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Type conversion specialities for storage references.

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This commit is contained in:
chriseth 2015-06-16 17:20:41 +02:00
parent a5664d0535
commit 17efc42299
3 changed files with 20 additions and 15 deletions
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9
CompilerUtils.cpp
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@ -274,10 +274,13 @@ void CompilerUtils::encodeToMemory(
else
{
copyToStackTop(argSize - stackPos + dynPointers + 2, _givenTypes[i]->getSizeOnStack());
if (targetType->isValueType())
convertType(*_givenTypes[i], *targetType, true);
solAssert(!!targetType, "Externalable type expected.");
storeInMemoryDynamic(*targetType, _padToWordBoundaries);
TypePointer type = targetType;
if (_givenTypes[i]->isInStorage())
type = _givenTypes[i]; // delay conversion
else
convertType(*_givenTypes[i], *targetType, true);
storeInMemoryDynamic(*type, _padToWordBoundaries);
}
stackPos += _givenTypes[i]->getSizeOnStack();
}

23
ExpressionCompiler.cpp
View File

@ -146,10 +146,13 @@ bool ExpressionCompiler::visit(Assignment const& _assignment)
{
CompilerContext::LocationSetter locationSetter(m_context, _assignment);
_assignment.getRightHandSide().accept(*this);
if (_assignment.getType()->isValueType())
utils().convertType(*_assignment.getRightHandSide().getType(), *_assignment.getType());
// We need this conversion mostly in the case of compound assignments. For non-value types
// the conversion is done in LValue::storeValue.
TypePointer type = _assignment.getRightHandSide().getType();
if (!_assignment.getType()->isInStorage())
{
utils().convertType(*type, *_assignment.getType());
type = _assignment.getType();
}
_assignment.getLeftHandSide().accept(*this);
solAssert(!!m_currentLValue, "LValue not retrieved.");
@ -175,7 +178,7 @@ bool ExpressionCompiler::visit(Assignment const& _assignment)
m_context << eth::swapInstruction(itemSize + lvalueSize) << eth::Instruction::POP;
}
}
m_currentLValue->storeValue(*_assignment.getRightHandSide().getType(), _assignment.getLocation());
m_currentLValue->storeValue(*type, _assignment.getLocation());
m_currentLValue.reset();
return false;
}
@ -1119,14 +1122,10 @@ void ExpressionCompiler::appendExternalFunctionCall(
void ExpressionCompiler::appendExpressionCopyToMemory(Type const& _expectedType, Expression const& _expression)
{
solAssert(_expectedType.isValueType(), "Not implemented for non-value types.");
_expression.accept(*this);
if (_expectedType.isValueType())
{
utils().convertType(*_expression.getType(), _expectedType, true);
utils().storeInMemoryDynamic(_expectedType);
}
else
utils().storeInMemoryDynamic(*_expression.getType()->mobileType());
utils().convertType(*_expression.getType(), _expectedType, true);
utils().storeInMemoryDynamic(_expectedType);
}
void ExpressionCompiler::setLValueFromDeclaration(Declaration const& _declaration, Expression const& _expression)

3
Types.h
View File

@ -202,6 +202,8 @@ public:
/// This returns the corresponding integer type for IntegerConstantTypes and the pointer type
/// for storage reference types.
virtual TypePointer mobileType() const { return shared_from_this(); }
/// @returns true if this type is a storage pointer or reference.
virtual bool isInStorage() const { return false; }
/// Returns the list of all members of this type. Default implementation: no members.
virtual MemberList const& getMembers() const { return EmptyMemberList; }
@ -374,6 +376,7 @@ public:
virtual TypePointer copyForLocation(Location _location, bool _isPointer) const = 0;
virtual TypePointer mobileType() const override { return copyForLocation(m_location, true); }
virtual bool isInStorage() const override { return m_location == Location::Storage; }
/// Storage references can be pointers or bound references. In general, local variables are of
/// pointer type, state variables are bound references. Assignments to pointers or deleting