Constructor arguments for base classes.

libsolidity/AST.cpp

@@ -43,6 +43,9 @@ TypeError ASTNode::createTypeError(string const& _description) const
 
 void ContractDefinition::checkTypeRequirements()
 {
+	for (ASTPointer<InheritanceSpecifier> const& base: getBaseContracts())
+		base->checkTypeRequirements();
+
 	checkIllegalOverrides();
 
 	FunctionDefinition const* constructor = getConstructor();
@@ -123,6 +126,22 @@ vector<pair<FixedHash<4>, FunctionDefinition const*>> const& ContractDefinition:
 	return *m_interfaceFunctionList;
 }
 
+void InheritanceSpecifier::checkTypeRequirements()
+{
+	m_baseName->checkTypeRequirements();
+	for (ASTPointer<Expression> const& argument: m_arguments)
+		argument->checkTypeRequirements();
+
+	ContractDefinition const* base = dynamic_cast<ContractDefinition const*>(m_baseName->getReferencedDeclaration());
+	solAssert(base, "Base contract not available.");
+	TypePointers parameterTypes = ContractType(*base).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 constructer call."));
+}
+
 void StructDefinition::checkMemberTypes() const
 {
 	for (ASTPointer<VariableDeclaration> const& member: getMembers())

libsolidity/AST.h

@@ -158,7 +158,7 @@ public:
 	ContractDefinition(Location const& _location,
 					   ASTPointer<ASTString> const& _name,
 					   ASTPointer<ASTString> const& _documentation,
-					   std::vector<ASTPointer<Identifier>> const& _baseContracts,
+					   std::vector<ASTPointer<InheritanceSpecifier>> const& _baseContracts,
 					   std::vector<ASTPointer<StructDefinition>> const& _definedStructs,
 					   std::vector<ASTPointer<VariableDeclaration>> const& _stateVariables,
 					   std::vector<ASTPointer<FunctionDefinition>> const& _definedFunctions):
@@ -173,7 +173,7 @@ public:
 	virtual void accept(ASTVisitor& _visitor) override;
 	virtual void accept(ASTConstVisitor& _visitor) const override;
 
-	std::vector<ASTPointer<Identifier>> const& getBaseContracts() const { return m_baseContracts; }
+	std::vector<ASTPointer<InheritanceSpecifier>> const& getBaseContracts() const { return m_baseContracts; }
 	std::vector<ASTPointer<StructDefinition>> const& getDefinedStructs() const { return m_definedStructs; }
 	std::vector<ASTPointer<VariableDeclaration>> const& getStateVariables() const { return m_stateVariables; }
 	std::vector<ASTPointer<FunctionDefinition>> const& getDefinedFunctions() const { return m_definedFunctions; }
@@ -203,7 +203,7 @@ private:
 
 	std::vector<std::pair<FixedHash<4>, FunctionDefinition const*>> const& getInterfaceFunctionList() const;
 
-	std::vector<ASTPointer<Identifier>> m_baseContracts;
+	std::vector<ASTPointer<InheritanceSpecifier>> m_baseContracts;
 	std::vector<ASTPointer<StructDefinition>> m_definedStructs;
 	std::vector<ASTPointer<VariableDeclaration>> m_stateVariables;
 	std::vector<ASTPointer<FunctionDefinition>> m_definedFunctions;
@@ -213,6 +213,26 @@ private:
 	mutable std::unique_ptr<std::vector<std::pair<FixedHash<4>, FunctionDefinition const*>>> m_interfaceFunctionList;
 };
 
+class InheritanceSpecifier: public ASTNode
+{
+public:
+	InheritanceSpecifier(Location const& _location, ASTPointer<Identifier> const& _baseName,
+						 std::vector<ASTPointer<Expression>> _arguments):
+		ASTNode(_location), m_baseName(_baseName), m_arguments(_arguments) {}
+
+	virtual void accept(ASTVisitor& _visitor) override;
+	virtual void accept(ASTConstVisitor& _visitor) const override;
+
+	ASTPointer<Identifier> const& getName() const { return m_baseName; }
+	std::vector<ASTPointer<Expression>> const& getArguments() const { return m_arguments; }
+
+	void checkTypeRequirements();
+
+private:
+	ASTPointer<Identifier> m_baseName;
+	std::vector<ASTPointer<Expression>> m_arguments;
+};
+
 class StructDefinition: public Declaration
 {
 public:

