diff --git a/AST.cpp b/AST.cpp index 44cf39291..565560adc 100644 --- a/AST.cpp +++ b/AST.cpp @@ -337,9 +337,11 @@ void ExpressionStatement::checkTypeRequirements() void Expression::expectType(Type const& _expectedType) { checkTypeRequirements(); - if (!getType()->isImplicitlyConvertibleTo(_expectedType)) - BOOST_THROW_EXCEPTION(createTypeError("Type not implicitly convertible to expected type.")); - //@todo provide more information to the exception + Type const& type = *getType(); + if (!type.isImplicitlyConvertibleTo(_expectedType)) + BOOST_THROW_EXCEPTION(createTypeError("Type " + type.toString() + + " not implicitly convertible to expected type " + + _expectedType.toString() + ".")); } void UnaryOperation::checkTypeRequirements() @@ -363,14 +365,18 @@ void BinaryOperation::checkTypeRequirements() else if (m_left->getType()->isImplicitlyConvertibleTo(*m_right->getType())) m_commonType = m_right->getType(); else - BOOST_THROW_EXCEPTION(createTypeError("No common type found in binary operation.")); + BOOST_THROW_EXCEPTION(createTypeError("No common type found in binary operation: " + + m_left->getType()->toString() + " vs. " + + m_right->getType()->toString())); if (Token::isCompareOp(m_operator)) m_type = make_shared(); else { m_type = m_commonType; if (!m_commonType->acceptsBinaryOperator(m_operator)) - BOOST_THROW_EXCEPTION(createTypeError("Operator not compatible with type.")); + BOOST_THROW_EXCEPTION(createTypeError("Operator " + string(Token::toString(m_operator)) + + " not compatible with type " + + m_commonType->toString())); } } @@ -479,6 +485,8 @@ void ElementaryTypeNameExpression::checkTypeRequirements() void Literal::checkTypeRequirements() { m_type = Type::forLiteral(*this); + if (!m_type) + BOOST_THROW_EXCEPTION(createTypeError("Literal value too large.")); } } diff --git a/AST.h b/AST.h index 793ce863f..ce9190ea4 100644 --- a/AST.h +++ b/AST.h @@ -565,12 +565,15 @@ public: Expression& getLeftExpression() const { return *m_left; } Expression& getRightExpression() const { return *m_right; } Token::Value getOperator() const { return m_operator; } + Type const& getCommonType() const { return *m_commonType; } private: ASTPointer m_left; Token::Value m_operator; ASTPointer m_right; + /// The common type that is used for the operation, not necessarily the result type (e.g. for + /// comparisons, this is always bool). std::shared_ptr m_commonType; }; diff --git a/Compiler.cpp b/Compiler.cpp index 93cb172d8..9ae8d7c62 100644 --- a/Compiler.cpp +++ b/Compiler.cpp @@ -272,7 +272,7 @@ bool Compiler::visit(Return& _return) { ExpressionCompiler::compileExpression(m_context, *expression); VariableDeclaration const& firstVariable = *_return.getFunctionReturnParameters().getParameters().front(); - ExpressionCompiler::cleanHigherOrderBitsIfNeeded(*expression->getType(), *firstVariable.getType()); + ExpressionCompiler::appendTypeConversion(m_context, *expression->getType(), *firstVariable.getType()); int stackPosition = m_context.getStackPositionOfVariable(firstVariable); m_context << eth::swapInstruction(stackPosition) << eth::Instruction::POP; } @@ -285,8 +285,9 @@ bool Compiler::visit(VariableDefinition& _variableDefinition) if (Expression* expression = _variableDefinition.getExpression()) { ExpressionCompiler::compileExpression(m_context, *expression); - ExpressionCompiler::cleanHigherOrderBitsIfNeeded(*expression->getType(), - *_variableDefinition.getDeclaration().getType()); + ExpressionCompiler::appendTypeConversion(m_context, + *expression->getType(), + *_variableDefinition.getDeclaration().getType()); int stackPosition = m_context.getStackPositionOfVariable(_variableDefinition.getDeclaration()); m_context << eth::swapInstruction(stackPosition) << eth::Instruction::POP; } diff --git a/ExpressionCompiler.cpp b/ExpressionCompiler.cpp index d23579b11..6efb8b20c 100644 --- a/ExpressionCompiler.cpp +++ b/ExpressionCompiler.cpp @@ -37,6 +37,13 @@ void ExpressionCompiler::compileExpression(CompilerContext& _context, Expression _expression.accept(compiler); } +void ExpressionCompiler::appendTypeConversion(CompilerContext& _context, + Type const& _typeOnStack, Type const& _targetType) +{ + ExpressionCompiler compiler(_context); + compiler.appendTypeConversion(_typeOnStack, _targetType); +} + bool ExpressionCompiler::visit(Assignment& _assignment) { m_currentLValue = nullptr; @@ -44,7 +51,7 @@ bool ExpressionCompiler::visit(Assignment& _assignment) Expression& rightHandSide = _assignment.getRightHandSide(); rightHandSide.accept(*this); Type const& resultType = *_assignment.getType(); - cleanHigherOrderBitsIfNeeded(*rightHandSide.getType(), resultType); + appendTypeConversion(*rightHandSide.getType(), resultType); _assignment.getLeftHandSide().accept(*this); Token::Value op = _assignment.getAssignmentOperator(); @@ -113,7 +120,7 @@ bool ExpressionCompiler::visit(BinaryOperation& _binaryOperation) { Expression& leftExpression = _binaryOperation.getLeftExpression(); Expression& rightExpression = _binaryOperation.getRightExpression(); - Type const& resultType = *_binaryOperation.getType(); + Type const& commonType = _binaryOperation.getCommonType(); Token::Value const op = _binaryOperation.getOperator(); if (op == Token::AND || op == Token::OR) @@ -121,23 +128,21 @@ bool ExpressionCompiler::visit(BinaryOperation& _binaryOperation) // special case: short-circuiting appendAndOrOperatorCode(_binaryOperation); } - else if (Token::isCompareOp(op)) - { - leftExpression.accept(*this); - rightExpression.accept(*this); - - // the types to compare have to be the same, but the resulting type is always bool - if (asserts(*leftExpression.getType() == *rightExpression.getType())) - BOOST_THROW_EXCEPTION(InternalCompilerError()); - appendCompareOperatorCode(op, *leftExpression.getType()); - } else { + bool cleanupNeeded = false; + if (commonType.getCategory() == Type::Category::INTEGER) + if (Token::isCompareOp(op) || op == Token::DIV || op == Token::MOD) + cleanupNeeded = true; + leftExpression.accept(*this); - cleanHigherOrderBitsIfNeeded(*leftExpression.getType(), resultType); + appendTypeConversion(*leftExpression.getType(), commonType, cleanupNeeded); rightExpression.accept(*this); - cleanHigherOrderBitsIfNeeded(*rightExpression.getType(), resultType); - appendOrdinaryBinaryOperatorCode(op, resultType); + appendTypeConversion(*rightExpression.getType(), commonType, cleanupNeeded); + if (Token::isCompareOp(op)) + appendCompareOperatorCode(op, commonType); + else + appendOrdinaryBinaryOperatorCode(op, commonType); } // do not visit the child nodes, we already did that explicitly @@ -153,7 +158,7 @@ bool ExpressionCompiler::visit(FunctionCall& _functionCall) BOOST_THROW_EXCEPTION(InternalCompilerError()); Expression& firstArgument = *_functionCall.getArguments().front(); firstArgument.accept(*this); - cleanHigherOrderBitsIfNeeded(*firstArgument.getType(), *_functionCall.getType()); + appendTypeConversion(*firstArgument.getType(), *_functionCall.getType()); } else { @@ -170,7 +175,7 @@ bool ExpressionCompiler::visit(FunctionCall& _functionCall) for (unsigned i = 0; i < arguments.size(); ++i) { arguments[i]->accept(*this); - cleanHigherOrderBitsIfNeeded(*arguments[i]->getType(), + appendTypeConversion(*arguments[i]->getType(), *function.getParameters()[i]->getType()); } @@ -233,28 +238,6 @@ void ExpressionCompiler::endVisit(Literal& _literal) } } -void ExpressionCompiler::cleanHigherOrderBitsIfNeeded(Type const& _typeOnStack, Type const& _targetType) -{ - // If the type of one of the operands is extended, we need to remove all - // higher-order bits that we might have ignored in previous operations. - // @todo: store in the AST whether the operand might have "dirty" higher - // order bits - - if (_typeOnStack == _targetType) - return; - if (_typeOnStack.getCategory() == Type::Category::INTEGER && - _targetType.getCategory() == Type::Category::INTEGER) - { - //@todo - } - else - { - // If we get here, there is either an implementation missing to clean higher oder bits - // for non-integer types that are explicitly convertible or we got here in error. - BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Invalid type conversion requested.")); - } -} - void ExpressionCompiler::appendAndOrOperatorCode(BinaryOperation& _binaryOperation) { Token::Value const op = _binaryOperation.getOperator(); @@ -379,6 +362,32 @@ void ExpressionCompiler::appendShiftOperatorCode(Token::Value _operator) } } +void ExpressionCompiler::appendTypeConversion(Type const& _typeOnStack, Type const& _targetType, bool _cleanupNeeded) +{ + // If the type of one of the operands is extended, we need to remove all + // higher-order bits that we might have ignored in previous operations. + // @todo: store in the AST whether the operand might have "dirty" higher + // order bits + + if (_typeOnStack == _targetType && !_cleanupNeeded) + return; + if (_typeOnStack.getCategory() == Type::Category::INTEGER) + appendHighBitsCleanup(dynamic_cast(_typeOnStack)); + else if (_typeOnStack != _targetType) + // All other types should not be convertible to non-equal types. + BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Invalid type conversion requested.")); +} + +void ExpressionCompiler::appendHighBitsCleanup(IntegerType const& _typeOnStack) +{ + if (_typeOnStack.getNumBits() == 256) + return; + else if (_typeOnStack.isSigned()) + m_context << u256(_typeOnStack.getNumBits() / 8 - 1) << eth::Instruction::SIGNEXTEND; + else + m_context << ((u256(1) << _typeOnStack.getNumBits()) - 1) << eth::Instruction::AND; +} + void ExpressionCompiler::storeInLValue(Expression const& _expression) { moveToLValue(_expression); diff --git a/ExpressionCompiler.h b/ExpressionCompiler.h index a930723cc..d67814be0 100644 --- a/ExpressionCompiler.h +++ b/ExpressionCompiler.h @@ -26,6 +26,8 @@ namespace dev { namespace solidity { class CompilerContext; // forward +class Type; // forward +class IntegerType; // forward /// Compiler for expressions, i.e. converts an AST tree whose root is an Expression into a stream /// of EVM instructions. It needs a compiler context that is the same for the whole compilation @@ -37,7 +39,7 @@ public: static void compileExpression(CompilerContext& _context, Expression& _expression); /// Appends code to remove dirty higher order bits in case of an implicit promotion to a wider type. - static void cleanHigherOrderBitsIfNeeded(Type const& _typeOnStack, Type const& _targetType); + static void appendTypeConversion(CompilerContext& _context, Type const& _typeOnStack, Type const& _targetType); private: ExpressionCompiler(CompilerContext& _compilerContext): m_currentLValue(nullptr), m_context(_compilerContext) {} @@ -62,6 +64,14 @@ private: void appendShiftOperatorCode(Token::Value _operator); /// @} + /// Appends an implicit or explicit type conversion. For now this comprises only erasing + /// higher-order bits (@see appendHighBitCleanup) when widening integer types. + /// If @a _cleanupNeeded, high order bits cleanup is also done if no type conversion would be + /// necessary. + void appendTypeConversion(Type const& _typeOnStack, Type const& _targetType, bool _cleanupNeeded = false); + //// Appends code that cleans higher-order bits for integer types. + void appendHighBitsCleanup(IntegerType const& _typeOnStack); + /// Stores the value on top of the stack in the current lvalue and copies that value to the /// top of the stack again void storeInLValue(Expression const& _expression); diff --git a/Scanner.cpp b/Scanner.cpp index c36820317..b13e52d7e 100644 --- a/Scanner.cpp +++ b/Scanner.cpp @@ -271,7 +271,7 @@ void Scanner::scanToken() token = Token::ADD; break; case '-': - // - -- -= + // - -- -= Number advance(); if (m_char == '-') { @@ -280,6 +280,8 @@ void Scanner::scanToken() } else if (m_char == '=') token = selectToken(Token::ASSIGN_SUB); + else if (m_char == '.' || IsDecimalDigit(m_char)) + token = scanNumber('-'); else token = Token::SUB; break; @@ -331,7 +333,7 @@ void Scanner::scanToken() // . Number advance(); if (IsDecimalDigit(m_char)) - token = scanNumber(true); + token = scanNumber('.'); else token = Token::PERIOD; break; @@ -372,7 +374,7 @@ void Scanner::scanToken() if (IsIdentifierStart(m_char)) token = scanIdentifierOrKeyword(); else if (IsDecimalDigit(m_char)) - token = scanNumber(false); + token = scanNumber(); else if (skipWhitespace()) token = Token::WHITESPACE; else if (isSourcePastEndOfInput()) @@ -461,14 +463,11 @@ void Scanner::scanDecimalDigits() } -Token::Value Scanner::scanNumber(bool _periodSeen) +Token::Value Scanner::scanNumber(char _charSeen) { - // the first digit of the number or the fraction - if (asserts(IsDecimalDigit(m_char))) - BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Number does not start with decimal digit.")); - enum { DECIMAL, HEX, OCTAL, IMPLICIT_OCTAL, BINARY } kind = DECIMAL; + enum { DECIMAL, HEX, BINARY } kind = DECIMAL; LiteralScope literal(this); - if (_periodSeen) + if (_charSeen == '.') { // we have already seen a decimal point of the float addLiteralChar('.'); @@ -476,12 +475,13 @@ Token::Value Scanner::scanNumber(bool _periodSeen) } else { + if (_charSeen == '-') + addLiteralChar('-'); // if the first character is '0' we must check for octals and hex if (m_char == '0') { addLiteralCharAndAdvance(); - // either 0, 0exxx, 0Exxx, 0.xxx, a hex number, a binary number or - // an octal number. + // either 0, 0exxx, 0Exxx, 0.xxx or a hex number if (m_char == 'x' || m_char == 'X') { // hex number @@ -556,17 +556,73 @@ Token::Value Scanner::scanNumber(bool _periodSeen) KEYWORD("function", Token::FUNCTION) \ KEYWORD_GROUP('h') \ KEYWORD("hash", Token::HASH) \ + KEYWORD("hash8", Token::HASH8) \ + KEYWORD("hash16", Token::HASH16) \ + KEYWORD("hash24", Token::HASH24) \ KEYWORD("hash32", Token::HASH32) \ + KEYWORD("hash40", Token::HASH40) \ + KEYWORD("hash48", Token::HASH48) \ + KEYWORD("hash56", Token::HASH56) \ KEYWORD("hash64", Token::HASH64) \ + KEYWORD("hash72", Token::HASH72) \ + KEYWORD("hash80", Token::HASH80) \ + KEYWORD("hash88", Token::HASH88) \ + KEYWORD("hash96", Token::HASH96) \ + KEYWORD("hash104", Token::HASH104) \ + KEYWORD("hash112", Token::HASH112) \ + KEYWORD("hash120", Token::HASH120) \ KEYWORD("hash128", Token::HASH128) \ + KEYWORD("hash136", Token::HASH136) \ + KEYWORD("hash144", Token::HASH144) \ + KEYWORD("hash152", Token::HASH152) \ + KEYWORD("hash160", Token::HASH160) \ + KEYWORD("hash168", Token::HASH168) \ + KEYWORD("hash178", Token::HASH176) \ + KEYWORD("hash184", Token::HASH184) \ + KEYWORD("hash192", Token::HASH192) \ + KEYWORD("hash200", Token::HASH200) \ + KEYWORD("hash208", Token::HASH208) \ + KEYWORD("hash216", Token::HASH216) \ + KEYWORD("hash224", Token::HASH224) \ + KEYWORD("hash232", Token::HASH232) \ + KEYWORD("hash240", Token::HASH240) \ + KEYWORD("hash248", Token::HASH248) \ KEYWORD("hash256", Token::HASH256) \ KEYWORD_GROUP('i') \ KEYWORD("if", Token::IF) \ KEYWORD("in", Token::IN) \ KEYWORD("int", Token::INT) \ + KEYWORD("int8", Token::INT8) \ + KEYWORD("int16", Token::INT16) \ + KEYWORD("int24", Token::INT24) \ KEYWORD("int32", Token::INT32) \ + KEYWORD("int40", Token::INT40) \ + KEYWORD("int48", Token::INT48) \ + KEYWORD("int56", Token::INT56) \ KEYWORD("int64", Token::INT64) \ + KEYWORD("int72", Token::INT72) \ + KEYWORD("int80", Token::INT80) \ + KEYWORD("int88", Token::INT88) \ + KEYWORD("int96", Token::INT96) \ + KEYWORD("int104", Token::INT104) \ + KEYWORD("int112", Token::INT112) \ + KEYWORD("int120", Token::INT120) \ KEYWORD("int128", Token::INT128) \ + KEYWORD("int136", Token::INT136) \ + KEYWORD("int144", Token::INT144) \ + KEYWORD("int152", Token::INT152) \ + KEYWORD("int160", Token::INT160) \ + KEYWORD("int168", Token::INT168) \ + KEYWORD("int178", Token::INT176) \ + KEYWORD("int184", Token::INT184) \ + KEYWORD("int192", Token::INT192) \ + KEYWORD("int200", Token::INT200) \ + KEYWORD("int208", Token::INT208) \ + KEYWORD("int216", Token::INT216) \ + KEYWORD("int224", Token::INT224) \ + KEYWORD("int232", Token::INT232) \ + KEYWORD("int240", Token::INT240) \ + KEYWORD("int248", Token::INT248) \ KEYWORD("int256", Token::INT256) \ KEYWORD_GROUP('l') \ KEYWORD_GROUP('m') \ @@ -591,9 +647,37 @@ Token::Value Scanner::scanNumber(bool _periodSeen) KEYWORD("true", Token::TRUE_LITERAL) \ KEYWORD_GROUP('u') \ KEYWORD("uint", Token::UINT) \ + KEYWORD("uint8", Token::UINT8) \ + KEYWORD("uint16", Token::UINT16) \ + KEYWORD("uint24", Token::UINT24) \ KEYWORD("uint32", Token::UINT32) \ + KEYWORD("uint40", Token::UINT40) \ + KEYWORD("uint48", Token::UINT48) \ + KEYWORD("uint56", Token::UINT56) \ KEYWORD("uint64", Token::UINT64) \ + KEYWORD("uint72", Token::UINT72) \ + KEYWORD("uint80", Token::UINT80) \ + KEYWORD("uint88", Token::UINT88) \ + KEYWORD("uint96", Token::UINT96) \ + KEYWORD("uint104", Token::UINT104) \ + KEYWORD("uint112", Token::UINT112) \ + KEYWORD("uint120", Token::UINT120) \ KEYWORD("uint128", Token::UINT128) \ + KEYWORD("uint136", Token::UINT136) \ + KEYWORD("uint144", Token::UINT144) \ + KEYWORD("uint152", Token::UINT152) \ + KEYWORD("uint160", Token::UINT160) \ + KEYWORD("uint168", Token::UINT168) \ + KEYWORD("uint178", Token::UINT176) \ + KEYWORD("uint184", Token::UINT184) \ + KEYWORD("uint192", Token::UINT192) \ + KEYWORD("uint200", Token::UINT200) \ + KEYWORD("uint208", Token::UINT208) \ + KEYWORD("uint216", Token::UINT216) \ + KEYWORD("uint224", Token::UINT224) \ + KEYWORD("uint232", Token::UINT232) \ + KEYWORD("uint240", Token::UINT240) \ + KEYWORD("uint248", Token::UINT248) \ KEYWORD("uint256", Token::UINT256) \ KEYWORD("ureal", Token::UREAL) \ KEYWORD_GROUP('v') \ diff --git a/Scanner.h b/Scanner.h index 537c2434e..997365f3c 100644 --- a/Scanner.h +++ b/Scanner.h @@ -180,7 +180,7 @@ private: Token::Value skipMultiLineComment(); void scanDecimalDigits(); - Token::Value scanNumber(bool _periodSeen); + Token::Value scanNumber(char _charSeen = 0); Token::Value scanIdentifierOrKeyword(); Token::Value scanString(); diff --git a/Token.h b/Token.h index 0fb9b670f..67971c3d0 100644 --- a/Token.h +++ b/Token.h @@ -169,19 +169,103 @@ namespace solidity * the implementation in Types.cpp has to be synced to this here * TODO more to be added */ \ K(INT, "int", 0) \ + K(INT8, "int8", 0) \ + K(INT16, "int16", 0) \ + K(INT24, "int24", 0) \ K(INT32, "int32", 0) \ + K(INT40, "int40", 0) \ + K(INT48, "int48", 0) \ + K(INT56, "int56", 0) \ K(INT64, "int64", 0) \ + K(INT72, "int72", 0) \ + K(INT80, "int80", 0) \ + K(INT88, "int88", 0) \ + K(INT96, "int96", 0) \ + K(INT104, "int104", 0) \ + K(INT112, "int112", 0) \ + K(INT120, "int120", 0) \ K(INT128, "int128", 0) \ + K(INT136, "int136", 0) \ + K(INT144, "int144", 0) \ + K(INT152, "int152", 0) \ + K(INT160, "int160", 0) \ + K(INT168, "int168", 0) \ + K(INT176, "int178", 0) \ + K(INT184, "int184", 0) \ + K(INT192, "int192", 0) \ + K(INT200, "int200", 0) \ + K(INT208, "int208", 0) \ + K(INT216, "int216", 0) \ + K(INT224, "int224", 0) \ + K(INT232, "int232", 0) \ + K(INT240, "int240", 0) \ + K(INT248, "int248", 0) \ K(INT256, "int256", 0) \ K(UINT, "uint", 0) \ + K(UINT8, "uint8", 0) \ + K(UINT16, "uint16", 0) \ + K(UINT24, "uint24", 0) \ K(UINT32, "uint32", 0) \ + K(UINT40, "uint40", 0) \ + K(UINT48, "uint48", 0) \ + K(UINT56, "uint56", 0) \ K(UINT64, "uint64", 0) \ + K(UINT72, "uint72", 0) \ + K(UINT80, "uint80", 