Merge pull request #251 from chriseth/bind2

Bind library functions to types.

libsolidity/analysis/NameAndTypeResolver.h

@@ -160,8 +160,8 @@ private:
 	void fatalDeclarationError(SourceLocation _sourceLocation, std::string const& _description);
 
 	std::map<ASTNode const*, DeclarationContainer>& m_scopes;
-	Declaration const* m_currentScope;
+	Declaration const* m_currentScope = nullptr;
-	VariableScope* m_currentFunction;
+	VariableScope* m_currentFunction = nullptr;
 	ErrorList& m_errors;
 };
 

libsolidity/analysis/ReferencesResolver.cpp

@@ -31,28 +31,6 @@ using namespace dev;
 using namespace dev::solidity;
 
 
-bool ReferencesResolver::visit(Return const& _return)
-{
-	_return.annotation().functionReturnParameters = m_returnParameters;
-	return true;
-}
-
-void ReferencesResolver::endVisit(NewExpression const& _new)
-{
-	typeFor(_new.typeName());
-}
-
-bool ReferencesResolver::visit(UserDefinedTypeName const& _typeName)
-{
-	Declaration const* declaration = m_resolver.pathFromCurrentScope(_typeName.namePath());
-	if (!declaration)
-		fatalDeclarationError(_typeName.location(), "Identifier not found or not unique.");
-
-	_typeName.annotation().referencedDeclaration = declaration;
-
-	return true;
-}
-
 bool ReferencesResolver::resolve(ASTNode const& _root)
 {
 	try
@@ -79,6 +57,67 @@ bool ReferencesResolver::visit(Identifier const& _identifier)
 	return false;
 }
 
+bool ReferencesResolver::visit(ElementaryTypeName const& _typeName)
+{
+	_typeName.annotation().type = Type::fromElementaryTypeName(_typeName.typeName());
+	return true;
+}
+
+void ReferencesResolver::endVisit(UserDefinedTypeName const& _typeName)
+{
+	Declaration const* declaration = m_resolver.pathFromCurrentScope(_typeName.namePath());
+	if (!declaration)
+		fatalDeclarationError(_typeName.location(), "Identifier not found or not unique.");
+
+	_typeName.annotation().referencedDeclaration = declaration;
+
+	if (StructDefinition const* structDef = dynamic_cast<StructDefinition const*>(declaration))
+		_typeName.annotation().type = make_shared<StructType>(*structDef);
+	else if (EnumDefinition const* enumDef = dynamic_cast<EnumDefinition const*>(declaration))
+		_typeName.annotation().type = make_shared<EnumType>(*enumDef);
+	else if (ContractDefinition const* contract = dynamic_cast<ContractDefinition const*>(declaration))
+		_typeName.annotation().type = make_shared<ContractType>(*contract);
+	else
+		fatalTypeError(_typeName.location(), "Name has to refer to a struct, enum or contract.");
+}
+
+void ReferencesResolver::endVisit(Mapping const& _typeName)
+{
+	TypePointer keyType = _typeName.keyType().annotation().type;
+	TypePointer valueType = _typeName.valueType().annotation().type;
+	// Convert key type to memory.
+	keyType = ReferenceType::copyForLocationIfReference(DataLocation::Memory, keyType);
+	// Convert value type to storage reference.
+	valueType = ReferenceType::copyForLocationIfReference(DataLocation::Storage, valueType);
+	_typeName.annotation().type = make_shared<MappingType>(keyType, valueType);
+}
+
+void ReferencesResolver::endVisit(ArrayTypeName const& _typeName)
+{
+	TypePointer baseType = _typeName.baseType().annotation().type;
+	if (baseType->storageBytes() == 0)
+		fatalTypeError(_typeName.baseType().location(), "Illegal base type of storage size zero for array.");
+	if (Expression const* length = _typeName.length())
+	{
+		if (!length->annotation().type)
+			ConstantEvaluator e(*length);
+
+		auto const* lengthType = dynamic_cast<IntegerConstantType const*>(length->annotation().type.get());
+		if (!lengthType)
+			fatalTypeError(length->location(), "Invalid array length.");
+		else
+			_typeName.annotation().type = make_shared<ArrayType>(DataLocation::Storage, baseType, lengthType->literalValue(nullptr));
+	}
+	else
+		_typeName.annotation().type = make_shared<ArrayType>(DataLocation::Storage, baseType);
+}
+
+bool ReferencesResolver::visit(Return const& _return)
+{
+	_return.annotation().functionReturnParameters = m_returnParameters;
+	return true;
+}
+
 void ReferencesResolver::endVisit(VariableDeclaration const& _variable)
 {
 	if (_variable.annotation().type)
@@ -87,7 +126,7 @@ void ReferencesResolver::endVisit(VariableDeclaration const& _variable)
 	TypePointer type;
 	if (_variable.typeName())
 	{
-		type = typeFor(*_variable.typeName());
+		type = _variable.typeName()->annotation().type;
 		using Location = VariableDeclaration::Location;
 		Location loc = _variable.referenceLocation();
 		// References are forced to calldata for external function parameters (not return)
@@ -167,61 +206,6 @@ void ReferencesResolver::endVisit(VariableDeclaration const& _variable)
 	_variable.annotation().type = type;
 }
 
