mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
3539 lines
120 KiB
C++
3539 lines
120 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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// SPDX-License-Identifier: GPL-3.0
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/**
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* @author Christian <c@ethdev.com>
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* @date 2015
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* Type analyzer and checker.
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*/
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#include <libsolidity/analysis/TypeChecker.h>
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#include <libsolidity/ast/AST.h>
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#include <libsolidity/ast/ASTUtils.h>
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#include <libsolidity/ast/TypeProvider.h>
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#include <libyul/AsmAnalysis.h>
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#include <libyul/AsmAnalysisInfo.h>
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#include <libyul/AST.h>
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#include <liblangutil/ErrorReporter.h>
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#include <libsolutil/Algorithms.h>
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#include <libsolutil/StringUtils.h>
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#include <libsolutil/Views.h>
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#include <boost/algorithm/string/join.hpp>
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#include <boost/algorithm/string/predicate.hpp>
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#include <boost/range/adaptor/reversed.hpp>
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#include <range/v3/view/zip.hpp>
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#include <range/v3/view/drop_exactly.hpp>
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#include <range/v3/algorithm/count_if.hpp>
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#include <memory>
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#include <vector>
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using namespace std;
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using namespace solidity;
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using namespace solidity::util;
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using namespace solidity::langutil;
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using namespace solidity::frontend;
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bool TypeChecker::typeSupportedByOldABIEncoder(Type const& _type, bool _isLibraryCall)
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{
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if (_isLibraryCall && _type.dataStoredIn(DataLocation::Storage))
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return true;
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if (_type.category() == Type::Category::Struct)
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return false;
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if (_type.category() == Type::Category::Array)
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{
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auto const& arrayType = dynamic_cast<ArrayType const&>(_type);
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auto base = arrayType.baseType();
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if (!typeSupportedByOldABIEncoder(*base, _isLibraryCall) || (base->category() == Type::Category::Array && base->isDynamicallySized()))
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return false;
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}
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return true;
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}
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bool TypeChecker::checkTypeRequirements(SourceUnit const& _source)
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{
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m_currentSourceUnit = &_source;
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_source.accept(*this);
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m_currentSourceUnit = nullptr;
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return Error::containsOnlyWarnings(m_errorReporter.errors());
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}
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Type const* TypeChecker::type(Expression const& _expression) const
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{
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solAssert(!!_expression.annotation().type, "Type requested but not present.");
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return _expression.annotation().type;
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}
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Type const* TypeChecker::type(VariableDeclaration const& _variable) const
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{
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solAssert(!!_variable.annotation().type, "Type requested but not present.");
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return _variable.annotation().type;
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}
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bool TypeChecker::visit(ContractDefinition const& _contract)
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{
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m_currentContract = &_contract;
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ASTNode::listAccept(_contract.baseContracts(), *this);
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for (auto const& n: _contract.subNodes())
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n->accept(*this);
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m_currentContract = nullptr;
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return false;
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}
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void TypeChecker::checkDoubleStorageAssignment(Assignment const& _assignment)
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{
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TupleType const& lhs = dynamic_cast<TupleType const&>(*type(_assignment.leftHandSide()));
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TupleType const& rhs = dynamic_cast<TupleType const&>(*type(_assignment.rightHandSide()));
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if (lhs.components().size() != rhs.components().size())
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{
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solAssert(m_errorReporter.hasErrors(), "");
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return;
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}
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size_t storageToStorageCopies = 0;
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size_t toStorageCopies = 0;
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for (size_t i = 0; i < lhs.components().size(); ++i)
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{
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ReferenceType const* ref = dynamic_cast<ReferenceType const*>(lhs.components()[i]);
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if (!ref || !ref->dataStoredIn(DataLocation::Storage) || ref->isPointer())
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continue;
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toStorageCopies++;
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if (rhs.components()[i]->dataStoredIn(DataLocation::Storage))
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storageToStorageCopies++;
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}
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if (storageToStorageCopies >= 1 && toStorageCopies >= 2)
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m_errorReporter.warning(
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7238_error,
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_assignment.location(),
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"This assignment performs two copies to storage. Since storage copies do not first "
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"copy to a temporary location, one of them might be overwritten before the second "
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"is executed and thus may have unexpected effects. It is safer to perform the copies "
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"separately or assign to storage pointers first."
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);
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}
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TypePointers TypeChecker::typeCheckABIDecodeAndRetrieveReturnType(FunctionCall const& _functionCall, bool _abiEncoderV2)
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{
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vector<ASTPointer<Expression const>> arguments = _functionCall.arguments();
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if (arguments.size() != 2)
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m_errorReporter.typeError(
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5782_error,
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_functionCall.location(),
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"This function takes two arguments, but " +
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toString(arguments.size()) +
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" were provided."
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);
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if (arguments.size() >= 1)
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if (
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!type(*arguments.front())->isImplicitlyConvertibleTo(*TypeProvider::bytesMemory()) &&
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!type(*arguments.front())->isImplicitlyConvertibleTo(*TypeProvider::bytesCalldata())
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)
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m_errorReporter.typeError(
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1956_error,
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arguments.front()->location(),
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"The first argument to \"abi.decode\" must be implicitly convertible to "
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"bytes memory or bytes calldata, but is of type " +
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type(*arguments.front())->toString() +
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"."
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);
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if (arguments.size() < 2)
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return {};
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// The following is a rather syntactic restriction, but we check it here anyway:
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// The second argument has to be a tuple expression containing type names.
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TupleExpression const* tupleExpression = dynamic_cast<TupleExpression const*>(arguments[1].get());
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if (!tupleExpression)
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{
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m_errorReporter.typeError(
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6444_error,
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arguments[1]->location(),
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"The second argument to \"abi.decode\" has to be a tuple of types."
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);
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return {};
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}
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TypePointers components;
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for (auto const& typeArgument: tupleExpression->components())
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{
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solAssert(typeArgument, "");
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if (TypeType const* argTypeType = dynamic_cast<TypeType const*>(type(*typeArgument)))
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{
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Type const* actualType = argTypeType->actualType();
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solAssert(actualType, "");
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// We force memory because the parser currently cannot handle
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// data locations. Furthermore, storage can be a little dangerous and
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// calldata is not really implemented anyway.
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actualType = TypeProvider::withLocationIfReference(DataLocation::Memory, actualType);
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// We force address payable for address types.
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if (actualType->category() == Type::Category::Address)
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actualType = TypeProvider::payableAddress();
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solAssert(
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!actualType->dataStoredIn(DataLocation::CallData) &&
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!actualType->dataStoredIn(DataLocation::Storage),
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""
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);
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if (!actualType->fullEncodingType(false, _abiEncoderV2, false))
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m_errorReporter.typeError(
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9611_error,
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typeArgument->location(),
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"Decoding type " + actualType->toString(false) + " not supported."
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);
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if (auto referenceType = dynamic_cast<ReferenceType const*>(actualType))
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{
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auto result = referenceType->validForLocation(referenceType->location());
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if (!result)
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m_errorReporter.typeError(
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6118_error,
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typeArgument->location(),
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result.message()
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);
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}
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components.push_back(actualType);
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}
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else
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{
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m_errorReporter.typeError(1039_error, typeArgument->location(), "Argument has to be a type name.");
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components.push_back(TypeProvider::emptyTuple());
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}
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}
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return components;
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}
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TypePointers TypeChecker::typeCheckMetaTypeFunctionAndRetrieveReturnType(FunctionCall const& _functionCall)
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{
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vector<ASTPointer<Expression const>> arguments = _functionCall.arguments();
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if (arguments.size() != 1)
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m_errorReporter.fatalTypeError(
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8885_error,
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_functionCall.location(),
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"This function takes one argument, but " +
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toString(arguments.size()) +
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" were provided."
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);
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Type const* firstArgType = type(*arguments.front());
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bool wrongType = false;
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if (firstArgType->category() == Type::Category::TypeType)
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{
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TypeType const* typeTypePtr = dynamic_cast<TypeType const*>(firstArgType);
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Type::Category typeCategory = typeTypePtr->actualType()->category();
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if (auto const* contractType = dynamic_cast<ContractType const*>(typeTypePtr->actualType()))
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wrongType = contractType->isSuper();
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else if (typeCategory != Type::Category::Integer)
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wrongType = true;
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}
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else
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wrongType = true;
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if (wrongType)
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m_errorReporter.fatalTypeError(
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4259_error,
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arguments.front()->location(),
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"Invalid type for argument in the function call. "
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"A contract type or an integer type is required, but " +
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type(*arguments.front())->toString(true) + " provided."
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);
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return {TypeProvider::meta(dynamic_cast<TypeType const&>(*firstArgType).actualType())};
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}
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void TypeChecker::endVisit(InheritanceSpecifier const& _inheritance)
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{
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auto base = dynamic_cast<ContractDefinition const*>(&dereference(_inheritance.name()));
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solAssert(base, "Base contract not available.");
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solAssert(m_currentContract, "");
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if (m_currentContract->isInterface() && !base->isInterface())
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m_errorReporter.typeError(6536_error, _inheritance.location(), "Interfaces can only inherit from other interfaces.");
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auto const& arguments = _inheritance.arguments();
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TypePointers parameterTypes;
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if (!base->isInterface())
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// Interfaces do not have constructors, so there are zero parameters.
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parameterTypes = ContractType(*base).newExpressionType()->parameterTypes();
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if (arguments)
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{
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if (parameterTypes.size() != arguments->size())
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{
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m_errorReporter.typeError(
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7927_error,
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_inheritance.location(),
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"Wrong argument count for constructor call: " +
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toString(arguments->size()) +
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" arguments given but expected " +
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toString(parameterTypes.size()) +
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". Remove parentheses if you do not want to provide arguments here."
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);
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}
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for (size_t i = 0; i < std::min(arguments->size(), parameterTypes.size()); ++i)
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{
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BoolResult result = type(*(*arguments)[i])->isImplicitlyConvertibleTo(*parameterTypes[i]);
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if (!result)
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m_errorReporter.typeErrorConcatenateDescriptions(
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9827_error,
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(*arguments)[i]->location(),
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"Invalid type for argument in constructor call. "
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"Invalid implicit conversion from " +
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type(*(*arguments)[i])->toString() +
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" to " +
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parameterTypes[i]->toString() +
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" requested.",
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result.message()
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);
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}
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}
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}
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void TypeChecker::endVisit(ModifierDefinition const& _modifier)
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{
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if (_modifier.virtualSemantics())
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if (auto const* contractDef = dynamic_cast<ContractDefinition const*>(_modifier.scope()))
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if (contractDef->isLibrary())
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m_errorReporter.typeError(
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3275_error,
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_modifier.location(),
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"Modifiers in a library cannot be virtual."
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);
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if (!_modifier.isImplemented() && !_modifier.virtualSemantics())
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m_errorReporter.typeError(8063_error, _modifier.location(), "Modifiers without implementation must be marked virtual.");
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}
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bool TypeChecker::visit(FunctionDefinition const& _function)
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{
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if (_function.markedVirtual())
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{
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if (_function.isFree())
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m_errorReporter.syntaxError(4493_error, _function.location(), "Free functions cannot be virtual.");
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else if (_function.isConstructor())
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m_errorReporter.typeError(7001_error, _function.location(), "Constructors cannot be virtual.");
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else if (_function.annotation().contract->isInterface())
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m_errorReporter.warning(5815_error, _function.location(), "Interface functions are implicitly \"virtual\"");
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else if (_function.visibility() == Visibility::Private)
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m_errorReporter.typeError(3942_error, _function.location(), "\"virtual\" and \"private\" cannot be used together.");
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else if (_function.libraryFunction())
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m_errorReporter.typeError(7801_error, _function.location(), "Library functions cannot be \"virtual\".");
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}
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if (_function.overrides() && _function.isFree())
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m_errorReporter.syntaxError(1750_error, _function.location(), "Free functions cannot override.");
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if (!_function.modifiers().empty() && _function.isFree())
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m_errorReporter.syntaxError(5811_error, _function.location(), "Free functions cannot have modifiers.");
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if (_function.isPayable())
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{
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if (_function.libraryFunction())
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m_errorReporter.typeError(7708_error, _function.location(), "Library functions cannot be payable.");
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else if (_function.isFree())
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m_errorReporter.typeError(9559_error, _function.location(), "Free functions cannot be payable.");
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else if (_function.isOrdinary() && !_function.isPartOfExternalInterface())
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m_errorReporter.typeError(5587_error, _function.location(), "\"internal\" and \"private\" functions cannot be payable.");
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}
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vector<VariableDeclaration const*> internalParametersInConstructor;
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auto checkArgumentAndReturnParameter = [&](VariableDeclaration const& _var) {
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if (type(_var)->containsNestedMapping())
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if (_var.referenceLocation() == VariableDeclaration::Location::Storage)
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solAssert(
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_function.libraryFunction() || _function.isConstructor() || !_function.isPublic(),
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"Mapping types for parameters or return variables "
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"can only be used in internal or library functions."
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);
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bool functionIsExternallyVisible =
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(!_function.isConstructor() && _function.isPublic()) ||
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(_function.isConstructor() && !m_currentContract->abstract());
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if (
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_function.isConstructor() &&
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_var.referenceLocation() == VariableDeclaration::Location::Storage &&
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!m_currentContract->abstract()
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)
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m_errorReporter.typeError(
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3644_error,
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_var.location(),
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"This parameter has a type that can only be used internally. "
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"You can make the contract abstract to avoid this problem."
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);
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else if (functionIsExternallyVisible)
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{
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auto iType = type(_var)->interfaceType(_function.libraryFunction());
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if (!iType)
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{
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string message = iType.message();
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solAssert(!message.empty(), "Expected detailed error message!");
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if (_function.isConstructor())
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message += " You can make the contract abstract to avoid this problem.";
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m_errorReporter.typeError(4103_error, _var.location(), message);
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}
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else if (
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!useABICoderV2() &&
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!typeSupportedByOldABIEncoder(*type(_var), _function.libraryFunction())
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)
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{
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string message =
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"This type is only supported in ABI coder v2. "
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"Use \"pragma abicoder v2;\" to enable the feature.";
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if (_function.isConstructor())
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message +=
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" Alternatively, make the contract abstract and supply the "
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"constructor arguments from a derived contract.";
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m_errorReporter.typeError(
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4957_error,
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_var.location(),
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message
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);
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}
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}
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};
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for (ASTPointer<VariableDeclaration> const& var: _function.parameters())
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{
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checkArgumentAndReturnParameter(*var);
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var->accept(*this);
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}
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for (ASTPointer<VariableDeclaration> const& var: _function.returnParameters())
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{
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checkArgumentAndReturnParameter(*var);
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var->accept(*this);
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}
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set<Declaration const*> modifiers;
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for (ASTPointer<ModifierInvocation> const& modifier: _function.modifiers())
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{
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vector<ContractDefinition const*> baseContracts;
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if (auto contract = dynamic_cast<ContractDefinition const*>(_function.scope()))
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{
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baseContracts = contract->annotation().linearizedBaseContracts;
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// Delete first base which is just the main contract itself
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baseContracts.erase(baseContracts.begin());
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}
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visitManually(
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*modifier,
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_function.isConstructor() ? baseContracts : vector<ContractDefinition const*>()
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);
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|
Declaration const* decl = &dereference(modifier->name());
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if (modifiers.count(decl))
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{
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if (dynamic_cast<ContractDefinition const*>(decl))
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m_errorReporter.declarationError(1697_error, modifier->location(), "Base constructor already provided.");
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}
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else
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modifiers.insert(decl);
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}
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solAssert(_function.isFree() == !m_currentContract, "");
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if (!m_currentContract)
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{
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solAssert(!_function.isConstructor(), "");
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solAssert(!_function.isFallback(), "");
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solAssert(!_function.isReceive(), "");
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}
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else if (m_currentContract->isInterface())
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{
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if (_function.isImplemented())
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m_errorReporter.typeError(4726_error, _function.location(), "Functions in interfaces cannot have an implementation.");
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if (_function.isConstructor())
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m_errorReporter.typeError(6482_error, _function.location(), "Constructor cannot be defined in interfaces.");
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else if (_function.visibility() != Visibility::External)
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m_errorReporter.typeError(1560_error, _function.location(), "Functions in interfaces must be declared external.");
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}
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else if (m_currentContract->contractKind() == ContractKind::Library)
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if (_function.isConstructor())
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m_errorReporter.typeError(7634_error, _function.location(), "Constructor cannot be defined in libraries.");
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|
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if (_function.isImplemented())
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_function.body().accept(*this);
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else if (_function.isConstructor())
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m_errorReporter.typeError(5700_error, _function.location(), "Constructor must be implemented if declared.");
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else if (_function.libraryFunction())
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m_errorReporter.typeError(9231_error, _function.location(), "Library functions must be implemented if declared.");
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else if (!_function.virtualSemantics())
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{
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if (_function.isFree())
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solAssert(m_errorReporter.hasErrors(), "");
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else
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m_errorReporter.typeError(5424_error, _function.location(), "Functions without implementation must be marked virtual.");
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}
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if (_function.isFallback())
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typeCheckFallbackFunction(_function);
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else if (_function.isReceive())
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typeCheckReceiveFunction(_function);
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else if (_function.isConstructor())
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typeCheckConstructor(_function);
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return false;
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}
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|
|
bool TypeChecker::visit(VariableDeclaration const& _variable)
|
|
{
|
|
_variable.typeName().accept(*this);
|
|
|
|
// type is filled either by ReferencesResolver directly from the type name or by
|
|
// TypeChecker at the VariableDeclarationStatement level.
|
|
Type const* varType = _variable.annotation().type;
|
|
solAssert(!!varType, "Variable type not provided.");
|
|
|
|
if (_variable.value())
|
|
{
|
|
if (_variable.isStateVariable() && varType->containsNestedMapping())
|
|
{
|
|
m_errorReporter.typeError(
|
|
6280_error,
|
|
_variable.location(),
|
|
"Types in storage containing (nested) mappings cannot be assigned to."
