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Diffstat (limited to 'src/Types.cpp')
| -rw-r--r-- | src/Types.cpp | 1758 |
1 files changed, 1758 insertions, 0 deletions
diff --git a/src/Types.cpp b/src/Types.cpp new file mode 100644 index 00000000..bda68356 --- /dev/null +++ b/src/Types.cpp @@ -0,0 +1,1758 @@ +/* + This file is part of cpp-ethereum. + + cpp-ethereum is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + cpp-ethereum is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>. +*/ +/** + * @author Christian <c@ethdev.com> + * @date 2014 + * Solidity data types + */ + +#include <libsolidity/Types.h> +#include <limits> +#include <boost/range/adaptor/reversed.hpp> +#include <libdevcore/CommonIO.h> +#include <libdevcore/CommonData.h> +#include <libdevcore/SHA3.h> +#include <libsolidity/Utils.h> +#include <libsolidity/AST.h> + +using namespace std; +using namespace dev; +using namespace dev::solidity; + +void StorageOffsets::computeOffsets(TypePointers const& _types) +{ + bigint slotOffset = 0; + unsigned byteOffset = 0; + map<size_t, pair<u256, unsigned>> offsets; + for (size_t i = 0; i < _types.size(); ++i) + { + TypePointer const& type = _types[i]; + if (!type->canBeStored()) + continue; + if (byteOffset + type->getStorageBytes() > 32) + { + // would overflow, go to next slot + ++slotOffset; + byteOffset = 0; + } + if (slotOffset >= bigint(1) << 256) + BOOST_THROW_EXCEPTION(TypeError() << errinfo_comment("Object too large for storage.")); + offsets[i] = make_pair(u256(slotOffset), byteOffset); + solAssert(type->getStorageSize() >= 1, "Invalid storage size."); + if (type->getStorageSize() == 1 && byteOffset + type->getStorageBytes() <= 32) + byteOffset += type->getStorageBytes(); + else + { + slotOffset += type->getStorageSize(); + byteOffset = 0; + } + } + if (byteOffset > 0) + ++slotOffset; + if (slotOffset >= bigint(1) << 256) + BOOST_THROW_EXCEPTION(TypeError() << errinfo_comment("Object too large for storage.")); + m_storageSize = u256(slotOffset); + swap(m_offsets, offsets); +} + +pair<u256, unsigned> const* StorageOffsets::getOffset(size_t _index) const +{ + if (m_offsets.count(_index)) + return &m_offsets.at(_index); + else + return nullptr; +} + +MemberList& MemberList::operator=(MemberList&& _other) +{ + assert(&_other != this); + + m_memberTypes = std::move(_other.m_memberTypes); + m_storageOffsets = std::move(_other.m_storageOffsets); + return *this; +} + +std::pair<u256, unsigned> const* MemberList::getMemberStorageOffset(string const& _name) const +{ + if (!m_storageOffsets) + { + TypePointers memberTypes; + memberTypes.reserve(m_memberTypes.size()); + for (auto const& member: m_memberTypes) + memberTypes.push_back(member.type); + m_storageOffsets.reset(new StorageOffsets()); + m_storageOffsets->computeOffsets(memberTypes); + } + for (size_t index = 0; index < m_memberTypes.size(); ++index) + if (m_memberTypes[index].name == _name) + return m_storageOffsets->getOffset(index); + return nullptr; +} + +u256 const& MemberList::getStorageSize() const +{ + // trigger lazy computation + getMemberStorageOffset(""); + return m_storageOffsets->getStorageSize(); +} + +TypePointer Type::fromElementaryTypeName(Token::Value _typeToken) +{ + char const* tokenCstr = Token::toString(_typeToken); + solAssert(Token::isElementaryTypeName(_typeToken), + "Expected an elementary type name but got " + ((tokenCstr) ? std::string(Token::toString(_typeToken)) : "")); + + if (Token::Int <= _typeToken && _typeToken <= Token::Bytes32) + { + int offset = _typeToken - Token::Int; + int bytes = offset % 33; + if (bytes == 0 && _typeToken != Token::Bytes1) + bytes = 32; + int modifier = offset / 33; + switch(modifier) + { + case 0: + return make_shared<IntegerType>(bytes * 8, IntegerType::Modifier::Signed); + case 1: + return make_shared<IntegerType>(bytes * 8, IntegerType::Modifier::Unsigned); + case 2: + return make_shared<FixedBytesType>(bytes + 1); + default: + solAssert(false, "Unexpected modifier value. Should never happen"); + return TypePointer(); + } + } + else if (_typeToken == Token::Byte) + return make_shared<FixedBytesType>(1); + else if (_typeToken == Token::Address) + return make_shared<IntegerType>(0, IntegerType::Modifier::Address); + else if (_typeToken == Token::Bool) + return make_shared<BoolType>(); + else if (_typeToken == Token::Bytes) + return make_shared<ArrayType>(DataLocation::Storage); + else if (_typeToken == Token::String) + return make_shared<ArrayType>(DataLocation::Storage, true); + else + BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment( + "Unable to convert elementary typename " + std::string(Token::toString(_typeToken)) + " to type." + )); +} + +TypePointer Type::fromElementaryTypeName(string const& _name) +{ + return fromElementaryTypeName(Token::fromIdentifierOrKeyword(_name)); +} + +TypePointer Type::fromUserDefinedTypeName(UserDefinedTypeName const& _typeName) +{ + Declaration const* declaration = _typeName.getReferencedDeclaration(); + if (StructDefinition const* structDef = dynamic_cast<StructDefinition const*>(declaration)) + return make_shared<StructType>(*structDef); + else if (EnumDefinition const* enumDef = dynamic_cast<EnumDefinition const*>(declaration)) + return make_shared<EnumType>(*enumDef); + else if (FunctionDefinition const* function = dynamic_cast<FunctionDefinition const*>(declaration)) + return make_shared<FunctionType>(*function); + else if (ContractDefinition const* contract = dynamic_cast<ContractDefinition const*>(declaration)) + return make_shared<ContractType>(*contract); + return TypePointer(); +} + +TypePointer Type::fromMapping(ElementaryTypeName& _keyType, TypeName& _valueType) +{ + TypePointer keyType = _keyType.toType(); + if (!keyType) + BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Error resolving type name.")); + TypePointer valueType = _valueType.toType(); + if (!valueType) + BOOST_THROW_EXCEPTION(_valueType.createTypeError("Invalid type name.")); + // Convert value type to storage reference. + valueType = ReferenceType::copyForLocationIfReference(DataLocation::Storage, valueType); + // Convert key type to memory. + keyType = ReferenceType::copyForLocationIfReference(DataLocation::Memory, keyType); + return make_shared<MappingType>(keyType, valueType); +} + +TypePointer Type::fromArrayTypeName(TypeName& _baseTypeName, Expression* _length) +{ + TypePointer baseType = _baseTypeName.toType(); + if (!baseType) + BOOST_THROW_EXCEPTION(_baseTypeName.createTypeError("Invalid type name.")); + if (baseType->getStorageBytes() == 0) + BOOST_THROW_EXCEPTION(_baseTypeName.createTypeError("Illegal base type of storage size zero for array.")); + if (_length) + { + if (!