-TypePointer ReferencesResolver::typeFor(TypeName const& _typeName)
-{
-	if (_typeName.annotation().type)
-		return _typeName.annotation().type;
-
-	TypePointer type;
-	if (auto elemTypeName = dynamic_cast<ElementaryTypeName const*>(&_typeName))
-		type = Type::fromElementaryTypeName(elemTypeName->typeName());
-	else if (auto typeName = dynamic_cast<UserDefinedTypeName const*>(&_typeName))
-	{
-		Declaration const* declaration = typeName->annotation().referencedDeclaration;
-		solAssert(!!declaration, "");
-
-		if (StructDefinition const* structDef = dynamic_cast<StructDefinition const*>(declaration))
-			type = make_shared<StructType>(*structDef);
-		else if (EnumDefinition const* enumDef = dynamic_cast<EnumDefinition const*>(declaration))
-			type = make_shared<EnumType>(*enumDef);
-		else if (ContractDefinition const* contract = dynamic_cast<ContractDefinition const*>(declaration))
-			type = make_shared<ContractType>(*contract);
-		else
-			fatalTypeError(typeName->location(), "Name has to refer to a struct, enum or contract.");
-	}
-	else if (auto mapping = dynamic_cast<Mapping const*>(&_typeName))
-	{
-		TypePointer keyType = typeFor(mapping->keyType());
-		TypePointer valueType = typeFor(mapping->valueType());
-		// Convert key type to memory.
-		keyType = ReferenceType::copyForLocationIfReference(DataLocation::Memory, keyType);
-		// Convert value type to storage reference.
-		valueType = ReferenceType::copyForLocationIfReference(DataLocation::Storage, valueType);
-		type = make_shared<MappingType>(keyType, valueType);
-	}
-	else if (auto arrayType = dynamic_cast<ArrayTypeName const*>(&_typeName))
-	{
-		TypePointer baseType = typeFor(arrayType->baseType());
-		if (baseType->storageBytes() == 0)
-			fatalTypeError(arrayType->baseType().location(), "Illegal base type of storage size zero for array.");
-		if (Expression const* length = arrayType->length())
-		{
-			if (!length->annotation().type)
-				ConstantEvaluator e(*length);
-
-			auto const* lengthType = dynamic_cast<IntegerConstantType const*>(length->annotation().type.get());
-			if (!lengthType)
-				fatalTypeError(length->location(), "Invalid array length.");
-			else
-				type = make_shared<ArrayType>(DataLocation::Storage, baseType, lengthType->literalValue(nullptr));
-		}
-		else
-			type = make_shared<ArrayType>(DataLocation::Storage, baseType);
-	}
-
-	return _typeName.annotation().type = move(type);
-}
-
 void ReferencesResolver::typeError(SourceLocation const& _location, string const& _description)
 {
 	auto err = make_shared<Error>(Error::Type::TypeError);

libsolidity/analysis/ReferencesResolver.h

@@ -60,13 +60,13 @@ public:
 private:
 	virtual bool visit(Block const&) override { return m_resolveInsideCode; }
 	virtual bool visit(Identifier const& _identifier) override;
-	virtual bool visit(UserDefinedTypeName const& _typeName) override;
+	virtual bool visit(ElementaryTypeName const& _typeName) override;
+	virtual void endVisit(UserDefinedTypeName const& _typeName) override;
+	virtual void endVisit(Mapping const& _typeName) override;
+	virtual void endVisit(ArrayTypeName const& _typeName) override;
 	virtual bool visit(Return const& _return) override;
-	virtual void endVisit(NewExpression const& _new) override;
 	virtual void endVisit(VariableDeclaration const& _variable) override;
 
-	TypePointer typeFor(TypeName const& _typeName);
-
 	/// Adds a new error to the list of errors.
 	void typeError(SourceLocation const& _location, std::string const& _description);
 

libsolidity/analysis/TypeChecker.cpp

@@ -359,6 +359,15 @@ void TypeChecker::endVisit(InheritanceSpecifier const& _inheritance)
 						);
 }
 
+void TypeChecker::endVisit(UsingForDirective const& _usingFor)
+{
+	ContractDefinition const* library = dynamic_cast<ContractDefinition const*>(
+		_usingFor.libraryName().annotation().referencedDeclaration
+	);
+	if (!library || !library->isLibrary())
+		typeError(_usingFor.libraryName().location(), "Library name expected.");
+}
+
 bool TypeChecker::visit(StructDefinition const& _struct)
 {
 	for (ASTPointer<VariableDeclaration> const& member: _struct.members())
@@ -1119,7 +1128,7 @@ bool TypeChecker::visit(MemberAccess const& _memberAccess)
 		for (auto it = possibleMembers.begin(); it != possibleMembers.end();)
 			if (
 				it->type->category() == Type::Category::Function &&
-				!dynamic_cast<FunctionType const&>(*it->type).canTakeArguments(*argumentTypes)
+				!dynamic_cast<FunctionType const&>(*it->type).canTakeArguments(*argumentTypes, exprType)
 			)
 				it = possibleMembers.erase(it);
 			else
@@ -1154,6 +1163,15 @@ bool TypeChecker::visit(MemberAccess const& _memberAccess)
 	auto& annotation = _memberAccess.annotation();
 	annotation.referencedDeclaration = possibleMembers.front().declaration;
 	annotation.type = possibleMembers.front().type;
+
+	if (auto funType = dynamic_cast<FunctionType const*>(annotation.type.get()))
+		if (funType->bound() && !exprType->isImplicitlyConvertibleTo(*funType->selfType()))
+			typeError(
+				_memberAccess.location(),
+				"Function \"" + memberName + "\" cannot be called on an object of type " +
+				exprType->toString() + " (expected " + funType->selfType()->toString() + ")"
+			);
+
 	if (exprType->category() == Type::Category::Struct)
 		annotation.isLValue = true;
 	else if (exprType->category() == Type::Category::Array)

libsolidity/analysis/TypeChecker.h

@@ -76,6 +76,7 @@ private:
 	void checkLibraryRequirements(ContractDefinition const& _contract);
 
 	virtual void endVisit(InheritanceSpecifier const& _inheritance) override;
+	virtual void endVisit(UsingForDirective const& _usingFor) override;
 	virtual bool visit(StructDefinition const& _struct) override;
 	virtual bool visit(FunctionDefinition const& _function) override;
 	virtual bool visit(VariableDeclaration const& _variable) override;

libsolidity/ast/AST.h

@@ -267,6 +267,7 @@ public:
 
 	std::vector<ASTPointer<InheritanceSpecifier>> const& baseContracts() const { return m_baseContracts; }
 	std::vector<ASTPointer<ASTNode>> const& subNodes() const { return m_subNodes; }
+	std::vector<UsingForDirective const*> usingForDirectives() const { return filteredNodes<UsingForDirective>(m_subNodes); }
 	std::vector<StructDefinition const*> definedStructs() const { return filteredNodes<StructDefinition>(m_subNodes); }
 	std::vector<EnumDefinition const*> definedEnums() const { return filteredNodes<EnumDefinition>(m_subNodes); }
 	std::vector<VariableDeclaration const*> stateVariables() const { return filteredNodes<VariableDeclaration>(m_subNodes); }
@@ -335,6 +336,33 @@ private:
 	std::vector<ASTPointer<Expression>> m_arguments;
 };
 