|
|
);
|
|
_variable.value()->accept(*this);
|
|
}
|
|
else
|
|
expectType(*_variable.value(), *varType);
|
|
}
|
|
if (_variable.isConstant())
|
|
{
|
|
if (!_variable.value())
|
|
m_errorReporter.typeError(4266_error, _variable.location(), "Uninitialized \"constant\" variable.");
|
|
else if (!*_variable.value()->annotation().isPure)
|
|
m_errorReporter.typeError(
|
|
8349_error,
|
|
_variable.value()->location(),
|
|
"Initial value for constant variable has to be compile-time constant."
|
|
);
|
|
}
|
|
else if (_variable.immutable())
|
|
{
|
|
if (!_variable.type()->isValueType())
|
|
m_errorReporter.typeError(6377_error, _variable.location(), "Immutable variables cannot have a non-value type.");
|
|
if (
|
|
auto const* functionType = dynamic_cast<FunctionType const*>(_variable.type());
|
|
functionType && functionType->kind() == FunctionType::Kind::External
|
|
)
|
|
m_errorReporter.typeError(3366_error, _variable.location(), "Immutable variables of external function type are not yet supported.");
|
|
solAssert(_variable.type()->sizeOnStack() == 1 || m_errorReporter.hasErrors(), "");
|
|
}
|
|
|
|
if (!_variable.isStateVariable())
|
|
{
|
|
if (
|
|
_variable.referenceLocation() == VariableDeclaration::Location::CallData ||
|
|
_variable.referenceLocation() == VariableDeclaration::Location::Memory
|
|
)
|
|
if (varType->containsNestedMapping())
|
|
m_errorReporter.fatalTypeError(
|
|
4061_error,
|
|
_variable.location(),
|
|
"Type " + varType->toString(true) + " is only valid in storage because it contains a (nested) mapping."
|
|
);
|
|
}
|
|
else if (_variable.visibility() >= Visibility::Public)
|
|
{
|
|
FunctionType getter(_variable);
|
|
if (!useABICoderV2())
|
|
{
|
|
vector<string> unsupportedTypes;
|
|
for (auto const& param: getter.parameterTypes() + getter.returnParameterTypes())
|
|
if (!typeSupportedByOldABIEncoder(*param, false /* isLibrary */))
|
|
unsupportedTypes.emplace_back(param->toString());
|
|
if (!unsupportedTypes.empty())
|
|
m_errorReporter.typeError(
|
|
2763_error,
|
|
_variable.location(),
|
|
"The following types are only supported for getters in ABI coder v2: " +
|
|
joinHumanReadable(unsupportedTypes) +
|
|
". Either remove \"public\" or use \"pragma abicoder v2;\" to enable the feature."
|
|
);
|
|
}
|
|
if (!getter.interfaceFunctionType())
|
|
m_errorReporter.typeError(6744_error, _variable.location(), "Internal or recursive type is not allowed for public state variables.");
|
|
}
|
|
|
|
bool isStructMemberDeclaration = dynamic_cast<StructDefinition const*>(_variable.scope()) != nullptr;
|
|
if (isStructMemberDeclaration)
|
|
return false;
|
|
|
|
if (auto referenceType = dynamic_cast<ReferenceType const*>(varType))
|
|
{
|
|
BoolResult result = referenceType->validForLocation(referenceType->location());
|
|
if (result)
|
|
{
|
|
bool isLibraryStorageParameter = (_variable.isLibraryFunctionParameter() && referenceType->location() == DataLocation::Storage);
|
|
bool callDataCheckRequired = ((_variable.isConstructorParameter() || _variable.isPublicCallableParameter()) && !isLibraryStorageParameter);
|
|
if (callDataCheckRequired)
|
|
{
|
|
if (!referenceType->interfaceType(false))
|
|
solAssert(m_errorReporter.hasErrors(), "");
|
|
else
|
|
result = referenceType->validForLocation(DataLocation::CallData);
|
|
}
|
|
}
|
|
if (!result)
|
|
{
|
|
solAssert(!result.message().empty(), "Expected detailed error message");
|
|
m_errorReporter.typeError(1534_error, _variable.location(), result.message());
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
void TypeChecker::visitManually(
|
|
ModifierInvocation const& _modifier,
|
|
vector<ContractDefinition const*> const& _bases
|
|
)
|
|
{
|
|
std::vector<ASTPointer<Expression>> const& arguments =
|
|
_modifier.arguments() ? *_modifier.arguments() : std::vector<ASTPointer<Expression>>();
|
|
for (ASTPointer<Expression> const& argument: arguments)
|
|
argument->accept(*this);
|
|
|
|
_modifier.name().accept(*this);
|
|
|
|
auto const* declaration = &dereference(_modifier.name());
|
|
vector<ASTPointer<VariableDeclaration>> emptyParameterList;
|
|
vector<ASTPointer<VariableDeclaration>> const* parameters = nullptr;
|
|
if (auto modifierDecl = dynamic_cast<ModifierDefinition const*>(declaration))
|
|
{
|
|
parameters = &modifierDecl->parameters();
|
|
if (auto const* modifierContract = dynamic_cast<ContractDefinition const*>(modifierDecl->scope()))
|
|
if (m_currentContract)
|
|
{
|
|
if (!contains(m_currentContract->annotation().linearizedBaseContracts, modifierContract))
|
|
m_errorReporter.typeError(
|
|
9428_error,
|
|
_modifier.location(),
|
|
"Can only use modifiers defined in the current contract or in base contracts."
|
|
);
|
|
}
|
|
}
|
|
else
|
|
// check parameters for Base constructors
|
|
for (ContractDefinition const* base: _bases)
|
|
if (declaration == base)
|
|
{
|
|
if (auto referencedConstructor = base->constructor())
|
|
parameters = &referencedConstructor->parameters();
|
|
else
|
|
parameters = &emptyParameterList;
|
|
break;
|
|
}
|
|
if (!parameters)
|
|
{
|
|
m_errorReporter.typeError(4659_error, _modifier.location(), "Referenced declaration is neither modifier nor base class.");
|
|
return;
|
|
}
|
|
if (parameters->size() != arguments.size())
|
|
{
|
|
m_errorReporter.typeError(
|
|
2973_error,
|
|
_modifier.location(),
|
|
"Wrong argument count for modifier invocation: " +
|
|
toString(arguments.size()) +
|
|
" arguments given but expected " +
|
|
toString(parameters->size()) +
|
|
"."
|
|
);
|
|
return;
|
|
}
|
|
for (size_t i = 0; i < arguments.size(); ++i)
|
|
{
|
|
BoolResult result = type(*arguments[i])->isImplicitlyConvertibleTo(*type(*(*parameters)[i]));
|
|
if (!result)
|
|
m_errorReporter.typeErrorConcatenateDescriptions(
|
|
4649_error,
|
|
arguments[i]->location(),
|
|
"Invalid type for argument in modifier invocation. "
|
|
"Invalid implicit conversion from " +
|
|
type(*arguments[i])->toString() +
|
|
" to " +
|
|
type(*(*parameters)[i])->toString() +
|
|
" requested.",
|
|
result.message()
|
|
);
|
|
}
|
|
}
|
|
|
|
bool TypeChecker::visit(EventDefinition const& _eventDef)
|
|
{
|
|
solAssert(_eventDef.visibility() > Visibility::Internal, "");
|
|
checkErrorAndEventParameters(_eventDef);
|
|
|
|
auto numIndexed = ranges::count_if(
|
|
_eventDef.parameters(),
|
|
[](ASTPointer<VariableDeclaration> const& var) { return var->isIndexed(); }
|
|
);
|
|
if (_eventDef.isAnonymous() && numIndexed > 4)
|
|
m_errorReporter.typeError(8598_error, _eventDef.location(), "More than 4 indexed arguments for anonymous event.");
|
|
else if (!_eventDef.isAnonymous() && numIndexed > 3)
|
|
m_errorReporter.typeError(7249_error, _eventDef.location(), "More than 3 indexed arguments for event.");
|
|
return true;
|
|
}
|
|
|
|
bool TypeChecker::visit(ErrorDefinition const& _errorDef)
|
|
{
|
|
solAssert(_errorDef.visibility() > Visibility::Internal, "");
|
|
checkErrorAndEventParameters(_errorDef);
|
|
return true;
|
|
}
|
|
|
|
void TypeChecker::endVisit(FunctionTypeName const& _funType)
|
|
{
|
|
FunctionType const& fun = dynamic_cast<FunctionType const&>(*_funType.annotation().type);
|
|
if (fun.kind() == FunctionType::Kind::External)
|
|
{
|
|
for (auto const& t: _funType.parameterTypes() + _funType.returnParameterTypes())
|
|
{
|
|
solAssert(t->annotation().type, "Type not set for parameter.");
|
|
if (!t->annotation().type->interfaceType(false).get())
|
|
m_errorReporter.typeError(2582_error, t->location(), "Internal type cannot be used for external function type.");
|
|
}
|
|
solAssert(fun.interfaceType(false), "External function type uses internal types.");
|
|
}
|
|
}
|
|
|
|
bool TypeChecker::visit(InlineAssembly const& _inlineAssembly)
|
|
{
|
|
// External references have already been resolved in a prior stage and stored in the annotation.
|
|
// We run the resolve step again regardless.
|
|
yul::ExternalIdentifierAccess::Resolver identifierAccess = [&](
|
|
yul::Identifier const& _identifier,
|
|
yul::IdentifierContext _context,
|
|
bool
|
|
)
|
|
{
|
|
auto ref = _inlineAssembly.annotation().externalReferences.find(&_identifier);
|
|
if (ref == _inlineAssembly.annotation().externalReferences.end())
|
|
return false;
|
|
InlineAssemblyAnnotation::ExternalIdentifierInfo& identifierInfo = ref->second;
|
|
Declaration const* declaration = identifierInfo.declaration;
|
|
solAssert(!!declaration, "");
|
|
if (auto var = dynamic_cast<VariableDeclaration const*>(declaration))
|
|
{
|
|
solAssert(var->type(), "Expected variable type!");
|
|
if (var->immutable())
|
|
{
|
|
m_errorReporter.typeError(3773_error, _identifier.debugData->location, "Assembly access to immutable variables is not supported.");
|
|
return false;
|
|
}
|
|
if (var->isConstant())
|
|
{
|
|
if (isConstantVariableRecursive(*var))
|
|
{
|
|
m_errorReporter.typeError(
|
|
3558_error,
|
|
_identifier.debugData->location,
|
|
"Constant variable is circular."
|
|
);
|
|
return false;
|
|
}
|
|
|
|
var = rootConstVariableDeclaration(*var);
|
|
|
|
if (var && !var->value())
|
|
{
|
|
m_errorReporter.typeError(3224_error, _identifier.debugData->location, "Constant has no value.");
|
|
return false;
|
|
}
|
|
else if (_context == yul::IdentifierContext::LValue)
|
|
{
|
|
m_errorReporter.typeError(6252_error, _identifier.debugData->location, "Constant variables cannot be assigned to.");
|
|
return false;
|
|
}
|
|
else if (!identifierInfo.suffix.empty())
|
|
{
|
|
m_errorReporter.typeError(6617_error, _identifier.debugData->location, "The suffixes .offset and .slot can only be used on non-constant storage variables.");
|
|
return false;
|
|
}
|
|
else if (var && var->value() && !var->value()->annotation().type && !dynamic_cast<Literal const*>(var->value().get()))
|
|
{
|
|
m_errorReporter.typeError(
|
|
2249_error,
|
|
_identifier.debugData->location,
|
|
"Constant variables with non-literal values cannot be forward referenced from inline assembly."
|
|
);
|
|
return false;
|
|
}
|
|
else if (!var || !type(*var)->isValueType() || (
|
|
!dynamic_cast<Literal const*>(var->value().get()) &&
|
|
type(*var->value())->category() != Type::Category::RationalNumber
|
|
))
|
|
{
|
|
m_errorReporter.typeError(7615_error, _identifier.debugData->location, "Only direct number constants and references to such constants are supported by inline assembly.");
|
|
return false;
|
|
}
|
|
}
|
|
|
|
solAssert(!dynamic_cast<FixedPointType const*>(var->type()), "FixedPointType not implemented.");
|
|
|
|
if (!identifierInfo.suffix.empty())
|
|
{
|
|
string const& suffix = identifierInfo.suffix;
|
|
solAssert((set<string>{"offset", "slot", "length"}).count(suffix), "");
|
|
if (var->isStateVariable() || var->type()->dataStoredIn(DataLocation::Storage))
|
|
{
|
|
if (suffix != "slot" && suffix != "offset")
|
|
{
|
|
m_errorReporter.typeError(4656_error, _identifier.debugData->location, "State variables only support \".slot\" and \".offset\".");
|
|
return false;
|
|
}
|
|
else if (_context == yul::IdentifierContext::LValue)
|
|
{
|
|
if (var->isStateVariable())
|
|
{
|
|
m_errorReporter.typeError(4713_error, _identifier.debugData->location, "State variables cannot be assigned to - you have to use \"sstore()\".");
|
|
return false;
|
|
}
|
|
else if (suffix != "slot")
|
|
{
|
|
m_errorReporter.typeError(9739_error, _identifier.debugData->location, "Only .slot can be assigned to.");
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
else if (
|
|
auto const* arrayType = dynamic_cast<ArrayType const*>(var->type());
|
|
arrayType && arrayType->isDynamicallySized() && arrayType->dataStoredIn(DataLocation::CallData)
|
|
)
|
|
{
|
|
if (suffix != "offset" && suffix != "length")
|
|
{
|
|
m_errorReporter.typeError(1536_error, _identifier.debugData->location, "Calldata variables only support \".offset\" and \".length\".");
|
|
return false;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
m_errorReporter.typeError(3622_error, _identifier.debugData->location, "The suffix \"." + suffix + "\" is not supported by this variable or type.");
|
|
return false;
|
|
}
|
|
}
|
|
else if (!var->isConstant() && var->isStateVariable())
|
|
{
|
|
m_errorReporter.typeError(
|
|
1408_error,
|
|
_identifier.debugData->location,
|
|
"Only local variables are supported. To access storage variables, use the \".slot\" and \".offset\" suffixes."
|
|
);
|
|
return false;
|
|
}
|
|
else if (var->type()->dataStoredIn(DataLocation::Storage))
|
|
{
|
|
m_errorReporter.typeError(9068_error, _identifier.debugData->location, "You have to use the \".slot\" or \".offset\" suffix to access storage reference variables.");
|
|
return false;
|
|
}
|
|
else if (var->type()->sizeOnStack() != 1)
|
|
{
|
|
if (
|
|
auto const* arrayType = dynamic_cast<ArrayType const*>(var->type());
|
|
arrayType && arrayType->isDynamicallySized() && arrayType->dataStoredIn(DataLocation::CallData)
|
|
)
|
|
m_errorReporter.typeError(1397_error, _identifier.debugData->location, "Call data elements cannot be accessed directly. Use \".offset\" and \".length\" to access the calldata offset and length of this array and then use \"calldatacopy\".");
|
|
else
|
|
{
|
|
solAssert(!var->type()->dataStoredIn(DataLocation::CallData), "");
|
|
m_errorReporter.typeError(9857_error, _identifier.debugData->location, "Only types that use one stack slot are supported.");
|
|
}
|
|
return false;
|
|
}
|
|
}
|
|
else if (!identifierInfo.suffix.empty())
|
|
{
|
|
m_errorReporter.typeError(7944_error, _identifier.debugData->location, "The suffixes \".offset\", \".slot\" and \".length\" can only be used with variables.");
|
|
return false;
|
|
}
|
|
else if (_context == yul::IdentifierContext::LValue)
|
|
{
|
|
if (dynamic_cast<MagicVariableDeclaration const*>(declaration))
|
|
return false;
|
|
|
|
m_errorReporter.typeError(1990_error, _identifier.debugData->location, "Only local variables can be assigned to in inline assembly.");
|
|
return false;
|
|
}
|
|
|
|
if (_context == yul::IdentifierContext::RValue)
|
|
{
|
|
solAssert(!!declaration->type(), "Type of declaration required but not yet determined.");
|
|
if (dynamic_cast<FunctionDefinition const*>(declaration))
|
|
{
|
|
m_errorReporter.declarationError(2025_error, _identifier.debugData->location, "Access to functions is not allowed in inline assembly.");
|
|
return false;
|
|
}
|
|
else if (dynamic_cast<VariableDeclaration const*>(declaration))
|
|
{
|
|
}
|
|
else if (auto contract = dynamic_cast<ContractDefinition const*>(declaration))
|
|
{
|
|
if (!contract->isLibrary())
|
|
{
|
|
m_errorReporter.typeError(4977_error, _identifier.debugData->location, "Expected a library.");
|
|
return false;
|
|
}
|
|
}
|
|
else
|
|
return false;
|
|
}
|
|
identifierInfo.valueSize = 1;
|
|
return true;
|
|
};
|
|
solAssert(!_inlineAssembly.annotation().analysisInfo, "");
|
|
_inlineAssembly.annotation().analysisInfo = make_shared<yul::AsmAnalysisInfo>();
|
|
yul::AsmAnalyzer analyzer(
|
|
*_inlineAssembly.annotation().analysisInfo,
|
|
m_errorReporter,
|
|
_inlineAssembly.dialect(),
|
|
identifierAccess
|
|
);
|
|
if (!analyzer.analyze(_inlineAssembly.operations()))
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
bool TypeChecker::visit(IfStatement const& _ifStatement)
|
|
{
|
|
expectType(_ifStatement.condition(), *TypeProvider::boolean());
|
|
_ifStatement.trueStatement().accept(*this);
|
|
if (_ifStatement.falseStatement())
|
|
_ifStatement.falseStatement()->accept(*this);
|
|
return false;
|
|
}
|
|
|
|
void TypeChecker::endVisit(TryStatement const& _tryStatement)
|
|
{
|
|
FunctionCall const* externalCall = dynamic_cast<FunctionCall const*>(&_tryStatement.externalCall());
|
|
if (!externalCall || *externalCall->annotation().kind != FunctionCallKind::FunctionCall)
|
|
{
|
|
m_errorReporter.typeError(
|
|
5347_error,
|
|
_tryStatement.externalCall().location(),
|
|
"Try can only be used with external function calls and contract creation calls."
