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Bugfix for functions override

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- Functions with byte array type parameters can now be safely
  overriden. Parameter location is now set at the right place.

- Also made a test for the fix
This commit is contained in:
Lefteris Karapetsas 2015-02-19 17:43:53 +01:00
parent a2f5ea88b8
commit 26132363d5
3 changed files with 12 additions and 17 deletions
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19
AST.cpp
View File

@ -274,15 +274,6 @@ TypePointer FunctionDefinition::getType(ContractDefinition const*) const
void FunctionDefinition::checkTypeRequirements()
{
// change all byte arrays parameters to point to calldata
if (getVisibility() == Visibility::External)
for (ASTPointer<VariableDeclaration> const& var: getParameters())
{
auto const& type = var->getType();
solAssert(!!type, "");
if (auto const* byteArrayType = dynamic_cast<ByteArrayType const*>(type.get()))
var->setType(byteArrayType->copyForLocation(ByteArrayType::Location::CallData));
}
for (ASTPointer<VariableDeclaration> const& var: getParameters() + getReturnParameters())
if (!var->getType()->canLiveOutsideStorage())
BOOST_THROW_EXCEPTION(var->createTypeError("Type is required to live outside storage."));
@ -299,16 +290,14 @@ string FunctionDefinition::getCanonicalSignature() const
bool VariableDeclaration::isLValue() const
{
if (auto const* function = dynamic_cast<FunctionDefinition const*>(getScope()))
if (function->getVisibility() == Declaration::Visibility::External && isFunctionParameter())
return false;
return true;
// External function parameters are Read-Only
return !isExternalFunctionParameter();
}
bool VariableDeclaration::isFunctionParameter() const
bool VariableDeclaration::isExternalFunctionParameter() const
{
auto const* function = dynamic_cast<FunctionDefinition const*>(getScope());
if (!function)
if (!function || function->getVisibility() != Declaration::Visibility::External)
return false;
for (auto const& variable: function->getParameters())
if (variable.get() == this)

2
AST.h
View File

@ -448,7 +448,7 @@ public:
virtual bool isLValue() const override;
bool isLocalVariable() const { return !!dynamic_cast<FunctionDefinition const*>(getScope()); }
bool isFunctionParameter() const;
bool isExternalFunctionParameter() const;
bool isStateVariable() const { return m_isStateVariable; }
bool isIndexed() const { return m_isIndexed; }

8
NameAndTypeResolver.cpp
View File

@ -333,7 +333,13 @@ void ReferencesResolver::endVisit(VariableDeclaration& _variable)
// or mapping
if (_variable.getTypeName())
{
_variable.setType(_variable.getTypeName()->toType());
TypePointer type = _variable.getTypeName()->toType();
// All byte array parameter types should point to call data
if (_variable.isExternalFunctionParameter())
if (auto const* byteArrayType = dynamic_cast<ByteArrayType const*>(type.get()))
type = byteArrayType->copyForLocation(ByteArrayType::Location::CallData);
_variable.setType(type);
if (!_variable.getType())
BOOST_THROW_EXCEPTION(_variable.getTypeName()->createTypeError("Invalid type name"));
}