mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
66 lines
2.6 KiB
C++
66 lines
2.6 KiB
C++
/*
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This file is part of solidity.
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solidity is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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solidity is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with solidity. If not, see <http://www.gnu.org/licenses/>.
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*/
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// SPDX-License-Identifier: GPL-3.0
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#pragma once
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#include <libsolidity/ast/ASTVisitor.h>
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#include <vector>
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#include <set>
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namespace solidity::frontend::smt
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{
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/**
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* This class computes information about which variables are modified in a certain subtree.
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*/
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class VariableUsage: private ASTConstVisitor
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{
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public:
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/// @param _outerCallstack the current callstack in the callers context.
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std::set<VariableDeclaration const*> touchedVariables(ASTNode const& _node, std::vector<CallableDeclaration const*> const& _outerCallstack);
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/// Sets whether to inline function calls.
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void setFunctionInlining(std::function<bool(FunctionCall const&, ContractDefinition const*, ContractDefinition const*)> _inlineFunctionCalls) { m_inlineFunctionCalls = _inlineFunctionCalls; }
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void setCurrentContract(ContractDefinition const& _contract) { m_currentContract = &_contract; }
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void setCurrentFunction(FunctionDefinition const& _function) { m_currentFunction = &_function; }
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private:
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void endVisit(Identifier const& _node) override;
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void endVisit(IndexAccess const& _node) override;
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void endVisit(FunctionCall const& _node) override;
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bool visit(FunctionDefinition const& _node) override;
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void endVisit(FunctionDefinition const& _node) override;
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void endVisit(ModifierInvocation const& _node) override;
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void endVisit(PlaceholderStatement const& _node) override;
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/// Checks whether an identifier should be added to touchedVariables.
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void checkIdentifier(Identifier const& _identifier);
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std::set<VariableDeclaration const*> m_touchedVariables;
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std::vector<CallableDeclaration const*> m_callStack;
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CallableDeclaration const* m_lastCall = nullptr;
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ContractDefinition const* m_currentContract = nullptr;
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FunctionDefinition const* m_currentFunction = nullptr;
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std::function<bool(FunctionCall const&, ContractDefinition const*, ContractDefinition const*)> m_inlineFunctionCalls = [](FunctionCall const&, ContractDefinition const*, ContractDefinition const*) { return false; };
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};
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}
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