|
|
);
|
|
return;
|
|
}
|
|
|
|
FunctionType const& functionType = dynamic_cast<FunctionType const&>(*externalCall->expression().annotation().type);
|
|
if (
|
|
functionType.kind() != FunctionType::Kind::External &&
|
|
functionType.kind() != FunctionType::Kind::Creation &&
|
|
functionType.kind() != FunctionType::Kind::DelegateCall
|
|
)
|
|
{
|
|
m_errorReporter.typeError(
|
|
2536_error,
|
|
_tryStatement.externalCall().location(),
|
|
"Try can only be used with external function calls and contract creation calls."
|
|
);
|
|
return;
|
|
}
|
|
|
|
externalCall->annotation().tryCall = true;
|
|
|
|
solAssert(_tryStatement.clauses().size() >= 2, "");
|
|
solAssert(_tryStatement.clauses().front(), "");
|
|
|
|
TryCatchClause const& successClause = *_tryStatement.clauses().front();
|
|
if (successClause.parameters())
|
|
{
|
|
TypePointers returnTypes =
|
|
m_evmVersion.supportsReturndata() ?
|
|
functionType.returnParameterTypes() :
|
|
functionType.returnParameterTypesWithoutDynamicTypes();
|
|
std::vector<ASTPointer<VariableDeclaration>> const& parameters =
|
|
successClause.parameters()->parameters();
|
|
if (returnTypes.size() != parameters.size())
|
|
m_errorReporter.typeError(
|
|
2800_error,
|
|
successClause.location(),
|
|
"Function returns " +
|
|
to_string(functionType.returnParameterTypes().size()) +
|
|
" values, but returns clause has " +
|
|
to_string(parameters.size()) +
|
|
" variables."
|
|
);
|
|
for (auto&& [parameter, returnType]: ranges::views::zip(parameters, returnTypes))
|
|
{
|
|
solAssert(returnType, "");
|
|
if (parameter && *parameter->annotation().type != *returnType)
|
|
m_errorReporter.typeError(
|
|
6509_error,
|
|
parameter->location(),
|
|
"Invalid type, expected " +
|
|
returnType->toString(false) +
|
|
" but got " +
|
|
parameter->annotation().type->toString() +
|
|
"."
|
|
);
|
|
}
|
|
}
|
|
|
|
TryCatchClause const* panicClause = nullptr;
|
|
TryCatchClause const* errorClause = nullptr;
|
|
TryCatchClause const* lowLevelClause = nullptr;
|
|
for (auto const& clause: _tryStatement.clauses() | ranges::views::drop_exactly(1) | views::dereferenceChecked)
|
|
{
|
|
if (clause.errorName() == "")
|
|
{
|
|
if (lowLevelClause)
|
|
m_errorReporter.typeError(
|
|
5320_error,
|
|
clause.location(),
|
|
SecondarySourceLocation{}.append("The first clause is here:", lowLevelClause->location()),
|
|
"This try statement already has a low-level catch clause."
|
|
);
|
|
lowLevelClause = &clause;
|
|
if (clause.parameters() && !clause.parameters()->parameters().empty())
|
|
{
|
|
if (
|
|
clause.parameters()->parameters().size() != 1 ||
|
|
*clause.parameters()->parameters().front()->type() != *TypeProvider::bytesMemory()
|
|
)
|
|
m_errorReporter.typeError(6231_error, clause.location(), "Expected `catch (bytes memory ...) { ... }` or `catch { ... }`.");
|
|
if (!m_evmVersion.supportsReturndata())
|
|
m_errorReporter.typeError(
|
|
9908_error,
|
|
clause.location(),
|
|
"This catch clause type cannot be used on the selected EVM version (" +
|
|
m_evmVersion.name() +
|
|
"). You need at least a Byzantium-compatible EVM or use `catch { ... }`."
|
|
);
|
|
}
|
|
}
|
|
else if (clause.errorName() == "Error" || clause.errorName() == "Panic")
|
|
{
|
|
if (!m_evmVersion.supportsReturndata())
|
|
m_errorReporter.typeError(
|
|
1812_error,
|
|
clause.location(),
|
|
"This catch clause type cannot be used on the selected EVM version (" +
|
|
m_evmVersion.name() +
|
|
"). You need at least a Byzantium-compatible EVM or use `catch { ... }`."
|
|
);
|
|
|
|
if (clause.errorName() == "Error")
|
|
{
|
|
if (errorClause)
|
|
m_errorReporter.typeError(
|
|
1036_error,
|
|
clause.location(),
|
|
SecondarySourceLocation{}.append("The first clause is here:", errorClause->location()),
|
|
"This try statement already has an \"Error\" catch clause."
|
|
);
|
|
errorClause = &clause;
|
|
if (
|
|
!clause.parameters() ||
|
|
clause.parameters()->parameters().size() != 1 ||
|
|
*clause.parameters()->parameters().front()->type() != *TypeProvider::stringMemory()
|
|
)
|
|
m_errorReporter.typeError(2943_error, clause.location(), "Expected `catch Error(string memory ...) { ... }`.");
|
|
}
|
|
else
|
|
{
|
|
if (panicClause)
|
|
m_errorReporter.typeError(
|
|
6732_error,
|
|
clause.location(),
|
|
SecondarySourceLocation{}.append("The first clause is here:", panicClause->location()),
|
|
"This try statement already has a \"Panic\" catch clause."
|
|
);
|
|
panicClause = &clause;
|
|
if (
|
|
!clause.parameters() ||
|
|
clause.parameters()->parameters().size() != 1 ||
|
|
*clause.parameters()->parameters().front()->type() != *TypeProvider::uint256()
|
|
)
|
|
m_errorReporter.typeError(1271_error, clause.location(), "Expected `catch Panic(uint ...) { ... }`.");
|
|
}
|
|
}
|
|
else
|
|
m_errorReporter.typeError(
|
|
3542_error,
|
|
clause.location(),
|
|
"Invalid catch clause name. Expected either `catch (...)`, `catch Error(...)`, or `catch Panic(...)`."
|
|
);
|
|
}
|
|
}
|
|
|
|
bool TypeChecker::visit(WhileStatement const& _whileStatement)
|
|
{
|
|
expectType(_whileStatement.condition(), *TypeProvider::boolean());
|
|
_whileStatement.body().accept(*this);
|
|
return false;
|
|
}
|
|
|
|
bool TypeChecker::visit(ForStatement const& _forStatement)
|
|
{
|
|
if (_forStatement.initializationExpression())
|
|
_forStatement.initializationExpression()->accept(*this);
|
|
if (_forStatement.condition())
|
|
expectType(*_forStatement.condition(), *TypeProvider::boolean());
|
|
if (_forStatement.loopExpression())
|
|
_forStatement.loopExpression()->accept(*this);
|
|
_forStatement.body().accept(*this);
|
|
return false;
|
|
}
|
|
|
|
void TypeChecker::endVisit(Return const& _return)
|
|
{
|
|
ParameterList const* params = _return.annotation().functionReturnParameters;
|
|
if (!_return.expression())
|
|
{
|
|
if (params && !params->parameters().empty())
|
|
m_errorReporter.typeError(6777_error, _return.location(), "Return arguments required.");
|
|
return;
|
|
}
|
|
if (!params)
|
|
{
|
|
m_errorReporter.typeError(7552_error, _return.location(), "Return arguments not allowed.");
|
|
return;
|
|
}
|
|
TypePointers returnTypes;
|
|
for (auto const& var: params->parameters())
|
|
returnTypes.push_back(type(*var));
|
|
if (auto tupleType = dynamic_cast<TupleType const*>(type(*_return.expression())))
|
|
{
|
|
if (tupleType->components().size() != params->parameters().size())
|
|
m_errorReporter.typeError(5132_error, _return.location(), "Different number of arguments in return statement than in returns declaration.");
|
|
else
|
|
{
|
|
BoolResult result = tupleType->isImplicitlyConvertibleTo(TupleType(returnTypes));
|
|
if (!result)
|
|
m_errorReporter.typeErrorConcatenateDescriptions(
|
|
5992_error,
|
|
_return.expression()->location(),
|
|
"Return argument type " +
|
|
type(*_return.expression())->toString() +
|
|
" is not implicitly convertible to expected type " +
|
|
TupleType(returnTypes).toString(false) + ".",
|
|
result.message()
|
|
);
|
|
}
|
|
}
|
|
else if (params->parameters().size() != 1)
|
|
m_errorReporter.typeError(8863_error, _return.location(), "Different number of arguments in return statement than in returns declaration.");
|
|
else
|
|
{
|
|
Type const* expected = type(*params->parameters().front());
|
|
BoolResult result = type(*_return.expression())->isImplicitlyConvertibleTo(*expected);
|
|
if (!result)
|
|
m_errorReporter.typeErrorConcatenateDescriptions(
|
|
6359_error,
|
|
_return.expression()->location(),
|
|
"Return argument type " +
|
|
type(*_return.expression())->toString() +
|
|
" is not implicitly convertible to expected type (type of first return variable) " +
|
|
expected->toString() + ".",
|
|
result.message()
|
|
);
|
|
}
|
|
}
|
|
|
|
void TypeChecker::endVisit(EmitStatement const& _emit)
|
|
{
|
|
if (
|
|
*_emit.eventCall().annotation().kind != FunctionCallKind::FunctionCall ||
|
|
type(_emit.eventCall().expression())->category() != Type::Category::Function ||
|
|
dynamic_cast<FunctionType const&>(*type(_emit.eventCall().expression())).kind() != FunctionType::Kind::Event
|
|
)
|
|
m_errorReporter.typeError(9292_error, _emit.eventCall().expression().location(), "Expression has to be an event invocation.");
|
|
}
|
|
|
|
void TypeChecker::endVisit(RevertStatement const& _revert)
|
|
{
|
|
FunctionCall const& errorCall = _revert.errorCall();
|
|
if (
|
|
*errorCall.annotation().kind != FunctionCallKind::FunctionCall ||
|
|
type(errorCall.expression())->category() != Type::Category::Function ||
|
|
dynamic_cast<FunctionType const&>(*type(errorCall.expression())).kind() != FunctionType::Kind::Error
|
|
)
|
|
m_errorReporter.typeError(1885_error, errorCall.expression().location(), "Expression has to be an error.");
|
|
}
|
|
|
|
|
|
bool TypeChecker::visit(VariableDeclarationStatement const& _statement)
|
|
{
|
|
if (!_statement.initialValue())
|
|
{
|
|
// No initial value is only permitted for single variables with specified type.
|
|
// This usually already results in a parser error.
|
|
if (_statement.declarations().size() != 1 || !_statement.declarations().front())
|
|
{
|
|
solAssert(m_errorReporter.hasErrors(), "");
|
|
|
|
// It is okay to return here, as there are no named components on the
|
|
// left-hand-side that could cause any damage later.
|
|
return false;
|
|
}
|
|
|
|
VariableDeclaration const& varDecl = *_statement.declarations().front();
|
|
solAssert(varDecl.annotation().type, "");
|
|
|
|
if (dynamic_cast<MappingType const*>(type(varDecl)))
|
|
m_errorReporter.typeError(
|
|
4182_error,
|
|
varDecl.location(),
|
|
"Uninitialized mapping. Mappings cannot be created dynamically, you have to assign them from a state variable."
|
|
);
|
|
varDecl.accept(*this);
|
|
return false;
|
|
}
|
|
|
|
// Here we have an initial value and might have to derive some types before we can visit
|
|
// the variable declaration(s).
|
|
|
|
_statement.initialValue()->accept(*this);
|
|
TypePointers valueTypes;
|
|
if (auto tupleType = dynamic_cast<TupleType const*>(type(*_statement.initialValue())))
|
|
valueTypes = tupleType->components();
|
|
else
|
|
valueTypes = TypePointers{type(*_statement.initialValue())};
|
|
|
|
vector<ASTPointer<VariableDeclaration>> const& variables = _statement.declarations();
|
|
if (variables.empty())
|
|
// We already have an error for this in the SyntaxChecker.
|
|
solAssert(m_errorReporter.hasErrors(), "");
|
|
else if (valueTypes.size() != variables.size())
|
|
m_errorReporter.typeError(
|
|
7364_error,
|
|
_statement.location(),
|
|
"Different number of components on the left hand side (" +
|
|
toString(variables.size()) +
|
|
") than on the right hand side (" +
|
|
toString(valueTypes.size()) +
|
|
")."
|
|
);
|
|
|
|
for (size_t i = 0; i < min(variables.size(), valueTypes.size()); ++i)
|
|
{
|
|
if (!variables[i])
|
|
continue;
|
|
VariableDeclaration const& var = *variables[i];
|
|
solAssert(!var.value(), "Value has to be tied to statement.");
|
|
Type const* valueComponentType = valueTypes[i];
|
|
solAssert(!!valueComponentType, "");
|
|
solAssert(var.annotation().type, "");
|
|
|
|
var.accept(*this);
|
|
BoolResult result = valueComponentType->isImplicitlyConvertibleTo(*var.annotation().type);
|
|
if (!result)
|
|
{
|
|
auto errorMsg = "Type " +
|
|
valueComponentType->toString() +
|
|
" is not implicitly convertible to expected type " +
|
|
var.annotation().type->toString();
|
|
if (
|
|
valueComponentType->category() == Type::Category::RationalNumber &&
|
|
dynamic_cast<RationalNumberType const&>(*valueComponentType).isFractional() &&
|
|
valueComponentType->mobileType()
|
|
)
|
|
{
|
|
if (var.annotation().type->operator==(*valueComponentType->mobileType()))
|
|
m_errorReporter.typeError(
|
|
5107_error,
|
|
_statement.location(),
|
|
errorMsg + ", but it can be explicitly converted."
|
|
);
|
|
else
|
|
m_errorReporter.typeError(
|
|
4486_error,
|
|
_statement.location(),
|
|
errorMsg +
|
|
". Try converting to type " +
|
|
valueComponentType->mobileType()->toString() +
|
|
" or use an explicit conversion."
|
|
);
|
|
}
|
|
else
|
|
m_errorReporter.typeErrorConcatenateDescriptions(
|
|
9574_error,
|
|
_statement.location(),
|
|
errorMsg + ".",
|
|
result.message()
|
|
);
|
|
}
|
|
}
|
|
|
|
if (valueTypes.size() != variables.size())
|
|
{
|
|
solAssert(m_errorReporter.hasErrors(), "Should have errors!");
|
|
for (auto const& var: variables)
|
|
if (var && !var->annotation().type)
|
|
BOOST_THROW_EXCEPTION(FatalError());
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
void TypeChecker::endVisit(ExpressionStatement const& _statement)
|
|
{
|
|
if (type(_statement.expression())->category() == Type::Category::RationalNumber)
|
|
if (!dynamic_cast<RationalNumberType const&>(*type(_statement.expression())).mobileType())
|
|
m_errorReporter.typeError(3757_error, _statement.expression().location(), "Invalid rational number.");
|
|
|
|
if (auto call = dynamic_cast<FunctionCall const*>(&_statement.expression()))
|
|
{
|
|
if (auto callType = dynamic_cast<FunctionType const*>(type(call->expression())))
|
|
{
|
|
auto kind = callType->kind();
|
|
if (
|
|
kind == FunctionType::Kind::BareCall ||
|
|
kind == FunctionType::Kind::BareCallCode ||
|
|
kind == FunctionType::Kind::BareDelegateCall ||
|
|
kind == FunctionType::Kind::BareStaticCall
|
|
)
|
|
m_errorReporter.warning(9302_error, _statement.location(), "Return value of low-level calls not used.");
|
|
else if (kind == FunctionType::Kind::Send)
|
|
m_errorReporter.warning(5878_error, _statement.location(), "Failure condition of 'send' ignored. Consider using 'transfer' instead.");
|
|
}
|
|
}
|
|
}
|
|
|
|
bool TypeChecker::visit(Conditional const& _conditional)
|
|
{
|
|
expectType(_conditional.condition(), *TypeProvider::boolean());
|
|
|
|
_conditional.trueExpression().accept(*this);
|
|
_conditional.falseExpression().accept(*this);
|
|
|
|
Type const* trueType = type(_conditional.trueExpression())->mobileType();
|
|
Type const* falseType = type(_conditional.falseExpression())->mobileType();
|
|
|
|
Type const* commonType = nullptr;
|
|
|
|
if (!trueType)
|
|
m_errorReporter.typeError(9717_error, _conditional.trueExpression().location(), "Invalid mobile type in true expression.");
|
|
else
|
|
commonType = trueType;
|
|
|
|
if (!falseType)
|
|
m_errorReporter.typeError(3703_error, _conditional.falseExpression().location(), "Invalid mobile type in false expression.");
|
|
else
|
|
commonType = falseType;
|
|
|
|
if (!trueType && !falseType)
|
|
BOOST_THROW_EXCEPTION(FatalError());
|
|
else if (trueType && falseType)
|
|
{
|
|
commonType = Type::commonType(trueType, falseType);
|
|
|
|
if (!commonType)
|
|
{
|
|
m_errorReporter.typeError(
|
|
1080_error,
|
|
_conditional.location(),
|
|
"True expression's type " +
|
|
trueType->toString() +
|
|
" does not match false expression's type " +
|
|
falseType->toString() +
|
|
"."
|
|
);
|
|
// even we can't find a common type, we have to set a type here,
|
|
// otherwise the upper statement will not be able to check the type.
|
|
commonType = trueType;
|
|
}
|
|
}
|
|
|
|
_conditional.annotation().isConstant = false;
|
|
_conditional.annotation().type = commonType;
|
|
_conditional.annotation().isPure =
|
|
*_conditional.condition().annotation().isPure &&
|
|
*_conditional.trueExpression().annotation().isPure &&
|
|
*_conditional.falseExpression().annotation().isPure;
|
|
|
|
_conditional.annotation().isLValue = false;
|
|
|
|
if (_conditional.annotation().willBeWrittenTo)
|
|
m_errorReporter.typeError(
|
|
2212_error,
|
|
_conditional.location(),
|
|
"Conditional expression as left value is not supported yet."
