) override;
+	void endVisit(NewExpression const&) override;
 	void endVisit(MemberAccess const&) override;
 	void endVisit(IndexAccess const&) override;
 	void endVisit(PrimaryExpression const&) override;

libsolidity/ASTVisitor.h

@@ -68,6 +68,7 @@ public:
 	virtual bool visit(UnaryOperation&) { return true; }
 	virtual bool visit(BinaryOperation&) { return true; }
 	virtual bool visit(FunctionCall&) { return true; }
+	virtual bool visit(NewExpression&) { return true; }
 	virtual bool visit(MemberAccess&) { return true; }
 	virtual bool visit(IndexAccess&) { return true; }
 	virtual bool visit(PrimaryExpression&) { return true; }
@@ -102,6 +103,7 @@ public:
 	virtual void endVisit(UnaryOperation&) { }
 	virtual void endVisit(BinaryOperation&) { }
 	virtual void endVisit(FunctionCall&) { }
+	virtual void endVisit(NewExpression&) { }
 	virtual void endVisit(MemberAccess&) { }
 	virtual void endVisit(IndexAccess&) { }
 	virtual void endVisit(PrimaryExpression&) { }
@@ -140,6 +142,7 @@ public:
 	virtual bool visit(UnaryOperation const&) { return true; }
 	virtual bool visit(BinaryOperation const&) { return true; }
 	virtual bool visit(FunctionCall const&) { return true; }
+	virtual bool visit(NewExpression const&) { return true; }
 	virtual bool visit(MemberAccess const&) { return true; }
 	virtual bool visit(IndexAccess const&) { return true; }
 	virtual bool visit(PrimaryExpression const&) { return true; }
@@ -174,6 +177,7 @@ public:
 	virtual void endVisit(UnaryOperation const&) { }
 	virtual void endVisit(BinaryOperation const&) { }
 	virtual void endVisit(FunctionCall const&) { }
+	virtual void endVisit(NewExpression const&) { }
 	virtual void endVisit(MemberAccess const&) { }
 	virtual void endVisit(IndexAccess const&) { }
 	virtual void endVisit(PrimaryExpression const&) { }

libsolidity/AST_accept.h

@@ -419,6 +419,26 @@ void FunctionCall::accept(ASTConstVisitor& _visitor) const
 	_visitor.endVisit(*this);
 }
 
+void NewExpression::accept(ASTVisitor& _visitor)
+{
+	if (_visitor.visit(*this))
+	{
+		m_contractName->accept(_visitor);
+		listAccept(m_arguments, _visitor);
+	}
+	_visitor.endVisit(*this);
+}
+
+void NewExpression::accept(ASTConstVisitor& _visitor) const
+{
+	if (_visitor.visit(*this))
+	{
+		m_contractName->accept(_visitor);
+		listAccept(m_arguments, _visitor);
+	}
+	_visitor.endVisit(*this);
+}
+
 void MemberAccess::accept(ASTVisitor& _visitor)
 {
 	if (_visitor.visit(*this))

libsolidity/Compiler.cpp

@@ -33,9 +33,11 @@ using namespace std;
 namespace dev {
 namespace solidity {
 
-void Compiler::compileContract(ContractDefinition const& _contract, vector<MagicVariableDeclaration const*> const& _magicGlobals)
+void Compiler::compileContract(ContractDefinition const& _contract, vector<MagicVariableDeclaration const*> const& _magicGlobals,
+							   map<ContractDefinition const*, bytes const*> const& _contracts)
 {
 	m_context = CompilerContext(); // clear it just in case
+	m_context.setCompiledContracts(_contracts);
 
 	for (MagicVariableDeclaration const* variable: _magicGlobals)
 		m_context.addMagicGlobal(*variable);
@@ -50,12 +52,14 @@ void Compiler::compileContract(ContractDefinition const& _contract, vector<Magic
 		if (function->getName() != _contract.getName()) // don't add the constructor here
 			function->accept(*this);
 
-	packIntoContractCreator(_contract);
+	packIntoContractCreator(_contract, _contracts);
 }
 