_length->getType()) + _length->checkTypeRequirements(nullptr); + auto const* length = dynamic_cast<IntegerConstantType const*>(_length->getType().get()); + if (!length) + BOOST_THROW_EXCEPTION(_length->createTypeError("Invalid array length.")); + return make_shared<ArrayType>(DataLocation::Storage, baseType, length->literalValue(nullptr)); + } + else + return make_shared<ArrayType>(DataLocation::Storage, baseType); +} + +TypePointer Type::forLiteral(Literal const& _literal) +{ + switch (_literal.getToken()) + { + case Token::TrueLiteral: + case Token::FalseLiteral: + return make_shared<BoolType>(); + case Token::Number: + if (!IntegerConstantType::isValidLiteral(_literal)) + return TypePointer(); + return make_shared<IntegerConstantType>(_literal); + case Token::StringLiteral: + return make_shared<StringLiteralType>(_literal); + default: + return shared_ptr<Type>(); + } +} + +TypePointer Type::commonType(TypePointer const& _a, TypePointer const& _b) +{ + if (_b->isImplicitlyConvertibleTo(*_a)) + return _a; + else if (_a->isImplicitlyConvertibleTo(*_b)) + return _b; + else + return TypePointer(); +} + +const MemberList Type::EmptyMemberList; + +IntegerType::IntegerType(int _bits, IntegerType::Modifier _modifier): + m_bits(_bits), m_modifier(_modifier) +{ + if (isAddress()) + m_bits = 160; + solAssert(m_bits > 0 && m_bits <= 256 && m_bits % 8 == 0, + "Invalid bit number for integer type: " + dev::toString(_bits)); +} + +bool IntegerType::isImplicitlyConvertibleTo(Type const& _convertTo) const +{ + if (_convertTo.getCategory() != getCategory()) + return false; + IntegerType const& convertTo = dynamic_cast<IntegerType const&>(_convertTo); + if (convertTo.m_bits < m_bits) + return false; + if (isAddress()) + return convertTo.isAddress(); + else if (isSigned()) + return convertTo.isSigned(); + else + return !convertTo.isSigned() || convertTo.m_bits > m_bits; +} + +bool IntegerType::isExplicitlyConvertibleTo(Type const& _convertTo) const +{ + return _convertTo.getCategory() == getCategory() || + _convertTo.getCategory() == Category::Contract || + _convertTo.getCategory() == Category::Enum || + _convertTo.getCategory() == Category::FixedBytes; +} + +TypePointer IntegerType::unaryOperatorResult(Token::Value _operator) const +{ + // "delete" is ok for all integer types + if (_operator == Token::Delete) + return make_shared<VoidType>(); + // no further unary operators for addresses + else if (isAddress()) + return TypePointer(); + // for non-address integers, we allow +, -, ++ and -- + else if (_operator == Token::Add || _operator == Token::Sub || + _operator == Token::Inc || _operator == Token::Dec || + _operator == Token::After || _operator == Token::BitNot) + return shared_from_this(); + else + return TypePointer(); +} + +bool IntegerType::operator==(Type const& _other) const +{ + if (_other.getCategory() != getCategory()) + return false; + IntegerType const& other = dynamic_cast<IntegerType const&>(_other); + return other.m_bits == m_bits && other.m_modifier == m_modifier; +} + +string IntegerType::toString(bool) const +{ + if (isAddress()) + return "address"; + string prefix = isSigned() ? "int" : "uint"; + return prefix + dev::toString(m_bits); +} + +TypePointer IntegerType::binaryOperatorResult(Token::Value _operator, TypePointer const& _other) const +{ + if (_other->getCategory() != Category::IntegerConstant && _other->getCategory() != getCategory()) + return TypePointer(); + auto commonType = dynamic_pointer_cast<IntegerType const>(Type::commonType(shared_from_this(), _other)); + + if (!commonType) + return TypePointer(); + + // All integer types can be compared + if (Token::isCompareOp(_operator)) + return commonType; + if (Token::isBooleanOp(_operator)) + return TypePointer(); + // Nothing else can be done with addresses + if (commonType->isAddress()) + return TypePointer(); + + return commonType; +} + +const MemberList IntegerType::AddressMemberList({ + {"balance", make_shared<IntegerType >(256)}, + {"call", make_shared<FunctionType>(strings(), strings{"bool"}, FunctionType::Location::Bare, true)}, + {"callcode", make_shared<FunctionType>(strings(), strings{"bool"}, FunctionType::Location::BareCallCode, true)}, + {"send", make_shared<FunctionType>(strings{"uint"}, strings{"bool"}, FunctionType::Location::Send)} +}); + +bool IntegerConstantType::isValidLiteral(const Literal& _literal) +{ + try + { + bigint x(_literal.getValue()); + } + catch (...) + { + return false; + } + return true; +} + +IntegerConstantType::IntegerConstantType(Literal const& _literal) +{ + m_value = bigint(_literal.getValue()); + + switch (_literal.getSubDenomination()) + { + case Literal::SubDenomination::Wei: + case Literal::SubDenomination::Second: + case Literal::SubDenomination::None: + break; + case Literal::SubDenomination::Szabo: + m_value *= bigint("1000000000000"); + break; + case Literal::SubDenomination::Finney: + m_value *= bigint("1000000000000000"); + break; + case Literal::SubDenomination::Ether: + m_value *= bigint("1000000000000000000"); + break; + case Literal::SubDenomination::Minute: + m_value *= bigint("60"); + break; + case Literal::SubDenomination::Hour: + m_value *= bigint("3600"); + break; + case Literal::SubDenomination::Day: + m_value *= bigint("86400"); + break; + case Literal::SubDenomination::Week: + m_value *= bigint("604800"); + break; + case Literal::SubDenomination::Year: + m_value *= bigint("31536000"); + break; + } +} + +bool IntegerConstantType::isImplicitlyConvertibleTo(Type const& _convertTo) const +{ + if (auto targetType = dynamic_cast<IntegerType const*>(&_convertTo)) + { + if (m_value == 0) + return true; + int forSignBit = (targetType->isSigned() ? 