|
|
);
|
|
|
|
return false;
|
|
}
|
|
|
|
void TypeChecker::checkExpressionAssignment(Type const& _type, Expression const& _expression)
|
|
{
|
|
if (auto const* tupleExpression = dynamic_cast<TupleExpression const*>(&_expression))
|
|
{
|
|
if (tupleExpression->components().empty())
|
|
m_errorReporter.typeError(5547_error, _expression.location(), "Empty tuple on the left hand side.");
|
|
|
|
auto const* tupleType = dynamic_cast<TupleType const*>(&_type);
|
|
auto const& types = tupleType && tupleExpression->components().size() != 1 ? tupleType->components() : vector<Type const*> { &_type };
|
|
|
|
solAssert(
|
|
tupleExpression->components().size() == types.size() || m_errorReporter.hasErrors(),
|
|
"Array sizes don't match and no errors generated."
|
|
);
|
|
|
|
for (size_t i = 0; i < min(tupleExpression->components().size(), types.size()); i++)
|
|
if (types[i])
|
|
{
|
|
solAssert(!!tupleExpression->components()[i], "");
|
|
checkExpressionAssignment(*types[i], *tupleExpression->components()[i]);
|
|
}
|
|
}
|
|
else if (_type.nameable() && _type.containsNestedMapping())
|
|
{
|
|
bool isLocalOrReturn = false;
|
|
if (auto const* identifier = dynamic_cast<Identifier const*>(&_expression))
|
|
if (auto const *variableDeclaration = dynamic_cast<VariableDeclaration const*>(identifier->annotation().referencedDeclaration))
|
|
if (variableDeclaration->isLocalOrReturn())
|
|
isLocalOrReturn = true;
|
|
if (!isLocalOrReturn)
|
|
m_errorReporter.typeError(9214_error, _expression.location(), "Types in storage containing (nested) mappings cannot be assigned to.");
|
|
}
|
|
}
|
|
|
|
bool TypeChecker::visit(Assignment const& _assignment)
|
|
{
|
|
requireLValue(
|
|
_assignment.leftHandSide(),
|
|
_assignment.assignmentOperator() == Token::Assign
|
|
);
|
|
Type const* t = type(_assignment.leftHandSide());
|
|
_assignment.annotation().type = t;
|
|
_assignment.annotation().isPure = false;
|
|
_assignment.annotation().isLValue = false;
|
|
_assignment.annotation().isConstant = false;
|
|
|
|
checkExpressionAssignment(*t, _assignment.leftHandSide());
|
|
|
|
if (TupleType const* tupleType = dynamic_cast<TupleType const*>(t))
|
|
{
|
|
if (_assignment.assignmentOperator() != Token::Assign)
|
|
m_errorReporter.typeError(
|
|
4289_error,
|
|
_assignment.location(),
|
|
"Compound assignment is not allowed for tuple types."
|
|
);
|
|
// Sequenced assignments of tuples is not valid, make the result a "void" type.
|
|
_assignment.annotation().type = TypeProvider::emptyTuple();
|
|
|
|
expectType(_assignment.rightHandSide(), *tupleType);
|
|
|
|
// expectType does not cause fatal errors, so we have to check again here.
|
|
if (dynamic_cast<TupleType const*>(type(_assignment.rightHandSide())))
|
|
checkDoubleStorageAssignment(_assignment);
|
|
}
|
|
else if (_assignment.assignmentOperator() == Token::Assign)
|
|
expectType(_assignment.rightHandSide(), *t);
|
|
else
|
|
{
|
|
// compound assignment
|
|
_assignment.rightHandSide().accept(*this);
|
|
Type const* resultType = t->binaryOperatorResult(
|
|
TokenTraits::AssignmentToBinaryOp(_assignment.assignmentOperator()),
|
|
type(_assignment.rightHandSide())
|
|
);
|
|
if (!resultType || *resultType != *t)
|
|
m_errorReporter.typeError(
|
|
7366_error,
|
|
_assignment.location(),
|
|
"Operator " +
|
|
string(TokenTraits::toString(_assignment.assignmentOperator())) +
|
|
" not compatible with types " +
|
|
t->toString() +
|
|
" and " +
|
|
type(_assignment.rightHandSide())->toString()
|
|
);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool TypeChecker::visit(TupleExpression const& _tuple)
|
|
{
|
|
_tuple.annotation().isConstant = false;
|
|
vector<ASTPointer<Expression>> const& components = _tuple.components();
|
|
TypePointers types;
|
|
|
|
if (_tuple.annotation().willBeWrittenTo)
|
|
{
|
|
if (_tuple.isInlineArray())
|
|
m_errorReporter.fatalTypeError(3025_error, _tuple.location(), "Inline array type cannot be declared as LValue.");
|
|
for (auto const& component: components)
|
|
if (component)
|
|
{
|
|
requireLValue(
|
|
*component,
|
|
_tuple.annotation().lValueOfOrdinaryAssignment
|
|
);
|
|
types.push_back(type(*component));
|
|
}
|
|
else
|
|
types.push_back(nullptr);
|
|
if (components.size() == 1)
|
|
_tuple.annotation().type = type(*components[0]);
|
|
else
|
|
_tuple.annotation().type = TypeProvider::tuple(move(types));
|
|
// If some of the components are not LValues, the error is reported above.
|
|
_tuple.annotation().isLValue = true;
|
|
_tuple.annotation().isPure = false;
|
|
}
|
|
else
|
|
{
|
|
bool isPure = true;
|
|
Type const* inlineArrayType = nullptr;
|
|
|
|
for (size_t i = 0; i < components.size(); ++i)
|
|
{
|
|
if (!components[i])
|
|
m_errorReporter.fatalTypeError(8381_error, _tuple.location(), "Tuple component cannot be empty.");
|
|
|
|
components[i]->accept(*this);
|
|
types.push_back(type(*components[i]));
|
|
|
|
if (types[i]->category() == Type::Category::Tuple)
|
|
if (dynamic_cast<TupleType const&>(*types[i]).components().empty())
|
|
{
|
|
if (_tuple.isInlineArray())
|
|
m_errorReporter.fatalTypeError(5604_error, components[i]->location(), "Array component cannot be empty.");
|
|
m_errorReporter.typeError(6473_error, components[i]->location(), "Tuple component cannot be empty.");
|
|
}
|
|
|
|
// Note: code generation will visit each of the expression even if they are not assigned from.
|
|
if (types[i]->category() == Type::Category::RationalNumber && components.size() > 1)
|
|
if (!dynamic_cast<RationalNumberType const&>(*types[i]).mobileType())
|
|
m_errorReporter.fatalTypeError(3390_error, components[i]->location(), "Invalid rational number.");
|
|
|
|
if (_tuple.isInlineArray())
|
|
{
|
|
solAssert(!!types[i], "Inline array cannot have empty components");
|
|
|
|
if ((i == 0 || inlineArrayType) && !types[i]->mobileType())
|
|
m_errorReporter.fatalTypeError(9563_error, components[i]->location(), "Invalid mobile type.");
|
|
|
|
if (i == 0)
|
|
inlineArrayType = types[i]->mobileType();
|
|
else if (inlineArrayType)
|
|
inlineArrayType = Type::commonType(inlineArrayType, types[i]);
|
|
}
|
|
if (!*components[i]->annotation().isPure)
|
|
isPure = false;
|
|
}
|
|
_tuple.annotation().isPure = isPure;
|
|
if (_tuple.isInlineArray())
|
|
{
|
|
if (!inlineArrayType)
|
|
m_errorReporter.fatalTypeError(6378_error, _tuple.location(), "Unable to deduce common type for array elements.");
|
|
else if (!inlineArrayType->nameable())
|
|
m_errorReporter.fatalTypeError(
|
|
9656_error,
|
|
_tuple.location(),
|
|
"Unable to deduce nameable type for array elements. Try adding explicit type conversion for the first element."
|
|
);
|
|
else if (inlineArrayType->containsNestedMapping())
|
|
m_errorReporter.fatalTypeError(
|
|
1545_error,
|
|
_tuple.location(),
|
|
"Type " + inlineArrayType->toString(true) + " is only valid in storage."
|
|
);
|
|
|
|
_tuple.annotation().type = TypeProvider::array(DataLocation::Memory, inlineArrayType, types.size());
|
|
}
|
|
else
|
|
{
|
|
if (components.size() == 1)
|
|
_tuple.annotation().type = type(*components[0]);
|
|
else
|
|
_tuple.annotation().type = TypeProvider::tuple(move(types));
|
|
}
|
|
|
|
_tuple.annotation().isLValue = false;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool TypeChecker::visit(UnaryOperation const& _operation)
|
|
{
|
|
// Inc, Dec, Add, Sub, Not, BitNot, Delete
|
|
Token op = _operation.getOperator();
|
|
bool const modifying = (op == Token::Inc || op == Token::Dec || op == Token::Delete);
|
|
if (modifying)
|
|
requireLValue(_operation.subExpression(), false);
|
|
else
|
|
_operation.subExpression().accept(*this);
|
|
Type const* subExprType = type(_operation.subExpression());
|
|
Type const* t = type(_operation.subExpression())->unaryOperatorResult(op);
|
|
if (!t)
|
|
{
|
|
string description = "Unary operator " + string(TokenTraits::toString(op)) + " cannot be applied to type " + subExprType->toString();
|
|
if (modifying)
|
|
// Cannot just report the error, ignore the unary operator, and continue,
|
|
// because the sub-expression was already processed with requireLValue()
|
|
m_errorReporter.fatalTypeError(9767_error, _operation.location(), description);
|
|
else
|
|
m_errorReporter.typeError(4907_error, _operation.location(), description);
|
|
t = subExprType;
|
|
}
|
|
_operation.annotation().type = t;
|
|
_operation.annotation().isConstant = false;
|
|
_operation.annotation().isPure = !modifying && *_operation.subExpression().annotation().isPure;
|
|
_operation.annotation().isLValue = false;
|
|
|
|
return false;
|
|
}
|
|
|
|
void TypeChecker::endVisit(BinaryOperation const& _operation)
|
|
{
|
|
Type const* leftType = type(_operation.leftExpression());
|
|
Type const* rightType = type(_operation.rightExpression());
|
|
TypeResult result = leftType->binaryOperatorResult(_operation.getOperator(), rightType);
|
|
Type const* commonType = result.get();
|
|
if (!commonType)
|
|
{
|
|
m_errorReporter.typeError(
|
|
2271_error,
|
|
_operation.location(),
|
|
"Operator " +
|
|
string(TokenTraits::toString(_operation.getOperator())) +
|
|
" not compatible with types " +
|
|
leftType->toString() +
|
|
" and " +
|
|
rightType->toString() +
|
|
(!result.message().empty() ? ". " + result.message() : "")
|
|
);
|
|
commonType = leftType;
|
|
}
|
|
_operation.annotation().commonType = commonType;
|
|
_operation.annotation().type =
|
|
TokenTraits::isCompareOp(_operation.getOperator()) ?
|
|
TypeProvider::boolean() :
|
|
commonType;
|
|
_operation.annotation().isPure =
|
|
*_operation.leftExpression().annotation().isPure &&
|
|
*_operation.rightExpression().annotation().isPure;
|
|
_operation.annotation().isLValue = false;
|
|
_operation.annotation().isConstant = false;
|
|
|
|
if (_operation.getOperator() == Token::Exp || _operation.getOperator() == Token::SHL)
|
|
{
|
|
string operation = _operation.getOperator() == Token::Exp ? "exponentiation" : "shift";
|
|
if (
|
|
leftType->category() == Type::Category::RationalNumber &&
|
|
rightType->category() != Type::Category::RationalNumber
|
|
)
|
|
{
|
|
// These rules are enforced by the binary operator, but assert them here too.
|
|
if (auto type = dynamic_cast<IntegerType const*>(commonType))
|
|
solAssert(type->numBits() == 256, "");
|
|
if (auto type = dynamic_cast<FixedPointType const*>(commonType))
|
|
solAssert(type->numBits() == 256, "");
|
|
}
|
|
if (
|
|
commonType->category() == Type::Category::Integer &&
|
|
rightType->category() == Type::Category::Integer &&
|
|
dynamic_cast<IntegerType const&>(*commonType).numBits() <
|
|
dynamic_cast<IntegerType const&>(*rightType).numBits()
|
|
)
|
|
m_errorReporter.warning(
|
|
3149_error,
|
|
_operation.location(),
|
|
"The result type of the " +
|
|
operation +
|
|
" operation is equal to the type of the first operand (" +
|
|
commonType->toString() +
|
|
") ignoring the (larger) type of the second operand (" +
|
|
rightType->toString() +
|
|
") which might be unexpected. Silence this warning by either converting "
|
|
"the first or the second operand to the type of the other."
|
|
);
|
|
}
|
|
}
|
|
|
|
Type const* TypeChecker::typeCheckTypeConversionAndRetrieveReturnType(
|
|
FunctionCall const& _functionCall
|
|
)
|
|
{
|
|
solAssert(*_functionCall.annotation().kind == FunctionCallKind::TypeConversion, "");
|
|
Type const* expressionType = type(_functionCall.expression());
|
|
|
|
vector<ASTPointer<Expression const>> const& arguments = _functionCall.arguments();
|
|
bool const isPositionalCall = _functionCall.names().empty();
|
|
|
|
Type const* resultType = dynamic_cast<TypeType const&>(*expressionType).actualType();
|
|
if (arguments.size() != 1)
|
|
m_errorReporter.typeError(
|
|
2558_error,
|
|
_functionCall.location(),
|
|
"Exactly one argument expected for explicit type conversion."
|
|
);
|
|
else if (!isPositionalCall)
|
|
m_errorReporter.typeError(
|
|
5153_error,
|
|
_functionCall.location(),
|
|
"Type conversion cannot allow named arguments."
|
|
);
|
|
else
|
|
{
|
|
Type const* argType = type(*arguments.front());
|
|
// Resulting data location is memory unless we are converting from a reference
|
|
// type with a different data location.
|
|
// (data location cannot yet be specified for type conversions)
|
|
DataLocation dataLoc = DataLocation::Memory;
|
|
if (auto argRefType = dynamic_cast<ReferenceType const*>(argType))
|
|
dataLoc = argRefType->location();
|
|
if (auto type = dynamic_cast<ReferenceType const*>(resultType))
|
|
resultType = TypeProvider::withLocation(type, dataLoc, type->isPointer());
|
|
BoolResult result = argType->isExplicitlyConvertibleTo(*resultType);
|
|
if (result)
|
|
{
|
|
if (auto argArrayType = dynamic_cast<ArrayType const*>(argType))
|
|
{
|
|
if (auto resultArrayType = dynamic_cast<ArrayType const*>(resultType))
|
|
solAssert(
|
|
argArrayType->location() != DataLocation::Storage ||
|
|
(
|
|
(
|
|
resultArrayType->isPointer() ||
|
|
(argArrayType->isByteArray() && resultArrayType->isByteArray())
|
|
) &&
|
|
resultArrayType->location() == DataLocation::Storage
|
|
),
|
|
"Invalid explicit conversion to storage type."
|
|
);
|
|
else
|
|
solAssert(
|
|
argArrayType->isByteArray() && !argArrayType->isString() && resultType->category() == Type::Category::FixedBytes,
|
|
""
|
|
);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (
|
|
resultType->category() == Type::Category::Contract &&
|
|
argType->category() == Type::Category::Address
|
|
)
|
|
{
|
|
solAssert(dynamic_cast<ContractType const*>(resultType)->isPayable(), "");
|
|
solAssert(
|
|
dynamic_cast<AddressType const*>(argType)->stateMutability() <
|
|
StateMutability::Payable,
|
|
""
|
|
);
|
|
SecondarySourceLocation ssl;
|
|
if (
|
|
auto const* identifier = dynamic_cast<Identifier const*>(arguments.front().get())
|
|
)
|
|
if (
|
|
auto const* variableDeclaration = dynamic_cast<VariableDeclaration const*>(
|
|
identifier->annotation().referencedDeclaration
|
|
)
|
|
)
|
|
ssl.append(
|
|
"Did you mean to declare this variable as \"address payable\"?",
|
|
variableDeclaration->location()
|
|
);
|
|
m_errorReporter.typeError(
|
|
7398_error,
|
|
_functionCall.location(),
|
|
ssl,
|
|
"Explicit type conversion not allowed from non-payable \"address\" to \"" +
|
|
resultType->toString() +
|
|
"\", which has a payable fallback function."
|
|
);
|
|
}
|
|
else if (
|
|
auto const* functionType = dynamic_cast<FunctionType const*>(argType);
|
|
functionType &&
|
|
functionType->kind() == FunctionType::Kind::External &&
|
|
resultType->category() == Type::Category::Address
|
|
)
|
|
m_errorReporter.typeError(
|
|
5030_error,
|
|
_functionCall.location(),
|
|
"Explicit type conversion not allowed from \"" +
|
|
argType->toString() +
|
|
"\" to \"" +
|
|
resultType->toString() +
|
|
"\". To obtain the address of the contract of the function, " +
|
|
"you can use the .address member of the function."
|
|
);
|
|
else
|
|
m_errorReporter.typeErrorConcatenateDescriptions(
|
|
9640_error,
|
|
_functionCall.location(),
|
|
"Explicit type conversion not allowed from \"" +
|
|
argType->toString() +
|
|
"\" to \"" +
|
|
resultType->toString() +
|
|
"\".",
|
|
result.message()
|
|
);
|
|
}
|
|
}
|
|
return resultType;
|
|
}
|
|
|
|
void TypeChecker::typeCheckFunctionCall(
|
|
FunctionCall const& _functionCall,
|
|
FunctionTypePointer _functionType
|
|
)
|
|
{
|
|
// Actual function call or struct constructor call.
|
|
|
|
solAssert(!!_functionType, "");
|
|
solAssert(_functionType->kind() != FunctionType::Kind::ABIDecode, "");
|
|
|
|
if (_functionType->kind() == FunctionType::Kind::Declaration)
|
|
{
|
|
solAssert(_functionType->declaration().annotation().contract, "");
|
|
if (
|
|
m_currentContract &&
|
|
m_currentContract->derivesFrom(*_functionType->declaration().annotation().contract) &&
|
|
!dynamic_cast<FunctionDefinition const&>(_functionType->declaration()).isImplemented()
|
|
)
|
|
m_errorReporter.typeError(
|
|
7501_error,
|
|
_functionCall.location(),
|
|
"Cannot call unimplemented base function."
|
|
);
|
|
else
|
|
m_errorReporter.typeError(
|
|
3419_error,
|
|
_functionCall.location(),
|
|
"Cannot call function via contract type name."