-void Compiler::packIntoContractCreator(ContractDefinition const& _contract)
+void Compiler::packIntoContractCreator(ContractDefinition const& _contract,
+									   map<ContractDefinition const*, bytes const*> const& _contracts)
 {
 	CompilerContext runtimeContext;
+	runtimeContext.setCompiledContracts(_contracts);
 	swap(m_context, runtimeContext);
 
 	registerStateVariables(_contract);
@@ -67,11 +71,14 @@ void Compiler::packIntoContractCreator(ContractDefinition const& _contract)
 			constructor = function.get();
 			break;
 		}
+	eth::AssemblyItem sub = m_context.addSubroutine(runtimeContext.getAssembly());
+	// stack contains sub size
 	if (constructor)
 	{
 		eth::AssemblyItem returnTag = m_context.pushNewTag();
 		m_context.addFunction(*constructor); // note that it cannot be called due to syntactic reasons
-		//@todo copy constructor arguments from calldata to memory prior to this
+		// copy constructor arguments
+		//@todo ask assembly for the size of the current program
 		//@todo calling other functions inside the constructor should either trigger a parse error
 		//or we should copy them here (register them above and call "accept") - detecting which
 		// functions are referenced / called needs to be done in a recursive way.
@@ -81,8 +88,6 @@ void Compiler::packIntoContractCreator(ContractDefinition const& _contract)
 		m_context << returnTag;
 	}
 
-	eth::AssemblyItem sub = m_context.addSubroutine(runtimeContext.getAssembly());
-	// stack contains sub size
 	m_context << eth::Instruction::DUP1 << sub << u256(0) << eth::Instruction::CODECOPY;
 	m_context << u256(0) << eth::Instruction::RETURN;
 }

libsolidity/Compiler.h

@@ -32,14 +32,16 @@ class Compiler: private ASTConstVisitor
 public:
 	explicit Compiler(bool _optimize = false): m_optimize(_optimize), m_returnTag(m_context.newTag()) {}
 
-	void compileContract(ContractDefinition const& _contract, std::vector<MagicVariableDeclaration const*> const& _magicGlobals);
+	void compileContract(ContractDefinition const& _contract, std::vector<MagicVariableDeclaration const*> const& _magicGlobals,
+						 std::map<ContractDefinition const*, bytes const*> const& _contracts);
 	bytes getAssembledBytecode() { return m_context.getAssembledBytecode(m_optimize); }
 	void streamAssembly(std::ostream& _stream) const { m_context.streamAssembly(_stream); }
 
 private:
 	/// Creates a new compiler context / assembly, packs the current code into the data part and
 	/// adds the constructor code.
-	void packIntoContractCreator(ContractDefinition const& _contract);
+	void packIntoContractCreator(ContractDefinition const& _contract,
+								 std::map<ContractDefinition const*, bytes const*> const& _contracts);
 	void appendFunctionSelector(ContractDefinition const& _contract);
 	/// Creates code that unpacks the arguments for the given function, from memory if
 	/// @a _fromMemory is true, otherwise from call data. @returns the size of the data in bytes.

libsolidity/CompilerContext.cpp

@@ -62,6 +62,14 @@ void CompilerContext::addFunction(FunctionDefinition const& _function)
 	m_functionEntryLabels.insert(std::make_pair(&_function, m_asm.newTag()));
 }
 
+bytes const& CompilerContext::getCompiledContract(const ContractDefinition& _contract) const
+{
+	auto ret = m_compiledContracts.find(&_contract);
+	if (asserts(ret != m_compiledContracts.end()))
+		BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Compiled contract not found."));
+	return *ret->second;
+}
+
 bool CompilerContext::isLocalVariable(Declaration const* _declaration) const
 {
 	return m_localVariables.count(_declaration) > 0;

libsolidity/CompilerContext.h

@@ -39,8 +39,6 @@ namespace solidity {
 class CompilerContext
 {
 public:
-	CompilerContext(): m_stateVariablesSize(0) {}
-
 	void addMagicGlobal(MagicVariableDeclaration const& _declaration);
 	void addStateVariable(VariableDeclaration const& _declaration);
 	void startNewFunction() { m_localVariables.clear(); m_asm.setDeposit(0); }
@@ -48,6 +46,9 @@ public:
 	void addAndInitializeVariable(VariableDeclaration const& _declaration);
 	void addFunction(FunctionDefinition const& _function);
 
