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/*
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/>.
*/
/**
* Scopes for identifiers.
*/
#include <libsolidity/inlineasm/AsmScope.h>
using namespace std;
using namespace dev;
using namespace dev::solidity::assembly;
bool Scope::registerLabel(yul::YulString _name)
{
if (exists(_name))
return false;
identifiers[_name] = Label();
return true;
}
bool Scope::registerVariable(yul::YulString _name, YulType const& _type)
{
if (exists(_name))
return false;
Variable variable;
variable.type = _type;
identifiers[_name] = variable;
return true;
}
bool Scope::registerFunction(yul::YulString _name, std::vector<YulType> const& _arguments, std::vector<YulType> const& _returns)
{
if (exists(_name))
return false;
identifiers[_name] = Function{_arguments, _returns};
return true;
}
Scope::Identifier* Scope::lookup(yul::YulString _name)
{
bool crossedFunctionBoundary = false;
for (Scope* s = this; s; s = s->superScope)
{
auto id = s->identifiers.find(_name);
if (id != s->identifiers.end())
{
if (crossedFunctionBoundary && id->second.type() == typeid(Scope::Variable))
return nullptr;
else
return &id->second;
}
if (s->functionScope)
crossedFunctionBoundary = true;
}
return nullptr;
}
bool Scope::exists(yul::YulString _name) const
{
if (identifiers.count(_name))
return true;
else if (superScope)
return superScope->exists(_name);
else
return false;
}
size_t Scope::numberOfVariables() const
{
size_t count = 0;
for (auto const& identifier: identifiers)
if (identifier.second.type() == typeid(Scope::Variable))
count++;
return count;
}
bool Scope::insideFunction() const
{
for (Scope const* s = this; s; s = s->superScope)
if (s->functionScope)
return true;
return false;
}
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