|
|
);
|
|
return;
|
|
}
|
|
|
|
// Check for unsupported use of bare static call
|
|
if (
|
|
_functionType->kind() == FunctionType::Kind::BareStaticCall &&
|
|
!m_evmVersion.hasStaticCall()
|
|
)
|
|
m_errorReporter.typeError(
|
|
5052_error,
|
|
_functionCall.location(),
|
|
"\"staticcall\" is not supported by the VM version."
|
|
);
|
|
|
|
// Perform standard function call type checking
|
|
typeCheckFunctionGeneralChecks(_functionCall, _functionType);
|
|
}
|
|
|
|
void TypeChecker::typeCheckFallbackFunction(FunctionDefinition const& _function)
|
|
{
|
|
solAssert(_function.isFallback(), "");
|
|
|
|
if (_function.libraryFunction())
|
|
m_errorReporter.typeError(5982_error, _function.location(), "Libraries cannot have fallback functions.");
|
|
if (_function.stateMutability() != StateMutability::NonPayable && _function.stateMutability() != StateMutability::Payable)
|
|
m_errorReporter.typeError(
|
|
4575_error,
|
|
_function.location(),
|
|
"Fallback function must be payable or non-payable, but is \"" +
|
|
stateMutabilityToString(_function.stateMutability()) +
|
|
"\"."
|
|
);
|
|
if (_function.visibility() != Visibility::External)
|
|
m_errorReporter.typeError(1159_error, _function.location(), "Fallback function must be defined as \"external\".");
|
|
|
|
if (!_function.returnParameters().empty() || !_function.parameters().empty())
|
|
{
|
|
if (
|
|
_function.returnParameters().size() != 1 ||
|
|
*type(*_function.returnParameters().front()) != *TypeProvider::bytesMemory() ||
|
|
_function.parameters().size() != 1 ||
|
|
*type(*_function.parameters().front()) != *TypeProvider::bytesCalldata()
|
|
)
|
|
m_errorReporter.typeError(
|
|
5570_error,
|
|
_function.returnParameterList()->location(),
|
|
"Fallback function either has to have the signature \"fallback()\" or \"fallback(bytes calldata) returns (bytes memory)\"."
|
|
);
|
|
}
|
|
}
|
|
|
|
void TypeChecker::typeCheckReceiveFunction(FunctionDefinition const& _function)
|
|
{
|
|
solAssert(_function.isReceive(), "");
|
|
|
|
if (_function.libraryFunction())
|
|
m_errorReporter.typeError(4549_error, _function.location(), "Libraries cannot have receive ether functions.");
|
|
|
|
if (_function.stateMutability() != StateMutability::Payable)
|
|
m_errorReporter.typeError(
|
|
7793_error,
|
|
_function.location(),
|
|
"Receive ether function must be payable, but is \"" +
|
|
stateMutabilityToString(_function.stateMutability()) +
|
|
"\"."
|
|
);
|
|
if (_function.visibility() != Visibility::External)
|
|
m_errorReporter.typeError(4095_error, _function.location(), "Receive ether function must be defined as \"external\".");
|
|
if (!_function.returnParameters().empty())
|
|
m_errorReporter.typeError(6899_error, _function.returnParameterList()->location(), "Receive ether function cannot return values.");
|
|
if (!_function.parameters().empty())
|
|
m_errorReporter.typeError(6857_error, _function.parameterList().location(), "Receive ether function cannot take parameters.");
|
|
}
|
|
|
|
|
|
void TypeChecker::typeCheckConstructor(FunctionDefinition const& _function)
|
|
{
|
|
solAssert(_function.isConstructor(), "");
|
|
if (_function.overrides())
|
|
m_errorReporter.typeError(1209_error, _function.location(), "Constructors cannot override.");
|
|
if (!_function.returnParameters().empty())
|
|
m_errorReporter.typeError(9712_error, _function.returnParameterList()->location(), "Non-empty \"returns\" directive for constructor.");
|
|
if (_function.stateMutability() != StateMutability::NonPayable && _function.stateMutability() != StateMutability::Payable)
|
|
m_errorReporter.typeError(
|
|
1558_error,
|
|
_function.location(),
|
|
"Constructor must be payable or non-payable, but is \"" +
|
|
stateMutabilityToString(_function.stateMutability()) +
|
|
"\"."
|
|
);
|
|
if (!_function.noVisibilitySpecified())
|
|
{
|
|
auto const& contract = dynamic_cast<ContractDefinition const&>(*_function.scope());
|
|
if (_function.visibility() != Visibility::Public && _function.visibility() != Visibility::Internal)
|
|
m_errorReporter.typeError(9239_error, _function.location(), "Constructor cannot have visibility.");
|
|
else if (_function.isPublic() && contract.abstract())
|
|
m_errorReporter.declarationError(
|
|
8295_error,
|
|
_function.location(),
|
|
"Abstract contracts cannot have public constructors. Remove the \"public\" keyword to fix this."
|
|
);
|
|
else if (!_function.isPublic() && !contract.abstract())
|
|
m_errorReporter.declarationError(
|
|
1845_error,
|
|
_function.location(),
|
|
"Non-abstract contracts cannot have internal constructors. Remove the \"internal\" keyword and make the contract abstract to fix this."
|
|
);
|
|
else
|
|
m_errorReporter.warning(
|
|
2462_error,
|
|
_function.location(),
|
|
"Visibility for constructor is ignored. If you want the contract to be non-deployable, making it \"abstract\" is sufficient."
|
|
);
|
|
}
|
|
}
|
|
|
|
void TypeChecker::typeCheckABIEncodeFunctions(
|
|
FunctionCall const& _functionCall,
|
|
FunctionTypePointer _functionType
|
|
)
|
|
{
|
|
solAssert(!!_functionType, "");
|
|
solAssert(
|
|
_functionType->kind() == FunctionType::Kind::ABIEncode ||
|
|
_functionType->kind() == FunctionType::Kind::ABIEncodePacked ||
|
|
_functionType->kind() == FunctionType::Kind::ABIEncodeWithSelector ||
|
|
_functionType->kind() == FunctionType::Kind::ABIEncodeWithSignature,
|
|
"ABI function has unexpected FunctionType::Kind."
|
|
);
|
|
solAssert(_functionType->takesArbitraryParameters(), "ABI functions should be variadic.");
|
|
|
|
bool const isPacked = _functionType->kind() == FunctionType::Kind::ABIEncodePacked;
|
|
solAssert(_functionType->padArguments() != isPacked, "ABI function with unexpected padding");
|
|
|
|
bool const abiEncoderV2 = useABICoderV2();
|
|
|
|
// Check for named arguments
|
|
if (!_functionCall.names().empty())
|
|
{
|
|
m_errorReporter.typeError(
|
|
2627_error,
|
|
_functionCall.location(),
|
|
"Named arguments cannot be used for functions that take arbitrary parameters."
|
|
);
|
|
return;
|
|
}
|
|
|
|
// Perform standard function call type checking
|
|
typeCheckFunctionGeneralChecks(_functionCall, _functionType);
|
|
|
|
// Check additional arguments for variadic functions
|
|
vector<ASTPointer<Expression const>> const& arguments = _functionCall.arguments();
|
|
for (size_t i = 0; i < arguments.size(); ++i)
|
|
{
|
|
auto const& argType = type(*arguments[i]);
|
|
|
|
if (argType->category() == Type::Category::RationalNumber)
|
|
{
|
|
auto const& rationalType = dynamic_cast<RationalNumberType const&>(*argType);
|
|
if (rationalType.isFractional())
|
|
{
|
|
m_errorReporter.typeError(
|
|
6090_error,
|
|
arguments[i]->location(),
|
|
"Fractional numbers cannot yet be encoded."
|
|
);
|
|
continue;
|
|
}
|
|
else if (!argType->mobileType())
|
|
{
|
|
m_errorReporter.typeError(
|
|
8009_error,
|
|
arguments[i]->location(),
|
|
"Invalid rational number (too large or division by zero)."
|
|
);
|
|
continue;
|
|
}
|
|
else if (isPacked)
|
|
{
|
|
m_errorReporter.typeError(
|
|
7279_error,
|
|
arguments[i]->location(),
|
|
"Cannot perform packed encoding for a literal."
|
|
" Please convert it to an explicit type first."
|
|
);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if (isPacked && !typeSupportedByOldABIEncoder(*argType, false /* isLibrary */))
|
|
{
|
|
m_errorReporter.typeError(
|
|
9578_error,
|
|
arguments[i]->location(),
|
|
"Type not supported in packed mode."
|
|
);
|
|
continue;
|
|
}
|
|
|
|
if (!argType->fullEncodingType(false, abiEncoderV2, !_functionType->padArguments()))
|
|
m_errorReporter.typeError(
|
|
2056_error,
|
|
arguments[i]->location(),
|
|
"This type cannot be encoded."
|
|
);
|
|
}
|
|
}
|
|
|
|
void TypeChecker::typeCheckBytesConcatFunction(
|
|
FunctionCall const& _functionCall,
|
|
FunctionType const* _functionType
|
|
)
|
|
{
|
|
solAssert(_functionType, "");
|
|
solAssert(_functionType->kind() == FunctionType::Kind::BytesConcat, "");
|
|
solAssert(_functionCall.names().empty(), "");
|
|
|
|
typeCheckFunctionGeneralChecks(_functionCall, _functionType);
|
|
|
|
for (shared_ptr<Expression const> const& argument: _functionCall.arguments())
|
|
if (
|
|
Type const* argumentType = type(*argument);
|
|
!argumentType->isImplicitlyConvertibleTo(*TypeProvider::fixedBytes(32)) &&
|
|
!argumentType->isImplicitlyConvertibleTo(*TypeProvider::bytesMemory())
|
|
)
|
|
m_errorReporter.typeError(
|
|
8015_error,
|
|
argument->location(),
|
|
"Invalid type for argument in the bytes.concat function call. "
|
|
"bytes or fixed bytes type is required, but " +
|
|
argumentType->toString(true) + " provided."
|
|
);
|
|
}
|
|
|
|
void TypeChecker::typeCheckFunctionGeneralChecks(
|
|
FunctionCall const& _functionCall,
|
|
FunctionTypePointer _functionType
|
|
)
|
|
{
|
|
// Actual function call or struct constructor call.
|
|
|
|
solAssert(!!_functionType, "");
|
|
solAssert(_functionType->kind() != FunctionType::Kind::ABIDecode, "");
|
|
|
|
bool const isPositionalCall = _functionCall.names().empty();
|
|
bool const isVariadic = _functionType->takesArbitraryParameters();
|
|
|
|
auto functionCallKind = *_functionCall.annotation().kind;
|
|
|
|
solAssert(
|
|
!isVariadic || functionCallKind == FunctionCallKind::FunctionCall,
|
|
"Struct constructor calls cannot be variadic."
|
|
);
|
|
|
|
TypePointers const& parameterTypes = _functionType->parameterTypes();
|
|
vector<ASTPointer<Expression const>> const& arguments = _functionCall.arguments();
|
|
vector<ASTPointer<ASTString>> const& argumentNames = _functionCall.names();
|
|
|
|
// Check number of passed in arguments
|
|
if (
|
|
arguments.size() < parameterTypes.size() ||
|
|
(!isVariadic && arguments.size() > parameterTypes.size())
|
|
)
|
|
{
|
|
bool const isStructConstructorCall =
|
|
functionCallKind == FunctionCallKind::StructConstructorCall;
|
|
|
|
auto [errorId, description] = [&]() -> tuple<ErrorId, string> {
|
|
string msg = isVariadic ?
|
|
"Need at least " +
|
|
toString(parameterTypes.size()) +
|
|
" arguments for " +
|
|
string(isStructConstructorCall ? "struct constructor" : "function call") +
|
|
", but provided only " +
|
|
toString(arguments.size()) +
|
|
"."
|
|
:
|
|
"Wrong argument count for " +
|
|
string(isStructConstructorCall ? "struct constructor" : "function call") +
|
|
": " +
|
|
toString(arguments.size()) +
|
|
" arguments given but " +
|
|
string(isVariadic ? "need at least " : "expected ") +
|
|
toString(parameterTypes.size()) +
|
|
".";
|
|
|
|
if (isStructConstructorCall)
|
|
{
|
|
solAssert(!isVariadic, "");
|
|
return { 9755_error, msg };
|
|
}
|
|
else if (
|
|
_functionType->kind() == FunctionType::Kind::BareCall ||
|
|
_functionType->kind() == FunctionType::Kind::BareCallCode ||
|
|
_functionType->kind() == FunctionType::Kind::BareDelegateCall ||
|
|
_functionType->kind() == FunctionType::Kind::BareStaticCall
|
|
)
|
|
{
|
|
solAssert(!isVariadic, "");
|
|
if (arguments.empty())
|
|
return {
|
|
6138_error,
|
|
msg +
|
|
" This function requires a single bytes argument."
|
|
" Use \"\" as argument to provide empty calldata."
|
|
};
|
|
else
|
|
return {
|
|
8922_error,
|
|
msg +
|
|
" This function requires a single bytes argument."
|
|
" If all your arguments are value types, you can use"
|
|
" abi.encode(...) to properly generate it."
|
|
};
|
|
}
|
|
else if (
|
|
_functionType->kind() == FunctionType::Kind::KECCAK256 ||
|
|
_functionType->kind() == FunctionType::Kind::SHA256 ||
|
|
_functionType->kind() == FunctionType::Kind::RIPEMD160
|
|
)
|
|
{
|
|
solAssert(!isVariadic, "");
|
|
return {
|
|
4323_error,
|
|
msg +
|
|
" This function requires a single bytes argument."
|
|
" Use abi.encodePacked(...) to obtain the pre-0.5.0"
|
|
" behaviour or abi.encode(...) to use ABI encoding."
|
|
};
|
|
}
|
|
else
|
|
return { isVariadic ? 9308_error : 6160_error, msg };
|
|
}();
|
|
|
|
m_errorReporter.typeError(errorId, _functionCall.location(), description);
|
|
return;
|
|
}
|
|
|
|
// Parameter to argument map
|
|
std::vector<Expression const*> paramArgMap(parameterTypes.size());
|
|
|
|
// Map parameters to arguments - trivially for positional calls, less so for named calls
|
|
if (isPositionalCall)
|
|
for (size_t i = 0; i < paramArgMap.size(); ++i)
|
|
paramArgMap[i] = arguments[i].get();
|
|
else
|
|
{
|
|
auto const& parameterNames = _functionType->parameterNames();
|
|
|
|
solAssert(
|
|
parameterNames.size() == argumentNames.size(),
|
|
"Unexpected parameter length mismatch!"
|
|
);
|
|
|
|
// Check for duplicate argument names
|
|
{
|
|
bool duplication = false;
|
|
for (size_t i = 0; i < argumentNames.size(); i++)
|
|
for (size_t j = i + 1; j < argumentNames.size(); j++)
|
|
if (*argumentNames[i] == *argumentNames[j])
|
|
{
|
|
duplication = true;
|
|
m_errorReporter.typeError(
|
|
6995_error,
|
|
arguments[i]->location(),
|
|
"Duplicate named argument \"" + *argumentNames[i] + "\"."
|
|
);
|
|
}
|
|
if (duplication)
|
|
return;
|
|
}
|
|
|
|
// map parameter names to argument names
|
|
{
|
|
bool not_all_mapped = false;
|
|
|
|
for (size_t i = 0; i < argumentNames.size(); i++)
|
|
{
|
|
size_t j;
|
|
for (j = 0; j < parameterNames.size(); j++)
|
|
if (parameterNames[j] == *argumentNames[i])
|
|
break;
|
|
|
|
if (j < parameterNames.size())
|
|
paramArgMap[j] = arguments[i].get();
|
|
else
|
|
{
|
|
not_all_mapped = true;
|
|
m_errorReporter.typeError(
|
|
4974_error,
|
|
_functionCall.location(),
|
|
"Named argument \"" +
|
|
*argumentNames[i] +
|
|
"\" does not match function declaration."
|
|
);
|
|
}
|
|
}
|
|
|
|
if (not_all_mapped)
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Check for compatible types between arguments and parameters
|
|
for (size_t i = 0; i < paramArgMap.size(); ++i)
|
|
{
|
|
solAssert(!!paramArgMap[i], "unmapped parameter");
|
|
BoolResult result = type(*paramArgMap[i])->isImplicitlyConvertibleTo(*parameterTypes[i]);
|
|
if (!result)
|
|
{
|
|
auto [errorId, description] = [&]() -> tuple<ErrorId, string> {
|
|
string msg =
|
|
"Invalid type for argument in function call. "
|
|
"Invalid implicit conversion from " +
|
|
type(*paramArgMap[i])->toString() +
|
|
" to " +
|
|
parameterTypes[i]->toString() +
|
|
" requested.";
|
|
if (!result.message().empty())
|
|
msg += " " + result.message();
|
|
if (
|
|
_functionType->kind() == FunctionType::Kind::BareCall ||
|
|
_functionType->kind() == FunctionType::Kind::BareCallCode ||
|
|
_functionType->kind() == FunctionType::Kind::BareDelegateCall ||
|
|
_functionType->kind() == FunctionType::Kind::BareStaticCall
|
|
)
|
|
return {
|
|
8051_error,
|
|
msg +
|
|
" This function requires a single bytes argument."
|
|
" If all your arguments are value types, you can"
|
|
" use abi.encode(...) to properly generate it."
|
|
};
|
|
else if (
|
|
_functionType->kind() == FunctionType::Kind::KECCAK256 ||
|
|
_functionType->kind() == FunctionType::Kind::SHA256 ||
|
|
_functionType->kind() == FunctionType::Kind::RIPEMD160
|
|
)
|
|
return {
|
|
7556_error,
|
|
msg +
|
|
" This function requires a single bytes argument."
|
|
" Use abi.encodePacked(...) to obtain the pre-0.5.0"
|
|
" behaviour or abi.encode(...) to use ABI encoding."
|
|
};
|
|
else
|
|
return { 9553_error, msg };
|
|
}();
|
|
m_errorReporter.typeError(errorId, paramArgMap[i]->location(), description);
|
|
}
|
|
}
|
|
|
|
TypePointers const& returnParameterTypes = _functionType->returnParameterTypes();
|
|
bool isLibraryCall = (_functionType->kind() == FunctionType::Kind::DelegateCall);
|
|
bool callRequiresABIEncoding =
|
|
// ABIEncode/ABIDecode calls not included because they should have been already validated
|
|
// at this point and they have variadic arguments so they need special handling.
