private static bool IsPossiblyByRefTypeParameter(TypeSymbol type)
{
if (type.IsTypeParameter())
{
return(true);
}
if (type.IsErrorType())
{
//var byRefReturnType = type as ByRefReturnErrorTypeSymbol;
//return ((object)byRefReturnType != null) && byRefReturnType.ReferencedType.IsTypeParameter();
throw new NotImplementedException();
}
return(false);
}
/// <summary>
/// Returns true if this type derives from a given type.
/// </summary>
internal bool IsDerivedFrom(TypeSymbol type, bool ignoreDynamic, ref HashSet <DiagnosticInfo> useSiteDiagnostics)
{
Debug.Assert((object)type != null);
Debug.Assert(!type.IsTypeParameter());
if ((object)this == (object)type)
{
return(false);
}
var t = this.BaseTypeWithDefinitionUseSiteDiagnostics(ref useSiteDiagnostics);
while ((object)t != null)
{
if (type.Equals(t, ignoreDynamic: ignoreDynamic))
{
return(true);
}
t = t.BaseTypeWithDefinitionUseSiteDiagnostics(ref useSiteDiagnostics);
}
return(false);
}