+/**
+ * `using LibraryName for uint` will attach all functions from the library LibraryName
+ * to `uint` if the first parameter matches the type. `using LibraryName for *` attaches
+ * the function to any matching type.
+ */
+class UsingForDirective: public ASTNode
+{
+public:
+	UsingForDirective(
+		SourceLocation const& _location,
+		ASTPointer<Identifier> const& _libraryName,
+		ASTPointer<TypeName> const& _typeName
+	):
+		ASTNode(_location), m_libraryName(_libraryName), m_typeName(_typeName) {}
+
+	virtual void accept(ASTVisitor& _visitor) override;
+	virtual void accept(ASTConstVisitor& _visitor) const override;
+
+	Identifier const& libraryName() const { return *m_libraryName; }
+	/// @returns the type name the library is attached to, null for `*`.
+	TypeName const* typeName() const { return m_typeName.get(); }
+
+private:
+	ASTPointer<Identifier> m_libraryName;
+	ASTPointer<TypeName> m_typeName;
+};
+
 class StructDefinition: public Declaration
 {
 public:

libsolidity/ast/ASTForward.h

@@ -39,6 +39,7 @@ class ImportDirective;
 class Declaration;
 class ContractDefinition;
 class InheritanceSpecifier;
+class UsingForDirective;
 class StructDefinition;
 class EnumDefinition;
 class EnumValue;

libsolidity/ast/ASTVisitor.h

@@ -47,6 +47,7 @@ public:
 	virtual bool visit(ImportDirective& _node) { return visitNode(_node); }
 	virtual bool visit(ContractDefinition& _node) { return visitNode(_node); }
 	virtual bool visit(InheritanceSpecifier& _node) { return visitNode(_node); }
+	virtual bool visit(UsingForDirective& _node) { return visitNode(_node); }
 	virtual bool visit(StructDefinition& _node) { return visitNode(_node); }
 	virtual bool visit(EnumDefinition& _node) { return visitNode(_node); }
 	virtual bool visit(EnumValue& _node) { return visitNode(_node); }
@@ -88,6 +89,7 @@ public:
 	virtual void endVisit(ImportDirective& _node) { endVisitNode(_node); }
 	virtual void endVisit(ContractDefinition& _node) { endVisitNode(_node); }
 	virtual void endVisit(InheritanceSpecifier& _node) { endVisitNode(_node); }
+	virtual void endVisit(UsingForDirective& _node) { endVisitNode(_node); }
 	virtual void endVisit(StructDefinition& _node) { endVisitNode(_node); }
 	virtual void endVisit(EnumDefinition& _node) { endVisitNode(_node); }
 	virtual void endVisit(EnumValue& _node) { endVisitNode(_node); }
@@ -142,6 +144,7 @@ public:
 	virtual bool visit(ContractDefinition const& _node) { return visitNode(_node); }
 	virtual bool visit(InheritanceSpecifier const& _node) { return visitNode(_node); }
 	virtual bool visit(StructDefinition const& _node) { return visitNode(_node); }
+	virtual bool visit(UsingForDirective const& _node) { return visitNode(_node); }
 	virtual bool visit(EnumDefinition const& _node) { return visitNode(_node); }
 	virtual bool visit(EnumValue const& _node) { return visitNode(_node); }
 	virtual bool visit(ParameterList const& _node) { return visitNode(_node); }
@@ -182,6 +185,7 @@ public:
 	virtual void endVisit(ImportDirective const& _node) { endVisitNode(_node); }
 	virtual void endVisit(ContractDefinition const& _node) { endVisitNode(_node); }
 	virtual void endVisit(InheritanceSpecifier const& _node) { endVisitNode(_node); }
+	virtual void endVisit(UsingForDirective const& _node) { endVisitNode(_node); }
 	virtual void endVisit(StructDefinition const& _node) { endVisitNode(_node); }
 	virtual void endVisit(EnumDefinition const& _node) { endVisitNode(_node); }
 	virtual void endVisit(EnumValue const& _node) { endVisitNode(_node); }

libsolidity/ast/AST_accept.h

@@ -123,6 +123,28 @@ void EnumValue::accept(ASTConstVisitor& _visitor) const
 	_visitor.endVisit(*this);
 }
 
+void UsingForDirective::accept(ASTVisitor& _visitor)
+{
+	if (_visitor.visit(*this))
+	{
+		m_libraryName->accept(_visitor);
+		if (m_typeName)
+			m_typeName->accept(_visitor);
+	}
+	_visitor.endVisit(*this);
+}
+
+void UsingForDirective::accept(ASTConstVisitor& _visitor) const
+{
+	if (_visitor.visit(*this))
+	{
+		m_libraryName->accept(_visitor);
+		if (m_typeName)
+			m_typeName->accept(_visitor);
+	}
+	_visitor.endVisit(*this);
+}
+
 void StructDefinition::accept(ASTVisitor& _visitor)
 {
 	if (_visitor.visit(*this))

libsolidity/ast/Types.cpp

@@ -86,6 +86,11 @@ MemberList& MemberList::operator=(MemberList&& _other)
 	return *this;
 }
 
+void MemberList::combine(MemberList const & _other)
+{
+	m_memberTypes += _other.m_memberTypes;
+}
+
 std::pair<u256, unsigned> const* MemberList::memberStorageOffset(string const& _name) const
 {
 	if (!m_storageOffsets)
@@ -185,7 +190,52 @@ TypePointer Type::commonType(TypePointer const& _a, TypePointer const& _b)
 		return TypePointer();
 }
 
-const MemberList Type::EmptyMemberList;
+MemberList const& Type::members(ContractDefinition const* _currentScope) const
+{
+	if (!m_members[_currentScope])
+	{
+		MemberList::MemberMap members = nativeMembers(_currentScope);
+		if (_currentScope)
+			members +=  boundFunctions(*this, *_currentScope);
+		m_members[_currentScope] = unique_ptr<MemberList>(new MemberList(move(members)));
+	}
+	return *m_members[_currentScope];
+}
+
+MemberList::MemberMap Type::boundFunctions(Type const& _type, ContractDefinition const& _scope)
+{
+	// Normalise data location of type.
+	TypePointer type = ReferenceType::copyForLocationIfReference(DataLocation::Storage, _type.shared_from_this());
+	set<Declaration const*> seenFunctions;
+	MemberList::MemberMap members;
+	for (ContractDefinition const* contract: _scope.annotation().linearizedBaseContracts)
+		for (UsingForDirective const* ufd: contract->usingForDirectives())
+		{
+			if (ufd->typeName() && *type != *ReferenceType::copyForLocationIfReference(
+				DataLocation::Storage,
+				ufd->typeName()->annotation().type
+			))
+				continue;
+			auto const& library = dynamic_cast<ContractDefinition const&>(
+				*ufd->libraryName().annotation().referencedDeclaration
+			);
+			for (auto const& it: library.interfaceFunctions())
+			{
+				FunctionType const& funType = *it.second;
+				solAssert(funType.hasDeclaration(), "Tried to bind function without declaration.");
+				if (seenFunctions.count(&funType.declaration()))
+					continue;
+				seenFunctions.insert(&funType.declaration());
+				if (auto fun = funType.asMemberFunction(true, true))
+					members.push_back(MemberList::Member(
+						funType.declaration().name(),
+						fun,
+						&funType.declaration()
+					));
+			}
+		}
+	return members;
+}
 
