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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/>.
*/
/**
* Module responsible for registering identifiers inside their scopes.
*/
#include <libsolidity/inlineasm/AsmScopeFiller.h>
#include <libsolidity/inlineasm/AsmData.h>
#include <libsolidity/inlineasm/AsmScope.h>
#include <libsolidity/interface/Exceptions.h>
#include <libsolidity/interface/Utils.h>
#include <boost/range/adaptor/reversed.hpp>
#include <memory>
#include <functional>
using namespace std;
using namespace dev;
using namespace dev::solidity;
using namespace dev::solidity::assembly;
ScopeFiller::ScopeFiller(ScopeFiller::Scopes& _scopes, ErrorList& _errors):
m_scopes(_scopes), m_errors(_errors)
{
// Make the Solidity ErrorTag available to inline assembly
Scope::Label errorLabel;
errorLabel.id = Scope::Label::errorLabelId;
scope(nullptr).identifiers["invalidJumpLabel"] = errorLabel;
m_currentScope = &scope(nullptr);
}
bool ScopeFiller::operator()(Label const& _item)
{
if (!m_currentScope->registerLabel(_item.name))
{
//@TODO secondary location
m_errors.push_back(make_shared<Error>(
Error::Type::DeclarationError,
"Label name " + _item.name + " already taken in this scope.",
_item.location
));
return false;
}
return true;
}
bool ScopeFiller::operator()(assembly::VariableDeclaration const& _varDecl)
{
return registerVariable(_varDecl.name, _varDecl.location, *m_currentScope);
}
bool ScopeFiller::operator()(assembly::FunctionDefinition const& _funDef)
{
bool success = true;
if (!m_currentScope->registerFunction(_funDef.name, _funDef.arguments.size(), _funDef.returns.size()))
{
//@TODO secondary location
m_errors.push_back(make_shared<Error>(
Error::Type::DeclarationError,
"Function name " + _funDef.name + " already taken in this scope.",
_funDef.location
));
success = false;
}
Scope& body = scope(&_funDef.body);
body.superScope = m_currentScope;
body.functionScope = true;
for (auto const& var: _funDef.arguments + _funDef.returns)
if (!registerVariable(var, _funDef.location, body))
success = false;
if (!(*this)(_funDef.body))
success = false;
return success;
}
bool ScopeFiller::operator()(Block const& _block)
{
bool success = true;
scope(&_block).superScope = m_currentScope;
m_currentScope = &scope(&_block);
for (auto const& s: _block.statements)
if (!boost::apply_visitor(*this, s))
success = false;
m_currentScope = m_currentScope->superScope;
return success;
}
bool ScopeFiller::registerVariable(string const& _name, SourceLocation const& _location, Scope& _scope)
{
if (!_scope.registerVariable(_name))
{
//@TODO secondary location
m_errors.push_back(make_shared<Error>(
Error::Type::DeclarationError,
"Variable name " + _name + " already taken in this scope.",
_location
));
return false;
}
return true;
}
Scope& ScopeFiller::scope(Block const* _block)
{
auto& scope = m_scopes[_block];
if (!scope)
scope = make_shared<Scope>();
return *scope;
}
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