|
|
_functionType->kind() == FunctionType::Kind::DelegateCall ||
|
|
_functionType->kind() == FunctionType::Kind::External ||
|
|
_functionType->kind() == FunctionType::Kind::Creation ||
|
|
_functionType->kind() == FunctionType::Kind::Event ||
|
|
_functionType->kind() == FunctionType::Kind::Error;
|
|
|
|
if (callRequiresABIEncoding && !useABICoderV2())
|
|
{
|
|
solAssert(!isVariadic, "");
|
|
solAssert(parameterTypes.size() == arguments.size(), "");
|
|
solAssert(!_functionType->isBareCall(), "");
|
|
solAssert(*_functionCall.annotation().kind == FunctionCallKind::FunctionCall, "");
|
|
|
|
for (size_t i = 0; i < parameterTypes.size(); ++i)
|
|
{
|
|
solAssert(parameterTypes[i], "");
|
|
|
|
if (!typeSupportedByOldABIEncoder(*parameterTypes[i], isLibraryCall))
|
|
m_errorReporter.typeError(
|
|
2443_error,
|
|
paramArgMap[i]->location(),
|
|
"The type of this parameter, " + parameterTypes[i]->toString(true) + ", "
|
|
"is only supported in ABI coder v2. "
|
|
"Use \"pragma abicoder v2;\" to enable the feature."
|
|
);
|
|
}
|
|
|
|
for (size_t i = 0; i < returnParameterTypes.size(); ++i)
|
|
{
|
|
solAssert(returnParameterTypes[i], "");
|
|
|
|
if (!typeSupportedByOldABIEncoder(*returnParameterTypes[i], isLibraryCall))
|
|
m_errorReporter.typeError(
|
|
2428_error,
|
|
_functionCall.location(),
|
|
"The type of return parameter " + toString(i + 1) + ", " + returnParameterTypes[i]->toString(true) + ", "
|
|
"is only supported in ABI coder v2. "
|
|
"Use \"pragma abicoder v2;\" to enable the feature."
|
|
);
|
|
}
|
|
}
|
|
}
|
|
|
|
bool TypeChecker::visit(FunctionCall const& _functionCall)
|
|
{
|
|
vector<ASTPointer<Expression const>> const& arguments = _functionCall.arguments();
|
|
bool argumentsArePure = true;
|
|
|
|
// We need to check arguments' type first as they will be needed for overload resolution.
|
|
for (ASTPointer<Expression const> const& argument: arguments)
|
|
{
|
|
argument->accept(*this);
|
|
if (!*argument->annotation().isPure)
|
|
argumentsArePure = false;
|
|
}
|
|
|
|
// Store argument types - and names if given - for overload resolution
|
|
{
|
|
FuncCallArguments funcCallArgs;
|
|
|
|
funcCallArgs.names = _functionCall.names();
|
|
|
|
for (ASTPointer<Expression const> const& argument: arguments)
|
|
funcCallArgs.types.push_back(type(*argument));
|
|
|
|
_functionCall.expression().annotation().arguments = std::move(funcCallArgs);
|
|
}
|
|
|
|
_functionCall.expression().accept(*this);
|
|
|
|
Type const* expressionType = type(_functionCall.expression());
|
|
|
|
// Determine function call kind and function type for this FunctionCall node
|
|
FunctionCallAnnotation& funcCallAnno = _functionCall.annotation();
|
|
FunctionTypePointer functionType = nullptr;
|
|
funcCallAnno.isConstant = false;
|
|
|
|
bool isLValue = false;
|
|
|
|
// Determine and assign function call kind, lvalue, purity and function type for this FunctionCall node
|
|
switch (expressionType->category())
|
|
{
|
|
case Type::Category::Function:
|
|
functionType = dynamic_cast<FunctionType const*>(expressionType);
|
|
funcCallAnno.kind = FunctionCallKind::FunctionCall;
|
|
|
|
if (auto memberAccess = dynamic_cast<MemberAccess const*>(&_functionCall.expression()))
|
|
{
|
|
if (dynamic_cast<FunctionDefinition const*>(memberAccess->annotation().referencedDeclaration))
|
|
_functionCall.expression().annotation().calledDirectly = true;
|
|
}
|
|
else if (auto identifier = dynamic_cast<Identifier const*>(&_functionCall.expression()))
|
|
if (dynamic_cast<FunctionDefinition const*>(identifier->annotation().referencedDeclaration))
|
|
_functionCall.expression().annotation().calledDirectly = true;
|
|
|
|
// Purity for function calls also depends upon the callee and its FunctionType
|
|
funcCallAnno.isPure =
|
|
argumentsArePure &&
|
|
*_functionCall.expression().annotation().isPure &&
|
|
functionType->isPure();
|
|
|
|
if (functionType->kind() == FunctionType::Kind::ArrayPush)
|
|
isLValue = functionType->parameterTypes().empty();
|
|
|
|
break;
|
|
|
|
case Type::Category::TypeType:
|
|
{
|
|
// Determine type for type conversion or struct construction expressions
|
|
Type const* actualType = dynamic_cast<TypeType const&>(*expressionType).actualType();
|
|
solAssert(!!actualType, "");
|
|
|
|
if (actualType->category() == Type::Category::Struct)
|
|
{
|
|
if (actualType->containsNestedMapping())
|
|
m_errorReporter.fatalTypeError(
|
|
9515_error,
|
|
_functionCall.location(),
|
|
"Struct containing a (nested) mapping cannot be constructed."
|
|
);
|
|
functionType = dynamic_cast<StructType const&>(*actualType).constructorType();
|
|
funcCallAnno.kind = FunctionCallKind::StructConstructorCall;
|
|
}
|
|
else
|
|
{
|
|
if (auto const* contractType = dynamic_cast<ContractType const*>(actualType))
|
|
if (contractType->isSuper())
|
|
m_errorReporter.fatalTypeError(
|
|
1744_error,
|
|
_functionCall.location(),
|
|
"Cannot convert to the super type."
|
|
);
|
|
funcCallAnno.kind = FunctionCallKind::TypeConversion;
|
|
}
|
|
|
|
funcCallAnno.isPure = argumentsArePure;
|
|
|
|
break;
|
|
}
|
|
|
|
default:
|
|
m_errorReporter.fatalTypeError(5704_error, _functionCall.location(), "Type is not callable");
|
|
// Unreachable, because fatalTypeError throws. We don't set kind, but that's okay because the switch below
|
|
// is never reached. And, even if it was, SetOnce would trigger an assertion violation and not UB.
|
|
funcCallAnno.isPure = argumentsArePure;
|
|
break;
|
|
}
|
|
|
|
funcCallAnno.isLValue = isLValue;
|
|
|
|
// Determine return types
|
|
switch (*funcCallAnno.kind)
|
|
{
|
|
case FunctionCallKind::TypeConversion:
|
|
funcCallAnno.type = typeCheckTypeConversionAndRetrieveReturnType(_functionCall);
|
|
break;
|
|
|
|
case FunctionCallKind::StructConstructorCall: // fall-through
|
|
case FunctionCallKind::FunctionCall:
|
|
{
|
|
TypePointers returnTypes;
|
|
|
|
switch (functionType->kind())
|
|
{
|
|
case FunctionType::Kind::ABIDecode:
|
|
{
|
|
returnTypes = typeCheckABIDecodeAndRetrieveReturnType(
|
|
_functionCall,
|
|
useABICoderV2()
|
|
);
|
|
break;
|
|
}
|
|
case FunctionType::Kind::ABIEncode:
|
|
case FunctionType::Kind::ABIEncodePacked:
|
|
case FunctionType::Kind::ABIEncodeWithSelector:
|
|
case FunctionType::Kind::ABIEncodeWithSignature:
|
|
{
|
|
typeCheckABIEncodeFunctions(_functionCall, functionType);
|
|
returnTypes = functionType->returnParameterTypes();
|
|
break;
|
|
}
|
|
case FunctionType::Kind::MetaType:
|
|
returnTypes = typeCheckMetaTypeFunctionAndRetrieveReturnType(_functionCall);
|
|
break;
|
|
case FunctionType::Kind::BytesConcat:
|
|
{
|
|
typeCheckBytesConcatFunction(_functionCall, functionType);
|
|
returnTypes = functionType->returnParameterTypes();
|
|
break;
|
|
}
|
|
default:
|
|
{
|
|
typeCheckFunctionCall(_functionCall, functionType);
|
|
returnTypes = m_evmVersion.supportsReturndata() ?
|
|
functionType->returnParameterTypes() :
|
|
functionType->returnParameterTypesWithoutDynamicTypes();
|
|
break;
|
|
}
|
|
}
|
|
|
|
funcCallAnno.type = returnTypes.size() == 1 ?
|
|
move(returnTypes.front()) :
|
|
TypeProvider::tuple(move(returnTypes));
|
|
|
|
break;
|
|
}
|
|
|
|
default:
|
|
// for non-callables, ensure error reported and annotate node to void function
|
|
solAssert(m_errorReporter.hasErrors(), "");
|
|
funcCallAnno.kind = FunctionCallKind::FunctionCall;
|
|
funcCallAnno.type = TypeProvider::emptyTuple();
|
|
break;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool TypeChecker::visit(FunctionCallOptions const& _functionCallOptions)
|
|
{
|
|
solAssert(_functionCallOptions.options().size() == _functionCallOptions.names().size(), "Lengths of name & value arrays differ!");
|
|
|
|
_functionCallOptions.expression().annotation().arguments = _functionCallOptions.annotation().arguments;
|
|
|
|
_functionCallOptions.expression().accept(*this);
|
|
|
|
_functionCallOptions.annotation().isPure = false;
|
|
_functionCallOptions.annotation().isConstant = false;
|
|
_functionCallOptions.annotation().isLValue = false;
|
|
|
|
auto expressionFunctionType = dynamic_cast<FunctionType const*>(type(_functionCallOptions.expression()));
|
|
if (!expressionFunctionType)
|
|
{
|
|
m_errorReporter.fatalTypeError(2622_error, _functionCallOptions.location(), "Expected callable expression before call options.");
|
|
return false;
|
|
}
|
|
|
|
bool setSalt = false;
|
|
bool setValue = false;
|
|
bool setGas = false;
|
|
|
|
FunctionType::Kind kind = expressionFunctionType->kind();
|
|
if (
|
|
kind != FunctionType::Kind::Creation &&
|
|
kind != FunctionType::Kind::External &&
|
|
kind != FunctionType::Kind::BareCall &&
|
|
kind != FunctionType::Kind::BareCallCode &&
|
|
kind != FunctionType::Kind::BareDelegateCall &&
|
|
kind != FunctionType::Kind::BareStaticCall
|
|
)
|
|
{
|
|
m_errorReporter.fatalTypeError(
|
|
2193_error,
|
|
_functionCallOptions.location(),
|
|
"Function call options can only be set on external function calls or contract creations."
|
|
);
|
|
return false;
|
|
}
|
|
|
|
if (
|
|
expressionFunctionType->valueSet() ||
|
|
expressionFunctionType->gasSet() ||
|
|
expressionFunctionType->saltSet()
|
|
)
|
|
m_errorReporter.typeError(
|
|
1645_error,
|
|
_functionCallOptions.location(),
|
|
"Function call options have already been set, you have to combine them into a single "
|
|
"{...}-option."
|
|
);
|
|
|
|
auto setCheckOption = [&](bool& _option, string const& _name)
|
|
{
|
|
if (_option)
|
|
m_errorReporter.typeError(
|
|
9886_error,
|
|
_functionCallOptions.location(),
|
|
"Duplicate option \"" + std::move(_name) + "\"."
|
|
);
|
|
|
|
_option = true;
|
|
};
|
|
|
|
for (size_t i = 0; i < _functionCallOptions.names().size(); ++i)
|
|
{
|
|
string const& name = *(_functionCallOptions.names()[i]);
|
|
if (name == "salt")
|
|
{
|
|
if (kind == FunctionType::Kind::Creation)
|
|
{
|
|
setCheckOption(setSalt, "salt");
|
|
expectType(*_functionCallOptions.options()[i], *TypeProvider::fixedBytes(32));
|
|
}
|
|
else
|
|
m_errorReporter.typeError(
|
|
2721_error,
|
|
_functionCallOptions.location(),
|
|
"Function call option \"salt\" can only be used with \"new\"."
|
|
);
|
|
}
|
|
else if (name == "value")
|
|
{
|
|
if (kind == FunctionType::Kind::BareDelegateCall)
|
|
m_errorReporter.typeError(
|
|
6189_error,
|
|
_functionCallOptions.location(),
|
|
"Cannot set option \"value\" for delegatecall."
|
|
);
|
|
else if (kind == FunctionType::Kind::BareStaticCall)
|
|
m_errorReporter.typeError(
|
|
2842_error,
|
|
_functionCallOptions.location(),
|
|
"Cannot set option \"value\" for staticcall."
|
|
);
|
|
else if (!expressionFunctionType->isPayable())
|
|
m_errorReporter.typeError(
|
|
7006_error,
|
|
_functionCallOptions.location(),
|
|
kind == FunctionType::Kind::Creation ?
|
|
"Cannot set option \"value\", since the constructor of " +
|
|
expressionFunctionType->returnParameterTypes().front()->toString() +
|
|
" is not payable." :
|
|
"Cannot set option \"value\" on a non-payable function type."
|
|
);
|
|
else
|
|
{
|
|
expectType(*_functionCallOptions.options()[i], *TypeProvider::uint256());
|
|
|
|
setCheckOption(setValue, "value");
|
|
}
|
|
}
|
|
else if (name == "gas")
|
|
{
|
|
if (kind == FunctionType::Kind::Creation)
|
|
m_errorReporter.typeError(
|
|
9903_error,
|
|
_functionCallOptions.location(),
|
|
"Function call option \"gas\" cannot be used with \"new\"."
|
|
);
|
|
else
|
|
{
|
|
expectType(*_functionCallOptions.options()[i], *TypeProvider::uint256());
|
|
|
|
setCheckOption(setGas, "gas");
|
|
}
|
|
}
|
|
else
|
|
m_errorReporter.typeError(
|
|
9318_error,
|
|
_functionCallOptions.location(),
|
|
"Unknown call option \"" + name + "\". Valid options are \"salt\", \"value\" and \"gas\"."
|
|
);
|
|
}
|
|
|
|
if (setSalt && !m_evmVersion.hasCreate2())
|
|
m_errorReporter.typeError(
|
|
5189_error,
|
|
_functionCallOptions.location(),
|
|
"Unsupported call option \"salt\" (requires Constantinople-compatible VMs)."
|
|
);
|
|
|
|
_functionCallOptions.annotation().type = expressionFunctionType->copyAndSetCallOptions(setGas, setValue, setSalt);
|
|
return false;
|
|
}
|
|
|
|
void TypeChecker::endVisit(NewExpression const& _newExpression)
|
|
{
|
|
Type const* type = _newExpression.typeName().annotation().type;
|
|
solAssert(!!type, "Type name not resolved.");
|
|
|
|
_newExpression.annotation().isConstant = false;
|
|
_newExpression.annotation().isLValue = false;
|
|
|
|
if (auto contractName = dynamic_cast<UserDefinedTypeName const*>(&_newExpression.typeName()))
|
|
{
|
|
auto contract = dynamic_cast<ContractDefinition const*>(&dereference(contractName->pathNode()));
|
|
|
|
if (!contract)
|
|
m_errorReporter.fatalTypeError(5540_error, _newExpression.location(), "Identifier is not a contract.");
|
|
if (contract->isInterface())
|
|
m_errorReporter.fatalTypeError(2971_error, _newExpression.location(), "Cannot instantiate an interface.");
|
|
if (contract->abstract())
|
|
m_errorReporter.typeError(4614_error, _newExpression.location(), "Cannot instantiate an abstract contract.");
|
|
|
|
_newExpression.annotation().type = FunctionType::newExpressionType(*contract);
|
|
_newExpression.annotation().isPure = false;
|
|
}
|
|
else if (type->category() == Type::Category::Array)
|
|
{
|
|
if (type->containsNestedMapping())
|
|
m_errorReporter.fatalTypeError(
|
|
1164_error,
|
|
_newExpression.typeName().location(),
|
|
"Array containing a (nested) mapping cannot be constructed in memory."
|
|
);
|
|
if (!type->isDynamicallySized())
|
|
m_errorReporter.typeError(
|
|
3904_error,
|
|
_newExpression.typeName().location(),
|
|
"Length has to be placed in parentheses after the array type for new expression."
|
|
);
|
|
type = TypeProvider::withLocationIfReference(DataLocation::Memory, type);
|
|
_newExpression.annotation().type = TypeProvider::function(
|
|
TypePointers{TypeProvider::uint256()},
|
|
TypePointers{type},
|
|
strings(1, ""),
|
|
strings(1, ""),
|
|
FunctionType::Kind::ObjectCreation,
|
|
false,
|
|
StateMutability::Pure
|
|
);
|
|
_newExpression.annotation().isPure = true;
|
|
}
|
|
else
|
|
{
|
|
_newExpression.annotation().isPure = false;
|
|
m_errorReporter.fatalTypeError(8807_error, _newExpression.location(), "Contract or array type expected.");
|
|
}
|
|
}
|
|
|
|
bool TypeChecker::visit(MemberAccess const& _memberAccess)
|
|
{
|
|
_memberAccess.expression().accept(*this);
|
|
Type const* exprType = type(_memberAccess.expression());
|
|
ASTString const& memberName = _memberAccess.memberName();
|
|
|
|
auto& annotation = _memberAccess.annotation();
|
|
|
|
// Retrieve the types of the arguments if this is used to call a function.