 IntegerType::IntegerType(int _bits, IntegerType::Modifier _modifier):
 	m_bits(_bits), m_modifier(_modifier)
@@ -273,12 +323,18 @@ TypePointer IntegerType::binaryOperatorResult(Token::Value _operator, TypePointe
 	return commonType;
 }
 
-const MemberList IntegerType::AddressMemberList({
+MemberList::MemberMap IntegerType::nativeMembers(ContractDefinition const*) const
+{
+	if (isAddress())
+		return {
 			{"balance", make_shared<IntegerType >(256)},
 			{"call", make_shared<FunctionType>(strings(), strings{"bool"}, FunctionType::Location::Bare, true)},
 			{"callcode", make_shared<FunctionType>(strings(), strings{"bool"}, FunctionType::Location::BareCallCode, true)},
 			{"send", make_shared<FunctionType>(strings{"uint"}, strings{"bool"}, FunctionType::Location::Send)}
-});
+		};
+	else
+		return MemberList::MemberMap();
+}
 
 bool IntegerConstantType::isValidLiteral(const Literal& _literal)
 {
@@ -858,10 +914,8 @@ string ArrayType::canonicalName(bool _addDataLocation) const
 	return ret;
 }
 
-MemberList const& ArrayType::members(ContractDefinition const*) const
+MemberList::MemberMap ArrayType::nativeMembers(ContractDefinition const*) const
 {
-	if (!m_members)
-	{
 	MemberList::MemberMap members;
 	if (!isString())
 	{
@@ -875,9 +929,7 @@ MemberList const& ArrayType::members(ContractDefinition const*) const
 				isByteArray() ? FunctionType::Location::ByteArrayPush : FunctionType::Location::ArrayPush
 			)});
 	}
-		m_members.reset(new MemberList(members));
+	return members;
-	}
-	return *m_members;
 }
 
 TypePointer ArrayType::encodingType() const
@@ -956,16 +1008,10 @@ string ContractType::canonicalName(bool) const
 	return m_contract.annotation().canonicalName;
 }
 
-MemberList const& ContractType::members(ContractDefinition const*) const
+MemberList::MemberMap ContractType::nativeMembers(ContractDefinition const*) const
 {
-	// We need to lazy-initialize it because of recursive references.
-	if (!m_members)
-	{
 	// All address members and all interface functions
-		MemberList::MemberMap members(
+	MemberList::MemberMap members(IntegerType(120, IntegerType::Modifier::Address).nativeMembers(nullptr));
-			IntegerType::AddressMemberList.begin(),
-			IntegerType::AddressMemberList.end()
-		);
 	if (m_super)
 	{
 		// add the most derived of all functions which are visible in derived contracts
@@ -1002,9 +1048,7 @@ MemberList const& ContractType::members(ContractDefinition const*) const
 				it.second->asMemberFunction(m_contract.isLibrary()),
 				&it.second->declaration()
 			));
-		m_members.reset(new MemberList(members));
+	return members;
-	}
-	return *m_members;
 }
 
 shared_ptr<FunctionType const> const& ContractType::constructorType() const
@@ -1099,11 +1143,8 @@ string StructType::toString(bool _short) const
 	return ret;
 }
 
-MemberList const& StructType::members(ContractDefinition const*) const
+MemberList::MemberMap StructType::nativeMembers(ContractDefinition const*) const
 {
-	// We need to lazy-initialize it because of recursive references.
-	if (!m_members)
-	{
 	MemberList::MemberMap members;
 	for (ASTPointer<VariableDeclaration> const& variable: m_struct.members())
 	{
@@ -1117,9 +1158,7 @@ MemberList const& StructType::members(ContractDefinition const*) const
 			variable.get())
 		);
 	}
-		m_members.reset(new MemberList(members));
+	return members;
-	}
-	return *m_members;
 }
 
 TypePointer StructType::interfaceType(bool _inLibrary) const
@@ -1436,6 +1475,20 @@ FunctionType::FunctionType(const EventDefinition& _event):
 	swap(paramNames, m_parameterNames);
 }
 
+std::vector<string> FunctionType::parameterNames() const
+{
+	if (!bound())
+		return m_parameterNames;
+	return vector<string>(m_parameterNames.cbegin() + 1, m_parameterNames.cend());
+}
+
+TypePointers FunctionType::parameterTypes() const
+{
+	if (!bound())
+		return m_parameterTypes;
+	return TypePointers(m_parameterTypes.cbegin() + 1, m_parameterTypes.cend());
+}
+
 bool FunctionType::operator==(Type const& _other) const
 {
 	if (_other.category() != category())
@@ -1504,6 +1557,8 @@ unsigned FunctionType::sizeOnStack() const
 		size++;
 	if (m_valueSet)
 		size++;
+	if (bound())
+		size += m_parameterTypes.front()->sizeOnStack();
 	return size;
 }
 
@@ -1533,7 +1588,7 @@ FunctionTypePointer FunctionType::interfaceFunctionType() const
 	return make_shared<FunctionType>(paramTypes, retParamTypes, m_parameterNames, m_returnParameterNames, m_location, m_arbitraryParameters);
 }
 
-MemberList const& FunctionType::members(ContractDefinition const*) const
+MemberList::MemberMap FunctionType::nativeMembers(ContractDefinition const*) const
 {
 	switch (m_location)
 	{
@@ -1544,7 +1599,6 @@ MemberList const& FunctionType::members(ContractDefinition const*) const
 	case Location::RIPEMD160:
 	case Location::Bare:
 	case Location::BareCallCode:
-		if (!m_members)
 	{
 		MemberList::MemberMap members{
 			{
@@ -1579,17 +1633,19 @@ MemberList const& FunctionType::members(ContractDefinition const*) const
 					)
 				)
 			);
-			m_members.reset(new MemberList(members));
+		return members;
 	}
-		return *m_members;
 	default:
-		return EmptyMemberList;
+		return MemberList::MemberMap();
 	}
 }
 
