mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
99 lines
2.2 KiB
C++
99 lines
2.2 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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/**
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* Scopes for identifiers.
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*/
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#include <libyul/AsmScope.h>
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using namespace std;
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using namespace dev;
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using namespace yul;
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bool Scope::registerLabel(YulString _name)
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{
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if (exists(_name))
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return false;
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identifiers[_name] = Label();
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return true;
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}
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bool Scope::registerVariable(YulString _name, YulType const& _type)
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{
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if (exists(_name))
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return false;
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Variable variable;
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variable.type = _type;
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identifiers[_name] = variable;
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return true;
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}
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bool Scope::registerFunction(YulString _name, std::vector<YulType> _arguments, std::vector<YulType> _returns)
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{
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if (exists(_name))
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return false;
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identifiers[_name] = Function{std::move(_arguments), std::move(_returns)};
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return true;
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}
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Scope::Identifier* Scope::lookup(YulString _name)
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{
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bool crossedFunctionBoundary = false;
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for (Scope* s = this; s; s = s->superScope)
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{
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auto id = s->identifiers.find(_name);
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if (id != s->identifiers.end())
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{
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if (crossedFunctionBoundary && holds_alternative<Scope::Variable>(id->second))
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return nullptr;
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else
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return &id->second;
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}
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if (s->functionScope)
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crossedFunctionBoundary = true;
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}
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return nullptr;
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}
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bool Scope::exists(YulString _name) const
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{
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if (identifiers.count(_name))
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return true;
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else if (superScope)
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return superScope->exists(_name);
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else
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return false;
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}
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size_t Scope::numberOfVariables() const
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{
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size_t count = 0;
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for (auto const& identifier: identifiers)
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if (holds_alternative<Scope::Variable>(identifier.second))
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count++;
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return count;
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}
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bool Scope::insideFunction() const
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{
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for (Scope const* s = this; s; s = s->superScope)
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if (s->functionScope)
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return true;
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return false;
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}
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