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Improves Result<T> in order to prevent defects.

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This commit is contained in:
Erik Kundt
2019-03-14 14:33:28 +01:00
parent 6ac5c52528
commit b9a7a88346
3 changed files with 38 additions and 14 deletions
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libsolidity/ast/Types.cpp
+8 -8
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@@ -129,10 +129,10 @@ bool fitsPrecisionBase2(bigint const& _mantissa, uint32_t _expBase2)
BoolResult fitsIntegerType(bigint const& _value, IntegerType const& _type)
{
if (_value < 0 && !_type.isSigned())
return BoolResult{std::string("Cannot implicitly convert signed literal to unsigned type.")};
return BoolResult::err("Cannot implicitly convert signed literal to unsigned type.");
if (_type.minValue() > _value || _value > _type.maxValue())
return BoolResult{"Literal is too large to fit in " + _type.toString(false) + "."};
return BoolResult::err("Literal is too large to fit in " + _type.toString(false) + ".");
return true;
}
@@ -535,7 +535,7 @@ TypeResult AddressType::unaryOperatorResult(Token _operator) const
TypeResult AddressType::binaryOperatorResult(Token _operator, TypePointer const& _other) const
{
if (!TokenTraits::isCompareOp(_operator))
return TypeResult{"Arithmetic operations on addresses are not supported. Convert to integer first before using them."};
return TypeResult::err("Arithmetic operations on addresses are not supported. Convert to integer first before using them.");
return Type::commonType(shared_from_this(), _other);
}
@@ -638,7 +638,7 @@ TypeResult IntegerType::unaryOperatorResult(Token _operator) const
_operator == Token::Dec || _operator == Token::BitNot)
return TypeResult{shared_from_this()};
else
return TypeResult{""};
return TypeResult::err("");
}
bool IntegerType::operator==(Type const& _other) const
@@ -700,7 +700,7 @@ TypeResult IntegerType::binaryOperatorResult(Token _operator, TypePointer const&
if (auto intType = dynamic_pointer_cast<IntegerType const>(commonType))
{
if (Token::Exp == _operator && intType->isSigned())
return TypeResult{"Exponentiation is not allowed for signed integer types."};
return TypeResult::err("Exponentiation is not allowed for signed integer types.");
}
else if (auto fixType = dynamic_pointer_cast<FixedPointType const>(commonType))
if (Token::Exp == _operator)
@@ -729,7 +729,7 @@ BoolResult FixedPointType::isImplicitlyConvertibleTo(Type const& _convertTo) con
{
FixedPointType const& convertTo = dynamic_cast<FixedPointType const&>(_convertTo);
if (convertTo.fractionalDigits() < m_fractionalDigits)
return BoolResult{std::string("Too many fractional digits.")};
return BoolResult::err("Too many fractional digits.");
if (convertTo.numBits() < m_totalBits)
return false;
else
@@ -1145,7 +1145,7 @@ TypeResult RationalNumberType::binaryOperatorResult(Token _operator, TypePointer
uint32_t absExp = bigint(abs(exp)).convert_to<uint32_t>();
if (!fitsPrecisionExp(abs(m_value.numerator()), absExp) || !fitsPrecisionExp(abs(m_value.denominator()), absExp))
return TypeResult{"Precision of rational constants is limited to 4096 bits."};
return TypeResult::err("Precision of rational constants is limited to 4096 bits.");
static auto const optimizedPow = [](bigint const& _base, uint32_t _exponent) -> bigint {
if (_base == 1)
@@ -1226,7 +1226,7 @@ TypeResult RationalNumberType::binaryOperatorResult(Token _operator, TypePointer
// verify that numerator and denominator fit into 4096 bit after every operation
if (value.numerator() != 0 && max(mostSignificantBit(abs(value.numerator())), mostSignificantBit(abs(value.denominator()))) > 4096)
return TypeResult{"Precision of rational constants is limited to 4096 bits."};
return TypeResult::err("Precision of rational constants is limited to 4096 bits.");
return TypeResult(make_shared<RationalNumberType>(value));
}