mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
137 lines
4.1 KiB
C++
137 lines
4.1 KiB
C++
/*
|
|
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/>.
|
|
*/
|
|
|
|
#include <libsolidity/analysis/PostTypeChecker.h>
|
|
|
|
#include <libsolidity/ast/AST.h>
|
|
#include <libsolidity/interface/Version.h>
|
|
#include <liblangutil/ErrorReporter.h>
|
|
#include <liblangutil/SemVerHandler.h>
|
|
#include <libdevcore/Algorithms.h>
|
|
|
|
#include <boost/range/adaptor/map.hpp>
|
|
#include <memory>
|
|
|
|
using namespace std;
|
|
using namespace dev;
|
|
using namespace langutil;
|
|
using namespace dev::solidity;
|
|
|
|
|
|
bool PostTypeChecker::check(ASTNode const& _astRoot)
|
|
{
|
|
_astRoot.accept(*this);
|
|
return Error::containsOnlyWarnings(m_errorReporter.errors());
|
|
}
|
|
|
|
bool PostTypeChecker::visit(ContractDefinition const&)
|
|
{
|
|
solAssert(!m_currentConstVariable, "");
|
|
solAssert(m_constVariableDependencies.empty(), "");
|
|
return true;
|
|
}
|
|
|
|
void PostTypeChecker::endVisit(ContractDefinition const&)
|
|
{
|
|
solAssert(!m_currentConstVariable, "");
|
|
for (auto declaration: m_constVariables)
|
|
if (auto identifier = findCycle(*declaration))
|
|
m_errorReporter.typeError(
|
|
declaration->location(),
|
|
"The value of the constant " + declaration->name() +
|
|
" has a cyclic dependency via " + identifier->name() + "."
|
|
);
|
|
|
|
m_constVariables.clear();
|
|
m_constVariableDependencies.clear();
|
|
}
|
|
|
|
void PostTypeChecker::endVisit(OverrideSpecifier const& _overrideSpecifier)
|
|
{
|
|
for (ASTPointer<UserDefinedTypeName> const& override: _overrideSpecifier.overrides())
|
|
{
|
|
Declaration const* decl = override->annotation().referencedDeclaration;
|
|
solAssert(decl, "Expected declaration to be resolved.");
|
|
|
|
if (dynamic_cast<ContractDefinition const*>(decl))
|
|
continue;
|
|
|
|
TypeType const* actualTypeType = dynamic_cast<TypeType const*>(decl->type());
|
|
|
|
m_errorReporter.typeError(
|
|
override->location(),
|
|
"Expected contract but got " +
|
|
actualTypeType->actualType()->toString(true) +
|
|
"."
|
|
);
|
|
}
|
|
}
|
|
|
|
bool PostTypeChecker::visit(VariableDeclaration const& _variable)
|
|
{
|
|
solAssert(!m_currentConstVariable, "");
|
|
if (_variable.isConstant())
|
|
{
|
|
m_currentConstVariable = &_variable;
|
|
m_constVariables.push_back(&_variable);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
void PostTypeChecker::endVisit(VariableDeclaration const& _variable)
|
|
{
|
|
if (_variable.isConstant())
|
|
{
|
|
solAssert(m_currentConstVariable == &_variable, "");
|
|
m_currentConstVariable = nullptr;
|
|
}
|
|
}
|
|
|
|
bool PostTypeChecker::visit(Identifier const& _identifier)
|
|
{
|
|
if (m_currentConstVariable)
|
|
if (auto var = dynamic_cast<VariableDeclaration const*>(_identifier.annotation().referencedDeclaration))
|
|
if (var->isConstant())
|
|
m_constVariableDependencies[m_currentConstVariable].insert(var);
|
|
return true;
|
|
}
|
|
|
|
VariableDeclaration const* PostTypeChecker::findCycle(VariableDeclaration const& _startingFrom)
|
|
{
|
|
auto visitor = [&](VariableDeclaration const& _variable, CycleDetector<VariableDeclaration>& _cycleDetector, size_t _depth)
|
|
{
|
|
if (_depth >= 256)
|
|
m_errorReporter.fatalDeclarationError(_variable.location(), "Variable definition exhausting cyclic dependency validator.");
|
|
|
|
// Iterating through the dependencies needs to be deterministic and thus cannot
|
|
// depend on the memory layout.
|
|
// Because of that, we sort by AST node id.
|
|
vector<VariableDeclaration const*> dependencies(
|
|
m_constVariableDependencies[&_variable].begin(),
|
|
m_constVariableDependencies[&_variable].end()
|
|
);
|
|
sort(dependencies.begin(), dependencies.end(), [](VariableDeclaration const* _a, VariableDeclaration const* _b) -> bool
|
|
{
|
|
return _a->id() < _b->id();
|
|
});
|
|
for (auto v: dependencies)
|
|
if (_cycleDetector.run(*v))
|
|
return;
|
|
};
|
|
return CycleDetector<VariableDeclaration>(visitor).run(_startingFrom);
|
|
}
|