private ConstantValue DecodeDefaultParameterValueAttribute(AttributeDescription description, CSharpAttributeData attribute, AttributeSyntax node, bool diagnose, DiagnosticBag diagnosticsOpt)
{
Debug.Assert(!attribute.HasErrors);
if (description.Equals(AttributeDescription.DefaultParameterValueAttribute))
{
return(DecodeDefaultParameterValueAttribute(attribute, node, diagnose, diagnosticsOpt));
}
else if (description.Equals(AttributeDescription.DecimalConstantAttribute))
{
return(attribute.DecodeDecimalConstantValue());
}
else
{
Debug.Assert(description.Equals(AttributeDescription.DateTimeConstantAttribute));
return(attribute.DecodeDateTimeConstantValue());
}
}
private ConstantValue DecodeDefaultParameterValueAttribute(AttributeDescription description, CSharpAttributeData attribute, AttributeSyntax node, bool diagnose, DiagnosticBag diagnosticsOpt)
{
Debug.Assert(!attribute.HasErrors);
if (description.Equals(AttributeDescription.DefaultParameterValueAttribute))
{
return DecodeDefaultParameterValueAttribute(attribute, node, diagnose, diagnosticsOpt);
}
else if (description.Equals(AttributeDescription.DecimalConstantAttribute))
{
return attribute.DecodeDecimalConstantValue();
}
else
{
Debug.Assert(description.Equals(AttributeDescription.DateTimeConstantAttribute));
return attribute.DecodeDateTimeConstantValue();
}
}
private CSharpAttributeData EarlyDecodeAttributeForDefaultParameterValue(AttributeDescription description, ref EarlyDecodeWellKnownAttributeArguments<EarlyWellKnownAttributeBinder, NamedTypeSymbol, AttributeSyntax, AttributeLocation> arguments)
{
Debug.Assert(description.Equals(AttributeDescription.DefaultParameterValueAttribute) ||
description.Equals(AttributeDescription.DecimalConstantAttribute) ||
description.Equals(AttributeDescription.DateTimeConstantAttribute));
bool hasAnyDiagnostics;
var attribute = arguments.Binder.GetAttribute(arguments.AttributeSyntax, arguments.AttributeType, out hasAnyDiagnostics);
ConstantValue value;
if (attribute.HasErrors)
{
value = ConstantValue.Bad;
hasAnyDiagnostics = true;
}
else
{
value = DecodeDefaultParameterValueAttribute(description, attribute, arguments.AttributeSyntax, diagnose: false, diagnosticsOpt: null);
}
var paramData = arguments.GetOrCreateData<ParameterEarlyWellKnownAttributeData>();
if (paramData.DefaultParameterValue == ConstantValue.Unset)
{
paramData.DefaultParameterValue = value;
}
return !hasAnyDiagnostics ? attribute : null;
}