-bool FunctionType::canTakeArguments(TypePointers const& _argumentTypes) const
+bool FunctionType::canTakeArguments(TypePointers const& _argumentTypes, TypePointer const& _selfType) const
 {
-	TypePointers const& paramTypes = parameterTypes();
+	solAssert(!bound() || _selfType, "");
+	if (bound() && !_selfType->isImplicitlyConvertibleTo(*selfType()))
+		return false;
+	TypePointers paramTypes = parameterTypes();
 	if (takesArbitraryParameters())
 		return true;
 	else if (_argumentTypes.size() != paramTypes.size())
@@ -1678,11 +1734,12 @@ TypePointer FunctionType::copyAndSetGasOrValue(bool _setGas, bool _setValue) con
 		m_arbitraryParameters,
 		m_declaration,
 		m_gasSet || _setGas,
-		m_valueSet || _setValue
+		m_valueSet || _setValue,
+		m_bound
 	);
 }
 
-FunctionTypePointer FunctionType::asMemberFunction(bool _inLibrary) const
+FunctionTypePointer FunctionType::asMemberFunction(bool _inLibrary, bool _bound) const
 {
 	TypePointers parameterTypes;
 	for (auto const& t: m_parameterTypes)
@@ -1712,14 +1769,15 @@ FunctionTypePointer FunctionType::asMemberFunction(bool _inLibrary) const
 		m_arbitraryParameters,
 		m_declaration,
 		m_gasSet,
-		m_valueSet
+		m_valueSet,
+		_bound
 	);
 }
 
 vector<string> const FunctionType::parameterTypeNames(bool _addDataLocation) const
 {
 	vector<string> names;
-	for (TypePointer const& t: m_parameterTypes)
+	for (TypePointer const& t: parameterTypes())
 		names.push_back(t->canonicalName(_addDataLocation));
 
 	return names;
@@ -1734,6 +1792,12 @@ vector<string> const FunctionType::returnParameterTypeNames(bool _addDataLocatio
 	return names;
 }
 
+TypePointer FunctionType::selfType() const
+{
+	solAssert(bound(), "");
+	return m_parameterTypes.at(0);
+}
+
 ASTPointer<ASTString> FunctionType::documentation() const
 {
 	auto function = dynamic_cast<Documented const*>(m_declaration);
@@ -1784,11 +1848,8 @@ unsigned TypeType::sizeOnStack() const
 	return 0;
 }
 
-MemberList const& TypeType::members(ContractDefinition const* _currentScope) const
+MemberList::MemberMap TypeType::nativeMembers(ContractDefinition const* _currentScope) const
 {
-	// We need to lazy-initialize it because of recursive references.
-	if (!m_members || m_cachedScope != _currentScope)
-	{
 	MemberList::MemberMap members;
 	if (m_actualType->category() == Category::Contract)
 	{
@@ -1817,10 +1878,7 @@ MemberList const& TypeType::members(ContractDefinition const* _currentScope) con
 		for (ASTPointer<EnumValue> const& enumValue: enumDef.members())
 			members.push_back(MemberList::Member(enumValue->name(), enumType));
 	}
-		m_members.reset(new MemberList(members));
+	return members;
-		m_cachedScope = _currentScope;
-	}
-	return *m_members;
 }
 
 ModifierType::ModifierType(const ModifierDefinition& _modifier)
@@ -1866,36 +1924,6 @@ string ModifierType::toString(bool _short) const
 MagicType::MagicType(MagicType::Kind _kind):
 	m_kind(_kind)
 {
-	switch (m_kind)
-	{
-	case Kind::Block:
-		m_members = MemberList({
-			{"coinbase", make_shared<IntegerType>(0, IntegerType::Modifier::Address)},
-			{"timestamp", make_shared<IntegerType>(256)},
-			{"blockhash", make_shared<FunctionType>(strings{"uint"}, strings{"bytes32"}, FunctionType::Location::BlockHash)},
-			{"difficulty", make_shared<IntegerType>(256)},
-			{"number", make_shared<IntegerType>(256)},
-			{"gaslimit", make_shared<IntegerType>(256)}
-		});
-		break;
-	case Kind::Message:
-		m_members = MemberList({
-			{"sender", make_shared<IntegerType>(0, IntegerType::Modifier::Address)},
-			{"gas", make_shared<IntegerType>(256)},
-			{"value", make_shared<IntegerType>(256)},
-			{"data", make_shared<ArrayType>(DataLocation::CallData)},
-			{"sig", make_shared<FixedBytesType>(4)}
-		});
-		break;
-	case Kind::Transaction:
-		m_members = MemberList({
-			{"origin", make_shared<IntegerType>(0, IntegerType::Modifier::Address)},
-			{"gasprice", make_shared<IntegerType>(256)}
-		});
-		break;
-	default:
-		BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Unknown kind of magic."));
-	}
 }
 
 bool MagicType::operator==(Type const& _other) const
@@ -1906,6 +1934,37 @@ bool MagicType::operator==(Type const& _other) const
 	return other.m_kind == m_kind;
 }
 
+MemberList::MemberMap MagicType::nativeMembers(ContractDefinition const*) const
+{
+	switch (m_kind)
+	{
+	case Kind::Block:
+		return MemberList::MemberMap({
+			{"coinbase", make_shared<IntegerType>(0, IntegerType::Modifier::Address)},
+			{"timestamp", make_shared<IntegerType>(256)},
+			{"blockhash", make_shared<FunctionType>(strings{"uint"}, strings{"bytes32"}, FunctionType::Location::BlockHash)},
+			{"difficulty", make_shared<IntegerType>(256)},
+			{"number", make_shared<IntegerType>(256)},
+			{"gaslimit", make_shared<IntegerType>(256)}
+		});
+	case Kind::Message:
+		return MemberList::MemberMap({
+			{"sender", make_shared<IntegerType>(0, IntegerType::Modifier::Address)},
+			{"gas", make_shared<IntegerType>(256)},
+			{"value", make_shared<IntegerType>(256)},
+			{"data", make_shared<ArrayType>(DataLocation::CallData)},
+			{"sig", make_shared<FixedBytesType>(4)}
+		});
+	case Kind::Transaction:
+		return MemberList::MemberMap({
+			{"origin", make_shared<IntegerType>(0, IntegerType::Modifier::Address)},
+			{"gasprice", make_shared<IntegerType>(256)}
+		});
+	default:
+		BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Unknown kind of magic."));
+	}
+}
+
 string MagicType::toString(bool) const
 {
 	switch (m_kind)

libsolidity/ast/Types.h

@@ -90,6 +90,7 @@ public:
 	MemberList() {}
 	explicit MemberList(MemberMap const& _members): m_memberTypes(_members) {}
 	MemberList& operator=(MemberList&& _other);
+	void combine(MemberList const& _other);
 	TypePointer memberType(std::string const& _name) const
 	{
 		TypePointer type;
@@ -149,8 +150,6 @@ public:
 	/// @returns a pointer to _a or _b if the other is implicitly convertible to it or nullptr otherwise
 	static TypePointer commonType(TypePointer const& _a, TypePointer const& _b);
 
