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61 lines
1.7 KiB
61 lines
1.7 KiB
/*
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This file is part of cpp-ethereum.
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cpp-ethereum 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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cpp-ethereum 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 cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @author Christian <c@ethdev.com>
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* @date 2014
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* Scope - object that holds declaration of names.
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*/
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#pragma once
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#include <map>
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#include <libsolidity/ASTForward.h>
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namespace dev {
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namespace solidity {
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class Scope
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{
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public:
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explicit Scope(Scope* _outerScope = nullptr) : m_outerScope(_outerScope) {}
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/// Registers the name _name in the scope unless it is already declared. Returns true iff
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/// it was not yet declared.
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bool registerName(ASTString const& _name, ASTNode& _declaration)
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{
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if (m_declaredNames.find(_name) != m_declaredNames.end())
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return false;
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m_declaredNames[_name] = &_declaration;
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return true;
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}
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ASTNode* resolveName(ASTString const& _name, bool _recursive = false) const
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{
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auto result = m_declaredNames.find(_name);
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if (result != m_declaredNames.end())
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return result->second;
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if (_recursive && m_outerScope != nullptr)
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return m_outerScope->resolveName(_name, true);
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return nullptr;
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}
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Scope* getOuterScope() const { return m_outerScope; }
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private:
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Scope* m_outerScope;
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std::map<ASTString, ASTNode*> m_declaredNames;
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};
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} }
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