+	void setCompiledContracts(std::map<ContractDefinition const*, bytes const*> const& _contracts) { m_compiledContracts = _contracts; }
+	bytes const& getCompiledContract(ContractDefinition const& _contract) const;
+
 	void adjustStackOffset(int _adjustment) { m_asm.adjustDeposit(_adjustment); }
 
 	bool isMagicGlobal(Declaration const* _declaration) const { return m_magicGlobals.count(_declaration); }
@@ -80,6 +81,8 @@ public:
 	/// Adds a subroutine to the code (in the data section) and pushes its size (via a tag)
 	/// on the stack. @returns the assembly item corresponding to the pushed subroutine, i.e. its offset.
 	eth::AssemblyItem addSubroutine(eth::Assembly const& _assembly) { return m_asm.appendSubSize(_assembly); }
+	/// Adds data to the data section, pushes a reference to the stack
+	eth::AssemblyItem appendData(bytes const& _data) { return m_asm.append(_data); }
 
 	/// Append elements to the current instruction list and adjust @a m_stackOffset.
 	CompilerContext& operator<<(eth::AssemblyItem const& _item) { m_asm.append(_item); return *this; }
@@ -90,13 +93,16 @@ public:
 	eth::Assembly const& getAssembly() const { return m_asm; }
 	void streamAssembly(std::ostream& _stream) const { _stream << m_asm; }
 	bytes getAssembledBytecode(bool _optimize = false) { return m_asm.optimise(_optimize).assemble(); }
+
 private:
 	eth::Assembly m_asm;
 
 	/// Magic global variables like msg, tx or this, distinguished by type.
 	std::set<Declaration const*> m_magicGlobals;
+	/// Other already compiled contracts to be used in contract creation calls.
+	std::map<ContractDefinition const*, bytes const*> m_compiledContracts;
 	/// Size of the state variables, offset of next variable to be added.
-	u256 m_stateVariablesSize;
+	u256 m_stateVariablesSize = 0;
 	/// Storage offsets of state variables
 	std::map<Declaration const*, u256> m_stateVariables;
 	/// Offsets of local variables on the stack (relative to stack base).

libsolidity/CompilerStack.cpp

@@ -96,16 +96,20 @@ void CompilerStack::compile(bool _optimize)
 {
 	if (!m_parseSuccessful)
 		parse();
+
+	map<ContractDefinition const*, bytes const*> contractBytecode;
 	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>(_optimize);
-				compiler->compileContract(*contract, m_globalContext->getMagicVariables());
+				compiler->compileContract(*contract, m_globalContext->getMagicVariables(),
+										  contractBytecode);
 				Contract& compiledContract = m_contracts[contract->getName()];
 				compiledContract.bytecode = compiler->getAssembledBytecode();
 				compiledContract.compiler = move(compiler);
+				contractBytecode[compiledContract.contract] = &compiledContract.bytecode;
 			}
 }
 

libsolidity/CompilerStack.h

@@ -108,7 +108,7 @@ private:
 
 	struct Contract
 	{
-		ContractDefinition* contract;
+		ContractDefinition const* contract;
 		std::shared_ptr<Compiler> compiler;
 		bytes bytecode;
 		std::shared_ptr<InterfaceHandler> interfaceHandler;

libsolidity/ExpressionCompiler.cpp

@@ -279,6 +279,44 @@ bool ExpressionCompiler::visit(FunctionCall const& _functionCall)
 	return false;
 }
 
+bool ExpressionCompiler::visit(NewExpression const& _newExpression)
+{
+	ContractType const* type = dynamic_cast<ContractType const*>(_newExpression.getType().get());
+	if (asserts(type))
+		BOOST_THROW_EXCEPTION(InternalCompilerError());
+	TypePointers const& types = type->getConstructorType()->getParameterTypes();
+	vector<ASTPointer<Expression const>> arguments = _newExpression.getArguments();
+	if (asserts(arguments.size() == types.size()))
+		BOOST_THROW_EXCEPTION(InternalCompilerError());
+
+	// copy the contracts code into memory
+	bytes const& bytecode = m_context.getCompiledContract(*_newExpression.getContract());
+	m_context << u256(bytecode.size());
+	//@todo could be done by actually appending the Assembly, but then we probably need to compile
+	// multiple times. Will revisit once external fuctions are inlined.
+	m_context.appendData(bytecode);
+	//@todo copy to memory position 0, shift as soon as we use memory
+	m_context << u256(0) << eth::Instruction::CODECOPY;
+
+	unsigned dataOffset = bytecode.size();
+	for (unsigned i = 0; i < arguments.size(); ++i)
+	{
+		arguments[i]->accept(*this);
+		appendTypeConversion(*arguments[i]->getType(), *types[i]);
+		unsigned const numBytes = types[i]->getCalldataEncodedSize();
+		if (numBytes > 32)
+			BOOST_THROW_EXCEPTION(CompilerError()
+								  << errinfo_sourceLocation(arguments[i]->getLocation())
+								  << errinfo_comment("Type " + types[i]->toString() + " not yet supported."));
+		bool const leftAligned = types[i]->getCategory() == Type::Category::STRING;
+		CompilerUtils(m_context).storeInMemory(dataOffset, numBytes, leftAligned);
+		dataOffset += numBytes;
+	}
+	// size, offset, endowment
+	m_context << u256(dataOffset) << u256(0) << u256(0) << eth::Instruction::CREATE;
+	return false;
+}
+
 void ExpressionCompiler::endVisit(MemberAccess const& _memberAccess)
 {
 	ASTString const& member = _memberAccess.getMemberName();