-	/// Calculates the
-
 	virtual Category category() const = 0;
 	virtual bool isImplicitlyConvertibleTo(Type const& _other) const { return *this == _other; }
 	virtual bool isExplicitlyConvertibleTo(Type const& _convertTo) const
@@ -216,9 +215,9 @@ public:
 		return _targetType->dataStoredIn(DataLocation::Storage) ? mobileType() : _targetType;
 	}
 
-	/// Returns the list of all members of this type. Default implementation: no members.
+	/// Returns the list of all members of this type. Default implementation: no members apart from bound.
 	/// @param _currentScope scope in which the members are accessed.
-	virtual MemberList const& members(ContractDefinition const* /*_currentScope*/) const { return EmptyMemberList; }
+	MemberList const& members(ContractDefinition const* _currentScope) const;
 	/// Convenience method, returns the type of the given named member or an empty pointer if no such member exists.
 	TypePointer memberType(std::string const& _name, ContractDefinition const* _currentScope = nullptr) const
 	{
@@ -251,9 +250,20 @@ public:
 	/// are returned without modification.
 	virtual TypePointer interfaceType(bool /*_inLibrary*/) const { return TypePointer(); }
 
+private:
+	/// @returns a member list containing all members added to this type by `using for` directives.
+	static MemberList::MemberMap boundFunctions(Type const& _type, ContractDefinition const& _scope);
+
 protected:
-	/// Convenience object used when returning an empty member list.
+	/// @returns the members native to this type depending on the given context. This function
-	static const MemberList EmptyMemberList;
+	/// is used (in conjunction with boundFunctions to fill m_members below.
+	virtual MemberList::MemberMap nativeMembers(ContractDefinition const* /*_currentScope*/) const
+	{
+		return MemberList::MemberMap();
+	}
+
+	/// List of member types (parameterised by scape), will be lazy-initialized.
+	mutable std::map<ContractDefinition const*, std::unique_ptr<MemberList>> m_members;
 };
 
 /**
@@ -281,10 +291,7 @@ public:
 	virtual unsigned storageBytes() const override { return m_bits / 8; }
 	virtual bool isValueType() const override { return true; }
 
-	virtual MemberList const& members(ContractDefinition const* /*_currentScope*/) const override
+	virtual MemberList::MemberMap nativeMembers(ContractDefinition const*) const override;
-	{
-		return isAddress() ? AddressMemberList : EmptyMemberList;
-	}
 
 	virtual std::string toString(bool _short) const override;
 
@@ -295,8 +302,6 @@ public:
 	bool isAddress() const { return m_modifier == Modifier::Address; }
 	bool isSigned() const { return m_modifier == Modifier::Signed; }
 
-	static const MemberList AddressMemberList;
-
 private:
 	int m_bits;
 	Modifier m_modifier;
@@ -517,7 +522,7 @@ public:
 	virtual unsigned sizeOnStack() const override;
 	virtual std::string toString(bool _short) const override;
 	virtual std::string canonicalName(bool _addDataLocation) const override;
-	virtual MemberList const& members(ContractDefinition const* _currentScope) const override;
+	virtual MemberList::MemberMap nativeMembers(ContractDefinition const* _currentScope) const override;
 	virtual TypePointer encodingType() const override;
 	virtual TypePointer decodingType() const override;
 	virtual TypePointer interfaceType(bool _inLibrary) const override;
@@ -541,8 +546,6 @@ private:
 	TypePointer m_baseType;
 	bool m_hasDynamicLength = true;
 	u256 m_length;
-	/// List of member types, will be lazy-initialized because of recursive references.
-	mutable std::unique_ptr<MemberList> m_members;
 };
 
 /**
@@ -570,7 +573,7 @@ public:
 	virtual std::string toString(bool _short) const override;
 	virtual std::string canonicalName(bool _addDataLocation) const override;
 
-	virtual MemberList const& members(ContractDefinition const* _currentScope) const override;
+	virtual MemberList::MemberMap nativeMembers(ContractDefinition const* _currentScope) const override;
 	virtual TypePointer encodingType() const override
 	{
 		return std::make_shared<IntegerType>(160, IntegerType::Modifier::Address);
@@ -602,8 +605,6 @@ private:
 	bool m_super = false;
 	/// Type of the constructor, @see constructorType. Lazily initialized.
 	mutable FunctionTypePointer m_constructorType;
-	/// List of member types, will be lazy-initialized because of recursive references.
-	mutable std::unique_ptr<MemberList> m_members;
 };
 
 /**
@@ -623,7 +624,7 @@ public:
 	virtual bool canLiveOutsideStorage() const override { return true; }
 	virtual std::string toString(bool _short) const override;
 
-	virtual MemberList const& members(ContractDefinition const* _currentScope) const override;
+	virtual MemberList::MemberMap nativeMembers(ContractDefinition const* _currentScope) const override;
 	virtual TypePointer encodingType() const override
 	{
 		return location() == DataLocation::Storage ? std::make_shared<IntegerType>(256) : TypePointer();
@@ -648,8 +649,6 @@ public:
 
 private:
 	StructDefinition const& m_struct;
-	/// List of member types, will be lazy-initialized because of recursive references.
-	mutable std::unique_ptr<MemberList> m_members;
 };
 
 /**
@@ -688,8 +687,6 @@ public:
 
 private:
 	EnumDefinition const& m_enum;
-	/// List of member types, will be lazy-initialized because of recursive references.
-	mutable std::unique_ptr<MemberList> m_members;
 };
 
 /**
@@ -791,7 +788,8 @@ public:
 		bool _arbitraryParameters = false,
 		Declaration const* _declaration = nullptr,
 		bool _gasSet = false,
-		bool _valueSet = false
+		bool _valueSet = false,
+		bool _bound = false
 	):
 		m_parameterTypes(_parameterTypes),
 		m_returnParameterTypes(_returnParameterTypes),
@@ -801,15 +799,18 @@ public:
 		m_arbitraryParameters(_arbitraryParameters),
 		m_gasSet(_gasSet),
 		m_valueSet(_valueSet),
+		m_bound(_bound),
 		m_declaration(_declaration)
 	{}
 