1 : 0); + if (m_value > 0) + { + if (m_value <= (u256(-1) >> (256 - targetType->getNumBits() + forSignBit))) + return true; + } + else if (targetType->isSigned() && -m_value <= (u256(1) << (targetType->getNumBits() - forSignBit))) + return true; + return false; + } + else if (_convertTo.getCategory() == Category::FixedBytes) + { + FixedBytesType const& fixedBytes = dynamic_cast<FixedBytesType const&>(_convertTo); + return fixedBytes.numBytes() * 8 >= getIntegerType()->getNumBits(); + } + else + return false; +} + +bool IntegerConstantType::isExplicitlyConvertibleTo(Type const& _convertTo) const +{ + TypePointer integerType = getIntegerType(); + return integerType && integerType->isExplicitlyConvertibleTo(_convertTo); +} + +TypePointer IntegerConstantType::unaryOperatorResult(Token::Value _operator) const +{ + bigint value; + switch (_operator) + { + case Token::BitNot: + value = ~m_value; + break; + case Token::Add: + value = m_value; + break; + case Token::Sub: + value = -m_value; + break; + case Token::After: + return shared_from_this(); + default: + return TypePointer(); + } + return make_shared<IntegerConstantType>(value); +} + +TypePointer IntegerConstantType::binaryOperatorResult(Token::Value _operator, TypePointer const& _other) const +{ + if (_other->getCategory() == Category::Integer) + { + shared_ptr<IntegerType const> integerType = getIntegerType(); + if (!integerType) + return TypePointer(); + return integerType->binaryOperatorResult(_operator, _other); + } + else if (_other->getCategory() != getCategory()) + return TypePointer(); + + IntegerConstantType const& other = dynamic_cast<IntegerConstantType const&>(*_other); + if (Token::isCompareOp(_operator)) + { + shared_ptr<IntegerType const> thisIntegerType = getIntegerType(); + shared_ptr<IntegerType const> otherIntegerType = other.getIntegerType(); + if (!thisIntegerType || !otherIntegerType) + return TypePointer(); + return thisIntegerType->binaryOperatorResult(_operator, otherIntegerType); + } + else + { + bigint value; + switch (_operator) + { + case Token::BitOr: + value = m_value | other.m_value; + break; + case Token::BitXor: + value = m_value ^ other.m_value; + break; + case Token::BitAnd: + value = m_value & other.m_value; + break; + case Token::Add: + value = m_value + other.m_value; + break; + case Token::Sub: + value = m_value - other.m_value; + break; + case Token::Mul: + value = m_value * other.m_value; + break; + case Token::Div: + if (other.m_value == 0) + return TypePointer(); + value = m_value / other.m_value; + break; + case Token::Mod: + if (other.m_value == 0) + return TypePointer(); + value = m_value % other.m_value; + break; + case Token::Exp: + if (other.m_value < 0) + return TypePointer(); + else if (other.m_value > std::numeric_limits<unsigned int>::max()) + return TypePointer(); + else + value = boost::multiprecision::pow(m_value, other.m_value.convert_to<unsigned int>()); + break; + default: + return TypePointer(); + } + return make_shared<IntegerConstantType>(value); + } +} + +bool IntegerConstantType::operator==(Type const& _other) const +{ + if (_other.getCategory() != getCategory()) + return false; + return m_value == dynamic_cast<IntegerConstantType const&>(_other).m_value; +} + +string IntegerConstantType::toString(bool) const +{ + return "int_const " + m_value.str(); +} + +u256 IntegerConstantType::literalValue(Literal const*) const +{ + u256 value; + // we ignore the literal and hope that the type was correctly determined + solAssert(m_value <= u256(-1), "Integer constant too large."); + solAssert(m_value >= -(bigint(1) << 255), "Integer constant too small."); + + if (m_value >= 0) + value = u256(m_value); + else + value = s2u(s256(m_value)); + + return value; +} + +TypePointer IntegerConstantType::mobileType() const +{ + auto intType = getIntegerType(); + solAssert(!!intType, "mobileType called with invalid integer constant " + toString(false)); + return intType; +} + +shared_ptr<IntegerType const> IntegerConstantType::getIntegerType() const +{ + bigint value = m_value; + bool negative = (value < 0); + if (negative) // convert to positive number of same bit requirements + value = ((-value) - 1) << 1; + if (value > u256(-1)) + return shared_ptr<IntegerType const>(); + else + return make_shared<IntegerType>( + max(bytesRequired(value), 1u) * 8, + negative ? IntegerType::Modifier::Signed : IntegerType::Modifier::Unsigned + ); +} + +StringLiteralType::StringLiteralType(Literal const& _literal): + m_value(_literal.getValue()) +{ +} + +bool StringLiteralType::isImplicitlyConvertibleTo(Type const& _convertTo) const +{ + if (auto fixedBytes = dynamic_cast<FixedBytesType const*>(&_convertTo)) + return size_t(fixedBytes->numBytes()) >= m_value.size(); + else if (auto arrayType = dynamic_cast<ArrayType const*>(&_convertTo)) + return arrayType->isByteArray(); + else + return false; +} + +bool StringLiteralType::operator==(const Type& _other) const +{ + if (_other.getCategory() != getCategory()) + return false; + return m_value == dynamic_cast<StringLiteralType const&>(_other).m_value; +} + +TypePointer StringLiteralType::mobileType() const +{ + return make_shared<ArrayType>(DataLocation::Memory, true); +} + +shared_ptr<FixedBytesType> FixedBytesType::smallestTypeForLiteral(string const& _literal) +{ + if (_literal.length() <= 32) + return make_shared<FixedBytesType>(_literal.length()); + return shared_ptr<FixedBytesType>(); +} + +FixedBytesType::FixedBytesType(int _bytes): m_bytes(_bytes) +{ + solAssert(m_bytes >= 0 && m_bytes <= 32, + "Invalid byte number for fixed bytes type: " + dev::toString(m_bytes)); +} + +bool FixedBytesType::isImplicitlyConvertibleTo(Type const& _convertTo) const +{ + if (_convertTo.getCategory() != getCategory()) + return false; + FixedBytesType const& convertTo = dynamic_cast<FixedBytesType const&>(_convertTo); + return convertTo.m_bytes >= m_bytes; +} + +bool FixedBytesType::isExplicitlyConvertibleTo(Type const& _convertTo) const +{ + return _convertTo.getCategory() == Category::Integer || + _convertTo.getCategory() == Category::Contract || + _convertTo.getCategory() == getCategory(); +} + +TypePointer FixedBytesType::unaryOperatorResult(Token::Value _operator) const +{ + // "delete" and "~" is okay for FixedBytesType + if (_operator == Token::Delete) + return make_shared<VoidType>(); + else if (_operator == Token::BitNot) + return shared_from_this(); + + return TypePointer(); +} + +TypePointer FixedBytesType::binaryOperatorResult(Token::Value _operator, TypePointer const& _other) const +{ + auto commonType = dynamic_pointer_cast<FixedBytesType const>(Type::commonType(shared_from_this(), _other)); + if (!commonType) + return TypePointer(); + + // FixedBytes can be compared and have bitwise operators applied to them + if (Token::isCompareOp(_operator) || Token::isBitOp(_operator)) + return commonType; + + return TypePointer(); +} + +bool FixedBytesType::operator==(Type const& _other) const +{ + if (_other.getCategory() != getCategory()) + return false; + FixedBytesType const& other = dynamic_cast<FixedBytesType const&>(_other); + return other.m_bytes == m_bytes; +} + +bool BoolType::isExplicitlyConvertibleTo(Type const& _convertTo) const +{ + // conversion to integer is fine, but not to address + // this is an example of explicit conversions being not transitive (though implicit should be) + if (_convertTo.getCategory() == getCategory()) + { + IntegerType const& convertTo = dynamic_cast<IntegerType const&>(_convertTo); + if (!convertTo.isAddress()) + return true; + } + return isImplicitlyConvertibleTo(_convertTo); +} + +u256 