libsolidity/ExpressionCompiler.h

@@ -60,6 +60,7 @@ private:
 	virtual void endVisit(UnaryOperation const& _unaryOperation) override;
 	virtual bool visit(BinaryOperation const& _binaryOperation) override;
 	virtual bool visit(FunctionCall const& _functionCall) override;
+	virtual bool visit(NewExpression const& _newExpression) override;
 	virtual void endVisit(MemberAccess const& _memberAccess) override;
 	virtual bool visit(IndexAccess const& _indexAccess) override;
 	virtual void endVisit(Identifier const& _identifier) override;

libsolidity/InterfaceHandler.cpp

@@ -15,7 +15,7 @@ InterfaceHandler::InterfaceHandler()
 	m_lastTag = DocTagType::NONE;
 }
 
-std::unique_ptr<std::string> InterfaceHandler::getDocumentation(ContractDefinition& _contractDef,
+std::unique_ptr<std::string> InterfaceHandler::getDocumentation(ContractDefinition const& _contractDef,
 																DocumentationType _type)
 {
 	switch(_type)
@@ -32,7 +32,7 @@ std::unique_ptr<std::string> InterfaceHandler::getDocumentation(ContractDefiniti
 	return nullptr;
 }
 
-std::unique_ptr<std::string> InterfaceHandler::getABIInterface(ContractDefinition& _contractDef)
+std::unique_ptr<std::string> InterfaceHandler::getABIInterface(ContractDefinition const& _contractDef)
 {
 	Json::Value methods(Json::arrayValue);
 
@@ -63,7 +63,7 @@ std::unique_ptr<std::string> InterfaceHandler::getABIInterface(ContractDefinitio
 	return std::unique_ptr<std::string>(new std::string(m_writer.write(methods)));
 }
 
-std::unique_ptr<std::string> InterfaceHandler::getUserDocumentation(ContractDefinition& _contractDef)
+std::unique_ptr<std::string> InterfaceHandler::getUserDocumentation(ContractDefinition const& _contractDef)
 {
 	Json::Value doc;
 	Json::Value methods(Json::objectValue);
@@ -88,7 +88,7 @@ std::unique_ptr<std::string> InterfaceHandler::getUserDocumentation(ContractDefi
 	return std::unique_ptr<std::string>(new std::string(m_writer.write(doc)));
 }
 
-std::unique_ptr<std::string> InterfaceHandler::getDevDocumentation(ContractDefinition& _contractDef)
+std::unique_ptr<std::string> InterfaceHandler::getDevDocumentation(ContractDefinition const& _contractDef)
 {
 	// LTODO: Somewhere in this function warnings for mismatch of param names
 	// should be thrown

libsolidity/InterfaceHandler.h

@@ -67,23 +67,23 @@ 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(ContractDefinition& _contractDef,
+	std::unique_ptr<std::string> getDocumentation(ContractDefinition const& _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(ContractDefinition& _contractDef);
+	std::unique_ptr<std::string> getABIInterface(ContractDefinition const& _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(ContractDefinition& _contractDef);
+	std::unique_ptr<std::string> getUserDocumentation(ContractDefinition const& _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(ContractDefinition& _contractDef);
+	std::unique_ptr<std::string> getDevDocumentation(ContractDefinition const& _contractDef);
 
 private:
 	void resetUser();