|
|
auto const& arguments = annotation.arguments;
|
|
MemberList::MemberMap possibleMembers = exprType->members(currentDefinitionScope()).membersByName(memberName);
|
|
size_t const initialMemberCount = possibleMembers.size();
|
|
if (initialMemberCount > 1 && arguments)
|
|
{
|
|
// do overload resolution
|
|
for (auto it = possibleMembers.begin(); it != possibleMembers.end();)
|
|
if (
|
|
it->type->category() == Type::Category::Function &&
|
|
!dynamic_cast<FunctionType const&>(*it->type).canTakeArguments(*arguments, exprType)
|
|
)
|
|
it = possibleMembers.erase(it);
|
|
else
|
|
++it;
|
|
}
|
|
|
|
annotation.isConstant = false;
|
|
|
|
if (possibleMembers.empty())
|
|
{
|
|
if (initialMemberCount == 0 && !dynamic_cast<ArraySliceType const*>(exprType))
|
|
{
|
|
// Try to see if the member was removed because it is only available for storage types.
|
|
auto storageType = TypeProvider::withLocationIfReference(
|
|
DataLocation::Storage,
|
|
exprType
|
|
);
|
|
if (!storageType->members(currentDefinitionScope()).membersByName(memberName).empty())
|
|
m_errorReporter.fatalTypeError(
|
|
4994_error,
|
|
_memberAccess.location(),
|
|
"Member \"" + memberName + "\" is not available in " +
|
|
exprType->toString() +
|
|
" outside of storage."
|
|
);
|
|
}
|
|
|
|
auto [errorId, description] = [&]() -> tuple<ErrorId, string> {
|
|
string errorMsg = "Member \"" + memberName + "\" not found or not visible "
|
|
"after argument-dependent lookup in " + exprType->toString() + ".";
|
|
|
|
if (auto const* funType = dynamic_cast<FunctionType const*>(exprType))
|
|
{
|
|
TypePointers const& t = funType->returnParameterTypes();
|
|
|
|
if (memberName == "value")
|
|
{
|
|
if (funType->kind() == FunctionType::Kind::Creation)
|
|
return {
|
|
8827_error,
|
|
"Constructor for " + t.front()->toString() + " must be payable for member \"value\" to be available."
|
|
};
|
|
else if (
|
|
funType->kind() == FunctionType::Kind::DelegateCall ||
|
|
funType->kind() == FunctionType::Kind::BareDelegateCall
|
|
)
|
|
return { 8477_error, "Member \"value\" is not allowed in delegated calls due to \"msg.value\" persisting." };
|
|
else
|
|
return { 8820_error, "Member \"value\" is only available for payable functions." };
|
|
}
|
|
else if (
|
|
t.size() == 1 && (
|
|
t.front()->category() == Type::Category::Struct ||
|
|
t.front()->category() == Type::Category::Contract
|
|
)
|
|
)
|
|
return { 6005_error, errorMsg + " Did you intend to call the function?" };
|
|
}
|
|
else if (exprType->category() == Type::Category::Contract)
|
|
{
|
|
for (MemberList::Member const& addressMember: TypeProvider::payableAddress()->nativeMembers(nullptr))
|
|
if (addressMember.name == memberName)
|
|
{
|
|
auto const* var = dynamic_cast<Identifier const*>(&_memberAccess.expression());
|
|
string varName = var ? var->name() : "...";
|
|
errorMsg += " Use \"address(" + varName + ")." + memberName + "\" to access this address member.";
|
|
return { 3125_error, errorMsg };
|
|
}
|
|
}
|
|
else if (auto const* addressType = dynamic_cast<AddressType const*>(exprType))
|
|
{
|
|
// Trigger error when using send or transfer with a non-payable fallback function.
|
|
if (memberName == "send" || memberName == "transfer")
|
|
{
|
|
solAssert(
|
|
addressType->stateMutability() != StateMutability::Payable,
|
|
"Expected address not-payable as members were not found"
|
|
);
|
|
|
|
return { 9862_error, "\"send\" and \"transfer\" are only available for objects of type \"address payable\", not \"" + exprType->toString() + "\"." };
|
|
}
|
|
}
|
|
|
|
return { 9582_error, errorMsg };
|
|
}();
|
|
|
|
m_errorReporter.fatalTypeError(
|
|
errorId,
|
|
_memberAccess.location(),
|
|
description
|
|
);
|
|
}
|
|
else if (possibleMembers.size() > 1)
|
|
m_errorReporter.fatalTypeError(
|
|
6675_error,
|
|
_memberAccess.location(),
|
|
"Member \"" + memberName + "\" not unique "
|
|
"after argument-dependent lookup in " + exprType->toString() +
|
|
(memberName == "value" ? " - did you forget the \"payable\" modifier?" : ".")
|
|
);
|
|
|
|
annotation.referencedDeclaration = possibleMembers.front().declaration;
|
|
annotation.type = possibleMembers.front().type;
|
|
|
|
VirtualLookup requiredLookup = VirtualLookup::Static;
|
|
|
|
if (auto funType = dynamic_cast<FunctionType const*>(annotation.type))
|
|
{
|
|
solAssert(
|
|
!funType->bound() || exprType->isImplicitlyConvertibleTo(*funType->selfType()),
|
|
"Function \"" + memberName + "\" cannot be called on an object of type " +
|
|
exprType->toString() + " (expected " + funType->selfType()->toString() + ")."
|
|
);
|
|
|
|
if (
|
|
dynamic_cast<FunctionType const*>(exprType) &&
|
|
!annotation.referencedDeclaration &&
|
|
(memberName == "value" || memberName == "gas")
|
|
)
|
|
m_errorReporter.typeError(
|
|
1621_error,
|
|
_memberAccess.location(),
|
|
"Using \"." + memberName + "(...)\" is deprecated. Use \"{" + memberName + ": ...}\" instead."
|
|
);
|
|
|
|
if (
|
|
funType->kind() == FunctionType::Kind::ArrayPush &&
|
|
arguments.value().numArguments() != 0 &&
|
|
exprType->containsNestedMapping()
|
|
)
|
|
m_errorReporter.typeError(
|
|
8871_error,
|
|
_memberAccess.location(),
|
|
"Storage arrays with nested mappings do not support .push(<arg>)."
|
|
);
|
|
|
|
if (!funType->bound())
|
|
if (auto typeType = dynamic_cast<TypeType const*>(exprType))
|
|
{
|
|
auto contractType = dynamic_cast<ContractType const*>(typeType->actualType());
|
|
if (contractType && contractType->isSuper())
|
|
requiredLookup = VirtualLookup::Super;
|
|
}
|
|
}
|
|
|
|
annotation.requiredLookup = requiredLookup;
|
|
|
|
if (auto const* structType = dynamic_cast<StructType const*>(exprType))
|
|
annotation.isLValue = !structType->dataStoredIn(DataLocation::CallData);
|
|
else if (exprType->category() == Type::Category::Array)
|
|
annotation.isLValue = false;
|
|
else if (exprType->category() == Type::Category::FixedBytes)
|
|
annotation.isLValue = false;
|
|
else if (TypeType const* typeType = dynamic_cast<decltype(typeType)>(exprType))
|
|
{
|
|
if (ContractType const* contractType = dynamic_cast<decltype(contractType)>(typeType->actualType()))
|
|
{
|
|
annotation.isLValue = annotation.referencedDeclaration->isLValue();
|
|
if (
|
|
auto const* functionType = dynamic_cast<FunctionType const*>(annotation.type);
|
|
functionType &&
|
|
functionType->kind() == FunctionType::Kind::Declaration
|
|
)
|
|
annotation.isPure = *_memberAccess.expression().annotation().isPure;
|
|
}
|
|
else
|
|
annotation.isLValue = false;
|
|
}
|
|
else if (exprType->category() == Type::Category::Module)
|
|
{
|
|
annotation.isPure = *_memberAccess.expression().annotation().isPure;
|
|
annotation.isLValue = false;
|
|
}
|
|
else
|
|
annotation.isLValue = false;
|
|
|
|
// TODO some members might be pure, but for example `address(0x123).balance` is not pure
|
|
// although every subexpression is, so leaving this limited for now.
|
|
if (auto tt = dynamic_cast<TypeType const*>(exprType))
|
|
if (tt->actualType()->category() == Type::Category::Enum)
|
|
annotation.isPure = true;
|
|
if (
|
|
auto const* functionType = dynamic_cast<FunctionType const*>(exprType);
|
|
functionType &&
|
|
functionType->hasDeclaration() &&
|
|
dynamic_cast<FunctionDefinition const*>(&functionType->declaration()) &&
|
|
memberName == "selector"
|
|
)
|
|
if (auto const* parentAccess = dynamic_cast<MemberAccess const*>(&_memberAccess.expression()))
|
|
{
|
|
bool isPure = *parentAccess->expression().annotation().isPure;
|
|
if (auto const* exprInt = dynamic_cast<Identifier const*>(&parentAccess->expression()))
|
|
if (exprInt->name() == "this" || exprInt->name() == "super")
|
|
isPure = true;
|
|
|
|
annotation.isPure = isPure;
|
|
}
|
|
|
|
if (auto magicType = dynamic_cast<MagicType const*>(exprType))
|
|
{
|
|
if (magicType->kind() == MagicType::Kind::ABI)
|
|
annotation.isPure = true;
|
|
else if (magicType->kind() == MagicType::Kind::MetaType && (
|
|
memberName == "creationCode" || memberName == "runtimeCode"
|
|
))
|
|
{
|
|
annotation.isPure = true;
|
|
ContractType const& accessedContractType = dynamic_cast<ContractType const&>(*magicType->typeArgument());
|
|
solAssert(!accessedContractType.isSuper(), "");
|
|
if (
|
|
memberName == "runtimeCode" &&
|
|
!accessedContractType.immutableVariables().empty()
|
|
)
|
|
m_errorReporter.typeError(
|
|
9274_error,
|
|
_memberAccess.location(),
|
|
"\"runtimeCode\" is not available for contracts containing immutable variables."
|
|
);
|
|
}
|
|
else if (magicType->kind() == MagicType::Kind::MetaType && memberName == "name")
|
|
annotation.isPure = true;
|
|
else if (magicType->kind() == MagicType::Kind::MetaType && memberName == "interfaceId")
|
|
annotation.isPure = true;
|
|
else if (
|
|
magicType->kind() == MagicType::Kind::MetaType &&
|
|
(memberName == "min" || memberName == "max")
|
|
)
|
|
annotation.isPure = true;
|
|
else if (magicType->kind() == MagicType::Kind::Block && memberName == "chainid" && !m_evmVersion.hasChainID())
|
|
m_errorReporter.typeError(
|
|
3081_error,
|
|
_memberAccess.location(),
|
|
"\"chainid\" is not supported by the VM version."
|
|
);
|
|
}
|
|
|
|
if (
|
|
_memberAccess.expression().annotation().type->category() == Type::Category::Address &&
|
|
memberName == "codehash" &&
|
|
!m_evmVersion.hasExtCodeHash()
|
|
)
|
|
m_errorReporter.typeError(
|
|
7598_error,
|
|
_memberAccess.location(),
|
|
"\"codehash\" is not supported by the VM version."
|
|
);
|
|
|
|
if (!annotation.isPure.set())
|
|
annotation.isPure = false;
|
|
|
|
return false;
|
|
}
|
|
|
|
bool TypeChecker::visit(IndexAccess const& _access)
|
|
{
|
|
_access.annotation().isConstant = false;
|
|
_access.baseExpression().accept(*this);
|
|
Type const* baseType = type(_access.baseExpression());
|
|
Type const* resultType = nullptr;
|
|
bool isLValue = false;
|
|
bool isPure = *_access.baseExpression().annotation().isPure;
|
|
Expression const* index = _access.indexExpression();
|
|
switch (baseType->category())
|
|
{
|
|
case Type::Category::ArraySlice:
|
|
{
|
|
auto const& arrayType = dynamic_cast<ArraySliceType const&>(*baseType).arrayType();
|
|
if (arrayType.location() != DataLocation::CallData || !arrayType.isDynamicallySized())
|
|
m_errorReporter.typeError(4802_error, _access.location(), "Index access is only implemented for slices of dynamic calldata arrays.");
|
|
baseType = &arrayType;
|
|
[[fallthrough]];
|
|
}
|
|
case Type::Category::Array:
|
|
{
|
|
ArrayType const& actualType = dynamic_cast<ArrayType const&>(*baseType);
|
|
if (!index)
|
|
m_errorReporter.typeError(9689_error, _access.location(), "Index expression cannot be omitted.");
|
|
else if (actualType.isString())
|
|
{
|
|
m_errorReporter.typeError(9961_error, _access.location(), "Index access for string is not possible.");
|
|
index->accept(*this);
|
|
}
|
|
else
|
|
{
|
|
expectType(*index, *TypeProvider::uint256());
|
|
if (!m_errorReporter.hasErrors())
|
|
if (auto numberType = dynamic_cast<RationalNumberType const*>(type(*index)))
|
|
{
|
|
solAssert(!numberType->isFractional(), "");
|
|
if (!actualType.isDynamicallySized() && actualType.length() <= numberType->literalValue(nullptr))
|
|
m_errorReporter.typeError(3383_error, _access.location(), "Out of bounds array access.");
|
|
}
|
|
}
|
|
resultType = actualType.baseType();
|
|
isLValue = actualType.location() != DataLocation::CallData;
|
|
break;
|
|
}
|
|
case Type::Category::Mapping:
|
|
{
|
|
MappingType const& actualType = dynamic_cast<MappingType const&>(*baseType);
|
|
if (!index)
|
|
m_errorReporter.typeError(1267_error, _access.location(), "Index expression cannot be omitted.");
|
|
else
|
|
expectType(*index, *actualType.keyType());
|
|
resultType = actualType.valueType();
|
|
isLValue = true;
|
|
break;
|
|
}
|
|
case Type::Category::TypeType:
|
|
{
|
|
TypeType const& typeType = dynamic_cast<TypeType const&>(*baseType);
|
|
if (auto const* contractType = dynamic_cast<ContractType const*>(typeType.actualType()))
|
|
if (contractType->contractDefinition().isLibrary())
|
|
m_errorReporter.typeError(2876_error, _access.location(), "Index access for library types and arrays of libraries are not possible.");
|
|
if (!index)
|
|
resultType = TypeProvider::typeType(TypeProvider::array(DataLocation::Memory, typeType.actualType()));
|
|
else
|
|
{
|
|
u256 length = 1;
|
|
if (expectType(*index, *TypeProvider::uint256()))
|
|
{
|
|
if (auto indexValue = dynamic_cast<RationalNumberType const*>(type(*index)))
|
|
length = indexValue->literalValue(nullptr);
|
|
else
|
|
m_errorReporter.fatalTypeError(3940_error, index->location(), "Integer constant expected.");
|
|
}
|
|
else
|
|
solAssert(m_errorReporter.hasErrors(), "Expected errors as expectType returned false");
|
|
|
|
resultType = TypeProvider::typeType(TypeProvider::array(
|
|
DataLocation::Memory,
|
|
typeType.actualType(),
|
|
length
|
|
));
|
|
}
|
|
break;
|
|
}
|
|
case Type::Category::FixedBytes:
|
|
{
|
|
FixedBytesType const& bytesType = dynamic_cast<FixedBytesType const&>(*baseType);
|
|
if (!index)
|
|
m_errorReporter.typeError(8830_error, _access.location(), "Index expression cannot be omitted.");
|
|
else
|
|
{
|
|
if (!expectType(*index, *TypeProvider::uint256()))
|
|
m_errorReporter.fatalTypeError(6318_error, _access.location(), "Index expression cannot be represented as an unsigned integer.");
|
|
if (auto integerType = dynamic_cast<RationalNumberType const*>(type(*index)))
|
|
if (bytesType.numBytes() <= integerType->literalValue(nullptr))
|
|
m_errorReporter.typeError(1859_error, _access.location(), "Out of bounds array access.");
|
|
}
|
|
resultType = TypeProvider::fixedBytes(1);
|
|
isLValue = false; // @todo this heavily depends on how it is embedded
|
|
break;
|
|
}
|
|
default:
|
|
m_errorReporter.fatalTypeError(
|
|
2614_error,
|
|
_access.baseExpression().location(),
|
|
"Indexed expression has to be a type, mapping or array (is " + baseType->toString() + ")"
|
|
);
|
|
}
|
|
_access.annotation().type = resultType;
|
|
_access.annotation().isLValue = isLValue;
|
|
if (index && !*index->annotation().isPure)
|
|
isPure = false;
|
|
_access.annotation().isPure = isPure;
|
|
|
|
return false;
|
|
}
|
|
|
|
bool TypeChecker::visit(IndexRangeAccess const& _access)
|
|
{
|
|
_access.annotation().isConstant = false;
|
|
_access.baseExpression().accept(*this);
|
|
|
|
bool isLValue = false; // TODO: set this correctly when implementing slices for memory and storage arrays
|
|
bool isPure = *_access.baseExpression().annotation().isPure;
|
|
|
|
if (Expression const* start = _access.startExpression())
|
|
{
|
|
expectType(*start, *TypeProvider::uint256());
|
|
if (!*start->annotation().isPure)
|
|
isPure = false;
|
|
}
|
|
if (Expression const* end = _access.endExpression())
|
|
{
|
|
expectType(*end, *TypeProvider::uint256());
|
|
if (!*end->annotation().isPure)
|
|
isPure = false;
|
|
}
|
|
|
|
_access.annotation().isLValue = isLValue;
|
|
_access.annotation().isPure = isPure;
|
|
|
|
Type const* exprType = type(_access.baseExpression());
|
|
if (exprType->category() == Type::Category::TypeType)
|
|
{
|
|
m_errorReporter.typeError(1760_error, _access.location(), "Types cannot be sliced.");
|
|
_access.annotation().type = exprType;
|
|
return false;
|
|
}
|
|
|
|
ArrayType const* arrayType = nullptr;
|
|
if (auto const* arraySlice = dynamic_cast<ArraySliceType const*>(exprType))
|
|
arrayType = &arraySlice->arrayType();
|
|
else if (!(arrayType = dynamic_cast<ArrayType const*>(exprType)))
|
|
m_errorReporter.fatalTypeError(4781_error, _access.location(), "Index range access is only possible for arrays and array slices.");
|
|
|
|
if (arrayType->location() != DataLocation::CallData || !arrayType->isDynamicallySized())
|
|
m_errorReporter.typeError(1227_error, _access.location(), "Index range access is only supported for dynamic calldata arrays.");
|
|
else if (arrayType->baseType()->isDynamicallyEncoded())
|
|
m_errorReporter.typeError(2148_error, _access.location(), "Index range access is not supported for arrays with dynamically encoded base types.");
|
|
_access.annotation().type = TypeProvider::arraySlice(*arrayType);
|
|
|
|
return false;
|
|
}
|
|
|
|
vector<Declaration const*> TypeChecker::cleanOverloadedDeclarations(
|
|
Identifier const& _identifier,
|
|
vector<Declaration const*> const& _candidates
|
|
)
|
|
{
|
|
solAssert(_candidates.size() > 1, "");
|
|
vector<Declaration const*> uniqueDeclarations;
|
|
|
|
for (Declaration const* declaration: _candidates)
|
|
{
|
|
solAssert(declaration, "");
|
|
// the declaration is functionDefinition, eventDefinition or a VariableDeclaration while declarations > 1
|
|
solAssert(
|
|
dynamic_cast<FunctionDefinition const*>(declaration) ||
|
|
dynamic_cast<EventDefinition const*>(declaration) ||
|
|
dynamic_cast<VariableDeclaration const*>(declaration) ||
|
|
dynamic_cast<MagicVariableDeclaration const*>(declaration),
|
|
"Found overloading involving something not a function, event or a (magic) variable."