-	TypePointers const& parameterTypes() const { return m_parameterTypes; }
+	TypePointers parameterTypes() const;
-	std::vector<std::string> const& parameterNames() const { return m_parameterNames; }
+	std::vector<std::string> parameterNames() const;
 	std::vector<std::string> const parameterTypeNames(bool _addDataLocation) const;
 	TypePointers const& returnParameterTypes() const { return m_returnParameterTypes; }
 	std::vector<std::string> const& returnParameterNames() const { return m_returnParameterNames; }
 	std::vector<std::string> const returnParameterTypeNames(bool _addDataLocation) const;
+	/// @returns the "self" parameter type for a bound function
+	TypePointer selfType() const;
 
 	virtual bool operator==(Type const& _other) const override;
 	virtual std::string toString(bool _short) const override;
@@ -817,7 +818,7 @@ public:
 	virtual u256 storageSize() const override;
 	virtual bool canLiveOutsideStorage() const override { return false; }
 	virtual unsigned sizeOnStack() const override;
-	virtual MemberList const& members(ContractDefinition const* _currentScope) const override;
+	virtual MemberList::MemberMap nativeMembers(ContractDefinition const* _currentScope) const override;
 
 	/// @returns TypePointer of a new FunctionType object. All input/return parameters are an
 	/// appropriate external types (i.e. the interfaceType()s) of input/return parameters of
@@ -828,7 +829,9 @@ public:
 
 	/// @returns true if this function can take the given argument types (possibly
 	/// after implicit conversion).
-	bool canTakeArguments(TypePointers const& _arguments) const;
+	/// @param _selfType if the function is bound, this has to be supplied and is the type of the
+	/// expression the function is called on.
+	bool canTakeArguments(TypePointers const& _arguments, TypePointer const& _selfType = TypePointer()) const;
 	/// @returns true if the types of parameters are equal (does't check return parameter types)
 	bool hasEqualArgumentTypes(FunctionType const& _other) const;
 
@@ -855,6 +858,7 @@ public:
 	bool takesArbitraryParameters() const { return m_arbitraryParameters; }
 	bool gasSet() const { return m_gasSet; }
 	bool valueSet() const { return m_valueSet; }
+	bool bound() const { return m_bound; }
 
 	/// @returns a copy of this type, where gas or value are set manually. This will never set one
 	/// of the parameters to fals.
@@ -865,7 +869,8 @@ public:
 	/// This is needed if external functions are called on other contracts, as they cannot return
 	/// dynamic values.
 	/// @param _inLibrary if true, uses CallCode as location.
-	FunctionTypePointer asMemberFunction(bool _inLibrary) const;
+	/// @param _bound if true, the argumenst are placed as `arg1.functionName(arg2, ..., argn)`.
+	FunctionTypePointer asMemberFunction(bool _inLibrary, bool _bound = false) const;
 
 private:
 	static TypePointers parseElementaryTypeVector(strings const& _types);
@@ -879,8 +884,8 @@ private:
 	bool const m_arbitraryParameters = false;
 	bool const m_gasSet = false; ///< true iff the gas value to be used is on the stack
 	bool const m_valueSet = false; ///< true iff the value to be sent is on the stack
+	bool const m_bound = false; ///< true iff the function is called as arg1.fun(arg2, ..., argn)
 	bool m_isConstant = false;
-	mutable std::unique_ptr<MemberList> m_members;
 	Declaration const* m_declaration = nullptr;
 };
 
@@ -935,13 +940,10 @@ public:
 	virtual bool canLiveOutsideStorage() const override { return false; }
 	virtual unsigned sizeOnStack() const override;
 	virtual std::string toString(bool _short) const override { return "type(" + m_actualType->toString(_short) + ")"; }
-	virtual MemberList const& members(ContractDefinition const* _currentScope) const override;
+	virtual MemberList::MemberMap nativeMembers(ContractDefinition const* _currentScope) const override;
 
 private:
 	TypePointer m_actualType;
-	/// List of member types, will be lazy-initialized because of recursive references.
-	mutable std::unique_ptr<MemberList> m_members;
-	mutable ContractDefinition const* m_cachedScope = nullptr;
 };
 
 
@@ -988,14 +990,12 @@ public:
 	virtual bool canBeStored() const override { return false; }
 	virtual bool canLiveOutsideStorage() const override { return true; }
 	virtual unsigned sizeOnStack() const override { return 0; }
-	virtual MemberList const& members(ContractDefinition const*) const override { return m_members; }
+	virtual MemberList::MemberMap nativeMembers(ContractDefinition const*) const override;
 
 	virtual std::string toString(bool _short) const override;
 
 private:
 	Kind m_kind;
-
-	MemberList m_members;
 };
 
 }

libsolidity/codegen/ExpressionCompiler.cpp

@@ -672,7 +672,7 @@ bool ExpressionCompiler::visit(FunctionCall const& _functionCall)
 			_functionCall.expression().accept(*this);
 			solAssert(function.parameterTypes().size() == 1, "");
 			solAssert(!!function.parameterTypes()[0], "");
-			TypePointer const& paramType = function.parameterTypes()[0];
+			TypePointer paramType = function.parameterTypes()[0];
 			shared_ptr<ArrayType> arrayType =
 				function.location() == Location::ArrayPush ?
 				make_shared<ArrayType>(DataLocation::Storage, paramType) :

libsolidity/parsing/Parser.cpp

@@ -168,6 +168,8 @@ ASTPointer<ContractDefinition> Parser::parseContractDefinition(bool _isLibrary)
 			subNodes.push_back(parseModifierDefinition());
 		else if (currentTokenValue == Token::Event)
 			subNodes.push_back(parseEventDefinition());
+		else if (currentTokenValue == Token::Using)
+			subNodes.push_back(parseUsingDirective());
 		else
 			fatalParserError(std::string("Function, variable, struct or modifier declaration expected."));
 	}
@@ -475,6 +477,24 @@ ASTPointer<EventDefinition> Parser::parseEventDefinition()
 	return nodeFactory.createNode<EventDefinition>(name, docstring, parameters, anonymous);
 }
 
