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diff --git a/libsolidity/ast/ASTAnnotations.h b/libsolidity/ast/ASTAnnotations.h
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+/*
+	This file is part of cpp-ethereum.
+
+	cpp-ethereum is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	cpp-ethereum is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/**
+ * @author Christian <c@ethdev.com>
+ * @date 2015
+ * Object containing the type and other annotations for the AST nodes.
+ */
+
+#pragma once
+
+#include <map>
+#include <memory>
+#include <vector>
+#include <set>
+#include <libsolidity/ast/ASTForward.h>
+
+namespace dev
+{
+namespace solidity
+{
+
+class Type;
+using TypePointer = std::shared_ptr<Type const>;
+
+struct ASTAnnotation
+{
+	virtual ~ASTAnnotation() {}
+};
+
+struct TypeDeclarationAnnotation: ASTAnnotation
+{
+	/// The name of this type, prefixed by proper namespaces if globally accessible.
+	std::string canonicalName;
+};
+
+struct ContractDefinitionAnnotation: TypeDeclarationAnnotation
+{
+	/// Whether all functions are implemented.
+	bool isFullyImplemented = true;
+	/// List of all (direct and indirect) base contracts in order from derived to
+	/// base, including the contract itself.
+	std::vector<ContractDefinition const*> linearizedBaseContracts;
+	/// List of contracts this contract creates, i.e. which need to be compiled first.
+	/// Also includes all contracts from @a linearizedBaseContracts.
+	std::set<ContractDefinition const*> contractDependencies;
+};
+
+struct VariableDeclarationAnnotation: ASTAnnotation
+{
+	/// Type of variable (type of identifier referencing this variable).
+	TypePointer type;
+};
+
+struct ReturnAnnotation: ASTAnnotation
+{
+	/// Reference to the return parameters of the function.
+	ParameterList const* functionReturnParameters = nullptr;
+};
+
+struct TypeNameAnnotation: ASTAnnotation
+{
+	/// Type declared by this type name, i.e. type of a variable where this type name is used.
+	/// Set during reference resolution stage.
+	TypePointer type;
+};
+
+struct UserDefinedTypeNameAnnotation: TypeNameAnnotation
+{
+	/// Referenced declaration, set during reference resolution stage.
+	Declaration const* referencedDeclaration = nullptr;
+};
+
+struct VariableDeclarationStatementAnnotation: ASTAnnotation
+{
+	/// Information about which component of the value is assigned to which variable.
+	/// The pointer can be null to signify that the component is discarded.
+	std::vector<VariableDeclaration const*> assignments;
+};
+
+struct ExpressionAnnotation: ASTAnnotation
+{
+	/// Inferred type of the expression.
+	TypePointer type;
+	/// Whether it is an LValue (i.e. something that can be assigned to).
+	bool isLValue = false;
+	/// Whether the expression is used in a context where the LValue is actually required.
+	bool lValueRequested = false;
+	/// Types of arguments if the expression is a function that is called - used
+	/// for overload resolution.
+	std::shared_ptr<std::vector<TypePointer>> argumentTypes;
+};
+
+struct IdentifierAnnotation: ExpressionAnnotation
+{
+	/// Stores a reference to the current contract.
+	/// This is needed because types of base contracts change depending on the context.
+	ContractDefinition const* contractScope = nullptr;
+	/// Referenced declaration, set at latest during overload resolution stage.
+	Declaration const* referencedDeclaration = nullptr;
+	/// List of possible declarations it could refer to.
+	std::vector<Declaration const*> overloadedDeclarations;
+};
+
+struct MemberAccessAnnotation: ExpressionAnnotation
+{
+	/// Referenced declaration, set at latest during overload resolution stage.
+	Declaration const* referencedDeclaration = nullptr;
+};
+
+struct BinaryOperationAnnotation: ExpressionAnnotation
+{
+	/// The common type that is used for the operation, not necessarily the result type (which
+	/// e.g. for comparisons is bool).
+	TypePointer commonType;
+};
+
+struct FunctionCallAnnotation: ExpressionAnnotation
+{
+	/// Whether this is an explicit type conversion.
+	bool isTypeConversion = false;
+	/// Whether this is a struct constructor call.
+	bool isStructConstructorCall = false;
+};
+
+}
+}