libsolidity/Parser.cpp

@@ -437,7 +437,17 @@ ASTPointer<Expression> Parser::parseUnaryExpression()
 {
 	ASTNodeFactory nodeFactory(*this);
 	Token::Value token = m_scanner->getCurrentToken();
-	if (Token::isUnaryOp(token) || Token::isCountOp(token))
+	if (token == Token::NEW)
+	{
+		expectToken(Token::NEW);
+		ASTPointer<Identifier> contractName = ASTNodeFactory(*this).createNode<Identifier>(expectIdentifierToken());
+		expectToken(Token::LPAREN);
+		vector<ASTPointer<Expression>> arguments(parseFunctionCallArguments());
+		expectToken(Token::RPAREN);
+		nodeFactory.markEndPosition();
+		return nodeFactory.createNode<NewExpression>(contractName, arguments);
+	}
+	else if (Token::isUnaryOp(token) || Token::isCountOp(token))
 	{
 		// prefix expression
 		m_scanner->next();

libsolidity/Types.cpp

@@ -310,6 +310,19 @@ MemberList const& ContractType::getMembers() const
 	return *m_members;
 }
 
+shared_ptr<FunctionType const> const& ContractType::getConstructorType() const
+{
+	if (!m_constructorType)
+	{
+		FunctionDefinition const* constr = m_contract.getConstructor();
+		if (constr)
+			m_constructorType = make_shared<FunctionType const>(*constr);
+		else
+			m_constructorType = make_shared<FunctionType const>(TypePointers(), TypePointers());
+	}
+	return m_constructorType;
+}
+
 unsigned ContractType::getFunctionIndex(string const& _functionName) const
 {
 	unsigned index = 0;

libsolidity/Types.h

@@ -39,6 +39,7 @@ namespace solidity
 // @todo realMxN, dynamic strings, text, arrays
 
 class Type; // forward
+class FunctionType; // forward
 using TypePointer = std::shared_ptr<Type const>;
 using TypePointers = std::vector<TypePointer>;
 
@@ -249,10 +250,16 @@ public:
 
 	virtual MemberList const& getMembers() const override;
 
+	/// Returns the function type of the constructor. Note that the location part of the function type
+	/// is not used, as this type cannot be the type of a variable or expression.
+	std::shared_ptr<FunctionType const> const& getConstructorType() const;
+
 	unsigned getFunctionIndex(std::string const& _functionName) const;
 
 private:
 	ContractDefinition const& m_contract;
+	/// Type of the constructor, @see getConstructorType. Lazily initialized.
+	mutable std::shared_ptr<FunctionType const> m_constructorType;
 	/// List of member types, will be lazy-initialized because of recursive references.
 	mutable std::unique_ptr<MemberList> m_members;
 };
@@ -339,8 +346,8 @@ public:
 	virtual std::string toString() const override;
 	virtual bool canLiveOutsideStorage() const override { return false; }
 
-	TypePointer getKeyType() const { return m_keyType; }
-	TypePointer getValueType() const { return m_valueType; }
+	TypePointer const& getKeyType() const { return m_keyType; }
+	TypePointer const& getValueType() const { return m_valueType; }
 
 private:
 	TypePointer m_keyType;

libsolidity/grammar.txt

@@ -25,11 +25,12 @@ Break = 'break' ';'
 Return = 'return' Expression? ';'
 VariableDefinition = VariableDeclaration ( = Expression )? ';'
 
-Expression = Assignment | UnaryOperation | BinaryOperation | FunctionCall | IndexAccess |
+Expression = Assignment | UnaryOperation | BinaryOperation | FunctionCall | NewExpression | IndexAccess |
 			 MemberAccess | PrimaryExpression
 // The expression syntax is actually much more complicated
 Assignment = Expression (AssignmentOp Expression)
 FunctionCall = Expression '(' ( Expression ( ',' Expression )* ) ')'
+NewExpression = 'new' Identifier '(' ( Expression ( ',' Expression )* ) ')'
 MemberAccess = Expression '.' Identifier
 IndexAccess = Expression '[' Expresison ']'
 PrimaryExpression = Identifier | NumberLiteral | StringLiteral | ElementaryTypeName | '(' Expression ')'

test/solidityCompiler.cpp

@@ -56,7 +56,7 @@ bytes compileContract(const string& _sourceCode)
 			BOOST_REQUIRE_NO_THROW(resolver.resolveNamesAndTypes(*contract));
 
 			Compiler compiler;
-			compiler.compileContract(*contract, {});
+			compiler.compileContract(*contract, {}, {});
 			// debug
 			//compiler.streamAssembly(cout);
 			return compiler.getAssembledBytecode();