|
|
);
|
|
|
|
FunctionTypePointer functionType {declaration->functionType(false)};
|
|
if (!functionType)
|
|
functionType = declaration->functionType(true);
|
|
solAssert(functionType, "Failed to determine the function type of the overloaded.");
|
|
|
|
for (Type const* parameter: functionType->parameterTypes() + functionType->returnParameterTypes())
|
|
if (!parameter)
|
|
m_errorReporter.fatalDeclarationError(3893_error, _identifier.location(), "Function type can not be used in this context.");
|
|
|
|
if (uniqueDeclarations.end() == find_if(
|
|
uniqueDeclarations.begin(),
|
|
uniqueDeclarations.end(),
|
|
[&](Declaration const* d)
|
|
{
|
|
FunctionType const* newFunctionType = d->functionType(false);
|
|
if (!newFunctionType)
|
|
newFunctionType = d->functionType(true);
|
|
return newFunctionType && functionType->hasEqualParameterTypes(*newFunctionType);
|
|
}
|
|
))
|
|
uniqueDeclarations.push_back(declaration);
|
|
}
|
|
return uniqueDeclarations;
|
|
}
|
|
|
|
bool TypeChecker::visit(Identifier const& _identifier)
|
|
{
|
|
IdentifierAnnotation& annotation = _identifier.annotation();
|
|
|
|
if (!annotation.referencedDeclaration)
|
|
{
|
|
annotation.overloadedDeclarations = cleanOverloadedDeclarations(_identifier, annotation.candidateDeclarations);
|
|
if (annotation.overloadedDeclarations.empty())
|
|
m_errorReporter.fatalTypeError(7593_error, _identifier.location(), "No candidates for overload resolution found.");
|
|
else if (annotation.overloadedDeclarations.size() == 1)
|
|
annotation.referencedDeclaration = *annotation.overloadedDeclarations.begin();
|
|
else if (!annotation.arguments)
|
|
{
|
|
// The identifier should be a public state variable shadowing other functions
|
|
vector<Declaration const*> candidates;
|
|
|
|
for (Declaration const* declaration: annotation.overloadedDeclarations)
|
|
{
|
|
if (VariableDeclaration const* variableDeclaration = dynamic_cast<decltype(variableDeclaration)>(declaration))
|
|
candidates.push_back(declaration);
|
|
}
|
|
if (candidates.empty())
|
|
m_errorReporter.fatalTypeError(2144_error, _identifier.location(), "No matching declaration found after variable lookup.");
|
|
else if (candidates.size() == 1)
|
|
annotation.referencedDeclaration = candidates.front();
|
|
else
|
|
m_errorReporter.fatalTypeError(7589_error, _identifier.location(), "No unique declaration found after variable lookup.");
|
|
}
|
|
else
|
|
{
|
|
vector<Declaration const*> candidates;
|
|
|
|
for (Declaration const* declaration: annotation.overloadedDeclarations)
|
|
{
|
|
FunctionTypePointer functionType = declaration->functionType(true);
|
|
solAssert(!!functionType, "Requested type not present.");
|
|
if (functionType->canTakeArguments(*annotation.arguments))
|
|
candidates.push_back(declaration);
|
|
}
|
|
if (candidates.size() == 1)
|
|
annotation.referencedDeclaration = candidates.front();
|
|
else
|
|
{
|
|
SecondarySourceLocation ssl;
|
|
|
|
for (Declaration const* declaration: annotation.overloadedDeclarations)
|
|
if (!declaration->location().isValid())
|
|
{
|
|
// Try to re-construct function definition
|
|
string description;
|
|
for (auto const& param: declaration->functionType(true)->parameterTypes())
|
|
description += (description.empty() ? "" : ", ") + param->toString(false);
|
|
description = "function " + _identifier.name() + "(" + description + ")";
|
|
|
|
ssl.append("Candidate: " + description, declaration->location());
|
|
}
|
|
else
|
|
ssl.append("Candidate:", declaration->location());
|
|
if (candidates.empty())
|
|
m_errorReporter.fatalTypeError(9322_error, _identifier.location(), ssl, "No matching declaration found after argument-dependent lookup.");
|
|
else
|
|
m_errorReporter.fatalTypeError(4487_error, _identifier.location(), ssl, "No unique declaration found after argument-dependent lookup.");
|
|
}
|
|
}
|
|
}
|
|
solAssert(
|
|
!!annotation.referencedDeclaration,
|
|
"Referenced declaration is null after overload resolution."
|
|
);
|
|
bool isConstant = false;
|
|
annotation.isLValue = annotation.referencedDeclaration->isLValue();
|
|
annotation.type = annotation.referencedDeclaration->type();
|
|
solAssert(annotation.type, "Declaration referenced before type could be determined.");
|
|
if (auto variableDeclaration = dynamic_cast<VariableDeclaration const*>(annotation.referencedDeclaration))
|
|
annotation.isPure = isConstant = variableDeclaration->isConstant();
|
|
else if (dynamic_cast<MagicVariableDeclaration const*>(annotation.referencedDeclaration))
|
|
annotation.isPure = dynamic_cast<FunctionType const*>(annotation.type);
|
|
else if (dynamic_cast<TypeType const*>(annotation.type))
|
|
annotation.isPure = true;
|
|
else if (dynamic_cast<ModuleType const*>(annotation.type))
|
|
annotation.isPure = true;
|
|
else
|
|
annotation.isPure = false;
|
|
|
|
annotation.isConstant = isConstant;
|
|
|
|
annotation.requiredLookup =
|
|
dynamic_cast<CallableDeclaration const*>(annotation.referencedDeclaration) ?
|
|
VirtualLookup::Virtual : VirtualLookup::Static;
|
|
|
|
// Check for deprecated function names.
|
|
// The check is done here for the case without an actual function call.
|
|
if (FunctionType const* fType = dynamic_cast<FunctionType const*>(_identifier.annotation().type))
|
|
{
|
|
if (_identifier.name() == "sha3" && fType->kind() == FunctionType::Kind::KECCAK256)
|
|
m_errorReporter.typeError(
|
|
3557_error,
|
|
_identifier.location(),
|
|
"\"sha3\" has been deprecated in favour of \"keccak256\"."
|
|
);
|
|
else if (_identifier.name() == "suicide" && fType->kind() == FunctionType::Kind::Selfdestruct)
|
|
m_errorReporter.typeError(
|
|
8050_error,
|
|
_identifier.location(),
|
|
"\"suicide\" has been deprecated in favour of \"selfdestruct\"."
|
|
);
|
|
}
|
|
|
|
if (
|
|
MagicVariableDeclaration const* magicVar =
|
|
dynamic_cast<MagicVariableDeclaration const*>(annotation.referencedDeclaration)
|
|
)
|
|
if (magicVar->type()->category() == Type::Category::Integer)
|
|
{
|
|
solAssert(_identifier.name() == "now", "");
|
|
m_errorReporter.typeError(
|
|
7359_error,
|
|
_identifier.location(),
|
|
"\"now\" has been deprecated. Use \"block.timestamp\" instead."
|
|
);
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
void TypeChecker::endVisit(IdentifierPath const& _identifierPath)
|
|
{
|
|
if (
|
|
dynamic_cast<CallableDeclaration const*>(_identifierPath.annotation().referencedDeclaration) &&
|
|
_identifierPath.path().size() == 1
|
|
)
|
|
_identifierPath.annotation().requiredLookup = VirtualLookup::Virtual;
|
|
else
|
|
_identifierPath.annotation().requiredLookup = VirtualLookup::Static;
|
|
}
|
|
|
|
void TypeChecker::endVisit(UserDefinedTypeName const& _userDefinedTypeName)
|
|
{
|
|
if (!_userDefinedTypeName.annotation().type)
|
|
_userDefinedTypeName.annotation().type = _userDefinedTypeName.pathNode().annotation().referencedDeclaration->type();
|
|
}
|
|
|
|
void TypeChecker::endVisit(ElementaryTypeNameExpression const& _expr)
|
|
{
|
|
_expr.annotation().type = TypeProvider::typeType(TypeProvider::fromElementaryTypeName(_expr.type().typeName(), _expr.type().stateMutability()));
|
|
_expr.annotation().isPure = true;
|
|
_expr.annotation().isLValue = false;
|
|
_expr.annotation().isConstant = false;
|
|
}
|
|
|
|
void TypeChecker::endVisit(Literal const& _literal)
|
|
{
|
|
if (_literal.looksLikeAddress())
|
|
{
|
|
// Assign type here if it even looks like an address. This prevents double errors for invalid addresses
|
|
_literal.annotation().type = TypeProvider::address();
|
|
|
|
string msg;
|
|
if (_literal.valueWithoutUnderscores().length() != 42) // "0x" + 40 hex digits
|
|
// looksLikeAddress enforces that it is a hex literal starting with "0x"
|
|
msg =
|
|
"This looks like an address but is not exactly 40 hex digits. It is " +
|
|
to_string(_literal.valueWithoutUnderscores().length() - 2) +
|
|
" hex digits.";
|
|
else if (!_literal.passesAddressChecksum())
|
|
{
|
|
msg = "This looks like an address but has an invalid checksum.";
|
|
if (!_literal.getChecksummedAddress().empty())
|
|
msg += " Correct checksummed address: \"" + _literal.getChecksummedAddress() + "\".";
|
|
}
|
|
|
|
if (!msg.empty())
|
|
m_errorReporter.syntaxError(
|
|
9429_error,
|
|
_literal.location(),
|
|
msg +
|
|
" If this is not used as an address, please prepend '00'. " +
|
|
"For more information please see https://docs.soliditylang.org/en/develop/types.html#address-literals"
|
|
);
|
|
}
|
|
|
|
if (_literal.isHexNumber() && _literal.subDenomination() != Literal::SubDenomination::None)
|
|
m_errorReporter.fatalTypeError(
|
|
5145_error,
|
|
_literal.location(),
|
|
"Hexadecimal numbers cannot be used with unit denominations. "
|
|
"You can use an expression of the form \"0x1234 * 1 day\" instead."
|
|
);
|
|
|
|
if (_literal.subDenomination() == Literal::SubDenomination::Year)
|
|
m_errorReporter.typeError(
|
|
4820_error,
|
|
_literal.location(),
|
|
"Using \"years\" as a unit denomination is deprecated."
|
|
);
|
|
|
|
if (!_literal.annotation().type)
|
|
_literal.annotation().type = TypeProvider::forLiteral(_literal);
|
|
|
|
if (!_literal.annotation().type)
|
|
m_errorReporter.fatalTypeError(2826_error, _literal.location(), "Invalid literal value.");
|
|
|
|
_literal.annotation().isPure = true;
|
|
_literal.annotation().isLValue = false;
|
|
_literal.annotation().isConstant = false;
|
|
}
|
|
|
|
void TypeChecker::endVisit(UsingForDirective const& _usingFor)
|
|
{
|
|
if (m_currentContract->isInterface())
|
|
m_errorReporter.typeError(
|
|
9088_error,
|
|
_usingFor.location(),
|
|
"The \"using for\" directive is not allowed inside interfaces."
|
|
);
|
|
}
|
|
|
|
void TypeChecker::checkErrorAndEventParameters(CallableDeclaration const& _callable)
|
|
{
|
|
string kind = dynamic_cast<EventDefinition const*>(&_callable) ? "event" : "error";
|
|
for (ASTPointer<VariableDeclaration> const& var: _callable.parameters())
|
|
{
|
|
if (type(*var)->containsNestedMapping())
|
|
m_errorReporter.typeError(
|
|
3448_error,
|
|
var->location(),
|
|
"Type containing a (nested) mapping is not allowed as " + kind + " parameter type."
|
|
);
|
|
if (!type(*var)->interfaceType(false))
|
|
m_errorReporter.typeError(3417_error, var->location(), "Internal or recursive type is not allowed as " + kind + " parameter type.");
|
|
if (
|
|
!useABICoderV2() &&
|
|
!typeSupportedByOldABIEncoder(*type(*var), false /* isLibrary */)
|
|
)
|
|
m_errorReporter.typeError(
|
|
3061_error,
|
|
var->location(),
|
|
"This type is only supported in ABI coder v2. "
|
|
"Use \"pragma abicoder v2;\" to enable the feature."
|
|
);
|
|
}
|
|
}
|
|
|
|
Declaration const& TypeChecker::dereference(Identifier const& _identifier) const
|
|
{
|
|
solAssert(!!_identifier.annotation().referencedDeclaration, "Declaration not stored.");
|
|
return *_identifier.annotation().referencedDeclaration;
|
|
}
|
|
|
|
Declaration const& TypeChecker::dereference(IdentifierPath const& _path) const
|
|
{
|
|
solAssert(!!_path.annotation().referencedDeclaration, "Declaration not stored.");
|
|
return *_path.annotation().referencedDeclaration;
|
|
}
|
|
|
|
bool TypeChecker::expectType(Expression const& _expression, Type const& _expectedType)
|
|
{
|
|
_expression.accept(*this);
|
|
BoolResult result = type(_expression)->isImplicitlyConvertibleTo(_expectedType);
|
|
if (!result)
|
|
{
|
|
auto errorMsg = "Type " +
|
|
type(_expression)->toString() +
|
|
" is not implicitly convertible to expected type " +
|
|
_expectedType.toString();
|
|
if (
|
|
type(_expression)->category() == Type::Category::RationalNumber &&
|
|
dynamic_cast<RationalNumberType const*>(type(_expression))->isFractional() &&
|
|
type(_expression)->mobileType()
|
|
)
|
|
{
|
|
if (_expectedType.operator==(*type(_expression)->mobileType()))
|
|
m_errorReporter.typeError(
|
|
4426_error,
|
|
_expression.location(),
|
|
errorMsg + ", but it can be explicitly converted."
|
|
);
|
|
else
|
|
m_errorReporter.typeErrorConcatenateDescriptions(
|
|
2326_error,
|
|
_expression.location(),
|
|
errorMsg +
|
|
". Try converting to type " +
|
|
type(_expression)->mobileType()->toString() +
|
|
" or use an explicit conversion.",
|
|
result.message()
|
|
);
|
|
}
|
|
else
|
|
m_errorReporter.typeErrorConcatenateDescriptions(
|
|
7407_error,
|
|
_expression.location(),
|
|
errorMsg + ".",
|
|
result.message()
|
|
);
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
void TypeChecker::requireLValue(Expression const& _expression, bool _ordinaryAssignment)
|
|
{
|
|
_expression.annotation().willBeWrittenTo = true;
|
|
_expression.annotation().lValueOfOrdinaryAssignment = _ordinaryAssignment;
|
|
_expression.accept(*this);
|
|
|
|
if (*_expression.annotation().isLValue)
|
|
return;
|
|
|
|
auto [errorId, description] = [&]() -> tuple<ErrorId, string> {
|
|
if (*_expression.annotation().isConstant)
|
|
return { 6520_error, "Cannot assign to a constant variable." };
|
|
|
|
if (auto indexAccess = dynamic_cast<IndexAccess const*>(&_expression))
|
|
{
|
|
if (type(indexAccess->baseExpression())->category() == Type::Category::FixedBytes)
|
|
return { 4360_error, "Single bytes in fixed bytes arrays cannot be modified." };
|
|
else if (auto arrayType = dynamic_cast<ArrayType const*>(type(indexAccess->baseExpression())))
|
|
if (arrayType->dataStoredIn(DataLocation::CallData))
|
|
return { 6182_error, "Calldata arrays are read-only." };
|
|
}
|
|
|
|
if (auto memberAccess = dynamic_cast<MemberAccess const*>(&_expression))
|
|
{
|
|
if (auto structType = dynamic_cast<StructType const*>(type(memberAccess->expression())))
|
|
{
|
|
if (structType->dataStoredIn(DataLocation::CallData))
|
|
return { 4156_error, "Calldata structs are read-only." };
|
|
}
|
|
else if (dynamic_cast<ArrayType const*>(type(memberAccess->expression())))
|
|
if (memberAccess->memberName() == "length")
|
|
return { 7567_error, "Member \"length\" is read-only and cannot be used to resize arrays." };
|
|
}
|
|
|
|
if (auto identifier = dynamic_cast<Identifier const*>(&_expression))
|
|
if (auto varDecl = dynamic_cast<VariableDeclaration const*>(identifier->annotation().referencedDeclaration))
|
|
if (varDecl->isExternalCallableParameter() && dynamic_cast<ReferenceType const*>(identifier->annotation().type))
|
|
return { 7128_error, "External function arguments of reference type are read-only." };
|
|
|
|
return { 4247_error, "Expression has to be an lvalue." };
|
|
}();
|
|
|
|
m_errorReporter.typeError(errorId, _expression.location(), description);
|
|
}
|
|
|
|
bool TypeChecker::useABICoderV2() const
|
|
{
|
|
solAssert(m_currentSourceUnit, "");
|
|
if (m_currentContract)
|
|
solAssert(m_currentSourceUnit == &m_currentContract->sourceUnit(), "");
|
|
return *m_currentSourceUnit->annotation().useABICoderV2;
|
|
|
|
}
|