BoolType::literalValue(Literal const* _literal) const +{ + solAssert(_literal, ""); + if (_literal->getToken() == Token::TrueLiteral) + return u256(1); + else if (_literal->getToken() == Token::FalseLiteral) + return u256(0); + else + BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Bool type constructed from non-boolean literal.")); +} + +TypePointer BoolType::unaryOperatorResult(Token::Value _operator) const +{ + if (_operator == Token::Delete) + return make_shared<VoidType>(); + return (_operator == Token::Not) ? shared_from_this() : TypePointer(); +} + +TypePointer BoolType::binaryOperatorResult(Token::Value _operator, TypePointer const& _other) const +{ + if (getCategory() != _other->getCategory()) + return TypePointer(); + if (Token::isCompareOp(_operator) || _operator == Token::And || _operator == Token::Or) + return _other; + else + return TypePointer(); +} + +bool ContractType::isImplicitlyConvertibleTo(Type const& _convertTo) const +{ + if (*this == _convertTo) + return true; + if (_convertTo.getCategory() == Category::Integer) + return dynamic_cast<IntegerType const&>(_convertTo).isAddress(); + if (_convertTo.getCategory() == Category::Contract) + { + auto const& bases = getContractDefinition().getLinearizedBaseContracts(); + if (m_super && bases.size() <= 1) + return false; + return find(m_super ? ++bases.begin() : bases.begin(), bases.end(), + &dynamic_cast<ContractType const&>(_convertTo).getContractDefinition()) != bases.end(); + } + return false; +} + +bool ContractType::isExplicitlyConvertibleTo(Type const& _convertTo) const +{ + return isImplicitlyConvertibleTo(_convertTo) || _convertTo.getCategory() == Category::Integer || + _convertTo.getCategory() == Category::Contract; +} + +TypePointer ContractType::unaryOperatorResult(Token::Value _operator) const +{ + return _operator == Token::Delete ? make_shared<VoidType>() : TypePointer(); +} + +TypePointer ReferenceType::unaryOperatorResult(Token::Value _operator) const +{ + if (_operator != Token::Delete) + return TypePointer(); + // delete can be used on everything except calldata references or storage pointers + // (storage references are ok) + switch (location()) + { + case DataLocation::CallData: + return TypePointer(); + case DataLocation::Memory: + return make_shared<VoidType>(); + case DataLocation::Storage: + return m_isPointer ? TypePointer() : make_shared<VoidType>(); + default: + solAssert(false, ""); + } + return TypePointer(); +} + +TypePointer ReferenceType::copyForLocationIfReference(DataLocation _location, TypePointer const& _type) +{ + if (auto type = dynamic_cast<ReferenceType const*>(_type.get())) + return type->copyForLocation(_location, false); + return _type; +} + +TypePointer ReferenceType::copyForLocationIfReference(TypePointer const& _type) const +{ + return copyForLocationIfReference(m_location, _type); +} + +string ReferenceType::stringForReferencePart() const +{ + switch (m_location) + { + case DataLocation::Storage: + return string("storage ") + (m_isPointer ? "pointer" : "ref"); + case DataLocation::CallData: + return "calldata"; + case DataLocation::Memory: + return "memory"; + } + solAssert(false, ""); + return ""; +} + +bool ArrayType::isImplicitlyConvertibleTo(const Type& _convertTo) const +{ + if (_convertTo.getCategory() != getCategory()) + return false; + auto& convertTo = dynamic_cast<ArrayType const&>(_convertTo); + if (convertTo.isByteArray() != isByteArray() || convertTo.isString() != isString()) + return false; + // memory/calldata to storage can be converted, but only to a direct storage reference + if (convertTo.location() == DataLocation::Storage && location() != DataLocation::Storage && convertTo.isPointer()) + return false; + if (convertTo.location() == DataLocation::CallData && location() != convertTo.location()) + return false; + if (convertTo.location() == DataLocation::Storage && !convertTo.isPointer()) + { + // Less restrictive conversion, since we need to copy anyway. + if (!getBaseType()->isImplicitlyConvertibleTo(*convertTo.getBaseType())) + return false; + if (convertTo.isDynamicallySized()) + return true; + return !isDynamicallySized() && convertTo.getLength() >= getLength(); + } + else + { + // Conversion to storage pointer or to memory, we de not copy element-for-element here, so + // require that the base type is the same, not only convertible. + // This disallows assignment of nested dynamic arrays from storage to memory for now. + if ( + *copyForLocationIfReference(location(), getBaseType()) != + *copyForLocationIfReference(location(), convertTo.getBaseType()) + ) + return false; + if (isDynamicallySized() != convertTo.isDynamicallySized()) + return false; + // We also require that the size is the same. + if (!isDynamicallySized() && getLength() != convertTo.getLength()) + return false; + return true; + } +} + +bool ArrayType::isExplicitlyConvertibleTo(const Type& _convertTo) const +{ + if (isImplicitlyConvertibleTo(_convertTo)) + return true; + // allow conversion bytes <-> string + if (_convertTo.getCategory() != getCategory()) + return false; + auto& convertTo = dynamic_cast<ArrayType const&>(_convertTo); + if (convertTo.location() != location()) + return false; + if (!isByteArray() || !convertTo.isByteArray()) + return false; + return true; +} + +bool ArrayType::operator==(Type const& _other) const +{ + if (_other.getCategory() != getCategory()) + return false; + ArrayType const& other = dynamic_cast<ArrayType const&>(_other); + if ( + !ReferenceType::operator==(other) || + other.isByteArray() != isByteArray() || + other.isString() != isString() || + other.isDynamicallySized() != isDynamicallySized() + ) + return false; + return isDynamicallySized() || getLength() == other.getLength(); +} + +unsigned ArrayType::getCalldataEncodedSize(bool _padded) const +{ + if (isDynamicallySized()) + return 0; + bigint size = bigint(getLength()) * (isByteArray() ? 1 : getBaseType()->getCalldataEncodedSize(_padded)); + size = ((size + 31) / 32) * 32; + solAssert(size <= numeric_limits<unsigned>::max(), "Array size does not fit unsigned."); + return unsigned(size); +} + +u256 ArrayType::getStorageSize() const +{ + if (isDynamicallySized()) + return 1; + + bigint size; + unsigned baseBytes = getBaseType()->getStorageBytes(); + if (baseBytes == 0) + size = 1; + else if (baseBytes < 32) + { + unsigned itemsPerSlot = 32 / baseBytes; + size = (bigint(getLength()) + (itemsPerSlot - 1)) / itemsPerSlot; + } + else + size = bigint(getLength()) * getBaseType()->getStorageSize(); + if (size >= bigint(1) << 256) + BOOST_THROW_EXCEPTION(TypeError() << errinfo_comment("Array too large for storage.")); + return max<u256>(1, u256(size)); +} + +unsigned ArrayType::getSizeOnStack() const +{ + if (m_location == DataLocation::CallData) + // offset [length] (stack top) + return 1 + (isDynamicallySized() ? 