0) \ + K(UINT88, "uint88", 0) \ + K(UINT96, "uint96", 0) \ + K(UINT104, "uint104", 0) \ + K(UINT112, "uint112", 0) \ + K(UINT120, "uint120", 0) \ K(UINT128, "uint128", 0) \ + K(UINT136, "uint136", 0) \ + K(UINT144, "uint144", 0) \ + K(UINT152, "uint152", 0) \ + K(UINT160, "uint160", 0) \ + K(UINT168, "uint168", 0) \ + K(UINT176, "uint178", 0) \ + K(UINT184, "uint184", 0) \ + K(UINT192, "uint192", 0) \ + K(UINT200, "uint200", 0) \ + K(UINT208, "uint208", 0) \ + K(UINT216, "uint216", 0) \ + K(UINT224, "uint224", 0) \ + K(UINT232, "uint232", 0) \ + K(UINT240, "uint240", 0) \ + K(UINT248, "uint248", 0) \ K(UINT256, "uint256", 0) \ K(HASH, "hash", 0) \ + K(HASH8, "hash8", 0) \ + K(HASH16, "hash16", 0) \ + K(HASH24, "hash24", 0) \ K(HASH32, "hash32", 0) \ + K(HASH40, "hash40", 0) \ + K(HASH48, "hash48", 0) \ + K(HASH56, "hash56", 0) \ K(HASH64, "hash64", 0) \ + K(HASH72, "hash72", 0) \ + K(HASH80, "hash80", 0) \ + K(HASH88, "hash88", 0) \ + K(HASH96, "hash96", 0) \ + K(HASH104, "hash104", 0) \ + K(HASH112, "hash112", 0) \ + K(HASH120, "hash120", 0) \ K(HASH128, "hash128", 0) \ + K(HASH136, "hash136", 0) \ + K(HASH144, "hash144", 0) \ + K(HASH152, "hash152", 0) \ + K(HASH160, "hash160", 0) \ + K(HASH168, "hash168", 0) \ + K(HASH176, "hash178", 0) \ + K(HASH184, "hash184", 0) \ + K(HASH192, "hash192", 0) \ + K(HASH200, "hash200", 0) \ + K(HASH208, "hash208", 0) \ + K(HASH216, "hash216", 0) \ + K(HASH224, "hash224", 0) \ + K(HASH232, "hash232", 0) \ + K(HASH240, "hash240", 0) \ + K(HASH248, "hash248", 0) \ K(HASH256, "hash256", 0) \ K(ADDRESS, "address", 0) \ K(BOOL, "bool", 0) \ diff --git a/Types.cpp b/Types.cpp index a4d70e3a0..7354255e1 100644 --- a/Types.cpp +++ b/Types.cpp @@ -25,12 +25,14 @@ #include #include +using namespace std; + namespace dev { namespace solidity { -std::shared_ptr Type::fromElementaryTypeName(Token::Value _typeToken) +shared_ptr Type::fromElementaryTypeName(Token::Value _typeToken) { if (asserts(Token::isElementaryTypeName(_typeToken))) BOOST_THROW_EXCEPTION(InternalCompilerError()); @@ -38,58 +40,63 @@ std::shared_ptr Type::fromElementaryTypeName(Token::Value _typeToken) if (Token::INT <= _typeToken && _typeToken <= Token::HASH256) { int offset = _typeToken - Token::INT; - int bits = offset % 5; - if (bits == 0) - bits = 256; - else - bits = (1 << (bits - 1)) * 32; - int modifier = offset / 5; - return std::make_shared(bits, - modifier == 0 ? IntegerType::Modifier::SIGNED : - modifier == 1 ? IntegerType::Modifier::UNSIGNED : - IntegerType::Modifier::HASH); + int bytes = offset % 33; + if (bytes == 0) + bytes = 32; + int modifier = offset / 33; + return make_shared(bytes * 8, + modifier == 0 ? IntegerType::Modifier::SIGNED : + modifier == 1 ? IntegerType::Modifier::UNSIGNED : + IntegerType::Modifier::HASH); } else if (_typeToken == Token::ADDRESS) - return std::make_shared(0, IntegerType::Modifier::ADDRESS); + return make_shared(0, IntegerType::Modifier::ADDRESS); else if (_typeToken == Token::BOOL) - return std::make_shared(); + return make_shared(); else BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Unable to convert elementary typename " + std::string(Token::toString(_typeToken)) + " to type.")); - return