Method NodeVariableModify

NULLC/SyntaxTree.cpp:819–874

// Node to change variable value with following operations: += -= *= /= **= %= <<= >>= &= |= ^=

NodeVariableModify::NodeVariableModify(TypeInfo* targetType, CmdID cmd)
{
	assert(targetType);
	typeInfo = targetType->subType;

	cmdID = cmd;

	second = TakeLastNode();

	// Address of the target variable
	first = TakeLastNode();
	assert(first->typeInfo->refLevel != 0);

	if(second->typeInfo == typeVoid)
		ThrowError(CodeInfo::lastKnownStartPos, "ERROR: cannot convert from void to %s", typeInfo->GetFullTypeName());
	if(typeInfo == typeVoid)
		ThrowError(CodeInfo::lastKnownStartPos, "ERROR: cannot convert from %s to void", second->typeInfo->GetFullTypeName());
	if(first->typeInfo->subType->refLevel != 0 || second->typeInfo->refLevel != 0 || typeInfo->type == TypeInfo::TYPE_COMPLEX || second->typeInfo->type == TypeInfo::TYPE_COMPLEX)
		ThrowError(CodeInfo::lastKnownStartPos, "ERROR: there is no built-in operator for types '%s' and '%s'", typeInfo->GetFullTypeName(), second->typeInfo->GetFullTypeName());

	// If types don't match
	if(second->typeInfo != typeInfo)
	{
		// If it is not built-in basic types or if pointers point to different types
		if(typeInfo->type == TypeInfo::TYPE_COMPLEX || second->typeInfo->type == TypeInfo::TYPE_COMPLEX || typeInfo->subType != second->typeInfo->subType)
			ThrowError(CodeInfo::lastKnownStartPos, "ERROR: cannot convert '%s' to '%s'", second->typeInfo->GetFullTypeName(), typeInfo->GetFullTypeName());
	}

	if((first->typeInfo->subType == typeDouble || first->typeInfo->subType == typeFloat || second->typeInfo == typeDouble || second->typeInfo == typeFloat) && (cmd >= cmdShl && cmd <= cmdLogXor))
		ThrowError(CodeInfo::lastKnownStartPos, "ERROR: binary operations are not available on floating-point numbers");

	absAddress = true;
	knownAddress = false;
	addrShift = 0;

#ifndef NULLC_ENABLE_C_TRANSLATION
	if(first->nodeType == typeNodeGetAddress)
	{
		absAddress = static_cast<NodeGetAddress*>(first)->IsAbsoluteAddress();
		addrShift = static_cast<NodeGetAddress*>(first)->varAddress;
		knownAddress = true;
	}
	if(first->nodeType == typeNodeShiftAddress)
	{
		addrShift = static_cast<NodeShiftAddress*>(first)->memberShift;
		first = static_cast<NodeShiftAddress*>(first)->first;
	}
	if(first->nodeType == typeNodeArrayIndex && static_cast<NodeArrayIndex*>(first)->knownShift)
	{
		addrShift = static_cast<NodeArrayIndex*>(first)->shiftValue;
		first = static_cast<NodeArrayIndex*>(first)->first;
	}
#endif

	nodeType = typeNodeVariableModify;
}

NodeVariableModify::~NodeVariableModify()