/// <summary>
/// Finishes the write operation starte by <see cref="Emit"/>.
/// </summary>
internal override PhpTypeCode EmitAssign(CodeGenerator /*!*/ codeGenerator)
{
ChainBuilder chain = codeGenerator.ChainBuilder;
PhpTypeCode result;
switch (access)
{
case AccessType.WriteAndReadRef:
case AccessType.WriteAndReadUnknown:
case AccessType.ReadAndWrite:
case AccessType.ReadAndWriteAndReadRef:
case AccessType.ReadAndWriteAndReadUnknown:
case AccessType.Write:
case AccessType.WriteRef:
{
bool reference = access == AccessType.WriteRef;
// Note that some work was done in Emit() !
// In cases 3, 4, 5 EmitAssign is not called
if (isMemberOf != null ||
(isMemberOf == null && (array is DirectStFldUse || array is IndirectStFldUse || array is ItemUse)))
{
// 2, 6, 7
chain.EmitSetArrayItem(indexTypeCode, index, reference);
chain.End();
}
else
{
// Note: The value which should be stored is already loaded on the evaluation stack.
// Push the destination array and index and call the operator
// 1: a_[x]_
Debug.Assert(array is SimpleVarUse);
chain.IsArrayItem = true;
chain.IsLastMember = true;
indexTypeCode = codeGenerator.EmitArrayKey(chain, index);
array.Emit(codeGenerator);
chain.EmitSetItem(indexTypeCode, index, reference);
// Store the changed variable into table of variables (do nothing in optimalized functions)
((SimpleVarUse)array).EmitLoadAddress_StoreBack(codeGenerator);
}
result = PhpTypeCode.Void;
break;
}
case AccessType.None:
// do nothing
result = PhpTypeCode.Void;
break;
case AccessType.Read:
// do nothing
result = PhpTypeCode.Object;
break;
case AccessType.ReadRef:
// Do nothing
result = PhpTypeCode.PhpReference;
break;
default:
Debug.Fail();
result = PhpTypeCode.Invalid;
break;
}
return(result);
}
