private static void DecodeMarshalAsCustom(ref DecodeWellKnownAttributeArguments <TAttributeSyntax, TAttributeData, TAttributeLocation> arguments, CommonMessageProvider messageProvider)
{
Debug.Assert((object)arguments.AttributeSyntaxOpt != null);
ITypeSymbol typeSymbol = null;
string typeName = null;
string cookie = null;
bool hasTypeName = false;
bool hasTypeSymbol = false;
bool hasErrors = false;
int position = 1;
foreach (var namedArg in arguments.Attribute.NamedArguments)
{
switch (namedArg.Key)
{
case "MarshalType":
typeName = namedArg.Value.DecodeValue <string>(SpecialType.System_String);
if (!MetadataHelpers.IsValidUnicodeString(typeName))
{
messageProvider.ReportInvalidNamedArgument(arguments.Diagnostics, arguments.AttributeSyntaxOpt, position, arguments.Attribute.AttributeClass, namedArg.Key);
hasErrors = true;
}
hasTypeName = true; // even if MarshalType == null
break;
case "MarshalTypeRef":
typeSymbol = namedArg.Value.DecodeValue <ITypeSymbol>(SpecialType.None);
hasTypeSymbol = true; // even if MarshalTypeRef == null
break;
case "MarshalCookie":
cookie = namedArg.Value.DecodeValue <string>(SpecialType.System_String);
if (!MetadataHelpers.IsValidUnicodeString(cookie))
{
messageProvider.ReportInvalidNamedArgument(arguments.Diagnostics, arguments.AttributeSyntaxOpt, position, arguments.Attribute.AttributeClass, namedArg.Key);
hasErrors = true;
}
break;
// other parameters ignored with no error
}
position++;
}
if (!hasTypeName && !hasTypeSymbol)
{
// MarshalType or MarshalTypeRef must be specified:
messageProvider.ReportAttributeParameterRequired(arguments.Diagnostics, arguments.AttributeSyntaxOpt, "MarshalType", "MarshalTypeRef");
hasErrors = true;
}
if (!hasErrors)
{
arguments.GetOrCreateData <TWellKnownAttributeData>().GetOrCreateData().SetMarshalAsCustom(hasTypeName ? (object)typeName : typeSymbol, cookie);
}
}
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);
}
}