internal void SetMarshalAsSafeArray(Cci.VarEnum?elementType, ITypeSymbolInternal elementTypeSymbol)
{
Debug.Assert(elementType == null || elementType >= 0 && (int)elementType <= MaxMarshalInteger);
_marshalType = Cci.Constants.UnmanagedType_SafeArray;
_marshalArrayElementType = (int)(elementType ?? InvalidVariantType);
_marshalTypeNameOrSymbol = elementTypeSymbol;
}
private static void DecodeMarshalAsSafeArray(ref DecodeWellKnownAttributeArguments <TAttributeSyntax, TAttributeData, TAttributeLocation> arguments, CommonMessageProvider messageProvider)
{
Debug.Assert((object)arguments.AttributeSyntaxOpt != null);
Cci.VarEnum? elementTypeVariant = null;
ITypeSymbolInternal elementTypeSymbol = null;
int symbolIndex = -1;
bool hasErrors = false;
int position = 1;
foreach (var namedArg in arguments.Attribute.NamedArguments)
{
switch (namedArg.Key)
{
case "SafeArraySubType":
elementTypeVariant = namedArg.Value.DecodeValue <Cci.VarEnum>(SpecialType.System_Enum);
if (elementTypeVariant < 0 || (int)elementTypeVariant > MarshalPseudoCustomAttributeData.MaxMarshalInteger)
{
messageProvider.ReportInvalidNamedArgument(arguments.Diagnostics, arguments.AttributeSyntaxOpt, position, arguments.Attribute.AttributeClass, namedArg.Key);
hasErrors = true;
}
break;
case "SafeArrayUserDefinedSubType":
elementTypeSymbol = namedArg.Value.DecodeValue <ITypeSymbolInternal>(SpecialType.None);
symbolIndex = position;
break;
case "ArraySubType":
case "SizeConst":
case "SizeParamIndex":
messageProvider.ReportParameterNotValidForType(arguments.Diagnostics, arguments.AttributeSyntaxOpt, position);
hasErrors = true;
break;
// other parameters ignored with no error
}
position++;
}
switch (elementTypeVariant)
{
case Cci.VarEnum.VT_DISPATCH:
case Cci.VarEnum.VT_UNKNOWN:
case Cci.VarEnum.VT_RECORD:
// only these variants accept specification of user defined subtype
break;
default:
if (elementTypeVariant != null && symbolIndex >= 0)
{
messageProvider.ReportParameterNotValidForType(arguments.Diagnostics, arguments.AttributeSyntaxOpt, symbolIndex);
hasErrors = true;
}
else
{
// type ignored:
elementTypeSymbol = null;
}
break;
}
if (!hasErrors)
{
arguments.GetOrCreateData <TWellKnownAttributeData>().GetOrCreateData().SetMarshalAsSafeArray(elementTypeVariant, elementTypeSymbol);
}
}