1 : 0); + else + // storage slot or memory offset + // byte offset inside storage value is omitted + return 1; +} + +string ArrayType::toString(bool _short) const +{ + string ret; + if (isString()) + ret = "string"; + else if (isByteArray()) + ret = "bytes"; + else + { + ret = getBaseType()->toString(_short) + "["; + if (!isDynamicallySized()) + ret += getLength().str(); + ret += "]"; + } + if (!_short) + ret += " " + stringForReferencePart(); + return ret; +} + +TypePointer ArrayType::externalType() const +{ + if (m_arrayKind != ArrayKind::Ordinary) + return this->copyForLocation(DataLocation::Memory, true); + TypePointer baseExt = m_baseType->externalType(); + if (!baseExt) + return TypePointer(); + if (m_baseType->getCategory() == Category::Array && m_baseType->isDynamicallySized()) + return TypePointer(); + + if (isDynamicallySized()) + return std::make_shared<ArrayType>(DataLocation::Memory, baseExt); + else + return std::make_shared<ArrayType>(DataLocation::Memory, baseExt, m_length); +} + +TypePointer ArrayType::copyForLocation(DataLocation _location, bool _isPointer) const +{ + auto copy = make_shared<ArrayType>(_location); + copy->m_isPointer = _isPointer; + copy->m_arrayKind = m_arrayKind; + copy->m_baseType = copy->copyForLocationIfReference(m_baseType); + copy->m_hasDynamicLength = m_hasDynamicLength; + copy->m_length = m_length; + return copy; +} + +const MemberList ArrayType::s_arrayTypeMemberList({{"length", make_shared<IntegerType>(256)}}); + +bool ContractType::operator==(Type const& _other) const +{ + if (_other.getCategory() != getCategory()) + return false; + ContractType const& other = dynamic_cast<ContractType const&>(_other); + return other.m_contract == m_contract && other.m_super == m_super; +} + +string ContractType::toString(bool) const +{ + return "contract " + string(m_super ? "super " : "") + m_contract.getName(); +} + +MemberList const& ContractType::getMembers() const +{ + // We need to lazy-initialize it because of recursive references. + if (!m_members) + { + // All address members and all interface functions + MemberList::MemberMap members( + IntegerType::AddressMemberList.begin(), + IntegerType::AddressMemberList.end() + ); + if (m_super) + { + // add the most derived of all functions which are visible in derived contracts + for (ContractDefinition const* base: m_contract.getLinearizedBaseContracts()) + for (ASTPointer<FunctionDefinition> const& function: base->getDefinedFunctions()) + { + if (!function->isVisibleInDerivedContracts()) + continue; + auto functionType = make_shared<FunctionType>(*function, true); + bool functionWithEqualArgumentsFound = false; + for (auto const& member: members) + { + if (member.name != function->getName()) + continue; + auto memberType = dynamic_cast<FunctionType const*>(member.type.get()); + solAssert(!!memberType, "Override changes type."); + if (!memberType->hasEqualArgumentTypes(*functionType)) + continue; + functionWithEqualArgumentsFound = true; + break; + } + if (!functionWithEqualArgumentsFound) + members.push_back(MemberList::Member( + function->getName(), + functionType, + function.get() + )); + } + } + else + for (auto const& it: m_contract.getInterfaceFunctions()) + members.push_back(MemberList::Member( + it.second->getDeclaration().getName(), + it.second->asMemberFunction(), + &it.second->getDeclaration() + )); + m_members.reset(new MemberList(members)); + } + return *m_members; +} + +shared_ptr<FunctionType const> const& ContractType::getConstructorType() const +{ + if (!m_constructorType) + { + FunctionDefinition const* constructor = m_contract.getConstructor(); + if (constructor) + m_constructorType = make_shared<FunctionType>(*constructor); + else + m_constructorType = make_shared<FunctionType>(TypePointers(), TypePointers()); + } + return m_constructorType; +} + +vector<tuple<VariableDeclaration const*, u256, unsigned>> ContractType::getStateVariables() const +{ + vector<VariableDeclaration const*> variables; + for (ContractDefinition const* contract: boost::adaptors::reverse(m_contract.getLinearizedBaseContracts())) + for (ASTPointer<VariableDeclaration> const& variable: contract->getStateVariables()) + if (!variable->isConstant()) + variables.push_back(variable.get()); + TypePointers types; + for (auto variable: variables) + types.push_back(variable->getType()); + StorageOffsets offsets; + offsets.computeOffsets(types); + + vector<tuple<VariableDeclaration const*, u256, unsigned>> variablesAndOffsets; + for (size_t index = 0; index < variables.size(); ++index) + if (auto const* offset = offsets.getOffset(index)) + variablesAndOffsets.push_back(make_tuple(variables[index], offset->first, offset->second)); + return variablesAndOffsets; +} + +bool StructType::isImplicitlyConvertibleTo(const Type& _convertTo) const +{ + if (_convertTo.getCategory() != getCategory()) + return false; + auto& convertTo = dynamic_cast<StructType const&>(_convertTo); + // memory/calldata to storage can be converted, but only to a direct storage reference + if (convertTo.location() == DataLocation::Storage && location() != DataLocation::Storage && convertTo.isPointer()) + return false; + if (convertTo.location() == DataLocation::CallData && location() != convertTo.location()) + return false; + return this->m_struct == convertTo.m_struct; +} + +bool StructType::operator==(Type const& _other) const +{ + if (_other.getCategory() != getCategory()) + return false; + StructType const& other = dynamic_cast<StructType const&>(_other); + return ReferenceType::operator==(other) && other.m_struct == m_struct; +} + +unsigned StructType::getCalldataEncodedSize(bool _padded) const +{ + unsigned size = 0; + for (auto const& member: getMembers()) + if (!member.type->canLiveOutsideStorage()) + return 0; + else + { + unsigned memberSize = member.type->getCalldataEncodedSize(_padded); + if (memberSize == 0) + return 0; + size += memberSize; + } + return size; +} + +u256 StructType::memorySize() const +{ + u256 size; + for (auto const& member: getMembers()) + if (member.type->canLiveOutsideStorage()) + size += member.type->memoryHeadSize(); + return size; +} + +u256 StructType::getStorageSize() const +{ + return max<u256>(1, getMembers().getStorageSize()); +} + +string StructType::toString(bool _short) const +{ + string ret = "struct " + m_struct.getName(); + if (!