std::shared_ptr(); + return shared_ptr(); } -std::shared_ptr Type::fromUserDefinedTypeName(UserDefinedTypeName const& _typeName) +shared_ptr Type::fromUserDefinedTypeName(UserDefinedTypeName const& _typeName) { - return std::make_shared(*_typeName.getReferencedStruct()); + return make_shared(*_typeName.getReferencedStruct()); } -std::shared_ptr Type::fromMapping(Mapping const&) +shared_ptr Type::fromMapping(Mapping const&) { BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Mapping types not yet implemented.")); - return std::shared_ptr(); + return shared_ptr(); } -std::shared_ptr Type::forLiteral(Literal const& _literal) +shared_ptr Type::forLiteral(Literal const& _literal) { switch (_literal.getToken()) { case Token::TRUE_LITERAL: case Token::FALSE_LITERAL: - return std::make_shared(); + return make_shared(); case Token::NUMBER: return IntegerType::smallestTypeForLiteral(_literal.getValue()); case Token::STRING_LITERAL: - return std::shared_ptr(); // @todo + return shared_ptr(); // @todo default: - return std::shared_ptr(); + return shared_ptr(); } } -std::shared_ptr IntegerType::smallestTypeForLiteral(std::string const&) +shared_ptr IntegerType::smallestTypeForLiteral(string const& _literal) { - //@todo - return std::make_shared(256, Modifier::UNSIGNED); + bigint value(_literal); + bool isSigned = value < 0 || (!_literal.empty() && _literal.front() == '-'); + if (isSigned) + // convert to positive number of same bit requirements + value = ((-value) - 1) << 1; + unsigned bytes = max(bytesRequired(value), 1u); + if (bytes > 32) + return shared_ptr(); + return make_shared(bytes * 8, isSigned ? Modifier::SIGNED : Modifier::UNSIGNED); } IntegerType::IntegerType(int _bits, IntegerType::Modifier _modifier): @@ -155,19 +162,17 @@ bool IntegerType::operator==(Type const& _other) const return other.m_bits == m_bits && other.m_modifier == m_modifier; } -std::string IntegerType::toString() const +string IntegerType::toString() const { if (isAddress()) return "address"; - std::string prefix = isHash() ? "hash" : (isSigned() ? "int" : "uint"); + string prefix = isHash() ? "hash" : (isSigned() ? "int" : "uint"); return prefix + dev::toString(m_bits); } u256 IntegerType::literalValue(Literal const& _literal) const { bigint value(_literal.getValue()); - //@todo check that the number is not too large - //@todo does this work for signed numbers? return u256(value); } diff --git a/Types.h b/Types.h index 4493b8037..8c88ca79f 100644 --- a/Types.h +++ b/Types.h @@ -56,7 +56,8 @@ public: static std::shared_ptr fromMapping(Mapping const& _typeName); /// @} - /// Auto-detect the proper type for a literal + /// Auto-detect the proper type for a literal. @returns an empty pointer if the literal does + /// not fit any type. static std::shared_ptr forLiteral(Literal const& _literal); virtual Category getCategory() const = 0; @@ -95,6 +96,8 @@ public: }; virtual Category getCategory() const override { return Category::INTEGER; } + /// @returns the smallest integer type for the given literal or an empty pointer + /// if no type fits. static std::shared_ptr smallestTypeForLiteral(std::string const& _literal); explicit IntegerType(int _bits, Modifier _modifier = Modifier::UNSIGNED);