private void TransformFunctionNode(AbstractFunctionPtg afp, ParseNode[] children,
byte desiredOperandClass, bool callerForceArrayFlag)
{
bool localForceArrayFlag;
byte defaultReturnOperandClass = afp.DefaultOperandClass;
if (callerForceArrayFlag)
{
switch (defaultReturnOperandClass)
{
case Ptg.CLASS_REF:
if (desiredOperandClass == Ptg.CLASS_REF)
{
afp.PtgClass = (Ptg.CLASS_REF);
}
else
{
afp.PtgClass = (Ptg.CLASS_ARRAY);
}
localForceArrayFlag = false;
break;
case Ptg.CLASS_ARRAY:
afp.PtgClass = (Ptg.CLASS_ARRAY);
localForceArrayFlag = false;
break;
case Ptg.CLASS_VALUE:
afp.PtgClass = (Ptg.CLASS_ARRAY);
localForceArrayFlag = true;
break;
default:
throw new InvalidOperationException("Unexpected operand class ("
+ defaultReturnOperandClass + ")");
}
}
else
{
if (defaultReturnOperandClass == desiredOperandClass)
{
localForceArrayFlag = false;
// an alternative would have been To for non-base Ptgs To Set their operand class
// from their default, but this would require the call in many subclasses because
// the default OC is not known until the end of the constructor
afp.PtgClass = (defaultReturnOperandClass);
}
else
{
switch (desiredOperandClass)
{
case Ptg.CLASS_VALUE:
// always OK To Set functions To return 'value'
afp.PtgClass = (Ptg.CLASS_VALUE);
localForceArrayFlag = false;
break;
case Ptg.CLASS_ARRAY:
switch (defaultReturnOperandClass)
{
case Ptg.CLASS_REF:
afp.PtgClass = (Ptg.CLASS_REF);
// afp.SetClass(Ptg.CLASS_ARRAY);
break;
case Ptg.CLASS_VALUE:
afp.PtgClass = (Ptg.CLASS_ARRAY);
break;
default:
throw new InvalidOperationException("Unexpected operand class ("
+ defaultReturnOperandClass + ")");
}
localForceArrayFlag = (defaultReturnOperandClass == Ptg.CLASS_VALUE);
break;
case Ptg.CLASS_REF:
switch (defaultReturnOperandClass)
{
case Ptg.CLASS_ARRAY:
afp.PtgClass=(Ptg.CLASS_ARRAY);
break;
case Ptg.CLASS_VALUE:
afp.PtgClass=(Ptg.CLASS_VALUE);
break;
default:
throw new InvalidOperationException("Unexpected operand class ("
+ defaultReturnOperandClass + ")");
}
localForceArrayFlag = false;
break;
default:
throw new InvalidOperationException("Unexpected operand class ("
+ desiredOperandClass + ")");
}
}
}
for (int i = 0; i < children.Length; i++)
{
ParseNode child = children[i];
byte paramOperandClass = afp.GetParameterClass(i);
TransformNode(child, paramOperandClass, localForceArrayFlag);
}
}