path: root/libsolidity/formal/VariableUsage.h

/*
    This file is part of solidity.

    solidity 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.

    solidity 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 solidity.  If not, see <http://www.gnu.org/licenses/>.
*/

#pragma once

#include <map>
#include <set>
#include <vector>

namespace dev
{
namespace solidity
{

class ASTNode;
class VariableDeclaration;

/**
 * This class collects information about which local variables of value type
 * are modified in which parts of the AST.
 */
class VariableUsage
{
public:
    explicit VariableUsage(ASTNode const& _node);

    std::vector<VariableDeclaration const*> touchedVariables(ASTNode const& _node) const;

private:
    // Variable touched by a specific AST node.
    std::map<ASTNode const*, VariableDeclaration const*> m_touchedVariable;
    std::map<ASTNode const*, std::vector<ASTNode const*>> m_children;
};

}
}