protected virtual bool IsAttributeConditionallyOmitted(NamedTypeSymbol attributeType, SyntaxTree syntaxTree, ref HashSet<DiagnosticInfo> useSiteDiagnostics)
{
// When early binding attributes, we don't want to determine if the attribute type is conditional and if so, must be emitted or not.
// Invoking IsConditional property on attributeType can lead to a cycle, hence we delay this computation until after early binding.
if (IsEarlyAttributeBinder)
{
return false;
}
Debug.Assert((object)attributeType != null);
Debug.Assert(!attributeType.IsErrorType());
if (attributeType.IsConditional)
{
ImmutableArray<string> conditionalSymbols = attributeType.GetAppliedConditionalSymbols();
Debug.Assert(conditionalSymbols != null);
if (syntaxTree.IsAnyPreprocessorSymbolDefined(conditionalSymbols))
{
return false;
}
var baseType = attributeType.BaseTypeWithDefinitionUseSiteDiagnostics(ref useSiteDiagnostics);
if ((object)baseType != null && baseType.IsConditional)
{
return IsAttributeConditionallyOmitted(baseType, syntaxTree, ref useSiteDiagnostics);
}
return true;
}
else
{
return false;
}
}
