private static void DecodeMarshalAsFixedString(ref DecodeWellKnownAttributeArguments <TAttributeSyntax, TAttributeData, TAttributeLocation> arguments, CommonMessageProvider messageProvider)
{
Debug.Assert((object)arguments.AttributeSyntaxOpt != null);
int elementCount = -1;
int position = 1;
bool hasErrors = false;
foreach (var namedArg in arguments.Attribute.NamedArguments)
{
switch (namedArg.Key)
{
case "SizeConst":
elementCount = namedArg.Value.DecodeValue <int>(SpecialType.System_Int32);
if (elementCount < 0 || elementCount > MarshalPseudoCustomAttributeData.MaxMarshalInteger)
{
messageProvider.ReportInvalidNamedArgument(arguments.Diagnostics, arguments.AttributeSyntaxOpt, position, arguments.Attribute.AttributeClass, namedArg.Key);
hasErrors = true;
}
break;
case "ArraySubType":
case "SizeParamIndex":
messageProvider.ReportParameterNotValidForType(arguments.Diagnostics, arguments.AttributeSyntaxOpt, position);
hasErrors = true;
break;
// other parameters ignored with no error
}
position++;
}
if (elementCount < 0)
{
// SizeConst must be specified:
messageProvider.ReportAttributeParameterRequired(arguments.Diagnostics, arguments.AttributeSyntaxOpt, "SizeConst");
hasErrors = true;
}
if (!hasErrors)
{
arguments.GetOrCreateData <TWellKnownAttributeData>().GetOrCreateData().SetMarshalAsFixedString(elementCount);
}
}
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);
}
}
private static void DecodeMarshalAsArray(ref DecodeWellKnownAttributeArguments <TAttributeSyntax, TAttributeData, TAttributeLocation> arguments, CommonMessageProvider messageProvider, bool isFixed)
{
Debug.Assert((object)arguments.AttributeSyntaxOpt != null);
UnmanagedType?elementType = null;
int? elementCount = isFixed ? 1 : (int?)null;
short? parameterIndex = null;
bool hasErrors = false;
int position = 1;
foreach (var namedArg in arguments.Attribute.NamedArguments)
{
switch (namedArg.Key)
{
// array:
case "ArraySubType":
elementType = namedArg.Value.DecodeValue <UnmanagedType>(SpecialType.System_Enum);
// for some reason, Dev10 metadata writer disallows CustomMarshaler type as an element type of non-fixed arrays
if (!isFixed && elementType == Cci.Constants.UnmanagedType_CustomMarshaler ||
(int)elementType < 0 ||
(int)elementType > MarshalPseudoCustomAttributeData.MaxMarshalInteger)
{
messageProvider.ReportInvalidNamedArgument(arguments.Diagnostics, arguments.AttributeSyntaxOpt, position, arguments.Attribute.AttributeClass, namedArg.Key);
hasErrors = true;
}
break;
case "SizeConst":
elementCount = namedArg.Value.DecodeValue <int>(SpecialType.System_Int32);
if (elementCount < 0 || elementCount > MarshalPseudoCustomAttributeData.MaxMarshalInteger)
{
messageProvider.ReportInvalidNamedArgument(arguments.Diagnostics, arguments.AttributeSyntaxOpt, position, arguments.Attribute.AttributeClass, namedArg.Key);
hasErrors = true;
}
break;
case "SizeParamIndex":
if (isFixed)
{
goto case "SafeArraySubType";
}
parameterIndex = namedArg.Value.DecodeValue <short>(SpecialType.System_Int16);
if (parameterIndex < 0)
{
messageProvider.ReportInvalidNamedArgument(arguments.Diagnostics, arguments.AttributeSyntaxOpt, position, arguments.Attribute.AttributeClass, namedArg.Key);
hasErrors = true;
}
break;
case "SafeArraySubType":
messageProvider.ReportParameterNotValidForType(arguments.Diagnostics, arguments.AttributeSyntaxOpt, position);
hasErrors = true;
break;
// other parameters ignored with no error
}
position++;
}
if (!hasErrors)
{
var data = arguments.GetOrCreateData <TWellKnownAttributeData>().GetOrCreateData();
if (isFixed)
{
data.SetMarshalAsFixedArray(elementType, elementCount);
}
else
{
data.SetMarshalAsArray(elementType, elementCount, parameterIndex);
}
}
}
