path: root/libsolidity/ASTAnnotations.h

/*
    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/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 vaule 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;
};

}
}