/*
	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 <libsolidity/analysis/ControlFlowGraph.h>

#include <set>

namespace dev
{
namespace solidity
{

class ControlFlowAnalyzer: private ASTConstVisitor
{
public:
	explicit ControlFlowAnalyzer(CFG const& _cfg, langutil::ErrorReporter& _errorReporter):
		m_cfg(_cfg), m_errorReporter(_errorReporter) {}

	bool analyze(ASTNode const& _astRoot);

	bool visit(FunctionDefinition const& _function) override;

private:
	static std::set<VariableDeclaration const*> variablesAssignedInNode(CFGNode const *node);
	void checkUnassignedStorageReturnValues(
		FunctionDefinition const& _function,
		CFGNode const* _functionEntry,
		CFGNode const* _functionExit
	) const;

	CFG const& m_cfg;
	langutil::ErrorReporter& m_errorReporter;
};

}
}