_short) + ret += " " + stringForReferencePart(); + return ret; +} + +MemberList const& StructType::getMembers() const +{ + // We need to lazy-initialize it because of recursive references. + if (!m_members) + { + MemberList::MemberMap members; + for (ASTPointer<VariableDeclaration> const& variable: m_struct.getMembers()) + { + TypePointer type = variable->getType(); + // Skip all mapping members if we are not in storage. + if (location() != DataLocation::Storage && !type->canLiveOutsideStorage()) + continue; + members.push_back(MemberList::Member( + variable->getName(), + copyForLocationIfReference(type), + variable.get()) + ); + } + m_members.reset(new MemberList(members)); + } + return *m_members; +} + +TypePointer StructType::copyForLocation(DataLocation _location, bool _isPointer) const +{ + auto copy = make_shared<StructType>(m_struct, _location); + copy->m_isPointer = _isPointer; + return copy; +} + +FunctionTypePointer StructType::constructorType() const +{ + TypePointers paramTypes; + strings paramNames; + for (auto const& member: getMembers()) + { + if (!member.type->canLiveOutsideStorage()) + continue; + paramNames.push_back(member.name); + paramTypes.push_back(copyForLocationIfReference(DataLocation::Memory, member.type)); + } + return make_shared<FunctionType>( + paramTypes, + TypePointers{copyForLocation(DataLocation::Memory, false)}, + paramNames, + strings(), + FunctionType::Location::Internal + ); +} + +pair<u256, unsigned> const& StructType::getStorageOffsetsOfMember(string const& _name) const +{ + auto const* offsets = getMembers().getMemberStorageOffset(_name); + solAssert(offsets, "Storage offset of non-existing member requested."); + return *offsets; +} + +u256 StructType::memoryOffsetOfMember(string const& _name) const +{ + u256 offset; + for (auto const& member: getMembers()) + if (member.name == _name) + return offset; + else + offset += member.type->memoryHeadSize(); + solAssert(false, "Member not found in struct."); + return 0; +} + +set<string> StructType::membersMissingInMemory() const +{ + set<string> missing; + for (ASTPointer<VariableDeclaration> const& variable: m_struct.getMembers()) + if (!variable->getType()->canLiveOutsideStorage()) + missing.insert(variable->getName()); + return missing; +} + +TypePointer EnumType::unaryOperatorResult(Token::Value _operator) const +{ + return _operator == Token::Delete ? make_shared<VoidType>() : TypePointer(); +} + +bool EnumType::operator==(Type const& _other) const +{ + if (_other.getCategory() != getCategory()) + return false; + EnumType const& other = dynamic_cast<EnumType const&>(_other); + return other.m_enum == m_enum; +} + +unsigned EnumType::getStorageBytes() const +{ + size_t elements = m_enum.getMembers().size(); + if (elements <= 1) + return 1; + else + return dev::bytesRequired(elements - 1); +} + +string EnumType::toString(bool) const +{ + return string("enum ") + m_enum.getName(); +} + +bool EnumType::isExplicitlyConvertibleTo(Type const& _convertTo) const +{ + return _convertTo.getCategory() == getCategory() || _convertTo.getCategory() == Category::Integer; +} + +unsigned int EnumType::getMemberValue(ASTString const& _member) const +{ + unsigned int index = 0; + for (ASTPointer<EnumValue> const& decl: m_enum.getMembers()) + { + if (decl->getName() == _member) + return index; + ++index; + } + BOOST_THROW_EXCEPTION(m_enum.createTypeError("Requested unknown enum value ." + _member)); +} + +FunctionType::FunctionType(FunctionDefinition const& _function, bool _isInternal): + m_location(_isInternal ? Location::Internal : Location::External), + m_isConstant(_function.isDeclaredConst()), + m_declaration(&_function) +{ + TypePointers params; + vector<string> paramNames; + TypePointers retParams; + vector<string> retParamNames; + + params.reserve(_function.getParameters().size()); + paramNames.reserve(_function.getParameters().size()); + for (ASTPointer<VariableDeclaration> const& var: _function.getParameters()) + { + paramNames.push_back(var->getName()); + params.push_back(var->getType()); + } + retParams.reserve(_function.getReturnParameters().size()); + retParamNames.reserve(_function.getReturnParameters().size()); + for (ASTPointer<VariableDeclaration> const& var: _function.getReturnParameters()) + { + retParamNames.push_back(var->getName()); + retParams.push_back(var->getType()); + } + swap(params, m_parameterTypes); + swap(paramNames, m_parameterNames); + swap(retParams, m_returnParameterTypes); + swap(retParamNames, m_returnParameterNames); +} + +FunctionType::FunctionType(VariableDeclaration const& _varDecl): + m_location(Location::External), m_isConstant(true), m_declaration(&_varDecl) +{ + TypePointers paramTypes; + vector<string> paramNames; + auto returnType = _varDecl.getType(); + + while (true) + { + if (auto mappingType = dynamic_cast<MappingType const*>(returnType.get())) + { + paramTypes.push_back(mappingType->getKeyType()); + paramNames.push_back(""); + returnType = mappingType->getValueType(); + } + else if (auto arrayType = dynamic_cast<ArrayType const*>(returnType.get())) + { + if (arrayType->isByteArray()) + // Return byte arrays as as whole. + break; + returnType = arrayType->getBaseType(); + paramNames.push_back(""); + paramTypes.push_back(make_shared<IntegerType>(256)); + } + else + break; + } + + TypePointers retParams; + vector<string> retParamNames; + if (auto structType = dynamic_cast<StructType const*>(returnType.get())) + { + for (auto const& member: structType->getMembers()) + if (member.type->getCategory() != Category::Mapping) + { + if (auto arrayType = dynamic_cast<ArrayType const*>(member.type.get())) + if (!arrayType->isByteArray()) + continue; + retParams.push_back(member.type); + retParamNames.push_back(member.name); + } + } + else + { + retParams.push_back(ReferenceType::copyForLocationIfReference( + DataLocation::Memory, + returnType + )); + retParamNames.push_back(""); + } + + swap(paramTypes, m_parameterTypes); + swap(paramNames, m_parameterNames); + swap(retParams, m_returnParameterTypes); + swap(retParamNames, m_returnParameterNames); +} + +FunctionType::FunctionType(const EventDefinition& _event): + m_location(Location::Event), m_isConstant(true), m_declaration(&_event) +{ + TypePointers params; + vector<string> paramNames; + params.reserve(_event.getParameters().size()); + paramNames.reserve(_event.getParameters().size()); + for (ASTPointer<VariableDeclaration> const& var: _event.getParameters()) + { + paramNames.push_back(var->getName()); + params.push_back(var->getType()); + } + swap(params, m_parameterTypes); + swap(paramNames, m_parameterNames); +} + +bool FunctionType::operator==(Type const& _other) const +{ + if (_other.getCategory() != getCategory()) + return false; + FunctionType