libsolidity/ASTForward.h

@@ -38,6 +38,7 @@ class SourceUnit;
 class ImportDirective;
 class Declaration;
 class ContractDefinition;
+class InheritanceSpecifier;
 class StructDefinition;
 class ParameterList;
 class FunctionDefinition;

libsolidity/AST_accept.h

@@ -61,6 +61,7 @@ void ContractDefinition::accept(ASTVisitor& _visitor)
 {
 	if (_visitor.visit(*this))
 	{
+		listAccept(m_baseContracts, _visitor);
 		listAccept(m_definedStructs, _visitor);
 		listAccept(m_stateVariables, _visitor);
 		listAccept(m_definedFunctions, _visitor);
@@ -72,6 +73,7 @@ void ContractDefinition::accept(ASTConstVisitor& _visitor) const
 {
 	if (_visitor.visit(*this))
 	{
+		listAccept(m_baseContracts, _visitor);
 		listAccept(m_definedStructs, _visitor);
 		listAccept(m_stateVariables, _visitor);
 		listAccept(m_definedFunctions, _visitor);
@@ -79,6 +81,26 @@ void ContractDefinition::accept(ASTConstVisitor& _visitor) const
 	_visitor.endVisit(*this);
 }
 
+void InheritanceSpecifier::accept(ASTVisitor& _visitor)
+{
+	if (_visitor.visit(*this))
+	{
+		m_baseName->accept(_visitor);
+		listAccept(m_arguments, _visitor);
+	}
+	_visitor.endVisit(*this);
+}
+
+void InheritanceSpecifier::accept(ASTConstVisitor& _visitor) const
+{
+	if (_visitor.visit(*this))
+	{
+		m_baseName->accept(_visitor);
+		listAccept(m_arguments, _visitor);
+	}
+	_visitor.endVisit(*this);
+}
+
 void StructDefinition::accept(ASTVisitor& _visitor)
 {
 	if (_visitor.visit(*this))

libsolidity/NameAndTypeResolver.cpp

@@ -48,7 +48,7 @@ void NameAndTypeResolver::resolveNamesAndTypes(ContractDefinition& _contract)
 {
 	m_currentScope = &m_scopes[nullptr];
 
-	for (ASTPointer<Identifier> const& baseContract: _contract.getBaseContracts())
+	for (ASTPointer<InheritanceSpecifier> const& baseContract: _contract.getBaseContracts())
 		ReferencesResolver resolver(*baseContract, *this, &_contract, nullptr);
 
 	m_currentScope = &m_scopes[&_contract];
@@ -113,18 +113,19 @@ void NameAndTypeResolver::linearizeBaseContracts(ContractDefinition& _contract)
 	// order in the lists is from derived to base
 	// list of lists to linearize, the last element is the list of direct bases
 	list<list<ContractDefinition const*>> input(1, {&_contract});
-	for (ASTPointer<Identifier> const& baseIdentifier: _contract.getBaseContracts())
+	for (ASTPointer<InheritanceSpecifier> const& baseSpecifier: _contract.getBaseContracts())
 	{
+		ASTPointer<Identifier> baseName = baseSpecifier->getName();
 		ContractDefinition const* base = dynamic_cast<ContractDefinition const*>(
-														baseIdentifier->getReferencedDeclaration());
+														baseName->getReferencedDeclaration());
 		if (!base)
-			BOOST_THROW_EXCEPTION(baseIdentifier->createTypeError("Contract expected."));
+			BOOST_THROW_EXCEPTION(baseName->createTypeError("Contract expected."));
 		// "push_back" has the effect that bases mentioned earlier can overwrite members of bases
 		// mentioned later
 		input.back().push_back(base);
 		vector<ContractDefinition const*> const& basesBases = base->getLinearizedBaseContracts();
 		if (basesBases.empty())
-			BOOST_THROW_EXCEPTION(baseIdentifier->createTypeError("Definition of base has to precede definition of derived contract"));
+			BOOST_THROW_EXCEPTION(baseName->createTypeError("Definition of base has to precede definition of derived contract"));
 		input.push_front(list<ContractDefinition const*>(basesBases.begin(), basesBases.end()));
 	}
 	vector<ContractDefinition const*> result = cThreeMerge(input);