+ASTPointer<UsingForDirective> Parser::parseUsingDirective()
+{
+	ASTNodeFactory nodeFactory(*this);
+
+	expectToken(Token::Using);
+	//@todo this should actually parse a full path.
+	ASTPointer<Identifier> library(parseIdentifier());
+	ASTPointer<TypeName> typeName;
+	expectToken(Token::For);
+	if (m_scanner->currentToken() == Token::Mul)
+		m_scanner->next();
+	else
+		typeName = parseTypeName(false);
+	nodeFactory.markEndPosition();
+	expectToken(Token::Semicolon);
+	return nodeFactory.createNode<UsingForDirective>(library, typeName);
+}
+
 ASTPointer<ModifierInvocation> Parser::parseModifierInvocation()
 {
 	ASTNodeFactory nodeFactory(*this);

libsolidity/parsing/Parser.h

@@ -74,6 +74,7 @@ private:
 	);
 	ASTPointer<ModifierDefinition> parseModifierDefinition();
 	ASTPointer<EventDefinition> parseEventDefinition();
+	ASTPointer<UsingForDirective> parseUsingDirective();
 	ASTPointer<ModifierInvocation> parseModifierInvocation();
 	ASTPointer<Identifier> parseIdentifier();
 	ASTPointer<TypeName> parseTypeName(bool _allowVar);

test/libsolidity/SolidityNameAndTypeResolution.cpp

@@ -2529,6 +2529,166 @@ BOOST_AUTO_TEST_CASE(member_access_parser_ambiguity)
 	BOOST_CHECK(success(text));
 }
 
+BOOST_AUTO_TEST_CASE(using_for_library)
+{
+	char const* text = R"(
+		library D { }
+		contract C {
+			using D for uint;
+		}
+	)";
+	BOOST_CHECK(success(text));
+}
+
+BOOST_AUTO_TEST_CASE(using_for_not_library)
+{
+	char const* text = R"(
+		contract D { }
+		contract C {
+			using D for uint;
+		}
+	)";
+	BOOST_CHECK(expectError(text) == Error::Type::TypeError);
+}
+
+BOOST_AUTO_TEST_CASE(using_for_function_exists)
+{
+	char const* text = R"(
+		library D { function double(uint self) returns (uint) { return 2*self; } }
+		contract C {
+			using D for uint;
+			function f(uint a) {
+				a.double;
+			}
+		}
+	)";
+	BOOST_CHECK(success(text));
+}
+
+BOOST_AUTO_TEST_CASE(using_for_function_on_int)
+{
+	char const* text = R"(
+		library D { function double(uint self) returns (uint) { return 2*self; } }
+		contract C {
+			using D for uint;
+			function f(uint a) returns (uint) {
+				return a.double();
+			}
+		}
+	)";
+	BOOST_CHECK(success(text));
+}
+
+BOOST_AUTO_TEST_CASE(using_for_function_on_struct)
+{
+	char const* text = R"(
+		library D { struct s { uint a; } function mul(s storage self, uint x) returns (uint) { return self.a *= x; } }
+		contract C {
+			using D for D.s;
+			D.s x;
+			function f(uint a) returns (uint) {
+				return x.mul(a);
+			}
+		}
+	)";
+	BOOST_CHECK(success(text));
+}
+
+BOOST_AUTO_TEST_CASE(using_for_overload)
+{
+	char const* text = R"(
+		library D {
+			struct s { uint a; }
+			function mul(s storage self, uint x) returns (uint) { return self.a *= x; }
+			function mul(s storage self, bytes32 x) returns (bytes32) { }
+		}
+		contract C {
+			using D for D.s;
+			D.s x;
+			function f(uint a) returns (uint) {
+				return x.mul(a);
+			}
+		}
+	)";
+	BOOST_CHECK(success(text));
+}
+
+BOOST_AUTO_TEST_CASE(using_for_by_name)
+{
+	char const* text = R"(
+		library D { struct s { uint a; } function mul(s storage self, uint x) returns (uint) { return self.a *= x; } }
+		contract C {
+			using D for D.s;
+			D.s x;
+			function f(uint a) returns (uint) {
+				return x.mul({x: a});
+			}
+		}
+	)";
+	BOOST_CHECK(success(text));
+}
+
+BOOST_AUTO_TEST_CASE(using_for_mismatch)
+{
+	char const* text = R"(
+		library D { function double(bytes32 self) returns (uint) { return 2; } }
+		contract C {
+			using D for uint;
+			function f(uint a) returns (uint) {
+				return a.double();
+			}
+		}
+	)";
+	BOOST_CHECK(expectError(text) == Error::Type::TypeError);
+}
+
+BOOST_AUTO_TEST_CASE(using_for_not_used)
+{
+	// This is an error because the function is only bound to uint.
+	// Had it been bound to *, it would have worked.
+	char const* text = R"(
+		library D { function double(uint self) returns (uint) { return 2; } }
+		contract C {
+			using D for uint;
+			function f(uint16 a) returns (uint) {
+				return a.double();
+			}
+		}
+	)";
+	BOOST_CHECK(expectError(text) == Error::Type::TypeError);
+}
+
+BOOST_AUTO_TEST_CASE(using_for_arbitrary_mismatch)
+{
+	// Bound to a, but self type does not match.
+	char const* text = R"(
+		library D { function double(bytes32 self) returns (uint) { return 2; } }
+		contract C {
+			using D for *;
+			function f(uint a) returns (uint) {
+				return a.double();
+			}
+		}
+	)";
+	BOOST_CHECK(expectError(text) == Error::Type::TypeError);
+}
+
+BOOST_AUTO_TEST_CASE(bound_function_in_var)
+{
+	char const* text = R"(
+		library D { struct s { uint a; } function mul(s storage self, uint x) returns (uint) { return self.a *= x; } }
+		contract C {
+			using D for D.s;
+			D.s x;
+			function f(uint a) returns (uint) {
+				var g = x.mul;
+				return g({x: a});
+			}
+		}
+	)";
+	BOOST_CHECK(success(text));
+}
+
 BOOST_AUTO_TEST_CASE(create_memory_arrays)
 {
 	char const* text = R"(

test/libsolidity/SolidityParser.cpp

@@ -1032,6 +1032,21 @@ BOOST_AUTO_TEST_CASE(member_access_parser_ambiguity)
 	BOOST_CHECK(successParse(text));
 }
 
+BOOST_AUTO_TEST_CASE(using_for)
+{
+	char const* text = R"(
+		contract C {
+			struct s { uint a; }
+			using LibraryName for uint;
+			using Library2 for *;
+			using Lib for s;
+			function f() {
+			}
+		}
+	)";
+	BOOST_CHECK(successParse(text));
+}
+
 BOOST_AUTO_TEST_SUITE_END()
 
 }