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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 2014
* Callgraph of functions inside a contract.
*/
#include <set>
#include <queue>
#include <functional>
#include <boost/range/iterator_range.hpp>
#include <libsolidity/ASTVisitor.h>
namespace dev
{
namespace solidity
{
/**
* Can be used to compute the graph of calls (or rather references) between functions of the same
* contract. Current functionality is limited to computing all functions that are directly
* or indirectly called by some functions.
*/
class CallGraph: private ASTConstVisitor
{
public:
using FunctionOverrideResolver = std::function<FunctionDefinition const*(std::string const&)>;
using ModifierOverrideResolver = std::function<ModifierDefinition const*(std::string const&)>;
CallGraph(FunctionOverrideResolver const& _functionOverrideResolver,
ModifierOverrideResolver const& _modifierOverrideResolver):
m_functionOverrideResolver(&_functionOverrideResolver),
m_modifierOverrideResolver(&_modifierOverrideResolver) {}
void addNode(ASTNode const& _node);
std::set<FunctionDefinition const*> const& getCalls();
private:
virtual bool visit(FunctionDefinition const& _function) override;
virtual bool visit(Identifier const& _identifier) override;
virtual bool visit(MemberAccess const& _memberAccess) override;
void computeCallGraph();
FunctionOverrideResolver const* m_functionOverrideResolver;
ModifierOverrideResolver const* m_modifierOverrideResolver;
std::set<ASTNode const*> m_nodesSeen;
std::set<FunctionDefinition const*> m_functionsSeen;
std::queue<ASTNode const*> m_workQueue;
};
}
}
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