libsolidity/Parser.cpp

@@ -117,7 +117,7 @@ ASTPointer<ContractDefinition> Parser::parseContractDefinition()
 		docstring = make_shared<ASTString>(m_scanner->getCurrentCommentLiteral());
 	expectToken(Token::CONTRACT);
 	ASTPointer<ASTString> name = expectIdentifierToken();
-	vector<ASTPointer<Identifier>> baseContracts;
+	vector<ASTPointer<InheritanceSpecifier>> baseContracts;
 	vector<ASTPointer<StructDefinition>> structs;
 	vector<ASTPointer<VariableDeclaration>> stateVariables;
 	vector<ASTPointer<FunctionDefinition>> functions;
@@ -125,7 +125,7 @@ ASTPointer<ContractDefinition> Parser::parseContractDefinition()
 		do
 		{
 			m_scanner->next();
-			baseContracts.push_back(ASTNodeFactory(*this).createNode<Identifier>(expectIdentifierToken()));
+			baseContracts.push_back(parseInheritanceSpecifier());
 		}
 		while (m_scanner->getCurrentToken() == Token::COMMA);
 	expectToken(Token::LBRACE);
@@ -161,6 +161,23 @@ ASTPointer<ContractDefinition> Parser::parseContractDefinition()
 													  stateVariables, functions);
 }
 
+ASTPointer<InheritanceSpecifier> Parser::parseInheritanceSpecifier()
+{
+	ASTNodeFactory nodeFactory(*this);
+	ASTPointer<Identifier> name = ASTNodeFactory(*this).createNode<Identifier>(expectIdentifierToken());
+	vector<ASTPointer<Expression>> arguments;
+	if (m_scanner->getCurrentToken() == Token::LPAREN)
+	{
+		m_scanner->next();
+		arguments = parseFunctionCallArguments();
+		nodeFactory.markEndPosition();
+		expectToken(Token::RPAREN);
+	}
+	else
+		nodeFactory.setEndPositionFromNode(name);
+	return nodeFactory.createNode<InheritanceSpecifier>(name, arguments);
+}
+
 ASTPointer<FunctionDefinition> Parser::parseFunctionDefinition(bool _isPublic)
 {
 	ASTNodeFactory nodeFactory(*this);

libsolidity/Parser.h

@@ -49,6 +49,7 @@ private:
 	///@name Parsing functions for the AST nodes
 	ASTPointer<ImportDirective> parseImportDirective();
 	ASTPointer<ContractDefinition> parseContractDefinition();
+	ASTPointer<InheritanceSpecifier> parseInheritanceSpecifier();
 	ASTPointer<FunctionDefinition> parseFunctionDefinition(bool _isPublic);
 	ASTPointer<StructDefinition> parseStructDefinition();
 	ASTPointer<VariableDeclaration> parseVariableDeclaration(bool _allowVar);

libsolidity/grammar.txt

@@ -1,7 +1,10 @@
-ContractDefinition = 'contract' Identifier '{' ContractPart* '}'
+ContractDefinition = 'contract' Identifier
+                     ( 'is' InheritanceSpecifier (',' InheritanceSpecifier )* )?
+                     '{' ContractPart* '}'
 ContractPart = VariableDeclaration ';' | StructDefinition |
                FunctionDefinition | 'public:' | 'private:'
 
+InheritanceSpecifier = Identifier ( '(' Expression ( ',' Expression )* ')' )?
 StructDefinition = 'struct' Identifier '{'
                      ( VariableDeclaration (';' VariableDeclaration)* )? '}
 

test/SolidityParser.cpp

@@ -525,6 +525,21 @@ BOOST_AUTO_TEST_CASE(contract_multiple_inheritance)
 	BOOST_CHECK_NO_THROW(parseText(text));
 }
 
+BOOST_AUTO_TEST_CASE(contract_multiple_inheritance_with_arguments)
+{
+	char const* text = "contract base {\n"
+					   "  function fun() {\n"
+					   "    uint64(2);\n"
+					   "  }\n"
+					   "}\n"
+					   "contract derived is base(2), nonExisting(\"abc\", \"def\", base.fun()) {\n"
+					   "  function fun() {\n"
+					   "    uint64(2);\n"
+					   "  }\n"
+					   "}\n";
+	BOOST_CHECK_NO_THROW(parseText(text));
+}
+
 BOOST_AUTO_TEST_SUITE_END()
 
 }