const& other = dynamic_cast<FunctionType const&>(_other); + + if (m_location != other.m_location) + return false; + if (m_isConstant != other.isConstant()) + return false; + + if (m_parameterTypes.size() != other.m_parameterTypes.size() || + m_returnParameterTypes.size() != other.m_returnParameterTypes.size()) + return false; + auto typeCompare = [](TypePointer const& _a, TypePointer const& _b) -> bool { return *_a == *_b; }; + + if (!equal(m_parameterTypes.cbegin(), m_parameterTypes.cend(), + other.m_parameterTypes.cbegin(), typeCompare)) + return false; + if (!equal(m_returnParameterTypes.cbegin(), m_returnParameterTypes.cend(), + other.m_returnParameterTypes.cbegin(), typeCompare)) + return false; + //@todo this is ugly, but cannot be prevented right now + if (m_gasSet != other.m_gasSet || m_valueSet != other.m_valueSet) + return false; + return true; +} + +string FunctionType::toString(bool _short) const +{ + string name = "function ("; + for (auto it = m_parameterTypes.begin(); it != m_parameterTypes.end(); ++it) + name += (*it)->toString(_short) + (it + 1 == m_parameterTypes.end() ? "" : ","); + name += ") returns ("; + for (auto it = m_returnParameterTypes.begin(); it != m_returnParameterTypes.end(); ++it) + name += (*it)->toString(_short) + (it + 1 == m_returnParameterTypes.end() ? "" : ","); + return name + ")"; +} + +u256 FunctionType::getStorageSize() const +{ + BOOST_THROW_EXCEPTION( + InternalCompilerError() + << errinfo_comment("Storage size of non-storable function type requested.")); +} + +unsigned FunctionType::getSizeOnStack() const +{ + Location location = m_location; + if (m_location == Location::SetGas || m_location == Location::SetValue) + { + solAssert(m_returnParameterTypes.size() == 1, ""); + location = dynamic_cast<FunctionType const&>(*m_returnParameterTypes.front()).m_location; + } + + unsigned size = 0; + if (location == Location::External || location == Location::CallCode) + size = 2; + else if (location == Location::Bare || location == Location::BareCallCode) + size = 1; + else if (location == Location::Internal) + size = 1; + if (m_gasSet) + size++; + if (m_valueSet) + size++; + return size; +} + +FunctionTypePointer FunctionType::externalFunctionType() const +{ + TypePointers paramTypes; + TypePointers retParamTypes; + + for (auto type: m_parameterTypes) + { + if (auto ext = type->externalType()) + paramTypes.push_back(ext); + else + return FunctionTypePointer(); + } + for (auto type: m_returnParameterTypes) + { + if (auto ext = type->externalType()) + retParamTypes.push_back(ext); + else + return FunctionTypePointer(); + } + return make_shared<FunctionType>(paramTypes, retParamTypes, m_parameterNames, m_returnParameterNames, m_location, m_arbitraryParameters); +} + +MemberList const& FunctionType::getMembers() const +{ + switch (m_location) + { + case Location::External: + case Location::Creation: + case Location::ECRecover: + case Location::SHA256: + case Location::RIPEMD160: + case Location::Bare: + case Location::BareCallCode: + if (!m_members) + { + MemberList::MemberMap members{ + { + "value", + make_shared<FunctionType>( + parseElementaryTypeVector({"uint"}), + TypePointers{copyAndSetGasOrValue(false, true)}, + strings(), + strings(), + Location::SetValue, + false, + nullptr, + m_gasSet, + m_valueSet + ) + } + }; + if (m_location != Location::Creation) + members.push_back( + MemberList::Member( + "gas", + make_shared<FunctionType>( + parseElementaryTypeVector({"uint"}), + TypePointers{copyAndSetGasOrValue(true, false)}, + strings(), + strings(), + Location::SetGas, + false, + nullptr, + m_gasSet, + m_valueSet + ) + ) + ); + m_members.reset(new MemberList(members)); + } + return *m_members; + default: + return EmptyMemberList; + } +} + +bool FunctionType::canTakeArguments(TypePointers const& _argumentTypes) const +{ + TypePointers const& parameterTypes = getParameterTypes(); + if (takesArbitraryParameters()) + return true; + else if (_argumentTypes.size() != parameterTypes.size()) + return false; + else + return std::equal( + _argumentTypes.cbegin(), + _argumentTypes.cend(), + parameterTypes.cbegin(), + [](TypePointer const& argumentType, TypePointer const& parameterType) + { + return argumentType->isImplicitlyConvertibleTo(*parameterType); + } + ); +} + +bool FunctionType::hasEqualArgumentTypes(FunctionType const& _other) const +{ + if (m_parameterTypes.size() != _other.m_parameterTypes.size()) + return false; + return equal( + m_parameterTypes.cbegin(), + m_parameterTypes.cend(), + _other.m_parameterTypes.cbegin(), + [](TypePointer const& _a, TypePointer const& _b) -> bool { return *_a == *_b; } + ); +} + +bool FunctionType::isBareCall() const +{ + switch (m_location) + { + case Location::Bare: + case Location::BareCallCode: + case Location::ECRecover: + case Location::SHA256: + case Location::RIPEMD160: + return true; + default: + return false; + } +} + +string FunctionType::externalSignature(std::string const& _name) const +{ + std::string funcName = _name; + if (_name == "") + { + solAssert(m_declaration != nullptr, "Function type without name needs a declaration"); + funcName = m_declaration->getName(); + } + string ret = funcName + "("; + + FunctionTypePointer external = externalFunctionType(); + solAssert(!!external, "External function type requested."); + TypePointers externalParameterTypes = external->getParameterTypes(); + for (auto it = externalParameterTypes.cbegin(); it != externalParameterTypes.cend(); ++it) + { + solAssert(!!(*it), "Parameter should have external type"); + ret += (*it)->toString(true) + (it + 1 == externalParameterTypes.cend() ? "" : ","); + } + + return ret + ")"; +} + +u256 FunctionType::externalIdentifier() const +{ + return FixedHash<4>::Arith(FixedHash<4>(dev::sha3(externalSignature()))); +} + +TypePointers FunctionType::parseElementaryTypeVector(strings const& _types) +{ + TypePointers pointers; + pointers.reserve(_types.size()); + for (string const& type: _types) + pointers.push_back(Type::fromElementaryTypeName(type)); + return pointers; +} + +TypePointer FunctionType::copyAndSetGasOrValue(bool _setGas, bool _setValue) const +{ + return make_shared<FunctionType>( + m_parameterTypes, + m_returnParameterTypes, + m_parameterNames, + m_returnParameterNames, + m_location, + m_arbitraryParameters, + m_declaration, + m_gasSet || _setGas, + m_valueSet || _setValue + ); +} + +FunctionTypePointer FunctionType::asMemberFunction() const +{ + TypePointers parameterTypes; + for (auto const& t: m_parameterTypes) + { + auto refType = dynamic_cast<ReferenceType const*>(t.get()); + if (refType && refType->location() == DataLocation::CallData) + parameterTypes.push_back(refType->copyForLocation(DataLocation::Memory, false)); + else + parameterTypes.push_back(t); + } + + //@todo make this more intelligent once we support destructuring assignments + TypePointers returnParameterTypes; + vector<string> returnParameterNames; + if (!m_returnParameterTypes.empty() && m_returnParameterTypes.front()->getCalldataEncodedSize() > 0) + { + returnParameterTypes.push_back(m_returnParameterTypes.front()); + returnParameterNames.push_back(m_returnParameterNames.front()); + } + return make_shared<FunctionType>( + parameterTypes, + returnParameterTypes, + m_parameterNames, + returnParameterNames, + m_location, + m_arbitraryParameters, + m_declaration, + m_gasSet, + m_valueSet + ); +} + +vector<string> const FunctionType::getParameterTypeNames() const +{ + vector<string> names; + for (TypePointer const& t: m_parameterTypes) + names.push_back(t->toString(true)); + + return names; +} + +vector<string> const FunctionType::getReturnParameterTypeNames() const +{ + vector<string> names; + for (TypePointer const& t: m_returnParameterTypes) + names.push_back(t->toString(true)); + + return names; +} + +ASTPointer<ASTString> FunctionType::getDocumentation() const +{ + auto function = dynamic_cast<Documented const*>(m_declaration); + if (function) + return function->getDocumentation(); + + return ASTPointer<ASTString>(); +} + +bool MappingType::operator==(Type const& _other) const +{ + if (_other.getCategory() != getCategory()) + return false; + MappingType const& other = dynamic_cast<MappingType const&>(_other); + return *other.m_keyType == *m_keyType && *other.m_valueType == *m_valueType; +} + +string MappingType::toString(bool _short) const +{ + return "mapping(" + getKeyType()->toString(_short) + " => " + getValueType()->toString(_short) + ")"; +} + +u256 VoidType::getStorageSize() const +{ + BOOST_THROW_EXCEPTION( + InternalCompilerError() + << errinfo_comment("Storage size of non-storable void type requested.")); +} + +bool TypeType::operator==(Type const& _other) const +{ + if (_other.getCategory() != getCategory()) + return false; + TypeType const& other = dynamic_cast<TypeType const&>(_other); + return *getActualType() == *other.getActualType(); +} + +u256 TypeType::getStorageSize() const +{ + BOOST_THROW_EXCEPTION( + InternalCompilerError() + << errinfo_comment("Storage size of non-storable type type requested.")); +} + +MemberList const& TypeType::getMembers() const +{ + // We need to lazy-initialize it because of recursive references. + if (!m_members) + { + MemberList::MemberMap members; + if (m_actualType->getCategory() == Category::Contract && m_currentContract != nullptr) + { + ContractDefinition const& contract = dynamic_cast<ContractType const&>(*m_actualType).getContractDefinition(); + vector<ContractDefinition const*> currentBases = m_currentContract->getLinearizedBaseContracts(); + if (find(currentBases.begin(), currentBases.end(), &contract) != currentBases.end()) + // We are accessing the type of a base contract, so add all public and protected + // members. Note that this does not add inherited functions on purpose. + for (Declaration const* decl: contract.getInheritableMembers()) + members.push_back(MemberList::Member(decl->getName(), decl->getType(), decl)); + } + else if (m_actualType->getCategory() == Category::Enum) + { + EnumDefinition const& enumDef = dynamic_cast<EnumType const&>(*m_actualType).getEnumDefinition(); + auto enumType = make_shared<EnumType>(enumDef); + for (ASTPointer<EnumValue> const& enumValue: enumDef.getMembers()) + members.push_back(MemberList::Member(enumValue->getName(), enumType)); + } + m_members.reset(new MemberList(members)); + } + return *m_members; +} + +ModifierType::ModifierType(const ModifierDefinition& _modifier) +{ + TypePointers params; + params.reserve(_modifier.getParameters().size()); + for (ASTPointer<VariableDeclaration> const& var: _modifier.getParameters()) + params.push_back(var->getType()); + swap(params, m_parameterTypes); +} + +u256 ModifierType::getStorageSize() const +{ + BOOST_THROW_EXCEPTION( + InternalCompilerError() + << errinfo_comment("Storage size of non-storable type type requested.")); +} + +bool ModifierType::operator==(Type const& _other) const +{ + if (_other.getCategory() != getCategory()) + return false; + ModifierType const& other = dynamic_cast<ModifierType const&>(_other); + + if (m_parameterTypes.size() != other.m_parameterTypes.size()) + return false; + auto typeCompare = [](TypePointer const& _a, TypePointer const& _b) -> bool { return *_a == *_b; }; + + if (!equal(m_parameterTypes.cbegin(), m_parameterTypes.cend(), + other.m_parameterTypes.cbegin(), typeCompare)) + return false; + return true; +} + +string ModifierType::toString(bool _short) const +{ + string name = "modifier ("; + for (auto it = m_parameterTypes.begin(); it != m_parameterTypes.end(); ++it) + name += (*it)->toString(_short) + (it + 1 == m_parameterTypes.end() ? "" : ","); + return name + ")"; +} + +MagicType::MagicType(MagicType::Kind _kind): + m_kind(_kind) +{ + switch (m_kind) + { + case Kind::Block: + m_members = MemberList({ + {"coinbase", make_shared<IntegerType>(0, IntegerType::Modifier::Address)}, + {"timestamp", make_shared<IntegerType>(256)}, + {"blockhash", make_shared<FunctionType>(strings{"uint"}, strings{"bytes32"}, FunctionType::Location::BlockHash)}, + {"difficulty", make_shared<IntegerType>(256)}, + {"number", make_shared<IntegerType>(256)}, + {"gaslimit", make_shared<IntegerType>(256)} + }); + break; + case Kind::Message: + m_members = MemberList({ + {"sender", make_shared<IntegerType>(0, IntegerType::Modifier::Address)}, + {"gas", make_shared<IntegerType>(256)}, + {"value", make_shared<IntegerType>(256)}, + {"data", make_shared<ArrayType>(DataLocation::CallData)}, + {"sig", make_shared<FixedBytesType>(4)} + }); + break; + case Kind::Transaction: + m_members = MemberList({ + {"origin", make_shared<IntegerType>(0, IntegerType::Modifier::Address)}, + {"gasprice", make_shared<IntegerType>(256)} + }); + break; + default: + BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Unknown kind of magic.")); + } +} + +bool MagicType::operator==(Type const& _other) const +{ + if (_other.getCategory() != getCategory()) + return false; + MagicType const& other = dynamic_cast<MagicType const&>(_other); + return other.m_kind == m_kind; +} + +string MagicType::toString(bool) const +{ + switch (m_kind) + { + case Kind::Block: + return "block"; + case Kind::Message: + return "msg"; + case Kind::Transaction: + return "tx"; + default: + BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Unknown kind of magic.")); + } +} |